/* ============================================
   SUSPENDED - Premium Music Player
   Complete Redesign 2026 - Immersive Dark UI
   ============================================ */

/* === Design Tokens === */
:root {
    /* New Palette: Deep space dark with cyan-to-rose gradient accents */
    --bg-deep: #06060b;
    --bg-primary: #0a0b14;
    --bg-secondary: #101220;
    --bg-elevated: #171a2c;
    --bg-surface: #1e2138;

    /* Multi-hue accent system */
    --accent-cyan: #22d3ee;
    --accent-blue: #6366f1;
    --accent-violet: #a78bfa;
    --accent-rose: #fb7185;
    --accent-gradient: linear-gradient(135deg, #22d3ee, #6366f1, #a78bfa);
    --accent-gradient-h: linear-gradient(90deg, #22d3ee, #6366f1, #a78bfa, #fb7185);
    --accent-glow: rgba(99, 102, 241, 0.35);

    /* Text */
    --text-primary: #f0f0f5;
    --text-secondary: #8b8fa3;
    --text-muted: #555770;

    /* Glass */
    --glass-bg: rgba(10, 11, 20, 0.85);
    --glass-bg-heavy: rgba(10, 11, 20, 0.95);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-border-hover: rgba(255, 255, 255, 0.12);
    --glass-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Radius */
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;

    --text-xs: 0.75rem;
    --text-sm: 0.8125rem;
    --text-base: 0.9375rem;
    --text-lg: 1.0625rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.75rem;
    --text-5xl: 3.5rem;

    /* Motion */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-fast: 150ms var(--ease-out-expo);
    --transition-base: 300ms var(--ease-out-expo);
    --transition-slow: 500ms var(--ease-out-expo);

    /* Z-index */
    --z-base: 1;
    --z-sticky: 200;
    --z-modal: 300;
    --z-toast: 400;

    /* Safe areas */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --mini-player-h: 76px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Scrollbar */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-surface); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

:focus-visible { outline: 2px solid var(--accent-cyan); outline-offset: 2px; }

button { font-family: inherit; border: none; background: none; cursor: pointer; color: inherit; }
input { font-family: inherit; border: none; background: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* === App Container === */
.app-container {
    min-height: 100vh;
    min-height: 100dvh;
    position: relative;
}

/* === Grain Overlay - Cinematic texture === */
.grain-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    mix-blend-mode: overlay;
}

/* ============================================
   LOADING SCREEN - Cinematic
   ============================================ */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-deep);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    z-index: var(--z-modal);
}

.loader {
    display: flex;
    gap: 6px;
}

.loader-circle {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: loaderPulse 1.2s ease-in-out infinite;
}

.loader-circle:nth-child(1) {
    background: var(--accent-cyan);
    animation-delay: 0s;
}
.loader-circle:nth-child(2) {
    background: var(--accent-blue);
    animation-delay: 0.15s;
}
.loader-circle:nth-child(3) {
    background: var(--accent-violet);
    animation-delay: 0.3s;
}

@keyframes loaderPulse {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40% { transform: scale(1.2); opacity: 1; }
}

.loader-text {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: 0.3em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loader-line {
    width: 120px;
    height: 2px;
    background: var(--bg-surface);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.loader-line-fill {
    width: 40%;
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    animation: loaderSlide 1.2s ease-in-out infinite;
}

@keyframes loaderSlide {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}

/* ============================================
   HOME SCREEN - Immersive Landing
   ============================================ */
.home-screen {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--space-xl);
    overflow: hidden;
}

.home-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 520px;
    width: 100%;
}

/* Staggered entrance */
.home-content .logo-container { animation: revealUp 1s var(--ease-out-expo) 0.2s both; }
.home-content .home-features { animation: revealUp 1s var(--ease-out-expo) 0.4s both; }
.home-content .primary-button { animation: revealUp 1s var(--ease-out-expo) 0.6s both; }
.home-content .home-lang { animation: revealUp 1s var(--ease-out-expo) 0.8s both; }

@keyframes revealUp {
    from { opacity: 0; transform: translateY(40px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.logo-container { margin-bottom: var(--space-3xl); }

.logo-icon {
    width: 88px;
    height: 88px;
    margin: 0 auto var(--space-lg);
    background: var(--accent-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-3xl);
    color: white;
    box-shadow:
        0 0 50px rgba(34, 211, 238, 0.3),
        0 0 100px rgba(99, 102, 241, 0.15);
    animation: iconFloat 5s ease-in-out infinite;
    position: relative;
}

/* Animated ring around logo */
.logo-icon::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: inherit;
    padding: 2px;
    background: var(--accent-gradient-h);
    background-size: 300% 100%;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: borderSpin 4s linear infinite;
}

@keyframes borderSpin {
    0% { background-position: 0% center; }
    100% { background-position: 300% center; }
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-8px) rotate(1deg); }
    75% { transform: translateY(4px) rotate(-1deg); }
}

.logo-text {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-sm);
    background: var(--accent-gradient-h);
    background-size: 300% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textShift 6s ease-in-out infinite;
}

@keyframes textShift {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 100% center; }
}

.tagline {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 0.02em;
}

.home-features {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    transition: all var(--transition-base);
}

.feature-item:hover { color: var(--text-primary); transform: translateY(-2px); }

.feature-item i {
    font-size: var(--text-2xl);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* CTA Button */
.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-2xl);
    background: var(--accent-gradient);
    color: white;
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    box-shadow: 0 4px 24px var(--accent-glow);
    position: relative;
    overflow: hidden;
}

.primary-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
    transform: translateX(-100%);
    animation: btnShimmer 3s ease-in-out infinite;
}

@keyframes btnShimmer {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.primary-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 40px var(--accent-glow), 0 0 80px rgba(34, 211, 238, 0.15);
}

.primary-button:active { transform: translateY(0) scale(0.98); }

.primary-button i { transition: transform var(--transition-base); }
.primary-button:hover i { transform: translateX(4px); }

/* Language Toggle */
.language-toggle {
    display: inline-flex;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    padding: 3px;
}

.language-toggle button {
    padding: 6px 16px;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-muted);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.language-toggle button.active {
    background: var(--accent-gradient);
    color: white;
}

.language-toggle button:hover:not(.active) { color: var(--text-primary); }
.home-lang { margin-top: var(--space-2xl); }

/* Background - Animated Mesh Gradient */
.home-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    will-change: transform;
    animation: meshFloat 25s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-cyan);
    top: -15%;
    right: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-violet);
    bottom: -10%;
    left: -10%;
    animation-delay: -8s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-rose);
    top: 40%;
    left: 35%;
    animation-delay: -16s;
}

@keyframes meshFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(40px, -40px) scale(1.15); }
    50% { transform: translate(-30px, 30px) scale(0.85); }
    75% { transform: translate(25px, 40px) scale(1.1); }
}

/* Subtle grid lines for depth */
.grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.4) 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.4) 0%, transparent 70%);
}

/* ============================================
   PLAYER SCREEN
   ============================================ */
.player-screen {
    min-height: 100vh;
    min-height: 100dvh;
    background: var(--bg-primary);
    padding-top: var(--safe-top);
    position: relative;
}

/* Subtle ambient background for player */
.player-screen::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 40vh;
    background: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* === Header === */
.player-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: rgba(10, 11, 20, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Icon Button */
.icon-button {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.icon-button:hover { background: var(--bg-elevated); color: var(--text-primary); }
.icon-button.active { color: var(--accent-cyan); }
.icon-button:active { transform: scale(0.9); }

/* === Search === */
.search-container {
    position: relative;
    padding: var(--space-md) var(--space-lg);
}

.search-icon {
    position: absolute;
    left: calc(var(--space-lg) + 16px);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: var(--text-sm);
    pointer-events: none;
}

.search-bar {
    width: 100%;
    padding: 14px 18px 14px 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

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

.search-bar:focus {
    background: var(--bg-elevated);
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    outline: none;
}

.search-clear {
    position: absolute;
    right: calc(var(--space-lg) + 12px);
    top: 50%;
    transform: translateY(-50%);
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

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

.search-spinner {
    position: absolute;
    right: calc(var(--space-lg) + 12px);
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-cyan);
    font-size: var(--text-sm);
}

.search-clear + .search-spinner,
.search-spinner ~ .search-clear { display: none; }

/* === Filter Tags === */
.filter-section {
    display: flex;
    gap: var(--space-sm);
    padding: 0 var(--space-lg) var(--space-md);
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    flex-wrap: nowrap;
}

.filter-section::-webkit-scrollbar { display: none; }

.filter-tag {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 18px;
    height: 38px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.filter-tag:hover {
    background: var(--bg-elevated);
    border-color: var(--glass-border-hover);
    color: var(--text-primary);
}

.filter-tag.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
    box-shadow: 0 2px 12px var(--accent-glow);
}

.filter-tag:active { transform: scale(0.95); }

.filter-tag-favorites { gap: 6px; }
.filter-tag-favorites i { font-size: 11px; }
.filter-tag-favorites.active {
    background: linear-gradient(135deg, #fb7185, #e11d48);
}

/* ============================================
   SONG LIST
   ============================================ */
.song-list-container {
    overflow-y: auto;
    padding: 0 var(--space-lg);
    padding-bottom: calc(var(--mini-player-h) + var(--space-xl) + var(--safe-bottom));
    position: relative;
    z-index: 1;
}

.song-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Song Item - Card style */
.song-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.song-item::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    background: transparent;
    transition: all var(--transition-fast);
    pointer-events: none;
}

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

.song-item:hover::before {
    border-color: var(--glass-border-hover);
}

.song-item:active { transform: scale(0.99); }

.song-item.is-playing {
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.06), rgba(99, 102, 241, 0.08));
}

.song-item.is-playing::before {
    border-color: rgba(99, 102, 241, 0.2);
}

.song-item.is-playing .song-title {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Entrance animation */
.song-item-animate {
    animation: songReveal 0.5s var(--ease-out-expo) both;
}

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

.song-index {
    width: 26px;
    min-width: 26px;
    text-align: center;
    position: relative;
}

.index-number {
    font-size: var(--text-sm);
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.playing-icon {
    font-size: var(--text-sm);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Equalizer Bars - Now Playing indicator */
.equalizer-bars {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 2px;
    height: 16px;
}

.equalizer-bars span {
    display: block;
    width: 3px;
    border-radius: 2px;
    background: var(--accent-gradient);
    animation: eqBounce 0.8s ease-in-out infinite alternate;
}

.equalizer-bars span:nth-child(1) { height: 40%; animation-delay: 0s; }
.equalizer-bars span:nth-child(2) { height: 70%; animation-delay: 0.2s; }
.equalizer-bars span:nth-child(3) { height: 50%; animation-delay: 0.4s; }

@keyframes eqBounce {
    0% { height: 30%; }
    100% { height: 100%; }
}

.song-item:hover .index-number,
.song-item.is-playing .index-number {
    visibility: hidden;
    position: absolute;
}

.song-item.is-playing .playing-icon { display: block; }
.song-item:not(.is-playing) .playing-icon { display: none; }
.song-item.is-playing .equalizer-bars { display: flex; }
.song-item:not(.is-playing) .equalizer-bars { display: none; }

.song-image-container {
    position: relative;
    width: 52px;
    height: 52px;
    min-width: 52px;
    min-height: 52px;
}

.song-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-fast);
}

.song-item:hover .song-image { transform: scale(1.05); }

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

.song-image-overlay i { color: white; font-size: var(--text-base); }
.song-item:hover .song-image-overlay { opacity: 1; }

.song-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.song-title {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.song-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.like-button {
    width: 34px;
    height: 34px;
    min-width: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    border-radius: var(--radius-full);
    transition: all 0.3s var(--ease-spring);
}

.like-button:hover { color: var(--text-secondary); }
.like-button:active { transform: scale(1.3); }
.like-button.liked { color: var(--accent-rose); }
.like-button.liked { animation: heartBounce 0.4s var(--ease-spring); }

@keyframes heartBounce {
    0% { transform: scale(1); }
    30% { transform: scale(1.4); }
    60% { transform: scale(0.85); }
    100% { transform: scale(1); }
}

.song-duration {
    font-size: var(--text-sm);
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
    min-width: 38px;
    text-align: right;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl);
    color: var(--text-muted);
    text-align: center;
}

.empty-state i {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-md);
    opacity: 0.4;
}

/* ============================================
   SKELETON LOADING
   ============================================ */
.skeleton-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 0 var(--space-lg);
}

.skeleton-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    animation: skeletonIn 0.4s var(--ease-out-expo) both;
}

@keyframes skeletonIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.skeleton-index, .skeleton-image, .skeleton-title, .skeleton-artist, .skeleton-duration {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-elevated) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-index { width: 26px; height: 16px; min-width: 26px; border-radius: 4px; }
.skeleton-image { width: 52px; height: 52px; min-width: 52px; }
.skeleton-info { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.skeleton-title { height: 14px; width: 55%; }
.skeleton-artist { height: 12px; width: 35%; }
.skeleton-duration { width: 38px; height: 14px; min-width: 38px; }

/* ============================================
   MINI PLAYER - Glass Floating Bar
   ============================================ */
.mini-player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--mini-player-h);
    background: var(--glass-bg-heavy);
    backdrop-filter: blur(30px) saturate(1.2);
    -webkit-backdrop-filter: blur(30px) saturate(1.2);
    border-top: 1px solid var(--glass-border);
    padding: var(--space-sm) var(--space-lg);
    padding-bottom: calc(var(--space-sm) + var(--safe-bottom));
    display: flex;
    align-items: center;
    gap: var(--space-md);
    z-index: var(--z-sticky);
    cursor: pointer;
    animation: slideInUp 0.5s var(--ease-out-expo);
}

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

.mini-progress {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(255,255,255,0.05);
}

.mini-progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    transition: width 100ms linear;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 8px var(--accent-glow);
}

.mini-image {
    width: 52px;
    height: 52px;
    min-width: 52px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.mini-info { flex: 1; min-width: 0; overflow: hidden; }

.mini-title {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mini-artist {
    display: block;
    font-size: var(--text-xs);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mini-controls { display: flex; align-items: center; gap: 4px; }

.mini-like, .mini-play, .mini-next {
    width: 40px;
    height: 40px;
    min-width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.mini-like { color: var(--text-muted); }
.mini-like.liked { color: var(--accent-rose); }
.mini-like:active, .mini-next:active { transform: scale(0.85); }

.mini-play {
    background: var(--accent-gradient);
    box-shadow: 0 2px 12px var(--accent-glow);
}

.mini-play:hover { transform: scale(1.08); box-shadow: 0 4px 20px var(--accent-glow); }
.mini-play:active { transform: scale(0.95); }

.mini-next:hover { background: var(--bg-surface); }

.mini-close {
    width: 36px;
    height: 36px;
    min-width: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--text-muted);
    transition: all var(--transition-fast);
    margin-left: 2px;
}

.mini-close:hover { background: var(--bg-surface); color: var(--text-primary); }
.mini-close:active { transform: scale(0.85); }

/* ============================================
   FULL SCREEN PLAYER - Immersive Experience
   ============================================ */
.full-player {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    background: var(--bg-deep);
    overflow: hidden;
    animation: playerOpen 0.5s var(--ease-out-expo);
}

@keyframes playerOpen {
    from { opacity: 0; transform: translateY(60px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.full-player-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: blur(100px) saturate(1.8);
    transform: scale(1.4);
    opacity: 0.25;
    will-change: filter, transform;
    transition: background-image 0.5s ease;
}

.full-player-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(6, 6, 11, 0.7) 0%,
        rgba(6, 6, 11, 0.9) 50%,
        rgba(6, 6, 11, 0.98) 100%
    );
}

.full-player-content {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
    padding-top: calc(var(--space-lg) + var(--safe-top));
    padding-bottom: calc(var(--space-lg) + var(--safe-bottom));
    max-width: 480px;
    margin: 0 auto;
    width: 100%;
    overflow-y: auto;
}

.full-player-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    flex-shrink: 0;
}

.full-header-info { text-align: center; }

.playing-from {
    display: block;
    font-size: var(--text-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.playlist-name {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
}

/* Album Art Section */
.album-art-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md);
    flex-shrink: 0;
    position: relative;
}

.album-art-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.album-art {
    width: 280px;
    height: 280px;
    max-width: 72vw;
    max-height: 72vw;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(255,255,255,0.05);
    transition: all 0.6s var(--ease-out-expo);
}

.album-art.is-playing {
    animation: artBreathe 4s ease-in-out infinite;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.6),
        0 0 40px rgba(99, 102, 241, 0.15),
        0 0 0 1px rgba(255,255,255,0.05);
}

@keyframes artBreathe {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.025); }
}

/* Vinyl Ring */
.album-vinyl-ring {
    position: absolute;
    inset: -6px;
    border-radius: calc(var(--radius-lg) + 6px);
    padding: 2px;
    background: var(--accent-gradient-h);
    background-size: 400% 100%;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.album-vinyl-ring.is-playing {
    opacity: 0.8;
    animation: ringShift 3s linear infinite;
}

@keyframes ringShift {
    0% { background-position: 0% center; }
    100% { background-position: 400% center; }
}

/* Visualizer Canvas */
.visualizer-canvas {
    width: 100%;
    max-width: 320px;
    height: 80px;
    margin-top: var(--space-lg);
    opacity: 0;
    transition: opacity 0.5s ease;
    border-radius: var(--radius-sm);
}

.visualizer-canvas.active { opacity: 1; }

/* Floating Notes */
.floating-notes-container {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-note {
    position: absolute;
    bottom: 10%;
    font-size: 1.4rem;
    opacity: 0;
    animation: floatUp ease-out forwards;
}

@keyframes floatUp {
    0% { opacity: 0.7; transform: translateY(0) scale(1) rotate(0deg); }
    100% { opacity: 0; transform: translateY(-180px) scale(0.4) rotate(25deg); }
}

/* Song Info */
.full-song-info {
    padding: var(--space-md) 0;
    flex-shrink: 0;
    position: relative;
    z-index: 5;
}

.song-title-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-md);
}

.full-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: 4px;
    line-height: 1.2;
}

.full-artist {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.like-button-full {
    width: 46px;
    height: 46px;
    min-width: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    color: var(--text-secondary);
    transition: all 0.3s var(--ease-spring);
}

.like-button-full.liked { color: var(--accent-rose); }
.like-button-full:hover { transform: scale(1.15); }
.like-button-full:active { transform: scale(1.3); }

/* Tags */
.song-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: var(--space-sm); }

.tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Progress Bar */
.progress-container { padding: var(--space-lg) 0 var(--space-md); flex-shrink: 0; }

.progress-bar-wrapper {
    position: relative;
    cursor: pointer;
    padding: 10px 0;
    touch-action: none;
}

.progress-bar-bg {
    height: 4px;
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius-full);
    position: relative;
    transition: height 0.2s ease;
}

.progress-bar-wrapper:hover .progress-bar-bg { height: 6px; }

.progress-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width 100ms linear;
    box-shadow: 0 0 10px var(--accent-glow);
}

.progress-bar-handle {
    position: absolute;
    top: 50%;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    opacity: 0;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.progress-bar-wrapper:hover .progress-bar-handle { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.progress-bar-wrapper:active .progress-bar-handle { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }

.time-display {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-sm);
    font-size: var(--text-xs);
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

/* Main Controls */
.main-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    padding: var(--space-sm) 0;
    flex-shrink: 0;
}

.control-btn {
    width: 50px;
    height: 50px;
    min-width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-size: var(--text-xl);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    position: relative;
}

.control-btn:hover { transform: scale(1.12); }
.control-btn:active { transform: scale(0.92); }

.control-btn.secondary {
    width: 42px;
    height: 42px;
    min-width: 42px;
    font-size: var(--text-base);
    color: var(--text-secondary);
}

.control-btn.secondary.active { color: var(--accent-cyan); }

.control-btn.play-btn {
    width: 68px;
    height: 68px;
    min-width: 68px;
    background: var(--accent-gradient);
    font-size: var(--text-2xl);
    box-shadow: 0 4px 24px var(--accent-glow);
    position: relative;
    overflow: hidden;
}

.control-btn.play-btn:hover {
    box-shadow:
        0 6px 36px var(--accent-glow),
        0 0 80px rgba(34, 211, 238, 0.15);
}

/* Ripple */
.ripple-container { position: relative; overflow: hidden; }

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    transform: scale(0);
    animation: rippleExpand 0.6s ease-out;
    pointer-events: none;
}

@keyframes rippleExpand {
    to { transform: scale(4); opacity: 0; }
}

.repeat-one-badge {
    position: absolute;
    bottom: 5px;
    right: 5px;
    font-size: 9px;
    font-weight: 700;
    color: var(--accent-cyan);
}

/* Volume Controls */
.extra-controls {
    display: flex;
    justify-content: center;
    padding: var(--space-md) 0;
    flex-shrink: 0;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    max-width: 200px;
}

.volume-btn {
    width: 34px;
    height: 34px;
    min-width: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

.volume-slider-container {
    flex: 1;
    position: relative;
    height: 4px;
}

.volume-slider {
    width: 100%;
    height: 20px;
    margin: -8px 0;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    cursor: pointer;
    position: relative;
    z-index: 2;
}

.volume-slider::-webkit-slider-runnable-track {
    height: 4px;
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius-full);
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    margin-top: -5px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.volume-slider::-moz-range-track {
    height: 4px;
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius-full);
}

.volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    border: none;
}

.volume-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    pointer-events: none;
}

/* Queue Panel */
.queue-panel {
    position: absolute;
    inset: 70px var(--space-lg) 100px var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    z-index: 10;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.queue-panel h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-md);
    flex-shrink: 0;
}

.queue-list { flex: 1; overflow-y: auto; }

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

.queue-item:hover { background: var(--bg-elevated); }

.queue-item.current {
    background: rgba(34, 211, 238, 0.08);
    border: 1px solid rgba(34, 211, 238, 0.15);
}

.queue-item.current span:first-child { color: var(--accent-cyan); }

.queue-item img {
    width: 42px;
    height: 42px;
    min-width: 42px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.queue-item-info { flex: 1; min-width: 0; }

.queue-item-info span:first-child {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.queue-item-info span:last-child {
    display: block;
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

/* Toast */
.toast {
    position: fixed;
    bottom: calc(var(--mini-player-h) + 20px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-elevated);
    border: 1px solid var(--glass-border);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--text-primary);
    z-index: var(--z-toast);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    white-space: nowrap;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    animation: toastIn 0.3s var(--ease-out-expo);
}

@keyframes toastIn {
    from { opacity: 0; transform: translate(-50%, 12px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* ============================================
   TRANSITIONS
   ============================================ */
.fade-enter-active, .fade-leave-active { transition: opacity var(--transition-base); }
.fade-enter-from, .fade-leave-to { opacity: 0; }

.slide-up-enter-active, .slide-up-leave-active { transition: all var(--transition-slow); }
.slide-up-enter-from { opacity: 0; transform: translateY(100%); }
.slide-up-leave-to { opacity: 0; transform: translateY(100%); }

.slide-left-enter-active, .slide-left-leave-active { transition: all var(--transition-base); }
.slide-left-enter-from, .slide-left-leave-to { opacity: 0; transform: translateX(20px); }

/* ============================================
   RESPONSIVE - Mobile
   ============================================ */
@media (max-width: 480px) {
    :root { --space-lg: 16px; }

    .logo-text { font-size: var(--text-3xl); }
    .tagline { font-size: var(--text-base); }

    .song-image-container { width: 46px; height: 46px; min-width: 46px; min-height: 46px; }
    .song-title { font-size: var(--text-sm); }
    .song-artist { font-size: var(--text-xs); }
    .song-index { width: 22px; min-width: 22px; }

    .mini-image { width: 46px; height: 46px; min-width: 46px; }
    .mini-controls { gap: 2px; }
    .mini-like, .mini-next { width: 36px; height: 36px; min-width: 36px; }

    .album-art { width: 240px; height: 240px; }
    .full-title { font-size: var(--text-lg); }
    .main-controls { gap: var(--space-lg); }
    .control-btn { width: 44px; height: 44px; min-width: 44px; }
    .control-btn.play-btn { width: 60px; height: 60px; min-width: 60px; }
    .control-btn.secondary { width: 38px; height: 38px; min-width: 38px; }
    .tag { font-size: 10px; padding: 3px 8px; }

    .home-features { gap: var(--space-lg); }
}

/* === Tablet === */
@media (min-width: 768px) {
    .home-content { max-width: 600px; }
    .logo-icon { width: 100px; height: 100px; font-size: var(--text-4xl); }
    .logo-text { font-size: 3.5rem; }
    .player-screen { max-width: 800px; margin: 0 auto; }
    .song-item { padding: var(--space-md); }
    .song-image-container { width: 56px; height: 56px; min-width: 56px; min-height: 56px; }
    .full-player-content { max-width: 500px; }
    .album-art { width: 320px; height: 320px; max-width: 320px; max-height: 320px; }
    .full-title { font-size: var(--text-2xl); }
}

/* === Desktop === */
@media (min-width: 1024px) {
    .player-screen { max-width: 1000px; margin: 0 auto; }
    .mini-player {
        max-width: 1000px;
        left: 50%;
        transform: translateX(-50%);
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .full-player-content { padding: var(--space-xl); }
    .album-art { width: 340px; height: 340px; max-width: 340px; max-height: 340px; }
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   DEEZER ATTRIBUTION
   ============================================ */
.deezer-attribution {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg) 0;
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.deezer-logo {
    height: 14px;
    width: auto;
    color: var(--accent-cyan);
    opacity: 0.8;
}

.preview-badge {
    display: inline-block;
    padding: 2px 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 10px;
    color: var(--text-muted);
}

/* ============================================
   STATE MODIFIERS
   ============================================ */
/* Song item liked state - subtle rose tint */
.song-item.is-liked .like-button { color: var(--accent-rose); }

/* ============================================
   ADVANCED EFFECTS
   ============================================ */

/* Glow pulse behind play button in full player */
.control-btn.play-btn::after {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: inherit;
    background: var(--accent-gradient);
    opacity: 0;
    z-index: -1;
    filter: blur(20px);
    transition: opacity 0.3s ease;
}

.control-btn.play-btn:hover::after { opacity: 0.5; }

/* Subtle hover glow on song images */
.song-image-container::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-sm);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.song-item.is-playing .song-image-container::after { opacity: 1; }

/* Glow effect on mini-player when playing */
.mini-player::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(to top, rgba(99, 102, 241, 0.05), transparent);
    pointer-events: none;
    z-index: -1;
}

/* Active filter tag subtle glow */
.filter-tag.active { text-shadow: 0 0 12px rgba(255,255,255,0.3); }

/* Song item playing left accent line */
.song-item.is-playing::after {
    content: '';
    position: absolute;
    left: 0;
    top: 15%;
    bottom: 15%;
    width: 3px;
    border-radius: 2px;
    background: var(--accent-gradient);
    box-shadow: 0 0 8px var(--accent-glow);
}

/* Header title shimmer */
.header-title {
    background-size: 200% auto;
    animation: textShift 4s ease-in-out infinite;
}

/* Search focus glow animation */
.search-bar:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15), 0 0 20px rgba(99, 102, 241, 0.08);
}

/* === Print === */
@media print {
    .app-container { display: none; }
}