/* === TopMusicWorld — Design System from dising/ === */
/* Starlit violet cosmos — dark observatory theme */

/* ── Design Tokens (from dising/variables.css) ── */
:root {
    /* Colors */
    --color-void-canvas: #030014;
    --color-midnight-surface: #060317;
    --color-deep-indigo: #10093a;
    --color-lilac-white: #f4f0ff;
    --color-pearl: #ffffff;
    --color-ash: #a8a6b7;
    --color-fog: #918ea0;
    --color-steel: #54525f;
    --color-mercury: #cdccd0;
    --color-dusk: #72707b;
    --color-lavender-accent: #9382ff;
    --color-iris: #5046e4;
    --gradient-cosmic: linear-gradient(90.01deg, #e59cff 0.01%, #ba9cff 50.01%, #9cb2ff 100%);
    --gradient-aurora: linear-gradient(180deg, rgba(183,164,251,0) 0%, #b7a4fb 50%, #8562ff 100%, rgba(133,98,255,0) 100%);

    /* Typography */
    --font-heading: 'AeonikPro', 'Inter', 'DM Sans', ui-sans-serif, system-ui, -apple-system, sans-serif;
    --font-body: 'Inter V', 'Inter', 'Geist', ui-sans-serif, system-ui, -apple-system, sans-serif;

    /* Type Scale */
    --text-caption: 12px;
    --text-body-sm: 14px;
    --text-body: 16px;
    --text-body-lg: 18px;
    --text-subheading: 24px;
    --text-heading-sm: 32px;
    --text-heading: 48px;
    --text-heading-lg: 56px;
    --text-display: 72px;

    /* Spacing (base: 4px) */
    --spacing-4: 4px;
    --spacing-8: 8px;
    --spacing-12: 12px;
    --spacing-16: 16px;
    --spacing-20: 20px;
    --spacing-24: 24px;
    --spacing-32: 32px;
    --spacing-48: 48px;
    --spacing-56: 56px;
    --spacing-64: 64px;
    --spacing-72: 72px;
    --spacing-96: 96px;
    --spacing-120: 120px;

    /* Layout */
    --page-max-width: 1200px;
    --section-gap: 96px;
    --card-padding: 24px;

    /* Border Radius */
    --radius-button: 5px;
    --radius-card: 16px;
    --radius-badge: 32px;
    --radius-nav: 999px;

    /* Shadows — inset glow, not drop shadow */
    --shadow-card: rgba(255, 255, 255, 0.04) 0px 0px 24px 0px inset;
    --shadow-card-hover: rgba(255, 255, 255, 0.06) 0px 0px 24px 0px inset;
    --shadow-glow: rgba(164, 143, 255, 0.12) 0px -7px 11px 0px inset;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: 400;
    line-height: 1.5;
    background: var(--color-void-canvas);
    color: var(--color-ash);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ── Star Field Constellation ────────────────── */
/* Tiny white dots scattered across void canvas at low opacity */
body::before {
    content: '';
    position: fixed; inset: 0; z-index: -1;
    pointer-events: none;
    /* Ambient violet glows */
    background:
        /* Constellation dots — tiny 1-2px stars */
        radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.45), transparent),
        radial-gradient(1px 1px at 25% 8%, rgba(255,255,255,0.35), transparent),
        radial-gradient(1.5px 1.5px at 42% 22%, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 58% 12%, rgba(255,255,255,0.3), transparent),
        radial-gradient(1.5px 1.5px at 73% 18%, rgba(255,255,255,0.4), transparent),
        radial-gradient(1px 1px at 88% 25%, rgba(255,255,255,0.35), transparent),
        radial-gradient(1px 1px at 15% 35%, rgba(255,255,255,0.3), transparent),
        radial-gradient(1.5px 1.5px at 35% 42%, rgba(255,255,255,0.45), transparent),
        radial-gradient(1px 1px at 65% 38%, rgba(255,255,255,0.25), transparent),
        radial-gradient(1px 1px at 80% 48%, rgba(255,255,255,0.35), transparent),
        radial-gradient(1.5px 1.5px at 52% 55%, rgba(255,255,255,0.4), transparent),
        radial-gradient(1px 1px at 8% 60%, rgba(255,255,255,0.3), transparent),
        radial-gradient(1px 1px at 92% 62%, rgba(255,255,255,0.35), transparent),
        radial-gradient(1px 1px at 28% 70%, rgba(255,255,255,0.25), transparent),
        radial-gradient(1.5px 1.5px at 68% 72%, rgba(255,255,255,0.4), transparent),
        radial-gradient(1px 1px at 44% 82%, rgba(255,255,255,0.3), transparent),
        radial-gradient(1px 1px at 78% 85%, rgba(255,255,255,0.35), transparent),
        radial-gradient(1.5px 1.5px at 18% 88%, rgba(255,255,255,0.45), transparent),
        radial-gradient(1px 1px at 55% 92%, rgba(255,255,255,0.3), transparent),
        radial-gradient(1px 1px at 85% 95%, rgba(255,255,255,0.25), transparent),
        /* Ambient violet nebulas */
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(147, 130, 255, 0.06), transparent),
        radial-gradient(ellipse 50% 40% at 80% 80%, rgba(80, 70, 228, 0.04), transparent),
        radial-gradient(ellipse 40% 30% at 20% 60%, rgba(186, 156, 255, 0.03), transparent);
}

/* Twinkling animation on select stars */
@keyframes twinkle {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
/* ── Radar Scanner Effect ─────────────────── */
/* Rotating scan beam over the chart — constellation observatory vibe */
.radar-scanner {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 340px; height: 340px;
    pointer-events: none;
    z-index: 0;
    opacity: 0.35;
}

/* Rotating sweep beam — conic gradient that spins */
.radar-sweep {
    position: absolute; inset: 0;
    border-radius: 50%;
    background: conic-gradient(
        from 0deg,
        transparent 0deg,
        transparent 340deg,
        rgba(147, 130, 255, 0.5) 350deg,
        rgba(147, 130, 255, 0.15) 355deg,
        transparent 360deg
    );
    animation: radarSpin 4s linear infinite;
}

/* Concentric pulsing rings */
.radar-ring {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid rgba(147, 130, 255, 0.2);
    animation: radarPulse 3s ease-out infinite;
}
.radar-ring-1 { width: 80px; height: 80px; animation-delay: 0s; }
.radar-ring-2 { width: 160px; height: 160px; animation-delay: 1s; }
.radar-ring-3 { width: 240px; height: 240px; animation-delay: 2s; }

/* Center blip */
.radar-center-dot {
    position: absolute; top: 50%; left: 50%;
    width: 6px; height: 6px;
    margin: -3px 0 0 -3px;
    border-radius: 50%;
    background: var(--color-lavender-accent);
    box-shadow: 0 0 12px rgba(147, 130, 255, 0.6), 0 0 4px rgba(147, 130, 255, 0.4);
    animation: radarBlip 2s ease-in-out infinite;
}

@keyframes radarSpin {
    to { transform: rotate(360deg); }
}
@keyframes radarPulse {
    0% { opacity: 0.7; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(1.6); }
}
@keyframes radarBlip {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.8); }
}

/* Ensure hero stays above radar */
.chart-hero > *:not(.radar-scanner) {
    position: relative; z-index: 1;
}

.container { max-width: var(--page-max-width); margin: 0 auto; padding: 0 var(--spacing-24); }

/* ── Links ───────────────────────────────────── */
a {
    color: var(--color-lavender-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover { color: var(--color-lilac-white); }

/* ── Navigation Pill ──────────────────────────── */
.site-header {
    position: sticky; top: var(--spacing-16); z-index: 100;
    display: flex; justify-content: center; padding: var(--spacing-8) 0;
}
.site-header .container {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--color-midnight-surface);
    border-radius: var(--radius-nav);
    padding: var(--spacing-8) var(--spacing-24);
    height: 48px;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255, 255, 255, 0.04);
}
.site-logo {
    font-family: var(--font-heading);
    font-size: 15px; font-weight: 500;
    color: var(--color-lilac-white);
    text-decoration: none; letter-spacing: -0.2px;
}
.site-nav { display: flex; gap: var(--spacing-20); align-items: center; }
.site-nav a {
    font-family: var(--font-body);
    font-size: 15px; font-weight: 400;
    color: var(--color-fog);
    text-decoration: none;
    transition: color 0.2s ease;
}
.site-nav a:hover { color: var(--color-lilac-white); }

/* ── Mobile nav ──────────────────────────────── */
.nav-burger {
    display: none; background: none; border: none; cursor: pointer;
    padding: 8px; flex-direction: column; gap: 5px; z-index: 101;
}
.nav-burger span {
    display: block; width: 20px; height: 1.5px;
    background: var(--color-lilac-white); border-radius: 1px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-burger.active span:nth-child(2) { opacity: 0; }
.nav-burger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Hero Section ─────────────────────────────── */
.chart-hero {
    text-align: center; padding: var(--spacing-120) 0 var(--spacing-64);
    position: relative;
}
.chart-hero::before {
    content: '';
    position: absolute; top: -30%; left: 50%; transform: translateX(-50%);
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(147, 130, 255, 0.08), transparent 70%);
    pointer-events: none;
}

/* AI Badge Pill — violet glow badge above hero */
.chart-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 16px;
    border-radius: var(--radius-badge);
    background: var(--color-midnight-surface);
    border: 1px solid #5046e4;
    font-family: var(--font-body);
    font-size: 13px; font-weight: 500;
    color: var(--color-lilac-white);
    box-shadow: rgba(164, 143, 255, 0.12) 0px -7px 11px 0px inset;
    margin-bottom: var(--spacing-20);
    animation: badgeGlow 3s ease-in-out infinite;
}
.chart-badge .badge-icon { font-size: 14px; }
@keyframes badgeGlow {
    0%, 100% { box-shadow: rgba(164, 143, 255, 0.12) 0px -7px 11px 0px inset; }
    50% { box-shadow: rgba(164, 143, 255, 0.22) 0px -7px 16px 0px inset; }
}

.chart-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(32px, 5vw, var(--text-heading));
    font-weight: 500;
    line-height: 1.17;
    letter-spacing: -0.3px;
    color: var(--color-lilac-white);
    margin-bottom: var(--spacing-16);
}
/* Cosmic gradient applied to heading accent text */
.chart-hero h1 .cosmic-accent {
    background: var(--gradient-cosmic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.chart-description {
    font-family: var(--font-body);
    font-size: var(--text-body-lg);
    font-weight: 400;
    line-height: 1.56;
    color: var(--color-fog);
    margin-bottom: var(--spacing-12);
    text-align: justify;
    hyphens: auto;
}
.chart-updated {
    font-family: var(--font-body);
    font-size: var(--text-caption);
    font-weight: 400;
    color: var(--color-steel);
    letter-spacing: 0.5px;
}

/* ── View Toggle Bar ─────────────────────────── */
.view-toggle-bar {
    display: flex; justify-content: center;
    margin-bottom: var(--spacing-24);
}
.view-toggle {
    display: inline-flex; gap: 2px;
    padding: 3px;
    border-radius: var(--radius-nav);
    background: var(--color-midnight-surface);
    border: 1px solid rgba(255,255,255,0.04);
    box-shadow: var(--shadow-card);
}
.view-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 18px;
    border-radius: var(--radius-nav);
    border: none; cursor: pointer;
    background: transparent;
    color: var(--color-fog);
    font-family: var(--font-body);
    font-size: 13px; font-weight: 500;
    transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}
.view-btn:hover { color: var(--color-lilac-white); }
.view-btn.active {
    background: var(--color-deep-indigo);
    color: var(--color-lilac-white);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}

/* ── Chart Entries ───────────────────────────── */
.chart-entries { margin: 0 auto var(--spacing-96); }
/* Default: only table visible — JS toggles grid on button click */
#chart-grid-view { display: none; }
.chart-list { list-style: none; }

.chart-entry {
    display: flex; align-items: center; gap: var(--spacing-12);
    padding: var(--spacing-12) var(--spacing-16);
    border-radius: var(--radius-card);
    background: var(--color-midnight-surface);
    box-shadow: var(--shadow-card);
    margin-bottom: var(--spacing-8);
    transition: box-shadow 0.25s ease, transform 0.2s ease;
    border: 1px solid rgba(255, 255, 255, 0.03);
    opacity: 0; transform: translateY(20px);
    min-height: 56px;
}
.chart-entry.animate-in {
    animation: slideUp 0.5s ease forwards;
    animation-delay: var(--entry-delay, 0ms);
}
.chart-entry:hover {
    box-shadow: var(--shadow-card-hover), var(--shadow-glow);
    transform: translateY(-1px);
}
.chart-entry.animate-in:hover { transform: translateY(-1px); }

@keyframes slideUp {
    to { opacity: 1; transform: translateY(0); }
}

/* ── Chart Artist Thumbnail ──────────────────── */
.chart-artist-pic {
    flex-shrink: 0;
    width: 40px; height: 40px;
}
.chart-artist-img {
    width: 40px; height: 40px; object-fit: cover;
    border-radius: var(--radius-button);
    border: 1px solid rgba(255,255,255,0.04);
    box-shadow: var(--shadow-card);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.chart-entry:hover .chart-artist-img {
    transform: scale(1.05);
    box-shadow: var(--shadow-card-hover);
}
/* Empty avatar — initial letter */
.chart-artist-pic-empty {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    background: var(--color-deep-indigo);
    border-radius: var(--radius-button);
    border: 1px solid rgba(255,255,255,0.04);
}
.chart-artist-initial {
    font-family: var(--font-heading);
    font-size: 16px; font-weight: 500;
    color: var(--color-lavender-accent);
    line-height: 1;
}

/* ── Chart Apple Music Link (table view) ─────── */
.chart-apple-link {
    flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    width: 28px; height: 28px;
    border-radius: var(--radius-button);
    color: var(--color-fog);
    transition: color 0.2s ease, background 0.2s ease;
}
.chart-apple-link:hover {
    color: #fc3c44;
    background: rgba(252,60,68,0.1);
}

.chart-position {
    font-family: var(--font-heading);
    font-weight: 500; font-size: 20px; min-width: 40px; text-align: center;
    color: var(--color-lavender-accent);
    flex-shrink: 0;
}
.chart-position.position-1 { color: #fbbf24; }
.chart-position.pulse-glow {
    animation: pulseGlow 2s ease-in-out infinite;
}
@keyframes pulseGlow {
    0%, 100% { filter: drop-shadow(0 0 4px rgba(251, 191, 36, 0.4)); }
    50% { filter: drop-shadow(0 0 12px rgba(251, 191, 36, 0.8)); }
}

.chart-track-info { flex: 1; min-width: 0; }
.chart-track-info strong { display: block; }
.chart-track-info a {
    font-family: var(--font-body); font-weight: 500;
    color: var(--color-lilac-white); text-decoration: none;
    font-size: var(--text-body); line-height: 1.5;
}
.chart-track-info a:hover { color: var(--color-lavender-accent); }
.chart-artist { font-size: var(--text-body-sm); }
.chart-artist a {
    color: var(--color-ash); text-decoration: none; font-weight: 400;
}
.chart-artist a:hover { color: var(--color-lilac-white); }

.chart-meta {
    display: flex; gap: var(--spacing-12); align-items: center; flex-wrap: wrap;
    font-size: var(--text-caption); color: var(--color-fog);
}
.chart-genre {
    display: inline-block;
    background: rgba(147, 130, 255, 0.1);
    color: var(--color-lavender-accent);
    padding: 3px 10px; border-radius: var(--radius-badge);
    font-family: var(--font-body); font-size: var(--text-caption);
    font-weight: 500; letter-spacing: 0.3px;
}
.chart-country {
    font-size: var(--text-caption); color: var(--color-steel);
}
.chart-duration { font-size: var(--text-caption); color: var(--color-fog); }
.chart-isrc { font-size: var(--text-caption); color: var(--color-lavender-accent); }

.chart-empty {
    text-align: center; padding: var(--spacing-48); color: var(--color-fog);
    font-size: var(--text-body); font-style: italic;
}

/* ═══════════════════════════════════════════════
   GRID / CARDS VIEW
   ═══════════════════════════════════════════════ */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-20);
}
@media (max-width: 900px) {
    .chart-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .chart-grid { grid-template-columns: 1fr; }
}

.chart-card {
    background: var(--color-midnight-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255,255,255,0.03);
    overflow: hidden;
    transition: box-shadow 0.25s ease, transform 0.2s ease;
    opacity: 0; transform: translateY(20px);
}
.chart-card.animate-in {
    animation: slideUp 0.5s ease forwards;
    animation-delay: var(--entry-delay, 0ms);
}
.chart-card:hover {
    box-shadow: var(--shadow-card-hover), var(--shadow-glow);
    transform: translateY(-2px);
}
.chart-card.animate-in:hover { transform: translateY(-2px); }

.chart-card-img-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: var(--color-deep-indigo);
}
.chart-card-img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}
.chart-card-img-empty {
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-heading);
    font-size: 48px; font-weight: 500;
    color: var(--color-lavender-accent);
    background: var(--color-deep-indigo);
}

.chart-card-pos {
    position: absolute; top: 10px; left: 10px;
    padding: 4px 12px;
    border-radius: var(--radius-badge);
    background: var(--color-midnight-surface);
    border: 1px solid rgba(255,255,255,0.08);
    font-family: var(--font-heading);
    font-size: 14px; font-weight: 500;
    color: var(--color-lavender-accent);
    backdrop-filter: blur(8px);
}
.chart-card-pos.pos-gold {
    color: #fbbf24;
    border-color: rgba(251, 191, 36, 0.25);
}

.chart-card-body {
    padding: var(--spacing-16) var(--spacing-16) var(--spacing-20);
}
.chart-card-name {
    font-family: var(--font-heading);
    font-size: var(--text-body-lg);
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: var(--spacing-4);
}
.chart-card-name a {
    color: var(--color-lilac-white);
    text-decoration: none;
}
.chart-card-name a:hover { color: var(--color-lavender-accent); }

.chart-card-genre {
    display: inline-block;
    background: rgba(147, 130, 255, 0.1);
    color: var(--color-lavender-accent);
    padding: 3px 10px; border-radius: var(--radius-badge);
    font-size: var(--text-caption); font-weight: 500;
    margin-bottom: var(--spacing-8);
}
.chart-card-country {
    display: inline-block; margin-left: 6px;
    font-size: var(--text-caption); color: var(--color-steel);
}

.chart-card-track {
    font-size: var(--text-body-sm);
    color: var(--color-ash);
    margin: var(--spacing-8) 0 var(--spacing-12);
    line-height: 1.4;
}
.chart-card-track a {
    color: var(--color-fog); text-decoration: none; font-weight: 500;
}
.chart-card-track a:hover { color: var(--color-lilac-white); }

.chart-card-links {
    display: flex; gap: var(--spacing-8); flex-wrap: wrap;
}
.chart-card-link-apple {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 5px 12px;
    border-radius: var(--radius-button);
    background: var(--color-deep-indigo);
    border: 1px solid rgba(255,255,255,0.06);
    color: var(--color-lilac-white);
    text-decoration: none; font-size: 12px; font-weight: 500;
    transition: background 0.2s ease, color 0.2s ease;
}
.chart-card-link-apple:hover {
    background: rgba(252, 60, 68, 0.15);
    color: #fc3c44;
}

.chart-empty-grid {
    grid-column: 1 / -1;
}

.chart-json-ld-info {
    text-align: center; padding: var(--spacing-24); margin-top: var(--spacing-24);
    background: var(--color-midnight-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
}
.chart-json-ld-info p {
    text-align: justify;
    hyphens: auto;
}
.chart-json-ld-info small {
    color: var(--color-fog); font-size: var(--text-body-sm); line-height: 1.6;
}
.chart-json-ld-info a { color: var(--color-lavender-accent); }
.chart-json-ld-info a:hover { color: var(--color-lilac-white); }

/* ── Chart Info Footer ────────────────────────── */
/* Description block placed below chart entries, before footer */
.chart-info-footer {
    text-align: center;
    padding: var(--spacing-32) var(--spacing-24);
    margin: var(--spacing-32) 0 var(--spacing-48);
    background: var(--color-midnight-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255,255,255,0.03);
}
.chart-info-footer h2 {
    font-family: var(--font-heading);
    font-size: var(--text-subheading);
    font-weight: 500;
    color: var(--color-lilac-white);
    margin-bottom: var(--spacing-12);
}
.chart-info-footer .chart-description {
    max-width: 720px;
    margin: 0 auto var(--spacing-12);
}
.chart-info-footer .chart-updated { color: var(--color-steel); }

/* ── Artist Detail ───────────────────────────── */
.artist-detail { margin: var(--spacing-48) 0; }
.artist-header { margin-bottom: var(--spacing-24); }
.artist-header h1 {
    font-family: var(--font-heading);
    font-size: clamp(28px, 4vw, var(--text-heading));
    font-weight: 500;
    line-height: 1.17;
    letter-spacing: -0.3px;
    color: var(--color-lilac-white);
    margin-bottom: var(--spacing-8);
    max-width: 720px;
}
.artist-hero-img {
    width: 200px; height: 200px; object-fit: cover;
    border-radius: var(--radius-card); margin-bottom: var(--spacing-16);
    border: 1px solid rgba(255,255,255,0.04);
    box-shadow: var(--shadow-card);
}
.artist-genre {
    display: inline-block;
    font-family: var(--font-body); font-size: var(--text-body-sm);
    font-weight: 500;
    color: var(--color-lavender-accent);
    padding: var(--spacing-4) var(--spacing-16);
    background: rgba(147, 130, 255, 0.1);
    border-radius: var(--radius-badge);
    margin-bottom: var(--spacing-16);
    letter-spacing: 0.3px;
}
.artist-country {
    color: var(--color-steel); font-size: var(--text-body-sm);
    margin-bottom: var(--spacing-16);
}
.artist-bio {
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: 400;
    line-height: 1.65;
    color: var(--color-ash);
    margin-bottom: var(--spacing-24);
    max-width: 720px;
    text-align: justify;
    hyphens: auto;
}
.artist-links {
    display: flex; gap: var(--spacing-8); flex-wrap: wrap;
    margin-bottom: var(--spacing-48);
}

/* ── Track Detail ────────────────────────────── */
.track-detail { margin: var(--spacing-48) 0; }
.track-header { margin-bottom: var(--spacing-20); }
.track-header h1 {
    font-family: var(--font-heading);
    font-size: clamp(28px, 3.5vw, var(--text-heading-sm));
    font-weight: 500;
    line-height: 1.25;
    color: var(--color-lilac-white);
    max-width: 720px;
}
.track-artist-name { margin-bottom: var(--spacing-4); font-size: var(--text-body); }
.track-artist-name a {
    color: var(--color-lavender-accent); text-decoration: none; font-weight: 500;
}
.track-artist-name a:hover { color: var(--color-lilac-white); }
.track-meta {
    display: flex; gap: var(--spacing-20); flex-wrap: wrap;
    color: var(--color-fog); font-size: var(--text-body-sm);
    margin-bottom: var(--spacing-24);
}
.track-links { display: flex; gap: var(--spacing-8); flex-wrap: wrap; margin-bottom: var(--spacing-48); }

/* ── Track List ──────────────────────────────── */
.track-list { margin: 0; }
.track-row {
    display: flex; align-items: center; gap: var(--spacing-12);
    padding: var(--spacing-16) var(--spacing-20);
    border-radius: var(--radius-card);
    background: var(--color-midnight-surface);
    box-shadow: var(--shadow-card);
    margin-bottom: var(--spacing-8);
    font-size: var(--text-body);
    transition: box-shadow 0.25s ease;
    border: 1px solid rgba(255,255,255,0.03);
}
.track-row:hover { box-shadow: var(--shadow-card-hover); }
.track-title { flex: 1; min-width: 0; }
.track-title a {
    font-weight: 500; color: var(--color-lilac-white);
    text-decoration: none;
}
.track-title a:hover { color: var(--color-lavender-accent); }
.track-duration {
    color: var(--color-fog); font-size: var(--text-body-sm);
    white-space: nowrap;
}
.track-link-apple {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-button);
    background: var(--color-deep-indigo);
    border: 1px solid rgba(255,255,255,0.06);
    color: var(--color-lilac-white);
    text-decoration: none; font-size: 12px; font-weight: 500;
    transition: background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
    box-shadow: var(--shadow-card);
    white-space: nowrap;
}
.track-link-apple:hover {
    background: rgba(252, 60, 68, 0.15);
    color: #fc3c44;
    box-shadow: var(--shadow-card-hover);
}

.btn-apple-music {
    background: var(--color-deep-indigo);
    color: var(--color-lilac-white);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: var(--shadow-card);
}
.btn-apple-music:hover {
    background: rgba(252, 60, 68, 0.15);
    border-color: rgba(252, 60, 68, 0.2);
    color: #fc3c44;
    box-shadow: var(--shadow-card-hover);
}

/* ── Buttons ─────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 16px;
    border-radius: var(--radius-button);
    text-decoration: none;
    font-family: var(--font-body);
    font-size: 15px; font-weight: 500;
    transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
    border: none; cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn-spotify { background: #1db954; color: #000; }
.btn-spotify:hover { background: #1ed760; }
.btn-web {
    background: var(--color-deep-indigo);
    color: var(--color-lilac-white);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: var(--shadow-card);
}
.btn-web:hover {
    background: var(--color-deep-indigo);
    color: var(--color-pearl);
    box-shadow: var(--shadow-card-hover);
}

/* ── Aurora Divider ──────────────────────────── */
/* Thin line with violet gradient — transparent at ends, violet in center */
.aurora-divider {
    width: 100%; height: 1px; border: none;
    background: var(--gradient-aurora);
    margin: var(--spacing-48) 0;
    opacity: 0.6;
    animation: auroraPulse 4s ease-in-out infinite;
}
@keyframes auroraPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.7; }
}

/* ── Section Headers ─────────────────────────── */
.section { margin: var(--section-gap) 0; }
.section h2 {
    font-family: var(--font-heading);
    font-size: var(--text-heading-sm);
    font-weight: 500;
    line-height: 1.25;
    letter-spacing: -0.2px;
    color: var(--color-lilac-white);
    margin-bottom: var(--spacing-24);
}

/* ── Footer ──────────────────────────────────── */
.site-footer {
    background: var(--color-midnight-surface);
    box-shadow: var(--shadow-card);
    padding: var(--spacing-32) 0;
    margin-top: var(--spacing-120);
    text-align: center;
    color: var(--color-fog);
    font-size: var(--text-body-sm);
    line-height: 1.8;
    border-top: 1px solid rgba(255,255,255,0.03);
}
.site-footer strong {
    font-weight: 500;
    color: var(--color-lilac-white);
}
.site-footer a { color: var(--color-fog); }
.site-footer a:hover { color: var(--color-lavender-accent); }

/* ── Back to Top ─────────────────────────────── */
.back-to-top {
    position: fixed; bottom: var(--spacing-24); right: var(--spacing-24); z-index: 50;
    width: 44px; height: 44px; border-radius: var(--radius-button);
    background: var(--color-deep-indigo); color: var(--color-lilac-white);
    border: 1px solid rgba(255,255,255,0.06);
    font-size: 1.2rem; font-weight: 500; cursor: pointer;
    opacity: 0; transform: translateY(20px);
    transition: all 0.25s ease;
    box-shadow: var(--shadow-card);
    pointer-events: none;
}
.back-to-top.visible {
    opacity: 1; transform: translateY(0); pointer-events: auto;
}
.back-to-top:hover {
    box-shadow: var(--shadow-card-hover), var(--shadow-glow);
}

/* ── Scroll Reveal ───────────────────────────── */
.reveal {
    opacity: 0; transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

/* ── Responsive ──────────────────────────────── */
/* ── Chart Info Page ─────────────────────────── */
.chart-info-page {
    max-width: 720px;
    margin: var(--spacing-48) auto var(--spacing-96);
}
.chart-info-header {
    margin-bottom: var(--spacing-32);
    text-align: center;
}
.chart-info-header h1 {
    font-family: var(--font-heading);
    font-size: clamp(28px, 4vw, var(--text-heading));
    font-weight: 500;
    line-height: 1.17;
    letter-spacing: -0.3px;
    color: var(--color-lilac-white);
    margin-bottom: var(--spacing-8);
}
.chart-info-subtitle {
    font-size: var(--text-body);
    color: var(--color-fog);
}
.chart-info-section {
    margin-bottom: var(--spacing-32);
    background: var(--color-midnight-surface);
    border-radius: var(--radius-card);
    padding: var(--spacing-24);
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255,255,255,0.03);
}
.chart-info-section h2 {
    font-family: var(--font-heading);
    font-size: var(--text-subheading);
    font-weight: 500;
    line-height: 1.3;
    color: var(--color-lilac-white);
    margin-bottom: var(--spacing-12);
}
.chart-info-section p {
    font-size: var(--text-body);
    line-height: 1.65;
    color: var(--color-ash);
    text-align: justify;
    hyphens: auto;
}
.chart-info-section p + p {
    margin-top: var(--spacing-12);
}
.chart-info-section a {
    color: var(--color-lavender-accent);
}
.chart-info-section a:hover {
    color: var(--color-lilac-white);
}

/* ── Responsive ──────────────────────────────── */
@media (max-width: 640px) {
    .nav-burger { display: flex; }
    .site-nav {
        position: fixed; top: 0; right: -100%; width: 70%; max-width: 280px; height: 100vh;
        background: var(--color-midnight-surface);
        flex-direction: column; padding: 80px 32px 32px; gap: var(--spacing-24);
        transition: right 0.25s ease; z-index: 100;
        border-left: 1px solid rgba(255,255,255,0.04);
        box-shadow: var(--shadow-card);
    }
    .site-nav.nav-open { right: 0; }
    body.nav-locked { overflow: hidden; }
    .container { padding: 0 var(--spacing-16); }
    .chart-hero { padding: var(--spacing-64) 0 var(--spacing-48); }
    .view-btn { padding: 6px 12px; font-size: 12px; gap: 4px; }
    .chart-entry {
        flex-wrap: wrap; gap: var(--spacing-8);
        padding: var(--spacing-12);
        min-height: auto;
    }
    .chart-artist-pic { width: 36px; height: 36px; }
    .chart-artist-img { width: 36px; height: 36px; }
    .chart-artist-pic-empty { width: 36px; height: 36px; }
    .chart-artist-initial { font-size: 14px; }
    .chart-meta { width: 100%; }
    .chart-position { font-size: 18px; min-width: 32px; }
    .chart-apple-link { width: 24px; height: 24px; }
    /* card img-wrap now uses aspect-ratio: 1/1 — always square */
    .chart-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: var(--spacing-12); }
    .chart-card-body { padding: var(--spacing-12); }
    .chart-card-pos { font-size: 12px; padding: 3px 10px; top: 8px; left: 8px; }
    .artist-hero-img { width: 140px; height: 140px; }
    .track-meta { gap: var(--spacing-12); }
    .back-to-top { bottom: 16px; right: 16px; width: 40px; height: 40px; }
}

/* ── Reduce motion ───────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}