/* ===== VARIABLES CSS - GLASSMORPHISM + NEÓN NARANJA ===== */
/* Test: Verificación deploy Netlify desde rama main */
:root {
    /* Colores principales - Neón Naranja */
    --primary-color: #ff6b35;
    --primary-dark: #e55a2b;
    --secondary-color: #ff9500;
    --accent-color: #ffcd3c;
    
    /* Colores neón */
    --neon-orange: #ff6b35;
    --neon-orange-glow: rgba(255, 107, 53, 0.5);
    --neon-yellow: #ffcd3c;
    --neon-yellow-glow: rgba(255, 205, 60, 0.3);
    
    /* Colores de fondo - Glassmorphism */
    --bg-primary: rgba(15, 20, 25, 0.95);
    --bg-secondary: rgba(26, 31, 46, 0.8);
    --bg-tertiary: rgba(37, 42, 58, 0.7);
    --bg-card: rgba(45, 52, 71, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.1);
    --bg-glass-hover: rgba(255, 255, 255, 0.15);
    
    /* Colores de texto */
    --text-primary: #ffffff;
    --text-secondary: #e5e7eb;
    --text-muted: #9ca3af;
    
    /* Colores de estado con neón */
    --success-color: #10b981;
    --warning-color: #ff9500;
    --error-color: #ff4444;
    
    /* Sombras con glow */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-neon: 0 0 20px var(--neon-orange-glow);
    --shadow-neon-strong: 0 0 30px var(--neon-orange-glow), 0 0 60px rgba(255, 107, 53, 0.3);
    
    /* Bordes con glass effect */
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-color: rgba(255, 255, 255, 0.2);
    --border-glass: 1px solid rgba(255, 255, 255, 0.18);
    
    /* Backdrop blur para glassmorphism */
    --backdrop-blur: blur(10px);
    --backdrop-blur-strong: blur(20px);
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Tipografía */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Transiciones */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* ===== RESET Y BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* PREVENCIÓN GLOBAL DE OVERFLOW */
html, body {
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background: 
        url('../assets/Progressor.png') center center/cover no-repeat fixed,
        radial-gradient(circle at 20% 50%, rgba(255, 107, 53, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 149, 0, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(255, 205, 60, 0.1) 0%, transparent 50%),
        linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden; /* Ocultar scroll horizontal del body para evitar conflictos */
    overflow-y: auto; /* Solo scroll vertical en el body */
    padding-top: 80px; /* Espacio para header fijo */
    width: 100%;
    max-width: 100vw; /* No exceder el ancho de viewport */
}

/* ===== HEADER ===== */
.header {
    background: var(--bg-glass);
    border-bottom: var(--border-glass);
    box-shadow: var(--shadow-neon);
    padding: var(--spacing-md) 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: var(--backdrop-blur-strong);
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
    transform: translateY(0);
}

.header.hidden {
    transform: translateY(-100%);
    opacity: 0;
}

.header.visible {
    transform: translateY(0);
    opacity: 1;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    height: 40px;
    width: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    animation: logoFloat 3s ease-in-out infinite;
}

.logo i {
    font-size: var(--font-size-3xl);
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: pulse 2s infinite;
}

.by-semo {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 400;
    margin-left: var(--spacing-sm);
}

.header-controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

/* ===== LANGUAGE SELECTOR ===== */
.language-selector {
    position: relative;
    display: inline-block;
}

.btn-language {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    min-width: 100px;
}

.btn-language:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.btn-language:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.btn-language i.fa-chevron-down {
    transition: transform var(--transition-fast);
    font-size: 0.8em;
}

.language-selector.show .btn-language i.fa-chevron-down {
    transform: rotate(180deg);
}

.language-selector.show .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 5px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    min-width: 180px;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.language-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    width: 100%;
    text-align: left;
    font-size: var(--font-size-sm);
}

.language-option:hover {
    background: var(--bg-tertiary);
}

.language-option.active {
    background: var(--primary-color);
    color: white;
}

.language-option.active:hover {
    background: var(--primary-dark);
}

.flag-icon {
    width: 20px;
    height: auto;
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.language-notification {
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.btn-save,
.btn-account,
.btn-help {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-save:hover,
.btn-account:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-help:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

/* ===== SECCIONES ===== */
.chord-palette,
.progression-builder {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.chord-palette h2,
.progression-builder h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
}

.chord-palette h2 i {
    color: var(--accent-color);
}

.progression-builder h2 i {
    color: var(--primary-color);
}

/* ===== CHORD PALETTE ===== */
/* Pestañas de tipos de acordes */
.chord-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
    position: relative;
    padding-bottom: var(--spacing-xs);
}

.chord-tabs::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.chord-tab {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-bottom: none;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
}

.chord-tab:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.chord-tab.active {
    background: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.3);
}

.chord-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

/* ===== CONTROLES DE OCTAVA ===== */
.octave-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.octave-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    min-width: 100px;
    justify-content: center;
}

.octave-btn:hover {
    background: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.octave-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.octave-display {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    min-width: 100px;
    text-align: center;
}

.chord-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.chord-item {
    background: linear-gradient(145deg, var(--bg-tertiary) 0%, var(--bg-secondary) 25%, var(--bg-card) 75%, var(--bg-primary) 100%);
    border: 2px solid var(--border-color);
    border-top: 2px solid rgba(255, 255, 255, 0.2);
    border-left: 2px solid rgba(255, 255, 255, 0.2);
    border-bottom: 2px solid rgba(0, 0, 0, 0.3);
    border-right: 2px solid rgba(0, 0, 0, 0.3);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: visible;
    box-shadow: 
        0 4px 8px rgba(0, 0, 0, 0.3),
        0 2px 4px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    font-weight: 600;
    color: var(--text-primary);
    min-height: 70px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.chord-item > * {
    position: relative;
    z-index: 1;
}

.chord-item::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
    border-radius: calc(var(--border-radius-lg) + 1px);
    z-index: -1;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.chord-item:hover {
    background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-tertiary) 25%, var(--bg-secondary) 75%, var(--bg-primary) 100%);
    border-color: var(--primary-color);
    border-top: 2px solid rgba(255, 255, 255, 0.3);
    border-left: 2px solid rgba(255, 255, 255, 0.3);
    border-bottom: 2px solid var(--primary-color);
    border-right: 2px solid var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 
        0 6px 12px rgba(var(--primary-rgb), 0.3),
        0 3px 6px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.3);
    color: var(--primary-color);
}

.chord-item:hover::before {
    opacity: 1;
}

.chord-item:active {
    cursor: grabbing;
    transform: translateY(1px);
    background: linear-gradient(145deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    border: 2px solid var(--border-color);
    border-top: 2px solid rgba(0, 0, 0, 0.4);
    border-left: 2px solid rgba(0, 0, 0, 0.4);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    border-right: 2px solid rgba(255, 255, 255, 0.1);
    box-shadow: 
        0 1px 2px rgba(0, 0, 0, 0.4),
        inset 0 2px 4px rgba(0, 0, 0, 0.3),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);
}

.chord-item.dragging {
    opacity: 0.5;
    transform: rotate(5deg) scale(1.1);
    z-index: 1000;
}

.chord-item.previewing,
.chord-item.previewing {
    background: linear-gradient(145deg, var(--accent-color), var(--primary-dark)) !important;
    border-color: var(--accent-color) !important;
    border-top: 1px solid rgba(255, 255, 255, 0.3) !important;
    border-left: 1px solid rgba(255, 255, 255, 0.3) !important;
    color: var(--text-light);
    transform: scale(1.1);
    box-shadow: 
        0 6px 16px rgba(var(--accent-rgb), 0.4),
        0 2px 8px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.3) !important;
    animation: pulsePreview 0.8s ease-out;
}

@keyframes pulsePreview {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1.1); }
}

.no-chords {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    font-style: italic;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-tertiary);
}

.chord-symbol {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-fast);
    line-height: 1.1;
    letter-spacing: 0.5px;
}

.chord-name {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-fast);
    opacity: 0.8;
}

.chord-item:hover .chord-symbol {
    color: var(--primary-color);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.chord-item:hover .chord-name {
    color: var(--primary-color);
    opacity: 1;
}

.key-controls {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.key-selector-group {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.major-keys,
.minor-keys {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.key-controls label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

#majorKeySelect,
#minorKeySelect {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    cursor: pointer;
    min-width: 120px;
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

#majorKeySelect:hover,
#minorKeySelect:hover {
    border-color: var(--accent-color);
    box-shadow: 
        0 6px 20px rgba(0, 0, 0, 0.3),
        0 0 15px rgba(255, 140, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

#majorKeySelect:focus,
#minorKeySelect:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 
        0 8px 25px rgba(0, 0, 0, 0.4),
        0 0 20px rgba(255, 140, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* ===== PRESET PROGRESSIONS INLINE ===== */
.preset-progressions-inline {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-left: 4px solid var(--warning-color);
}

.preset-progressions-inline h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
}

.preset-progressions-inline h3 i {
    color: var(--warning-color);
}

.preset-progressions-inline .preset-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.preset-progressions-inline .preset-selector-group {
    display: grid;
    grid-template-columns: 1fr 2fr auto;
    gap: var(--spacing-sm);
    align-items: end;
}

.preset-progressions-inline .preset-category,
.preset-progressions-inline .preset-progression {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.preset-progressions-inline .preset-category label,
.preset-progressions-inline .preset-progression label {
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.preset-progressions-inline .preset-category select,
.preset-progressions-inline .preset-progression select {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.preset-progressions-inline .preset-category select:hover,
.preset-progressions-inline .preset-progression select:hover {
    border-color: var(--primary-color);
    background: var(--glass-bg);
    box-shadow: 
        0 6px 20px rgba(0, 0, 0, 0.3),
        0 0 15px rgba(255, 140, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.preset-progressions-inline .preset-category select:focus,
.preset-progressions-inline .preset-progression select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 
        0 8px 25px rgba(0, 0, 0, 0.4),
        0 0 20px rgba(255, 140, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.preset-progressions-inline .preset-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.preset-progressions-inline .btn-preset-load {
    background: linear-gradient(145deg, var(--primary-color), var(--accent-color));
    border: none;
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
    font-size: var(--font-size-sm);
}

.preset-progressions-inline .btn-preset-load:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.preset-progressions-inline .btn-preset-load:active {
    transform: translateY(0);
}

.preset-progressions-inline .btn-preset-load:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.preset-progressions-inline .preset-info {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
}

.preset-progressions-inline .preset-description {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
    font-size: var(--font-size-sm);
}

.preset-progressions-inline .preset-pattern {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.preset-progressions-inline .preset-pattern .pattern-chords {
    font-family: 'Courier New', monospace;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-card);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-xs);
    border: 1px solid var(--border-color);
    font-size: var(--font-size-xs);
}

/* ===== PROGRESSION BUILDER ===== */
.progression-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.progression-slots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    min-height: 120px;
}

.progression-slot {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition-fast);
    min-height: 100px;
}

.progression-slot.drag-over {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    transform: scale(1.05);
}

.progression-slot.filled {
    background: var(--bg-tertiary);
    border-style: solid;
    border-color: var(--primary-color);
}

.progression-slot .slot-number {
    position: absolute;
    top: var(--spacing-xs);
    left: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 12px;
}

.progression-slot .chord-display {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.progression-slot .duration-selector {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    align-items: center;
}

.progression-slot .duration-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-weight: 500;
}

.progression-slot .duration-select {
    padding: var(--spacing-xs);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    font-size: var(--font-size-xs);
    cursor: pointer;
    min-width: 90px; /* Aumentado para acomodar "3/4 compás" */
    transition: all var(--transition-fast);
    box-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.progression-slot .duration-select:hover {
    border-color: var(--primary-color);
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.3),
        0 0 10px rgba(255, 140, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.progression-slot .duration-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-rgb), 0.2);
}

.progression-slot .placeholder {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-align: center;
}

.remove-chord {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.progression-slot.filled:hover .remove-chord {
    opacity: 1;
}

/* Estilos de botones eliminados - ahora están en playback-controls */

.btn-play,
.btn-stop,
.btn-loop,
.btn-metronome,
.btn-clear,
.btn-export {
    background: linear-gradient(145deg, var(--bg-tertiary), var(--bg-secondary));
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 10px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 130px;
    justify-content: center;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.btn-play::before,
.btn-stop::before,
.btn-loop::before,
.btn-metronome::before,
.btn-clear::before,
.btn-export::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-play:hover::before,
.btn-stop:hover::before,
.btn-loop:hover::before,
.btn-metronome:hover::before,
.btn-clear:hover::before,
.btn-export:hover::before {
    left: 100%;
}

.btn-play:hover {
    background: linear-gradient(145deg, var(--success-color), #059669);
    border-color: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-stop:hover {
    background: linear-gradient(145deg, var(--error-color), #dc2626);
    border-color: var(--error-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-loop:hover {
    background: linear-gradient(145deg, var(--secondary-color), #0284c7);
    border-color: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.btn-metronome:hover {
    background: linear-gradient(145deg, #f97316, #ea580c);
    border-color: #f97316;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

.btn-clear:hover {
    background: linear-gradient(145deg, var(--error-color), #dc2626);
    border-color: var(--error-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-export:hover {
    background: linear-gradient(145deg, var(--accent-color), #d97706);
    border-color: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-play.playing {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.btn-play.paused {
    background: linear-gradient(145deg, #f59e0b, #d97706);
    border-color: #f59e0b;
    color: white;
}

.btn-stop.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.btn-loop.active {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-metronome.active {
    background: linear-gradient(145deg, #f97316, #ea580c);
    border-color: #f97316;
    color: white;
    box-shadow: 0 0 15px rgba(249, 115, 22, 0.4);
}

.btn-metronome.active::after {
    content: '♪';
    position: absolute;
    top: -8px;
    right: -8px;
    width: 20px;
    height: 20px;
    background: #ea580c;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    animation: metronome-pulse 1s infinite;
}

@keyframes metronome-pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

/* ===== PROGRESSION INFO ===== */
.progression-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.current-chord,
.progression-pattern {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

.chord-name,
.pattern-display {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-color);
}

/* ===== PIANO BUILDER ZONE ===== */
.advertisement-zone {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: linear-gradient(145deg, var(--bg-tertiary), var(--bg-secondary));
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

/* Piano Builder Zone - Nueva ubicación prominente */
.piano-builder-zone {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) 0;
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: visible; /* Cambiar de hidden a visible */
    transition: all var(--transition-medium);
    animation: fadeInUp 0.6s ease-out;
    display: block !important; /* Forzar visualización */
    opacity: 1 !important;
    visibility: visible !important;
    min-height: 200px; /* Asegurar altura mínima */
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.piano-builder-zone:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.piano-builder-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--primary-color));
    z-index: 1;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.piano-builder-container {
    max-width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    display: block !important; /* Forzar visualización */
    opacity: 1 !important;
    visibility: visible !important;
    min-height: 150px; /* Asegurar altura mínima */
    overflow: visible; /* Permitir contenido visible */
}

.piano-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.piano-header h3 {
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0 0 var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.piano-header h3 i {
    color: var(--primary-color);
    font-size: 1.3em;
    -webkit-text-fill-color: var(--primary-color);
    animation: pianoIcon 2s ease-in-out infinite;
}

@keyframes pianoIcon {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.piano-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
    opacity: 0.8;
}

/* Estilos para el toggle de modo */
.piano-mode-section {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.piano-mode-toggle {
    display: inline-flex;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    padding: 4px;
    margin-bottom: var(--spacing-sm);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.mode-btn {
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 46px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.mode-btn:hover {
    color: var(--text-primary);
    transform: translateY(-1px);
}

.mode-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 
        0 4px 12px rgba(var(--primary-rgb), 0.3),
        0 2px 6px rgba(var(--primary-rgb), 0.2);
}

.mode-description {
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    margin: 0;
    opacity: 0.7;
    font-style: italic;
}

.piano-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.current-chord-display {
    text-align: center;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.chord-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.chord-name {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    font-weight: 700;
    margin: 0 var(--spacing-sm);
}

.chord-notes {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-style: italic;
}

.piano-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.piano-actions button {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    border: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    min-width: 120px;
    justify-content: center;
}

.piano-actions .btn-primary {
    background: var(--primary-color);
    color: white;
}

.piano-actions .btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.piano-actions .btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.piano-actions .btn-secondary:hover:not(:disabled) {
    background: var(--border-color);
    transform: translateY(-1px);
}

.piano-actions button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.piano-actions button.success {
    background: var(--success-color) !important;
    color: white !important;
}

/* Piano Keyboard Styles - 4 octavas completas */
.piano-keyboard {
    position: relative;
    margin: var(--spacing-lg) 0;
    height: 180px;
    background: #2c2c2c;
    border-radius: var(--border-radius-lg);
    overflow-x: auto; /* Solo scroll horizontal en este contenedor */
    overflow-y: hidden; /* Sin scroll vertical */
    border: 3px solid #1a1a1a;
    box-shadow: 
        inset 0 2px 4px rgba(0,0,0,0.2),
        0 4px 12px rgba(0,0,0,0.15);
    padding: 8px;
    width: 100%;
    max-width: 100%; /* Asegurar que no exceda el contenedor padre */
    -webkit-overflow-scrolling: touch;
    display: block !important; /* Forzar visualización */
    visibility: visible !important;
    contain: layout style; /* Contener el scroll solo a este elemento */
}

/* Estilos para scrollbar del piano */
.piano-keyboard::-webkit-scrollbar {
    height: 8px;
}

.piano-keyboard::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
}

.piano-keyboard::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
    transition: background 0.3s ease;
}

.piano-keyboard::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.white-keys-container {
    display: flex;
    height: 100%;
    position: relative;
    gap: 1px;
    min-width: 320px; /* Ancho base mínimo para móviles */
    max-width: none; /* Sin límite máximo */
    padding-right: 10px;
    flex-shrink: 0; /* No permitir que se encoja */
    width: auto; /* Ancho automático basado en contenido */
}

.black-keys-container {
    position: absolute;
    top: 8px;
    left: 8px;
    height: 65%;
    width: calc(100% - 16px);
    display: flex;
    pointer-events: none;
    z-index: 2;
}

.piano-key {
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    user-select: none;
    font-size: 10px;
    font-weight: 600;
}

.white-key {
    flex: 1;
    background: linear-gradient(to bottom, #ffffff, #f8f8f8);
    border: 1px solid #ddd;
    border-radius: 0 0 4px 4px;
    padding-bottom: 6px;
    box-shadow: 
        0 1px 3px rgba(0,0,0,0.1),
        inset 0 1px 1px rgba(255,255,255,0.8);
    min-height: 100%;
    min-width: 0; /* Permite que las teclas se estrechen */
}

.white-key:hover {
    background: linear-gradient(to bottom, #f0f8ff, #e8f4ff);
    transform: translateY(2px);
    box-shadow: 
        0 0 6px rgba(0,0,0,0.15),
        inset 0 1px 1px rgba(255,255,255,0.9);
}

.white-key.selected {
    background: linear-gradient(to bottom, 
        rgba(255,255,255,1), 
        rgba(59, 130, 246, 0.15), 
        rgba(59, 130, 246, 0.25)) !important;
    color: var(--primary-color);
    box-shadow: 
        inset 0 0 30px rgba(59, 130, 246, 0.6),
        inset 0 0 15px rgba(59, 130, 246, 0.8),
        0 0 25px rgba(59, 130, 246, 0.8),
        0 0 50px rgba(59, 130, 246, 0.4);
    transform: translateY(1px);
    animation: neon-glow-blue 2s ease-in-out infinite alternate;
    border: none;
}

.black-key {
    width: 18px;
    background: linear-gradient(to bottom, #2a2a2a, #0f0f0f);
    color: white;
    border-radius: 0 0 3px 3px;
    pointer-events: all;
    padding-bottom: 4px;
    box-shadow: 
        0 2px 6px rgba(0,0,0,0.4),
        inset 0 1px 1px rgba(255,255,255,0.1);
    border: 1px solid #000;
    height: 100%;
    position: absolute;
}

.black-key:hover {
    background: linear-gradient(to bottom, #3a3a3a, #1f1f1f);
    transform: translateY(1px);
    box-shadow: 
        0 1px 4px rgba(0,0,0,0.5),
        inset 0 1px 1px rgba(255,255,255,0.15);
}

.black-key.selected {
    background: linear-gradient(to bottom, 
        rgba(59, 130, 246, 0.3), 
        rgba(30,30,30,1), 
        rgba(59, 130, 246, 0.2)) !important;
    color: rgba(59, 130, 246, 1);
    box-shadow: 
        inset 0 0 25px rgba(59, 130, 246, 0.8),
        inset 0 0 12px rgba(59, 130, 246, 1),
        0 0 20px rgba(59, 130, 246, 0.9),
        0 0 40px rgba(59, 130, 246, 0.5);
    transform: translateY(1px);
    animation: neon-glow-blue-dark 2s ease-in-out infinite alternate;
    border: none;
}

.key-label {
    font-size: 9px;
    font-weight: 600;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
    text-align: center;
    white-space: nowrap;
    text-shadow: 0 1px 1px rgba(0,0,0,0.3);
}

.white-key .key-label {
    color: #666;
    text-shadow: 0 1px 1px rgba(255,255,255,0.8);
}

.black-key .key-label {
    color: #ccc;
    text-shadow: 0 1px 1px rgba(0,0,0,0.8);
}

.piano-key:hover .key-label,
.piano-key.selected .key-label {
    opacity: 1;
    font-weight: 700;
}

.white-key.selected .key-label,
.black-key.selected .key-label {
    font-weight: 900;
    text-shadow: 
        0 0 8px rgba(255,255,255,1),
        0 0 16px currentColor,
        0 0 24px currentColor;
    transform: scale(1.15);
    animation: text-glow 2s ease-in-out infinite alternate;
}

@keyframes text-glow {
    0% { 
        text-shadow: 
            0 0 8px rgba(255,255,255,1),
            0 0 16px currentColor,
            0 0 24px currentColor;
    }
    100% { 
        text-shadow: 
            0 0 12px rgba(255,255,255,1),
            0 0 24px currentColor,
            0 0 36px currentColor,
            0 0 48px currentColor;
    }
}

/* Estilos para modo tiempo real */
.white-key.realtime {
    background: linear-gradient(180deg, 
        #e8f4fd 0%,
        #bee3f8 50%,
        #90cdf4 100%);
    border-color: #3182ce;
    transform: scale(0.98);
}

.black-key.realtime {
    background: linear-gradient(180deg, 
        #4a5568 0%,
        #2d3748 50%,
        #1a202c 100%);
    border-color: #2b6cb0;
    transform: scale(0.98);
}

.piano-key.playing {
    animation: keyPress 0.2s ease-out;
}

@keyframes keyPress {
    0% { 
        transform: scale(1) translateY(0);
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    50% { 
        transform: scale(0.95) translateY(2px);
        box-shadow: 0 1px 2px rgba(0,0,0,0.2);
    }
    100% { 
        transform: scale(1) translateY(0);
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
}

/* Animaciones de pulso para teclas seleccionadas */
@keyframes neon-glow-blue {
    0% { 
        box-shadow: 
            inset 0 0 30px rgba(59, 130, 246, 0.6),
            inset 0 0 15px rgba(59, 130, 246, 0.8),
            0 0 25px rgba(59, 130, 246, 0.8),
            0 0 50px rgba(59, 130, 246, 0.4);
    }
    100% { 
        box-shadow: 
            inset 0 0 40px rgba(59, 130, 246, 0.9),
            inset 0 0 20px rgba(59, 130, 246, 1),
            0 0 35px rgba(59, 130, 246, 1),
            0 0 70px rgba(59, 130, 246, 0.6);
    }
}

@keyframes neon-glow-blue-dark {
    0% { 
        box-shadow: 
            inset 0 0 25px rgba(59, 130, 246, 0.8),
            inset 0 0 12px rgba(59, 130, 246, 1),
            0 0 20px rgba(59, 130, 246, 0.9),
            0 0 40px rgba(59, 130, 246, 0.5);
    }
    100% { 
        box-shadow: 
            inset 0 0 35px rgba(59, 130, 246, 1),
            inset 0 0 18px rgba(59, 130, 246, 1),
            0 0 30px rgba(59, 130, 246, 1),
            0 0 60px rgba(59, 130, 246, 0.7);
    }
}

/* Piano Tips */
.piano-tips {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.tip-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--primary-color);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.tip-item i {
    color: var(--primary-color);
    font-size: var(--font-size-md);
    min-width: 16px;
}

/* Ready for real ads */
.ad-real {
    border: none;
    background: transparent;
    padding: 0;
    min-height: auto;
}

.ad-real:hover {
    transform: none;
    box-shadow: none;
    background: transparent;
    border-color: transparent;
}

/* ===== TEMPO CONTROLS ===== */
/* Contenedor unificado de controles - Estilo mejorado */
.progression-controls-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: linear-gradient(145deg, var(--bg-tertiary), var(--bg-secondary));
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
}

.progression-controls-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 12px 12px 0 0;
}

/* Controles de reproducción - Diseño mejorado */
.playback-controls {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

/* Estilos para controles flotantes */
.playback-controls.floating {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    background: linear-gradient(135deg, rgba(20, 20, 30, 0.95), rgba(30, 30, 45, 0.95));
    backdrop-filter: blur(20px);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 20px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.6),
        0 8px 20px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.15),
        inset 0 -1px 0 rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.15);
    gap: var(--spacing-sm);
    animation: floatInBottom 0.4s ease-out;
    cursor: move;
    user-select: none;
    /* Dimensiones para mantener una fila horizontal */
    min-width: 400px;
    max-width: 600px;
    width: auto;
    height: 70px;
    /* Flexbox para fila horizontal única */
    display: flex;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    /* Touch improvements para móvil */
    touch-action: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    /* Asegurar que no se rompa en pantallas pequeñas */
    overflow: visible;
}

.playback-controls.floating:hover {
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.7),
        0 10px 25px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.2),
        inset 0 -1px 0 rgba(0, 0, 0, 0.4);
}

.playback-controls.floating.dragging {
    /* Remover transform para evitar conflictos con posicionamiento absoluto */
    transform: none !important;
    transition: none !important;
    box-shadow: 
        0 30px 60px rgba(0, 0, 0, 0.8),
        0 15px 30px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.25);
    /* Efecto visual de arrastre más sutil */
    rotate: 1deg;
    scale: 1.02;
    /* Evitar cambios de layout durante drag */
    position: fixed !important;
    width: auto !important;
    height: auto !important;
    /* Cursor más claro */
    cursor: grabbing !important;
    /* Prevenir selección de texto durante drag */
    -webkit-user-select: none !important;
    user-select: none !important;
    pointer-events: auto !important;
}

.playback-controls.floating button {
    min-width: 50px;
    max-width: 60px;
    height: 50px;
    padding: var(--spacing-xs);
    font-size: var(--font-size-xs);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    /* Mejorar touch targets para móvil */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    /* Evitar que interfieran con el drag del contenedor */
    pointer-events: auto;
    position: relative;
    z-index: 1;
    /* Evitar shrinking en flexbox */
    flex-shrink: 0;
    /* Texto más compacto */
    white-space: nowrap;
    overflow: hidden;
}

.playback-controls.floating button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.playback-controls.floating button span {
    font-size: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    line-height: 1;
    text-align: center;
}

.playback-controls.floating .btn-float-toggle {
    position: absolute;
    top: -15px;
    right: 15px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 8px;
    box-shadow: 
        0 6px 20px rgba(59, 130, 246, 0.4),
        0 3px 10px rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.playback-controls.floating .btn-float-toggle:hover {
    transform: scale(1.1) rotate(180deg);
    box-shadow: 
        0 8px 25px rgba(59, 130, 246, 0.6),
        0 4px 15px rgba(0, 0, 0, 0.4);
}

@keyframes floatInBottom {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

/* Estilo para el botón toggle */
.btn-float-toggle {
    background: linear-gradient(135deg, var(--surface-color), rgba(255, 255, 255, 0.1)) !important;
    color: var(--text-secondary) !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.btn-float-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.btn-float-toggle:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color)) !important;
    color: white !important;
    transform: scale(1.05) rotate(5deg);
    box-shadow: 
        0 8px 25px rgba(59, 130, 246, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-float-toggle:hover::before {
    left: 100%;
}

/* Controles de tempo y compás - Grid mejorado con proporciones ajustadas */
.tempo-controls {
    display: grid;
    grid-template-columns: 1fr 2fr;  /* Compás más corto, BPM más largo */
    gap: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.time-signature-setting,
.bpm-setting {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
    background: var(--bg-primary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Ajustes específicos de tamaño */
.time-signature-setting {
    padding: var(--spacing-md);  /* Menos padding para contenedor más compacto */
    grid-column: 1;
}

.bpm-setting {
    padding: var(--spacing-lg);  /* Más padding para contenedor más amplio */
    grid-column: 2;
}

.time-signature-setting:hover,
.bpm-setting:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.2);
    border-color: var(--primary-color);
}

.time-signature-setting label,
.bpm-setting label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bpm-setting input[type="range"] {
    width: 350px;  /* Slider extra largo para máximo aprovechamiento del contenedor */
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--bg-secondary), var(--bg-tertiary));
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    margin: var(--spacing-sm) 0;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.bpm-setting input[type="range"]:hover {
    background: linear-gradient(90deg, var(--bg-tertiary), var(--primary-color));
}

.bpm-setting input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--primary-color), var(--primary-dark));
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(var(--primary-rgb), 0.4);
    transition: all var(--transition-fast);
    border: 2px solid white;
}

.bpm-setting input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.6);
}

.bpm-value {
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    min-width: 60px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.time-signature-setting select {
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    min-width: 100px;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.time-signature-setting select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.2);
}

.time-signature-setting select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.2);
}

.metronome-setting label {
    flex-direction: row;
    align-items: center;
    cursor: pointer;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    transition: all var(--transition-fast);
    min-width: 120px;
    justify-content: center;
}

.metronome-setting label:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
}

.metronome-setting input[type="checkbox"] {
    margin-right: var(--spacing-xs);
}

.metronome-setting input[type="checkbox"]:checked + i {
    color: var(--primary-color);
}

/* ===== HELP SYSTEM ===== */

/* ===== HELP SYSTEM MODERN STYLES ===== */
.help-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(10px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.help-modal.show {
    opacity: 1;
}

.help-modal-content {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border-radius: 24px;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 1200px;
    width: 95%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    transform: scale(0.8) translateY(50px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.help-modal.show .help-modal-content {
    transform: scale(1) translateY(0);
}

.help-header {
    padding: 24px 32px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.help-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.help-header h2 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
    font-weight: 700;
    font-size: 24px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

.help-header h2 i {
    font-size: 28px;
    opacity: 0.9;
}

.help-close-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
}

.help-close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.help-close-btn i {
    font-size: 18px;
}

.help-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.help-sidebar {
    width: 320px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    position: relative;
}

.help-sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.help-nav {
    flex: 1;
    padding: 24px 20px;
    overflow-y: auto;
}

.help-nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    text-align: left;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 8px;
    font-size: 15px;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.help-nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.help-nav-item:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    transform: translateX(4px);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.help-nav-item.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 
        0 8px 25px rgba(99, 102, 241, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transform: translateX(8px) scale(1.02);
}

.help-nav-item.active::before {
    opacity: 1;
}

.help-nav-item i {
    font-size: 18px;
    width: 20px;
    text-align: center;
    opacity: 0.8;
    position: relative;
    z-index: 1;
}

.help-nav-item span {
    position: relative;
    z-index: 1;
}

.help-content {
    flex: 1;
    overflow-y: auto;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
}

.help-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 20% 80%, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.help-section-content {
    padding: 32px 40px;
    line-height: 1.6;
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

.help-section-content h3 {
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.help-section-content h4 {
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
    margin: 32px 0 16px 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.help-section-content h4 i {
    color: var(--primary-color);
    font-size: 22px;
}

.help-section-content h5 {
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    margin: 24px 0 12px 0;
}

.help-section-content p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 16px;
}

.help-section-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.help-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.help-contact h4 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.help-contact p {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.help-contact a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    text-decoration: none;
    font-size: var(--font-size-xs);
    transition: color var(--transition-fast);
}

.help-contact a:hover {
    color: var(--primary-dark);
}

/* Help Content Styles */
.help-intro h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.feature-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        0 0 20px rgba(255, 140, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 
        0 12px 40px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(255, 140, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.feature-card i {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.feature-card h4 {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text-primary);
}

.feature-card p {
    margin: 0;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.quick-start {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-lg);
}

.quick-start h4 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--primary-color);
}

.quick-start ol {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.quick-start li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.help-tips {
    margin: var(--spacing-lg) 0;
}

.tip {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.tip i {
    color: var(--accent-color);
    margin-top: 2px;
}

/* Terms of Use Section Styles */
.terms-section {
    font-family: var(--font-primary);
}

.terms-intro {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.free-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.free-badge i {
    font-size: var(--font-size-xl);
    color: #f39c12;
}

.terms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.terms-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.terms-card.allowed {
    border-color: var(--success-color);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        0 0 20px rgba(46, 213, 115, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.terms-card.restricted {
    border-color: var(--warning-color);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        0 0 20px rgba(255, 195, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.terms-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.terms-card.allowed .terms-header i {
    color: var(--success-color);
    font-size: var(--font-size-lg);
}

.terms-card.restricted .terms-header i {
    color: var(--warning-color);
    font-size: var(--font-size-lg);
}

.terms-header h4 {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-size-md);
}

.terms-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.terms-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.terms-list li i {
    width: 16px;
    text-align: center;
    opacity: 0.7;
}

.terms-warranty,
.terms-modifications {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin: var(--spacing-md) 0;
    border-left: 4px solid var(--info-color);
}

.terms-warranty h4,
.terms-modifications h4 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
    font-size: var(--font-size-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.terms-warranty p,
.terms-modifications p {
    margin: 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.terms-contact {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
}

.terms-contact h4 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.contact-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-item i {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.contact-item span {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.contact-item small {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
}

.terms-footer {
    text-align: center;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.terms-footer p {
    margin: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.terms-footer strong {
    color: var(--primary-color);
}

/* Help Content Modern Styles */
.help-subsection {
    margin: 32px 0;
    padding: 24px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.help-subsection h4 {
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
}

.help-subsection h4 i {
    color: var(--primary-color);
    font-size: 20px;
}

.help-tip {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-top: 24px;
    padding: 20px;
    background: linear-gradient(135deg, 
        rgba(99, 102, 241, 0.1) 0%, 
        rgba(6, 182, 212, 0.05) 100%);
    border-radius: 16px;
    border-left: 4px solid var(--secondary-color);
    border: 1px solid rgba(6, 182, 212, 0.2);
    position: relative;
    overflow: hidden;
}

.help-tip::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.help-tip i {
    color: var(--secondary-color);
    margin-top: 2px;
    font-size: 18px;
    position: relative;
    z-index: 1;
}

.help-tip div {
    flex: 1;
    position: relative;
    z-index: 1;
}

.help-tip strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Modern Grid for Cards */
.simple-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.simple-card {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.05) 0%, 
        rgba(255, 255, 255, 0.02) 100%);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.simple-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.simple-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

.simple-card:hover::before {
    opacity: 0.05;
}

.simple-card h5 {
    margin: 0 0 12px 0;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.simple-card p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    position: relative;
    z-index: 1;
}

/* Terms Section Simplified */
.terms-section {
    font-family: inherit;
}

.terms-intro {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    text-align: center;
}

.free-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 18px;
    margin-bottom: 15px;
}

.free-badge i {
    font-size: 24px;
    color: #ffc107;
}

.terms-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.terms-allowed,
.terms-restricted {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    border: 2px solid transparent;
}

.terms-allowed {
    border-color: var(--success-color);
}

.terms-restricted {
    border-color: var(--warning-color);
}

.terms-allowed h4,
.terms-restricted h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 16px;
}

.terms-allowed h4 i {
    color: var(--success-color);
    font-size: 18px;
}

.terms-restricted h4 i {
    color: var(--warning-color);
    font-size: 18px;
}

.terms-allowed ul,
.terms-restricted ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.terms-allowed li,
.terms-restricted li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.terms-allowed li i,
.terms-restricted li i {
    width: 16px;
    text-align: center;
    opacity: 0.7;
}

.terms-legal {
    background: var(--bg-card);
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 4px solid var(--secondary-color);
    border: 1px solid var(--border-color);
}

.terms-legal h4 {
    margin: 0 0 10px 0;
    color: var(--text-primary);
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.terms-legal p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.terms-contact {
    background: var(--bg-card);
    padding: 20px;
    border-radius: 12px;
    margin: 20px 0;
    border: 1px solid var(--border-color);
}

.terms-contact h4 {
    margin: 0 0 15px 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
}

.contact-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    background: var(--bg-tertiary);
}

.contact-item i {
    font-size: 18px;
    color: var(--primary-color);
}

.contact-item div strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 4px;
    font-size: 14px;
}

.contact-item div small {
    color: var(--text-secondary);
    font-size: 12px;
}

.terms-footer {
    text-align: center;
    padding: 20px;
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.terms-footer p {
    margin: 4px 0;
    color: var(--text-secondary);
}

.terms-footer strong {
    color: var(--primary-color);
}

/* Responsive adjustments */
/* Controls and Settings Modern Styles */
.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.control-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.05) 0%, 
        rgba(255, 255, 255, 0.02) 100%);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.control-item:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.control-icon {
    font-size: 28px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    flex-shrink: 0;
}

.control-item strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 8px;
    font-size: 16px;
    font-weight: 600;
}

.control-item p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.settings-list {
    margin: 24px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.setting-item {
    padding: 20px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.05) 0%, 
        rgba(255, 255, 255, 0.02) 100%);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.setting-item:hover {
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.setting-item strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 12px;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-item p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

/* Export Formats Modern Grid */
.export-formats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin: 32px 0;
}

.format-card {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.06) 0%, 
        rgba(255, 255, 255, 0.02) 100%);
    padding: 28px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(15px);
    position: relative;
    overflow: hidden;
}

.format-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.format-card:hover {
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

.format-card:hover::before {
    opacity: 0.05;
}

.format-icon {
    font-size: 48px;
    text-align: center;
    margin-bottom: 20px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px;
    position: relative;
    z-index: 1;
}

.format-card h5 {
    margin: 0 0 16px 0;
    color: var(--text-primary);
    text-align: center;
    font-size: 20px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.format-card > p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 24px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.format-uses {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    position: relative;
    z-index: 1;
}

.format-uses strong {
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    display: block;
    margin-bottom: 12px;
}

.format-uses ul {
    margin: 8px 0 0 0;
    padding-left: 20px;
    list-style-type: none;
}

.format-uses li {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
    position: relative;
    padding-left: 16px;
}

.format-uses li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Help Steps Modern Styles */
.help-steps {
    margin: 24px 0;
    padding-left: 0;
    list-style: none;
    counter-reset: step-counter;
}

.help-steps li {
    counter-increment: step-counter;
    margin-bottom: 16px;
    padding: 16px 20px 16px 60px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.05) 0%, 
        rgba(255, 255, 255, 0.02) 100%);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
    transition: all 0.3s ease;
}

.help-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.help-steps li:hover {
    transform: translateX(4px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Keyboard Shortcuts Styles */
.shortcuts-table {
    display: grid;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
}

.shortcut-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.shortcut-row::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(147, 51, 234, 0.05), 
        rgba(79, 70, 229, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.shortcut-row:hover {
    transform: translateY(-2px);
    border-color: rgba(147, 51, 234, 0.3);
    box-shadow: 0 8px 32px rgba(147, 51, 234, 0.1);
}

.shortcut-row:hover::before {
    opacity: 1;
}

.shortcut-key {
    background: linear-gradient(135deg, 
        var(--accent-color), 
        #8b5cf6);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
    font-weight: 700;
    min-width: 100px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(147, 51, 234, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

.shortcut-key::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1), 
        rgba(255, 255, 255, 0.05));
    border-radius: var(--border-radius);
}

.shortcut-description {
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    flex: 1;
    margin-left: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* Version Cards Styles */
.version-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, 
        var(--bg-card), 
        rgba(147, 51, 234, 0.05));
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    margin: var(--spacing-lg) 0;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.version-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(147, 51, 234, 0.05), 
        rgba(79, 70, 229, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.version-card:hover {
    transform: translateY(-4px);
    border-color: rgba(147, 51, 234, 0.3);
    box-shadow: 0 12px 48px rgba(147, 51, 234, 0.15);
}

.version-card:hover::before {
    opacity: 1;
}

.version-card.current {
    border-color: var(--success-color);
    background: linear-gradient(135deg, 
        var(--bg-card), 
        rgba(34, 197, 94, 0.1));
    box-shadow: 0 8px 32px rgba(34, 197, 94, 0.2);
}

.version-card.current::before {
    background: linear-gradient(45deg, 
        rgba(34, 197, 94, 0.1), 
        rgba(34, 197, 94, 0.05));
}

.version-icon {
    font-size: 3rem;
    text-align: center;
    min-width: 80px;
    background: linear-gradient(135deg, 
        var(--accent-color), 
        #8b5cf6);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    text-shadow: 0 2px 4px rgba(147, 51, 234, 0.3);
    position: relative;
    z-index: 1;
}

.version-info {
    flex: 1;
    position: relative;
    z-index: 1;
}

.version-info h5 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.version-info p {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.version-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.feature-tag {
    background: linear-gradient(135deg, 
        var(--primary-color), 
        #6366f1);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.feature-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent);
    transition: left 0.5s ease;
}

.feature-tag:hover::before {
    left: 100%;
}

.future-versions {
    display: grid;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.future-version {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, 
        var(--bg-card), 
        rgba(147, 51, 234, 0.03));
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-color);
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.future-version::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(147, 51, 234, 0.05), 
        rgba(79, 70, 229, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.future-version:hover {
    transform: translateY(-2px);
    border-color: rgba(147, 51, 234, 0.3);
    box-shadow: 0 8px 32px rgba(147, 51, 234, 0.1);
}

.future-version:hover::before {
    opacity: 1;
}

.future-icon {
    font-size: 2.5rem;
    text-align: center;
    min-width: 60px;
    background: linear-gradient(135deg, 
        var(--accent-color), 
        #8b5cf6);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    position: relative;
    z-index: 1;
}

.future-version h5 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
    font-size: var(--font-size-md);
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.future-version p {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.eta {
    background: linear-gradient(135deg, 
        var(--accent-color), 
        #8b5cf6);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 700;
    display: inline-block;
    box-shadow: 0 2px 8px rgba(147, 51, 234, 0.3);
    position: relative;
    z-index: 1;
}

/* Troubleshooting Styles */
.troubleshooting-item {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--warning-color);
}

.issue-title {
    margin-bottom: var(--spacing-sm);
}

.issue-title strong {
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.issue-solutions p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0 0 var(--spacing-xs) 0;
}

.issue-solutions ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.issue-solutions li {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

.support-options {
    margin: var(--spacing-md) 0;
}

.support-option {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.support-option i {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    margin-top: 2px;
}

.support-option strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.support-option p {
    margin: 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}



.chord-types {
    margin: var(--spacing-md) 0;
}

.chord-type {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.chord-example {
    font-weight: 600;
    color: var(--primary-color);
    font-family: monospace;
}

.chord-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.progression-help h4 {
    color: var(--primary-color);
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
}

.popular-progressions {
    margin: var(--spacing-md) 0;
}

.progression-example {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.progression-example strong {
    color: var(--primary-color);
}

.progression-chords {
    display: block;
    font-family: monospace;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin: var(--spacing-xs) 0;
}

.progression-example p {
    margin: var(--spacing-xs) 0 0 0;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.controls-help {
    margin: var(--spacing-lg) 0;
}

.control-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.control-item i {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    margin-top: var(--spacing-xs);
}

.control-item strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.control-item p {
    margin: 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.shortcut-category h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xs);
}

kbd {
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: var(--font-size-xs);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.plans-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.plan-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    position: relative;
}

.plan-card.popular {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.plan-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.plan-header h4 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
}

.plan-price {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.feature.limitation {
    color: var(--text-muted);
    opacity: 0.6;
}

.troubleshooting-list {
    margin: var(--spacing-lg) 0;
}

.problem-solution {
    margin-bottom: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.problem {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--error-color);
    color: white;
    font-weight: 600;
}

.solution {
    padding: var(--spacing-md);
}

.solution h5 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
}

.solution ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.solution li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.browser-compatibility {
    margin: var(--spacing-xl) 0;
}

.browser-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.browser-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.browser-item i {
    font-size: var(--font-size-lg);
}

.browser-item.compatible .status {
    color: var(--success-color);
}

.browser-item.partial .status {
    color: var(--warning-color);
}

.contact-support {
    margin: var(--spacing-xl) 0;
    text-align: center;
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}

.contact-options {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-md);
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.contact-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ===== OVERLAYS ===== */
.audio-warning {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.warning-content {
    background: var(--bg-card);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
}

.warning-content i {
    font-size: var(--font-size-3xl);
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
}

.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 20, 25, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9998;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-tertiary);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

/* ===== EXPORT MODAL ===== */
.export-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.export-modal.show {
    opacity: 1;
}

.export-modal .modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.export-modal .modal-content {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 40px rgba(255, 140, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease-in-out;
}

.export-modal.show .modal-content {
    transform: scale(1);
}

.export-modal .modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--glass-border);
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        rgba(255, 255, 255, 0.05) 100%);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.export-modal .modal-header h3 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
}

.modal-close {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
    font-size: 18px;
    font-weight: 600;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.5);
}

.modal-close:active {
    transform: rotate(90deg) scale(0.95);
}

.export-modal .modal-body {
    padding: var(--spacing-lg);
}

.export-modal .modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* Export Preview */
.export-preview {
    margin-bottom: var(--spacing-xl);
}

.export-preview h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.progression-preview {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.preview-header {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.preview-chords {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.preview-chord {
    background: var(--bg-tertiary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: center;
    min-width: 60px;
}

.chord-number {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.chord-name {
    display: block;
    font-weight: 600;
    color: var(--primary-color);
}

/* Format Grid */
.format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.format-option {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.format-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.format-option.selected {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.format-option.premium {
    border-color: var(--accent-color);
}

.format-option i {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.format-option.premium i {
    color: var(--accent-color);
}

.format-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.format-desc {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.format-price {
    font-weight: 600;
    color: var(--success-color);
}

.format-option.premium .format-price {
    color: var(--accent-color);
}

.premium-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 600;
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.setting-item label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.setting-item input,
.setting-item select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
}

/* Botones con efecto glassmorphism y neón */
.btn-primary,
.btn-secondary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: var(--border-glass);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    backdrop-filter: var(--backdrop-blur);
    box-shadow: var(--shadow-neon);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: var(--border-glass);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-neon-strong);
    border-color: var(--neon-orange);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
}

.btn-primary.premium {
    background: var(--accent-color);
}

.btn-primary.premium:hover {
    background: #d97706;
}

/* Tutorial Tooltips */
.tutorial-tooltip {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-lg);
    max-width: 300px;
    z-index: 10000;
}

.tutorial-content h4 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--primary-color);
}

.tutorial-content p {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-secondary);
    line-height: 1.5;
}

.tutorial-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.step-counter {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.tutorial-nav button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    cursor: pointer;
    margin-left: var(--spacing-xs);
}

.btn-prev {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

/* ===== ANIMACIONES ===== */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes slideIn {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    opacity: 1;
    transition: opacity 0.5s ease-out;
}

.loading-screen.fade-out {
    opacity: 0;
}

.loading-content {
    text-align: center;
    max-width: 400px;
    padding: var(--spacing-xl);
}

.loading-logo {
    margin-bottom: var(--spacing-xl);
}

.logo-image {
    height: 80px;
    width: auto;
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-xl);
    animation: logoFloat 3s ease-in-out infinite;
}

.loading-logo h2 {
    color: var(--text-primary);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin: 0 0 var(--spacing-xs) 0;
    letter-spacing: -0.025em;
}

.by-semo {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 400;
    opacity: 0.8;
}

.loading-progress {
    width: 100%;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
    animation: progressGlow 2s ease-in-out infinite;
}

.loading-status {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    margin: 0 0 var(--spacing-xs) 0;
    opacity: 0.9;
}

.loading-percentage {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

/* ===== TOUR MODAL ===== */
.tour-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10002;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tour-modal.show {
    opacity: 1;
}

.tour-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.tour-content {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    animation: slideInUp 0.4s ease-out;
}

.tour-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.tour-header h2 {
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0;
}

.tour-skip {
    background: none;
    border: none;
    color: white;
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.tour-skip:hover {
    background: rgba(255, 255, 255, 0.1);
}

.tour-body {
    padding: var(--spacing-xl);
}

.tour-step {
    display: none;
    text-align: center;
}

.tour-step.active {
    display: block;
    animation: fadeInUp 0.3s ease-out;
}

.tour-icon {
    margin-bottom: var(--spacing-lg);
}

.tour-icon i {
    font-size: 4rem;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tour-step h3 {
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0 0 var(--spacing-md) 0;
}

.tour-step p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin: 0 0 var(--spacing-xl) 0;
}

.tour-navigation {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.tour-navigation button {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

@keyframes logoFloat {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg);
    }
    50% { 
        transform: translateY(-10px) rotate(2deg);
    }
}

@keyframes progressGlow {
    0%, 100% { 
        box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
    }
    50% { 
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.6);
    }
}

@keyframes slideInUp {
    0% {
        transform: translateY(30px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeInUp {
    0% {
        transform: translateY(20px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ===== RESET TOUR BUTTON ===== */
.reset-tour-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    width: 100%;
    justify-content: center;
}

.reset-tour-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.reset-tour-btn i {
    font-size: var(--font-size-sm);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

@media (max-width: 430px) {
    .chord-palette,
    .progression-builder,
    .preset-progressions,
    .live-preview {
        padding: var(--spacing-md);
    }
    
    .progression-slots {
        grid-template-columns: 1fr;
    }
    
    .progression-controls {
        grid-template-columns: 1fr;
    }
    
    .preset-actions {
        flex-direction: column;
    }
}

/* ===== CONFIRMATION MODAL ===== */
.confirmation-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.confirmation-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.confirmation-content {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    min-width: 400px;
    max-width: 500px;
    position: relative;
    z-index: 1;
    animation: confirmationSlideIn 0.3s ease-out;
}

.confirmation-header {
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.confirmation-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.confirmation-body {
    padding: var(--spacing-lg);
}

.confirmation-body p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: var(--font-size-md);
}

.confirmation-actions {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.btn-danger {
    background: linear-gradient(145deg, var(--error-color), #dc3545);
    border: none;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(145deg, #dc3545, #b02a37);
}

.btn-danger:active {
    transform: translateY(0);
}

@keyframes confirmationSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}



/* ===== MODAL DE CUENTA ===== */
.account-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.account-modal.show {
    opacity: 1;
}

.account-modal-content {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}

.account-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-light);
}

.account-header h2 {
    margin: 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.account-body {
    padding: 1.5rem;
}

.app-logo {
    text-align: center;
    margin-bottom: 1rem;
}

.app-logo img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    margin-bottom: 0.75rem;
    border-radius: var(--border-radius);
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.app-logo h3 {
    margin: 0.25rem 0 0.25rem 0;
    color: var(--text-primary);
}

.version {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

.app-stats h4,
.platform-info h4,
.app-features h4,
.support-section h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed);
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.platform-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 1rem 0;
}

.platform-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-speed);
}

.platform-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 0.5rem;
    margin: 1rem 0;
}

.feature-item {
    padding: 0.5rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    border: 1px solid var(--border-color);
}

.support-buttons {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
    flex-wrap: wrap;
}

.support-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-sm);
    flex: 1;
    justify-content: center;
}

.support-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.support-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.support-section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* ===== NOTIFICACIONES ===== */
.notification {
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    line-height: 1.4;
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    max-width: 300px;
}

.notification-success {
    border-color: #4CAF50;
    background-color: #E8F5E8;
    color: #2E7D32;
}

/* ===== ORIENTACIÓN Y OPTIMIZACIONES MÓVILES ===== */

/* Optimizaciones específicas para landscape en móviles */
@media screen and (max-width: 768px) and (orientation: landscape) {
    .header {
        padding: var(--spacing-xs) 0;
    }
    
    body {
        padding-top: 60px;
    }
    
    .main-content {
        padding: var(--spacing-sm);
    }
    
    .piano-builder-zone {
        margin: var(--spacing-sm) 0;
        padding: var(--spacing-sm);
    }
    
    .piano-keyboard {
        height: 120px;
    }
    
    .chord-palette {
        padding: var(--spacing-sm);
    }
    
    .progression-builder {
        padding: var(--spacing-sm);
    }
    
    /* Hacer los controles más compactos */
    .progression-controls-container {
        padding: var(--spacing-sm);
    }
    
    .playback-controls {
        gap: var(--spacing-xs);
    }
    
    .playback-controls button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
}

/* Media query para dispositivos muy pequeños */
@media (max-width: 480px) {
    .header-content {
        padding: 0 var(--spacing-sm);
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .logo {
        font-size: var(--font-size-lg);
    }
    
    .header-controls {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .header-controls button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
}

.notification-error {
    border-color: #F44336;
    background-color: #FFEBEE;
    color: #C62828;
}

.notification-warning {
    border-color: #FF9800;
    background-color: #FFF3E0;
    color: #E65100;
}

/* ===== OPTIMIZACIONES MÓVILES CONSOLIDADAS ===== */
@media (max-width: 768px) {
    /* BODY Y LAYOUT BASE */
    body {
        padding-top: 40px; /* Header compacto siempre visible */
        overflow-x: hidden; /* CRÍTICO: No scroll horizontal en body para móviles */
        overflow-y: auto; /* Solo scroll vertical */
        min-width: 320px;
        max-width: 100vw; /* No exceder viewport */
    }
    
    /* HEADER ULTRA COMPACTO */
    .header {
        transition: transform 0.3s ease-out, opacity 0.3s ease-out;
        padding: 4px 0;
        z-index: 1000;
    }
    
    .header.hidden {
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
    }
    
    .header.visible {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .header-content {
        padding: 0 var(--spacing-sm); /* Menos padding lateral */
        align-items: center;
        justify-content: space-between;
    }
    
    .logo {
        font-size: var(--font-size-md); /* Más pequeño */
        gap: 4px; /* Gap mínimo */
    }
    
    .logo-icon {
        height: 22px; /* Icono más pequeño */
    }
    
    .by-semo {
        font-size: 10px; /* Texto mínimo */
        line-height: 1;
    }
    
    .header-controls {
        gap: 6px; /* Gap mínimo entre controles */
    }
    
    .header-controls button {
        padding: 4px 8px; /* Botones más compactos */
        font-size: var(--font-size-xs);
        min-height: 28px; /* Altura mínima */
    }
    
    /* MAIN CONTENT */
    .main-content {
        padding: var(--spacing-md);
        gap: var(--spacing-lg);
    }
    
    /* PIANO BUILDER - SIEMPRE VISIBLE Y FUNCIONAL */
    .piano-builder-zone {
        margin: var(--spacing-md) 0;
        padding: var(--spacing-md);
        min-height: 250px;
        display: block !important; /* Forzar visualización */
        opacity: 1 !important;
        visibility: visible !important;
        overflow: visible; /* Permitir que el contenido sea visible */
    }
    
    .piano-builder-container {
        width: 100%;
        overflow: visible; /* Permitir que el piano sea visible */
        display: block !important;
        min-height: 200px;
    }
    
    .piano-keyboard {
        height: 140px; /* Más compacto pero funcional */
        overflow-x: auto; /* SOLO el teclado tiene scroll horizontal */
        overflow-y: hidden; /* Sin scroll vertical */
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        scrollbar-color: var(--primary-color) transparent;
        margin: var(--spacing-sm) 0;
        width: 100%;
        max-width: 100%; /* No exceder el contenedor */
        position: relative;
        contain: layout style; /* Contener el scroll solo a este elemento */
        display: block !important;
        visibility: visible !important;
    }
    
    .piano-keyboard::-webkit-scrollbar {
        height: 6px;
    }
    
    .piano-keyboard::-webkit-scrollbar-track {
        background: rgba(255,255,255,0.1);
        border-radius: 3px;
    }
    
    .piano-keyboard::-webkit-scrollbar-thumb {
        background: var(--primary-color);
        border-radius: 3px;
    }
    
    .white-keys-container {
        min-width: 600px; /* Reducido para móviles - más manejable */
        max-width: none;
        flex-shrink: 0; /* No permitir encogimiento */
        display: flex !important;
        height: 100%;
        position: relative;
        gap: 1px;
    }
    
    .white-key {
        min-width: 40px;
        height: 100px; /* Más compacto */
    }
    
    .black-key {
        width: 20px;
        height: 65px; /* Proporcional */
        z-index: 5;
    }
    
    .piano-actions {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
        margin-top: var(--spacing-md);
    }
    
    .piano-actions button {
        min-width: 100%;
        max-width: 200px;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    /* CHORD PALETTE */
    .chord-grid {
        grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
        gap: var(--spacing-sm);
    }
    
    /* PROGRESSION BUILDER */
    .progression-slots {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .progression-controls {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .progression-info {
        grid-template-columns: 1fr;
    }
    
    /* PRESET MANAGER */
    .preset-progressions-inline .preset-selector-group {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .preset-progressions-inline .preset-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
        justify-content: stretch;
    }
    
    .preset-progressions-inline .btn-preset-load,
    .preset-progressions-inline .btn-preset-preview {
        flex: 1;
    }
    
    /* PLAYBACK CONTROLS */
    .playback-controls {
        gap: var(--spacing-xs);
    }
    
    .playback-controls button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
    
    /* CONTROLES FLOTANTES EN MÓVIL */
    .playback-controls.floating {
        /* Ajustar tamaño para móvil manteniendo fila horizontal */
        min-width: 320px;
        max-width: 85vw;
        padding: var(--spacing-sm) var(--spacing-md);
        bottom: 15px;
        height: 60px;
        gap: var(--spacing-xs);
        /* Cursor apropiado para touch */
        cursor: grab;
    }
    
    .playback-controls.floating.dragging {
        cursor: grabbing;
        /* Efecto más sutil en móvil */
        rotate: 0.5deg;
        scale: 1.01;
    }
    
    .playback-controls.floating button {
        /* Botones más compactos para móvil pero funcionales */
        min-width: 42px;
        max-width: 50px;
        height: 42px;
        font-size: 10px;
        padding: var(--spacing-xs);
    }
    
    .playback-controls.floating button span {
        font-size: 7px;
        letter-spacing: 0.2px;
    }
    
    .playback-controls.floating .btn-float-toggle {
        /* Toggle más accesible en móvil */
        width: 28px;
        height: 28px;
        top: -10px;
        right: 10px;
    }
    
    /* MODALES Y CONFIRMACIONES */
    .confirmation-content {
        min-width: 320px;
        max-width: 90vw;
        margin: var(--spacing-md);
    }
    
    .confirmation-actions {
        flex-direction: column;
    }
    
    .confirmation-actions button {
        width: 100%;
        justify-content: center;
    }
    
    /* TERMS AND CONTENT */
    .terms-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .terms-intro {
        padding: 15px;
    }
    
    .free-badge {
        font-size: 16px;
        flex-direction: column;
    }
    
    .chord-types-grid,
    .export-formats-grid {
        grid-template-columns: 1fr;
    }
    
    .control-item,
    .version-card,
    .future-version {
        flex-direction: column;
        text-align: center;
    }
    
    .version-features {
        justify-content: center;
    }
    
    .shortcuts-table .shortcut-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .shortcut-key {
        margin-right: 0;
    }
    
    .simple-grid {
        grid-template-columns: 1fr;
    }
    
    /* ADVERTISEMENT */
    .advertisement-zone {
        margin-top: var(--spacing-lg);
        padding: var(--spacing-md);
    }
}

/* OPTIMIZACIONES LANDSCAPE MÓVIL */
@media screen and (max-width: 768px) and (orientation: landscape) {
    body {
        padding-top: 45px; /* Aún más compacto en landscape */
    }
    
    .header {
        padding: 4px 0;
    }
    
    .main-content {
        padding: var(--spacing-sm);
    }
    
    .piano-builder-zone {
        margin: var(--spacing-sm) 0;
        padding: var(--spacing-sm);
    }
    
    .piano-keyboard {
        height: 120px; /* Máximo compacto en landscape */
    }
}

/* OPTIMIZACIÓN ESPECIAL PARA MÓVILES VERTICALES */
@media screen and (max-width: 768px) and (orientation: portrait) {
    /* FORZAR CONTENEDOR DE VIEWPORT */
    body {
        overflow-x: hidden !important;
        width: 100vw !important;
        max-width: 100vw !important;
    }
    
    .container {
        overflow-x: hidden !important;
        width: 100% !important;
        max-width: 100% !important;
    }
    
    /* PIANO BUILDER - Optimizado para vertical */
    .piano-builder-zone {
        margin: var(--spacing-sm) 0;
        padding: var(--spacing-sm);
        min-height: 300px; /* Más alto en vertical */
        overflow: hidden; /* CRÍTICO: Contener todo dentro */
    }
    
    .piano-builder-container {
        width: 100%;
        overflow: hidden; /* CRÍTICO: No permite overflow */
        max-width: 100%;
    }
    
    .piano-keyboard {
        height: 120px; /* Altura optimizada para vertical */
        overflow-x: auto; /* CRÍTICO: Scroll horizontal obligatorio */
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        scrollbar-color: var(--primary-color) rgba(255,255,255,0.2);
        margin: var(--spacing-sm) 0;
        width: 100%;
        max-width: 100%; /* CRÍTICO: No exceder viewport */
        border-radius: var(--border-radius-md);
        /* Scroll más visible y funcional */
        padding-bottom: 10px; /* Espacio para scrollbar */
    }
    
    .piano-keyboard::-webkit-scrollbar {
        height: 8px; /* Scrollbar más grueso para móvil */
        background: rgba(0,0,0,0.1);
        border-radius: 4px;
    }
    
    .piano-keyboard::-webkit-scrollbar-track {
        background: rgba(255,255,255,0.1);
        border-radius: 4px;
    }
    
    .piano-keyboard::-webkit-scrollbar-thumb {
        background: var(--primary-color);
        border-radius: 4px;
        border: 1px solid rgba(255,255,255,0.2);
    }
    
    .piano-keyboard::-webkit-scrollbar-thumb:hover {
        background: var(--primary-light);
    }
    
    .white-keys-container {
        min-width: 350px; /* ULTRA-COMPACTO: Ancho mínimo para portrait */
        max-width: none;
        flex-shrink: 0;
        display: flex !important;
        height: 100%;
        position: relative;
        gap: 2px; /* Más espacio entre teclas */
        padding-right: 20px; /* Espacio final para scroll */
    }
    
    .white-key {
        min-width: 28px; /* Ancho mínimo para teclas usables en móvil */
        flex: 0 0 28px; /* No se encogen, ancho fijo */
        height: 100%;
        border-radius: 0 0 6px 6px;
        font-size: 9px; /* Texto más pequeño pero legible */
        padding-bottom: 4px;
    }
    
    .black-key {
        min-width: 18px; /* Ancho fijo para teclas negras */
        flex: 0 0 18px;
        height: 65%;
        border-radius: 0 0 4px 4px;
        font-size: 8px;
    }
    
    .key-label {
        font-size: 8px;
        font-weight: 600;
        opacity: 0.7;
    }
    
    /* Controles del piano más compactos */
    .piano-controls {
        gap: var(--spacing-sm);
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .piano-actions {
        gap: var(--spacing-xs);
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .piano-actions button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
        min-height: 36px;
        flex: 1;
        min-width: 80px;
        max-width: 120px;
    }
    
    /* Información del acorde más compacta */
    .current-chord-display {
        text-align: center;
        padding: var(--spacing-xs);
        background: rgba(255,255,255,0.05);
        border-radius: var(--border-radius-sm);
        margin-bottom: var(--spacing-sm);
    }
    
    .chord-name {
        font-size: var(--font-size-lg);
        font-weight: 700;
        display: block;
        margin-bottom: 2px;
    }
    
    .chord-notes {
        font-size: var(--font-size-xs);
        opacity: 0.8;
    }
    
    /* Tips más compactos */
    .piano-tips {
        margin-top: var(--spacing-sm);
    }
    
    .tip-item {
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs);
        margin-bottom: var(--spacing-xs);
    }
    
    /* Header del piano más compacto */
    .piano-header h3 {
        font-size: var(--font-size-md);
        margin-bottom: var(--spacing-xs);
    }
    
    .piano-description {
        font-size: var(--font-size-xs);
        margin-bottom: var(--spacing-sm);
    }
    
    /* Modo toggle más compacto */
    .piano-mode-toggle {
        gap: var(--spacing-xs);
        margin-bottom: var(--spacing-sm);
    }
    
    .mode-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
        flex: 1;
    }
    
    .mode-description {
        font-size: var(--font-size-xs);
        margin-bottom: var(--spacing-sm);
    }
}

/* DISPOSITIVOS MUY PEQUEÑOS */
@media (max-width: 480px) {
    .header-content {
        padding: 0 var(--spacing-sm);
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .logo {
        font-size: var(--font-size-md);
    }
    
    .header-controls {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .header-controls button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
    
    .chord-palette,
    .progression-builder,
    .preset-progressions,
    .live-preview {
        padding: var(--spacing-md);
    }
    
    .progression-slots {
        grid-template-columns: 1fr;
    }
    
    .progression-controls {
        grid-template-columns: 1fr;
    }
    
    .preset-actions {
        flex-direction: column;
    }
}

/* OPTIMIZACIÓN ULTRA-COMPACTA PARA PANTALLAS MUY PEQUEÑAS */
@media screen and (max-width: 430px) and (orientation: portrait) {
    .piano-keyboard {
        height: 110px; /* Altura aún más compacta */
        margin: var(--spacing-xs) 0;
        padding: 6px; /* Padding reducido */
        border-width: 2px; /* Borde más fino */
    }
    
    .white-keys-container {
        min-width: 300px; /* Ancho mínimo absoluto para pantallas pequeñas */
        gap: 1px; /* Menos espacio entre teclas */
        padding-right: 15px;
    }
    
    .white-key {
        min-width: 24px; /* Teclas más pequeñas pero aún usables */
        flex: 0 0 24px;
        font-size: 10px;
    }
    
    .black-key {
        min-width: 14px;
        width: 14px;
    }
    
    /* Scrollbar más discreto para pantallas pequeñas */
    .piano-keyboard::-webkit-scrollbar {
        height: 6px;
    }
}