/**
 * MusicParty - Main Styles
 * Premium Dark Theme for Music Streaming
 */

/* ============================================
   CSS Variables
   ============================================ */
:root {
    /* Colors - Dark Premium Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-card: #1e1e28;
    --bg-hover: #252530;
    
    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-yellow: #f59e0b;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --text-link: #6366f1;
    
    /* Border Colors */
    --border-color: #27272a;
    --border-light: #3f3f46;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-index */
    --z-sidebar: 100;
    --z-header: 200;
    --z-player: 300;
    --z-modal: 400;
    --z-notification: 500;
    
    /* Player Height */
    --player-height: 90px;
    --header-height: 70px;
    --sidebar-width: 260px;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
}

/* Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(236, 72, 153, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

a {
    color: inherit;
    text-decoration: none;
    touch-action: manipulation;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
    touch-action: manipulation;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

/* ============================================
   Layout
   ============================================ */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
}

.app-body {
    display: flex;
    flex: 1;
    padding-top: var(--header-height);
    min-width: 0;
}

.main-content {
    flex: 1;
    min-width: 0;
    padding: var(--spacing-xl);
    padding-bottom: calc(var(--player-height) + var(--spacing-xl));
    margin-left: var(--sidebar-width);
    min-height: calc(100vh - var(--header-height));
    min-height: calc(100dvh - var(--header-height));
    transition: margin-left var(--transition-normal);
}

/* ============================================
   Loading Screen
   ============================================ */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-logo-img {
    width: min(280px, 72vw);
    aspect-ratio: 1;
    object-fit: contain;
    margin-bottom: var(--spacing-xl);
}

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

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

/* ============================================
   Sidebar
   ============================================ */
#sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    height: calc(100dvh - var(--header-height));
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    z-index: var(--z-sidebar);
    transition: transform var(--transition-normal);
}

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

.sidebar-section:last-child {
    border-bottom: none;
}

.sidebar-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    font-size: 0.9375rem;
}

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

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-primary);
}

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

.nav-badge {
    margin-left: auto;
    background: var(--accent-primary);
    color: white;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    display: none;
}

.nav-badge.show {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
}

/* ============================================
   Header
   ============================================ */
#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    z-index: var(--z-header);
}

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

#sidebar-toggle {
    display: none;
    font-size: 1.5rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
}

#sidebar-toggle:hover {
    background: var(--bg-hover);
}

.header-logo {
    display: flex;
    align-items: center;
    width: 172px;
    height: 44px;
    flex: 0 0 auto;
    overflow: hidden;
    border-radius: var(--radius-sm);
}

.header-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.header-center {
    flex: 1;
    max-width: 500px;
    margin: 0 var(--spacing-xl);
}

.search-box {
    position: relative;
    width: 100%;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    padding-left: 44px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-box button {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.125rem;
}

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

/* ============================================
   Page Styles
   ============================================ */
.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.page-title i {
    color: var(--accent-primary);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

#create-playlist-name.form-control,
#new-playlist-name.form-control,
#playlist-songs-picker-search.form-control,
#app-popup-input.form-control {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-lg);
}

#create-playlist-name.form-control::placeholder,
#new-playlist-name.form-control::placeholder,
#playlist-songs-picker-search.form-control::placeholder,
#app-popup-input.form-control::placeholder {
    color: var(--text-muted);
}

#create-playlist-name.form-control:focus,
#new-playlist-name.form-control:focus,
#playlist-songs-picker-search.form-control:focus,
#app-popup-input.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.app-popup-rich-message {
    white-space: normal !important;
}

#app-popup-modal .modal-dialog {
    max-width: min(620px, calc(100vw - 24px));
}

#app-popup-modal .modal-body {
    max-height: min(68vh, 620px);
    overflow-y: auto;
}

.about-musicparty {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    color: var(--text-secondary);
}

.about-musicparty-logo {
    width: min(190px, 58vw);
    aspect-ratio: 1;
    object-fit: contain;
    align-self: center;
    margin-bottom: var(--spacing-sm);
}

.about-musicparty p {
    margin: 0;
    line-height: 1.55;
}

.about-musicparty-lead {
    color: var(--text-primary);
    font-size: 1rem;
}

.about-musicparty-highlight {
    position: relative;
    color: var(--text-primary);
    border: 1px solid rgba(6, 182, 212, 0.38);
    border-left: 4px solid var(--accent-cyan);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.14), rgba(236, 72, 153, 0.08));
    padding: var(--spacing-md);
    box-shadow: 0 0 24px rgba(6, 182, 212, 0.08);
}

.about-musicparty strong {
    color: var(--text-primary);
}

.about-musicparty-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-sm);
}

.about-musicparty-stats span,
.about-musicparty-contact {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-sm) var(--spacing-md);
}

.about-musicparty-stats strong {
    display: block;
    color: var(--accent-cyan);
    font-size: 1.25rem;
}

.about-musicparty-contact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.about-musicparty-contact span {
    color: var(--text-muted);
}

.about-musicparty-contact a {
    color: var(--accent-cyan);
    font-weight: 700;
}

@media (max-height: 640px), (max-width: 480px) {
    .about-musicparty-logo {
        width: min(150px, 48vw);
    }
}

.playlist-preview-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 38px;
    background: rgba(99, 102, 241, 0.14);
    color: var(--text-primary);
    border: 1px solid rgba(99, 102, 241, 0.38);
    transition: background var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
}

.playlist-preview-btn:hover,
.playlist-preview-btn.active {
    background: var(--accent-primary);
    color: #ffffff;
}

.playlist-preview-btn:active {
    transform: scale(0.96);
}

/* ============================================
   Welcome Section
   ============================================ */
.welcome-section {
    position: relative;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(236, 72, 153, 0.1));
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-bottom: var(--spacing-2xl);
}

.welcome-content {
    position: relative;
    z-index: 1;
}

.welcome-layout {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.welcome-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.welcome-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.welcome-stats {
    display: flex;
    gap: var(--spacing-2xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.donation-card {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 0 0 auto;
    max-width: 340px;
    padding: var(--spacing-md);
    background: rgba(18, 18, 26, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.donation-copy {
    min-width: 0;
}

.donation-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--text-primary);
}

.donation-title i {
    color: var(--accent-green);
    font-size: 1.125rem;
}

.donation-text {
    display: block;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.35;
}

.donation-qr {
    width: 118px;
    height: 118px;
    flex: 0 0 118px;
    object-fit: cover;
    border-radius: var(--radius-md);
    background: white;
    padding: 6px;
}

.welcome-visual {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 300px;
    height: 300px;
    overflow: hidden;
    pointer-events: none;
}

.visual-circle {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0.1;
    animation: pulse 3s ease-in-out infinite;
}

.visual-circle.delay-1 {
    animation-delay: 1s;
    transform: translate(30px, -30px);
}

.visual-circle.delay-2 {
    animation-delay: 2s;
    transform: translate(-30px, 30px);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.1; }
    50% { transform: scale(1.1); opacity: 0.15; }
}

/* ============================================
   Sections
   ============================================ */
.songs-section,
.genres-section {
    margin-bottom: var(--spacing-2xl);
}

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

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.btn-see-all {
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.btn-see-all:hover {
    opacity: 0.8;
}

/* ============================================
   Genre Cards
   ============================================ */
.genre-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.genre-card {
    position: relative;
    height: 180px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.genre-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.genre-card-bg {
    position: absolute;
    inset: 0;
    transition: transform var(--transition-normal);
}

.genre-card:hover .genre-card-bg {
    transform: scale(1.05);
}

.genre-card-content {
    position: relative;
    height: 100%;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    z-index: 1;
}

.genre-icon {
    font-size: 2.5rem;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.genre-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.5);
    margin-bottom: var(--spacing-sm);
}

.genre-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-xs);
}

.genre-description {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xs);
}

.genre-song-count {
    font-size: 0.8125rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.92);
    margin-bottom: var(--spacing-xs);
}

.genre-access-count {
    font-size: 0.75rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: var(--spacing-md);
}

.btn-play-genre {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: white;
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-normal);
}

.genre-card:hover .btn-play-genre {
    opacity: 1;
    transform: translateY(0);
}

.btn-play-genre:hover {
    transform: scale(1.1) !important;
}

/* ============================================
   Song Grid
   ============================================ */
.song-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

/* ============================================
   Song Card
   ============================================ */
.song-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.song-card:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.song-cover {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.song-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.song-card:hover .song-cover img {
    transform: scale(1.05);
}

.song-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.song-card:hover .song-overlay {
    opacity: 1;
}

.btn-play-song {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transform: scale(0.8);
    transition: transform var(--transition-fast);
}

.btn-play-song:hover {
    transform: scale(1) !important;
}

.song-duration {
    position: absolute;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.75);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.song-info {
    margin-bottom: var(--spacing-sm);
}

.song-title {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-artist {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 1em;
}

.song-genre {
    font-size: 0.75rem;
    font-weight: 500;
}

.song-actions {
    display: flex;
    gap: var(--spacing-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.song-card:hover .song-actions {
    opacity: 1;
}

.btn-action {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

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

.btn-favorite.active {
    color: var(--accent-pink);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background: #5558e8;
    box-shadow: var(--shadow-glow);
}

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

.btn-outline:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.8125rem;
}

.songs-header {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   Song List
   ============================================ */
.song-list {
    display: flex;
    flex-direction: column;
}

.song-list-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
    cursor: pointer;
}

.song-list-item:hover {
    background: var(--bg-hover);
}

.song-list-item.current {
    background: rgba(99, 102, 241, 0.1);
}

.song-list-cover {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
}

.song-list-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.song-list-info {
    flex: 1;
    min-width: 0;
}

.song-list-title {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-list-artist {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.song-list-meta {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 2px;
    color: var(--accent-primary);
    font-size: 0.75rem;
    font-weight: 600;
}

.song-list-duration {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.song-list-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.song-list-actions .btn-icon {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.song-list-actions .btn-icon:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ============================================
   Playback Stats
   ============================================ */
.playback-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.playback-stat-card,
.dashboard-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.playback-stat-card {
    padding: var(--spacing-lg);
}

.playback-stat-card strong {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-primary);
    font-size: 1.75rem;
    line-height: 1;
}

.playback-stat-label {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 600;
}

.playback-dashboard {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.dashboard-panel {
    min-width: 0;
    padding: var(--spacing-lg);
}

.dashboard-panel-header {
    margin-bottom: var(--spacing-md);
}

.dashboard-panel-header h2 {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
}

.playback-chart {
    min-height: 220px;
}

.ranking-section {
    margin-bottom: var(--spacing-xl);
}

.ranking-song-list,
.artist-ranking-list {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.artist-ranking-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

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

.artist-ranking-item img {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    object-fit: cover;
}

.artist-ranking-item strong,
.artist-ranking-item span {
    display: block;
}

.artist-ranking-item span:not(.ranking-position) {
    color: var(--text-secondary);
    font-size: 0.8125rem;
}

.ranking-position {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.16);
    color: var(--accent-primary);
    font-size: 0.8125rem;
    font-weight: 700;
    flex-shrink: 0;
}

.ranking-empty {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

/* ============================================
   Institutional Pages
   ============================================ */
.institutional-page {
    width: min(100%, 1120px);
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.institutional-hero {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.institutional-logo {
    width: min(260px, 68vw);
    height: auto;
    object-fit: contain;
}

.institutional-hero span,
.institutional-contact span {
    color: var(--accent-cyan);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.institutional-hero h1 {
    max-width: 780px;
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.08;
}

.institutional-hero p {
    max-width: 820px;
    color: var(--text-secondary);
    font-size: 1.0625rem;
}

.institutional-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-lg);
}

.institutional-card,
.institutional-contact {
    background: rgba(30, 30, 40, 0.78);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
}

.institutional-card h2 {
    margin-bottom: var(--spacing-md);
    font-size: 1.15rem;
}

.institutional-card ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: 0;
    padding-left: 1.2rem;
    color: var(--text-secondary);
}

.institutional-card li::marker {
    color: var(--accent-primary);
}

.institutional-contact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.institutional-contact strong,
.institutional-contact p {
    display: block;
}

.institutional-contact strong {
    margin-top: var(--spacing-xs);
    font-size: 1.2rem;
}

.institutional-contact p {
    max-width: 620px;
    color: var(--text-secondary);
}

.chart-fallback-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.chart-fallback-row strong {
    color: var(--text-primary);
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--text-secondary);
}

/* ============================================
   Notifications
   ============================================ */
.notification-container {
    position: fixed;
    bottom: calc(var(--player-height) + var(--spacing-xl));
    right: var(--spacing-xl);
    z-index: var(--z-notification);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.notification {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transform: translateX(120%);
    transition: transform var(--transition-normal);
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    border-left: 3px solid var(--accent-green);
}

.notification-error {
    border-left: 3px solid #ef4444;
}

.notification-info {
    border-left: 3px solid var(--accent-primary);
}

.notification i {
    font-size: 1.25rem;
}

.notification-success i { color: var(--accent-green); }
.notification-error i { color: #ef4444; }
.notification-info i { color: var(--accent-primary); }

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ============================================
   Text Utilities
   ============================================ */
.text-danger { color: var(--accent-pink); }
.text-success { color: var(--accent-green); }
.text-muted { color: var(--text-muted); }

/* ============================================
   Form Elements
   ============================================ */
.form-select {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9375rem;
    cursor: pointer;
}

.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.search-filters {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.filter-group label {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.filter-group .form-select {
    min-width: 150px;
}