/**
 * Orthiis Music AI - Estilos Principales
 * Diseño inspirado en Spotify con tema oscuro/claro
 */

/* ============================================
   VARIABLES CSS
   ============================================ */
:root {
    /* Colores Principales */
    --primary-color: #1DB954;
    --primary-hover: #1ed760;
    --primary-dark: #169c46;
    
    /* Colores de Fondo - Tema Oscuro */
    --bg-base: #121212;
    --bg-elevated: #181818;
    --bg-highlight: #282828;
    --bg-press: #3e3e3e;
    --bg-sidebar: #000000;
    
    /* Colores de Texto */
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-subdued: #6a6a6a;
    
    /* Colores de Borde */
    --border-color: #282828;
    --border-hover: #3e3e3e;
    
    /* Colores de Estado */
    --success: #1DB954;
    --error: #e22134;
    --warning: #ffa42b;
    --info: #1e90ff;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    
    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Espaciado */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Tamaños */
    --sidebar-width: 280px;
    --topnav-height: 64px;
    --player-height: 90px;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
}

/* Tema Claro */
[data-theme="light"] {
    --bg-base: #ffffff;
    --bg-elevated: #f6f6f6;
    --bg-highlight: #e5e5e5;
    --bg-press: #d4d4d4;
    --bg-sidebar: #f6f6f6;
    
    --text-primary: #000000;
    --text-secondary: #6a6a6a;
    --text-subdued: #9a9a9a;
    
    --border-color: #d4d4d4;
    --border-hover: #b3b3b3;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Circular', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scrollbar personalizado */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-highlight);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-press);
}

/* ============================================
   LAYOUT PRINCIPAL
   ============================================ */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin-left: var(--sidebar-width);
    margin-bottom: var(--player-height);
}

.page-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    background: linear-gradient(
        180deg,
        rgba(var(--primary-rgb, 29, 185, 84), 0.2) 0%,
        var(--bg-base) 300px
    );
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--player-height));
    background-color: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-base);
}

.sidebar-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-logo {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--text-primary);
}

.sidebar-logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Navegación Sidebar */
.sidebar-nav {
    padding: var(--spacing-md) 0;
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link.active {
    color: var(--text-primary);
    border-left-color: var(--primary-color);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-link i {
    width: 24px;
    text-align: center;
    font-size: 1.25rem;
}

/* Secciones del Sidebar */
.sidebar-section {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.section-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

/* Playlists del Usuario */
.playlists-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.playlist-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.playlist-item:hover {
    background-color: var(--bg-highlight);
    color: var(--text-primary);
}

.playlist-item img {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    object-fit: cover;
}

.no-playlists {
    color: var(--text-subdued);
    font-size: 0.875rem;
    text-align: center;
    padding: var(--spacing-lg) 0;
}

/* Prompt de Login */
.login-prompt {
    padding: var(--spacing-lg);
}

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

.prompt-card i {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.prompt-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.prompt-card p {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

/* Promoción Premium */
.premium-promo {
    padding: var(--spacing-lg);
}

.promo-card {
    background: linear-gradient(135deg, #ffa42b, #ff6b35);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    color: white;
}

.promo-card i {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.promo-card h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.promo-card p {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

/* Footer Sidebar */
.sidebar-footer {
    margin-top: auto;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--text-subdued);
    text-decoration: none;
    font-size: 0.75rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.copyright {
    color: var(--text-subdued);
    font-size: 0.75rem;
    text-align: center;
}

/* ============================================
   TOP NAVIGATION
   ============================================ */
.top-nav {
    position: sticky;
    top: 0;
    height: var(--topnav-height);
    background-color: var(--bg-elevated);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    gap: var(--spacing-lg);
    z-index: 50;
    border-bottom: 1px solid var(--border-color);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
}

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

/* Botones de Navegación */
.nav-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--bg-base);
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background-color: var(--bg-press);
    transform: scale(1.05);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Toggle de Menú Móvil */
.mobile-menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ============================================
   BUSCADOR CON IA
   ============================================ */
.ai-search-container {
    position: relative;
    flex: 1;
    max-width: 600px;
}

.search-trigger {
    width: 100%;
    height: 40px;
    background-color: var(--bg-base);
    border: none;
    border-radius: 20px;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-subdued);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-trigger:hover {
    background-color: var(--bg-highlight);
}

.search-trigger i {
    font-size: 1rem;
}

/* Panel de Búsqueda IA */
.ai-search-panel {
    position: absolute;
    top: 50px;
    left: 0;
    right: 0;
    background-color: var(--bg-elevated);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideDown var(--transition-base);
}








/* Estilos para resultados de búsqueda mejorados */
.search-message {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
}

.suggestions-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.suggestions-section h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.suggestions-section h3::before {
    content: '💡';
    font-size: 24px;
}

.artists-found {
    background: var(--card-bg);
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 14px;
    color: var(--text-secondary);
}

.related-artists-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.related-artists {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 15px;
}

.no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.no-results i {
    font-size: 64px;
    opacity: 0.3;
    margin-bottom: 20px;
}









@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.ai-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.ai-greeting {
    flex: 1;
    font-weight: 600;
}

.close-search {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.close-search:hover {
    background-color: var(--bg-highlight);
    color: var(--text-primary);
}

/* Input de Búsqueda */
.search-input-wrapper {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
}

.ai-search-input {
    flex: 1;
    height: 48px;
    background-color: var(--bg-base);
    border: 2px solid transparent;
    border-radius: 24px;
    padding: 0 var(--spacing-lg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.ai-search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--bg-highlight);
}

.search-submit {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.search-submit:hover {
    background-color: var(--primary-hover);
    transform: scale(1.05);
}

/* Resultados de Búsqueda */
.ai-search-results {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.search-section {
    margin-bottom: var(--spacing-lg);
}

.search-section-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.search-results-grid {
    display: grid;
    gap: var(--spacing-md);
}

/* Loading Spinner */
.search-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   USER MENU
   ============================================ */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-highlight);
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--bg-press);
    transform: scale(1.05);
}

.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--bg-highlight);
    border: none;
    border-radius: 20px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-menu-btn:hover {
    background-color: var(--bg-press);
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.premium-badge {
    color: var(--warning);
    font-size: 0.875rem;
}

/* Dropdown Menu */
.user-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    min-width: 220px;
    background-color: var(--bg-elevated);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm) 0;
    animation: fadeIn var(--transition-fast);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--bg-highlight);
}

.dropdown-item i {
    width: 20px;
    text-align: center;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-sm) 0;
}

.text-danger {
    color: var(--error) !important;
}

/* ============================================
   MINI PLAYER (FIXED BOTTOM)
   ============================================ */
.mini-player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--player-height);
    background-color: var(--bg-elevated);
    border-top: 1px solid var(--border-color);
    z-index: 200;
}

.player-content {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    align-items: center;
    height: 100%;
    padding: 0 var(--spacing-lg);
    gap: var(--spacing-lg);
}

/* Track Info */
.track-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 0;
}

.track-cover {
    width: 56px;
    height: 56px;
    border-radius: var(--border-radius-sm);
    object-fit: cover;
    box-shadow: var(--shadow-sm);
}

.track-details {
    flex: 1;
    min-width: 0;
}

.track-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-favorite {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.btn-favorite:hover,
.btn-favorite.active {
    color: var(--primary-color);
}

/* Player Controls */
.player-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.control-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.btn-control {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-control:hover {
    color: var(--text-primary);
    transform: scale(1.05);
}

.btn-control.active {
    color: var(--primary-color);
}

.btn-play-pause {
    width: 40px;
    height: 40px;
    background-color: white;
    border-radius: 50%;
    color: black;
}

.btn-play-pause:hover {
    transform: scale(1.1);
    background-color: var(--text-primary);
}

/* Progress Bar */
.progress-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.time-current,
.time-total {
    font-size: 0.75rem;
    color: var(--text-subdued);
    min-width: 40px;
}

.progress-bar {
    flex: 1;
    height: 4px;
    background-color: var(--bg-press);
    border-radius: 2px;
    position: relative;
    cursor: pointer;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: width 0.1s linear;
}

.progress-handle {
    position: absolute;
    top: 50%;
    left: 0;
    width: 12px;
    height: 12px;
    background-color: white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.progress-bar:hover .progress-handle {
    opacity: 1;
}

/* Player Options */
.player-options {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

.btn-icon {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    color: var(--text-primary);
}

/* Volume Control */
.volume-control {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.volume-slider {
    width: 0;
    overflow: hidden;
    transition: width var(--transition-base);
}

.volume-control:hover .volume-slider {
    width: 80px;
}

.volume-slider input[type="range"] {
    width: 100%;
    height: 4px;
    background: var(--bg-press);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
}

.volume-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
}

.volume-slider input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* ============================================
   BOTONES
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 700;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: scale(1.04);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--text-primary);
    transform: scale(1.04);
}

.btn-premium {
    background: linear-gradient(135deg, var(--warning), #ff6b35);
    color: white;
}

.btn-premium:hover {
    transform: scale(1.04);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
}

/* ============================================
   CARDS Y GRIDS
   ============================================ */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.card {
    background-color: var(--bg-elevated);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.card:hover {
    background-color: var(--bg-highlight);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card-cover {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--border-radius-sm);
    object-fit: cover;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ============================================
   MODALS
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-lg);
    animation: fadeIn var(--transition-base);
}

.modal-content {
    background-color: var(--bg-elevated);
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: scaleIn var(--transition-base);
}

@keyframes scaleIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.25rem;
}

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

.modal-lyrics {
    max-width: 800px;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--bg-base);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--bg-highlight);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background-color: var(--bg-elevated);
    color: var(--text-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideInRight var(--transition-base);
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast.info {
    border-left: 4px solid var(--info);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 0;
        --player-height: 70px;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-buttons {
        display: none;
    }
    
    .ai-search-container {
        max-width: none;
    }
    
    .user-name {
        display: none;
    }
    
    .player-content {
        grid-template-columns: 1fr auto 1fr;
        gap: var(--spacing-sm);
        padding: 0 var(--spacing-md);
    }
    
    .track-cover {
        width: 40px;
        height: 40px;
    }
    
    .control-buttons {
        gap: var(--spacing-sm);
    }
    
    .btn-control {
        width: 28px;
        height: 28px;
    }
    
    .btn-play-pause {
        width: 36px;
        height: 36px;
    }
    
    .progress-container {
        display: none;
    }
    
    .player-options .volume-control,
    .player-options #fullscreenBtn,
    .player-options #downloadBtn {
        display: none;
    }
    
    .content-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .page-content {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .content-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .track-title,
    .track-artist {
        max-width: 120px;
    }
}

/* ============================================
   UTILIDADES
   ============================================ */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }



/* ============================================
   LYRICS MODAL - SISTEMA KARAOKE MEJORADO
   ============================================ */

.modal-lyrics {
    max-width: 900px;
    width: 90%;
    max-height: 85vh;
    background: linear-gradient(135deg, rgba(20, 20, 30, 0.98) 0%, rgba(30, 30, 45, 0.98) 100%);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-lyrics .modal-body {
    padding: 0;
    height: 70vh;
    display: flex;
    flex-direction: column;
}

.lyrics-scroll-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 40px 20px;
    position: relative;
    scroll-behavior: smooth;
}

.lyrics-scroll-container::-webkit-scrollbar {
    width: 8px;
}

.lyrics-scroll-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.lyrics-scroll-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.lyrics-scroll-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

.lyrics-lines {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.lyric-spacer {
    height: 80px;
}

.lyric-line {
    font-size: 1.8rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.4);
    margin: 25px 0;
    padding: 15px 30px;
    line-height: 1.6;
    transition: all 0.3s ease;
    cursor: pointer;
    border-radius: 12px;
}

.lyric-line.active {
    color: #ffffff;
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    border: 2px solid rgba(102, 126, 234, 0.5);
    transform: scale(1.05);
    text-shadow: 0 0 20px rgba(102, 126, 234, 0.6), 0 0 40px rgba(102, 126, 234, 0.4);
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 20px rgba(102, 126, 234, 0.3); }
    50% { box-shadow: 0 0 40px rgba(102, 126, 234, 0.5); }
}

.lyric-line.next {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.9rem;
}

.lyric-line:hover {
    color: rgba(255, 255, 255, 0.8);
    background: rgba(255, 255, 255, 0.05);
}

.lyrics-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
}

.lyrics-loading i {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.lyrics-loading p {
    font-size: 1.1rem;
}

.no-lyrics {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
    padding: 40px;
}

.no-lyrics i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.no-lyrics p {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.no-lyrics small {
    font-size: 0.9rem;
    opacity: 0.7;
}

.lyrics-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-lyrics-control {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-lyrics-control:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-lyrics-control i {
    font-size: 0.85rem;
}

.lyrics-scroll-container::before {
    content: '';
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to bottom, rgba(20, 20, 30, 1) 0%, transparent 100%);
    z-index: 1;
    pointer-events: none;
}

.lyrics-scroll-container::after {
    content: '';
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to top, rgba(20, 20, 30, 1) 0%, transparent 100%);
    z-index: 1;
    pointer-events: none;
}

@media (max-width: 768px) {
    .modal-lyrics {
        width: 95%;
        max-height: 90vh;
    }
    
    .lyric-line {
        font-size: 1.4rem;
        padding: 12px 20px;
        margin: 20px 0;
    }
    
    .lyric-line.active {
        font-size: 1.7rem;
    }
    
    .lyric-line.next {
        font-size: 1.5rem;
    }
    
    .lyrics-controls {
        flex-wrap: wrap;
        padding: 15px;
    }
    
    .btn-lyrics-control {
        font-size: 0.8rem;
        padding: 8px 15px;
    }
}