/* ═══════════════════════════════════════════════════════════════════════════
   GrooveBox — Design System
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Google Font import fallback (loaded via HTML) ─────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

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

/* ── Dark Theme (default) ───────────────────────────────────────────────────── */
:root,
[data-theme="dark"] {
  --bg:             #0b0b0f;
  --bg2:            #0f0f14;
  --surface:        #16161d;
  --surface2:       #1e1e28;
  --surface3:       #26263a;
  --surface4:       #32324a;
  --border:         rgba(255,255,255,0.07);
  --border-strong:  rgba(255,255,255,0.13);

  --accent:         #7c3aed;
  --accent2:        #a855f7;
  --accent-h:       #8b5cf6;
  --accent-dim:     rgba(124,58,237,0.18);
  --accent-glow:    rgba(124,58,237,0.4);
  --accent-text:    #c4b5fd;

  --pink:           #ec4899;
  --pink-dim:       rgba(236,72,153,0.15);
  --cyan:           #06b6d4;
  --green:          #10b981;

  --text:           #f1f0ff;
  --text-muted:     #9d9db8;
  --text-dim:       #4a4a6a;
  --danger:         #f43f5e;
  --danger-dim:     rgba(244,63,94,0.14);

  --bar-h:          90px;
  --sidebar-w:      248px;
  --radius:         12px;
  --radius-lg:      18px;
  --radius-xl:      24px;
  --transition:     0.2s ease;
  --shadow:         0 8px 40px rgba(0,0,0,0.6);
  --shadow-card:    0 4px 20px rgba(0,0,0,0.4);
  --shadow-glow:    0 0 40px rgba(124,58,237,0.25);

  --sidebar-bg:     #0b0b0f;
  --bar-bg:         rgba(16,16,22,0.95);
  --bar-blur:       blur(24px);
  --queue-bg:       #0f0f16;

  --gradient-hero:  linear-gradient(135deg, #1a0a2e 0%, #0b0b0f 60%);
  --gradient-card:  linear-gradient(145deg, #1e1e28, #16161d);
  --gradient-accent:linear-gradient(135deg, #7c3aed, #a855f7);
  --gradient-warm:  linear-gradient(135deg, #ec4899, #f97316);
  --gradient-cool:  linear-gradient(135deg, #06b6d4, #7c3aed);
}

/* ── Light Theme ────────────────────────────────────────────────────────────── */
[data-theme="light"] {
  --bg:             #f4f4f8;
  --bg2:            #eeeef4;
  --surface:        #ffffff;
  --surface2:       #f8f8fc;
  --surface3:       #ededf5;
  --surface4:       #e2e2ee;
  --border:         rgba(0,0,0,0.07);
  --border-strong:  rgba(0,0,0,0.13);

  --accent:         #7c3aed;
  --accent2:        #a855f7;
  --accent-h:       #6d28d9;
  --accent-dim:     rgba(124,58,237,0.1);
  --accent-glow:    rgba(124,58,237,0.2);
  --accent-text:    #7c3aed;

  --text:           #1a1a2e;
  --text-muted:     #5a5a7a;
  --text-dim:       #9898b8;
  --danger:         #f43f5e;
  --danger-dim:     rgba(244,63,94,0.1);

  --shadow:         0 8px 40px rgba(0,0,0,0.12);
  --shadow-card:    0 2px 12px rgba(0,0,0,0.08);
  --shadow-glow:    0 0 40px rgba(124,58,237,0.12);

  --sidebar-bg:     #ffffff;
  --bar-bg:         rgba(255,255,255,0.92);
  --bar-blur:       blur(24px);
  --queue-bg:       #f8f8fc;

  --gradient-hero:  linear-gradient(135deg, #ede9fe 0%, #f4f4f8 60%);
  --gradient-card:  linear-gradient(145deg, #f8f8fc, #ffffff);
}

/* ── Base ───────────────────────────────────────────────────────────────────── */
html, body { height: 100%; overflow: hidden; }
html { height: -webkit-fill-available; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  transition: background 0.35s ease, color 0.35s ease;
  /* Prevent iOS bounce/overscroll on body */
  overscroll-behavior: none;
  /* Prevent tap highlight flash on mobile */
  -webkit-tap-highlight-color: transparent;
}

/* ── Theme transition (smooth) ──────────────────────────────────────────────── */
*, *::before, *::after {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: 0.25s;
  transition-timing-function: ease;
}
/* Exclude animation-heavy elements from the blanket transition */
.eq-bar, .welcome-logo, #visualizer-canvas, .progress-fill,
.card-play-overlay, .song-card, .np-cover {
  transition: unset;
}

/* ── Scrollbar ──────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface4); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ── Visualizer Canvas ──────────────────────────────────────────────────────── */
#visualizer-canvas {
  position: fixed; bottom: var(--bar-h); left: 0; right: 0;
  width: 100%; height: 72px;
  pointer-events: none; z-index: 50;
  opacity: 0.5;
}

/* ── Layout ─────────────────────────────────────────────────────────────────── */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: 1fr var(--bar-h);
  height: 100vh;
  height: 100dvh; /* dynamic viewport height — accounts for mobile browser chrome */
  overflow: hidden;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SIDEBAR
   ═══════════════════════════════════════════════════════════════════════════ */
.sidebar {
  grid-row: 1 / 2;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  padding: 22px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  z-index: 300;
}

/* Logo */
.logo {
  display: flex; align-items: center; gap: 11px;
  padding: 0 6px;
}
.logo-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--gradient-accent);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1rem; flex-shrink: 0;
  box-shadow: 0 4px 16px var(--accent-glow);
  animation: logo-breathe 4s ease-in-out infinite;
}
@keyframes logo-breathe {
  0%,100% { box-shadow: 0 4px 16px var(--accent-glow); }
  50%      { box-shadow: 0 4px 28px var(--accent-glow), 0 0 0 4px var(--accent-dim); }
}
.logo span {
  font-size: 1.2rem; font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Nav */
nav { display: flex; flex-direction: column; gap: 2px; }

.nav-item {
  display: flex; align-items: center; gap: 13px;
  padding: 10px 12px; border-radius: 10px;
  color: var(--text-muted); text-decoration: none;
  font-weight: 600; font-size: 0.875rem;
  position: relative; overflow: hidden;
}
.nav-item::before {
  content: ''; position: absolute; inset: 0;
  background: var(--accent-dim); border-radius: 10px;
  opacity: 0; transition: opacity 0.2s;
}
.nav-item:hover::before { opacity: 1; }
.nav-item:hover { color: var(--text); }
.nav-item.active {
  color: var(--accent-text);
  background: var(--accent-dim);
}
.nav-item.active i { color: var(--accent); }
.nav-item i { width: 16px; text-align: center; font-size: 0.9rem; position: relative; z-index: 1; }
.nav-item span { position: relative; z-index: 1; }
.nav-item[data-view="liked"].active i { color: var(--pink); }
.nav-item[data-view="liked"].active { color: var(--pink); background: var(--pink-dim); }

/* Sidebar section */
.sidebar-section { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 10px; margin-bottom: 8px;
}
.section-title {
  font-size: 0.65rem; font-weight: 700;
  color: var(--text-dim); letter-spacing: 1.8px; text-transform: uppercase;
}

#playlist-sidebar {
  list-style: none;
  display: flex; flex-direction: column; gap: 1px;
  overflow-y: auto; flex: 1;
}
#playlist-sidebar li {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 12px; border-radius: 8px;
  color: var(--text-muted); font-size: 0.84rem;
  cursor: pointer;
}
#playlist-sidebar li:hover  { color: var(--text); background: var(--surface2); }
#playlist-sidebar li.active {
  color: var(--accent-text);
  background: var(--accent-dim);
}
#playlist-sidebar li .pl-icon { font-size: 0.85rem; width: 18px; text-align: center; flex-shrink: 0; color: var(--text-dim); }
#playlist-sidebar li .pl-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pl-empty-hint { color: var(--text-dim); font-size: 0.78rem; padding: 8px 12px; font-style: italic; }

/* Upload area */
.upload-area {
  margin-top: auto; padding-top: 14px;
  border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 10px;
}
.upload-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--surface2); color: var(--text-muted);
  padding: 10px 14px; border-radius: 10px; cursor: pointer;
  font-size: 0.82rem; font-weight: 600;
  border: 1px solid var(--border-strong);
  width: 100%;
}
.upload-btn:hover {
  color: var(--accent-text);
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* Theme toggle */
.theme-toggle {
  display: flex; align-items: center; gap: 10px;
  background: none; border: none; cursor: pointer;
  padding: 8px 10px; border-radius: 10px; width: 100%;
  color: var(--text-muted); font-size: 0.82rem; font-weight: 600;
}
.theme-toggle:hover { background: var(--surface2); color: var(--text); }
.theme-toggle-track {
  width: 36px; height: 20px; border-radius: 10px;
  background: var(--surface4); border: 1px solid var(--border-strong);
  position: relative; flex-shrink: 0;
  transition: background 0.3s ease;
}
[data-theme="light"] .theme-toggle-track { background: var(--accent); border-color: var(--accent); }
.theme-toggle-thumb {
  position: absolute; top: 2px; left: 2px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--text-muted);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), background 0.3s;
}
[data-theme="light"] .theme-toggle-thumb { transform: translateX(16px); background: #fff; }
.theme-toggle-label { display: flex; align-items: center; gap: 7px; }

/* Sidebar overlay (mobile) */
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 290;
}
.sidebar-overlay.open { display: block; }
.mobile-menu-btn { display: none; }

/* Sidebar buttons */
.icon-btn.small { width: 26px; height: 26px; font-size: 0.75rem; }
.pl-del-btn {
  background: none; border: none; color: var(--text-dim);
  cursor: pointer; font-size: 0.75rem; padding: 3px 5px;
  border-radius: 4px; opacity: 0;
  flex-shrink: 0;
}
#playlist-sidebar li:hover .pl-del-btn { opacity: 1; }
.pl-del-btn:hover { color: var(--danger); background: var(--danger-dim); }

/* ═══════════════════════════════════════════════════════════════════════════
   MAIN CONTENT
   ═══════════════════════════════════════════════════════════════════════════ */
.main {
  grid-column: 2; grid-row: 1;
  background: var(--gradient-hero);
  overflow-y: auto;
  padding: 30px 36px 28px;
  position: relative;
  transition: background 0.7s ease;
}

.main-header {
  display: flex; align-items: center;
  justify-content: space-between;
  margin-bottom: 32px; gap: 16px; flex-wrap: wrap;
}
.main-header-left { display: flex; align-items: center; gap: 12px; }
.main-header h2 {
  font-size: 1.8rem; font-weight: 800;
  letter-spacing: -0.6px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
[data-theme="light"] .main-header h2 { -webkit-text-fill-color: var(--text); }

.header-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

/* Search */
.search-box {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface); border-radius: 50px;
  padding: 9px 18px; width: 260px;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s, box-shadow 0.2s, width 0.2s ease;
}
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim), var(--shadow-card);
  width: 300px;
}
.search-box i { color: var(--text-dim); font-size: 0.82rem; flex-shrink: 0; }
.search-box input {
  background: none; border: none; outline: none;
  color: var(--text); font-size: 0.875rem; width: 100%;
  font-family: inherit;
}
.search-box input::placeholder { color: var(--text-dim); }
.search-clear {
  background: none; border: none; color: var(--text-dim);
  cursor: pointer; padding: 0; font-size: 0.8rem;
}
.search-clear:hover { color: var(--text); }

/* Drop zone */
.drop-zone {
  position: absolute; inset: 0; z-index: 400;
  background: rgba(11,11,15,0.88);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s;
  border: 2px dashed var(--accent);
  border-radius: var(--radius-xl);
  margin: 10px;
  backdrop-filter: blur(8px);
}
[data-theme="light"] .drop-zone { background: rgba(244,244,248,0.88); }
.drop-zone.active { opacity: 1; pointer-events: all; }
.drop-zone-inner {
  text-align: center; color: var(--accent);
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.drop-zone-inner i {
  font-size: 3.5rem;
  animation: bounce-up 1s ease-in-out infinite alternate;
}
@keyframes bounce-up {
  from { transform: translateY(0); }
  to   { transform: translateY(-10px); }
}
.drop-zone-inner p { font-size: 1.1rem; font-weight: 700; }

/* ── Song Grid ──────────────────────────────────────────────────────────────── */
.song-grid { display: flex; flex-direction: column; gap: 40px; }

.grid-section { width: 100%; }
.grid-section-title {
  font-size: 0.7rem; font-weight: 700;
  color: var(--text-dim); letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 18px;
  display: flex; align-items: center; gap: 12px;
}
.grid-section-title::after {
  content: ''; flex: 1; height: 1px;
  background: var(--border);
}

.song-grid-inner {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(162px, 1fr));
  gap: 16px;
}

/* ── Song Card ──────────────────────────────────────────────────────────────── */
.song-card {
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  padding: 14px;
  cursor: pointer;
  position: relative;
  border: 1px solid var(--border);
  user-select: none;
  transition: transform 0.22s cubic-bezier(0.34,1.56,0.64,1),
              box-shadow 0.22s ease,
              border-color 0.2s ease,
              background 0.2s ease;
}
.song-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px var(--border-strong);
  border-color: var(--border-strong);
}
[data-theme="light"] .song-card:hover {
  box-shadow: 0 12px 32px rgba(0,0,0,0.12), 0 0 0 1px var(--border-strong);
}
.song-card.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-glow);
}

/* Always show play overlay on touch devices */
@media (hover: none) {
  .card-play-overlay { opacity: 1; transform: translateY(0) scale(1); }
  .song-card.active .card-play-overlay { opacity: 1; }
  .song-card:hover { transform: none; }
  .pl-del-btn { opacity: 1; }
}

/* Card cover */
.card-cover {
  width: 100%; aspect-ratio: 1;
  border-radius: 10px; margin-bottom: 13px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.8rem; position: relative; overflow: hidden;
  box-shadow: 0 6px 20px rgba(0,0,0,0.35);
}
.card-cover::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.card-cover .cover-icon {
  pointer-events: none;
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3));
}
.song-card:hover .cover-icon { transform: scale(1.12) rotate(-3deg); }

/* Play overlay */
.card-play-overlay {
  position: absolute; bottom: 10px; right: 10px;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; opacity: 0;
  transition: opacity 0.2s ease, transform 0.25s cubic-bezier(0.34,1.56,0.64,1);
  transform: translateY(10px) scale(0.85);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.song-card:hover .card-play-overlay,
.song-card.active .card-play-overlay {
  opacity: 1; transform: translateY(0) scale(1);
}

/* Card text */
.card-title {
  font-size: 0.875rem; font-weight: 700;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--text);
}
.card-artist {
  font-size: 0.77rem; color: var(--text-muted);
  margin-top: 3px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.card-meta {
  font-size: 0.68rem; color: var(--text-dim);
  margin-top: 3px;
  display: inline-flex; align-items: center;
  background: var(--surface3); border-radius: 4px;
  padding: 1px 6px; margin-top: 5px;
}

/* Card actions */
.card-actions {
  display: flex; align-items: center; gap: 2px;
  margin-top: 10px;
}
.card-like-btn, .delete-btn, .card-add-pl-btn {
  background: none; border: none; cursor: pointer;
  font-size: 0.82rem; padding: 5px 7px; border-radius: 6px;
  color: var(--text-dim);
}
.card-like-btn:hover { color: var(--pink); background: var(--pink-dim); }
.card-like-btn.liked { color: var(--pink); }
.delete-btn:hover { color: var(--danger); background: var(--danger-dim); }
.card-add-pl-btn:hover { color: var(--accent-text); background: var(--accent-dim); }
.card-add-pl-btn.in-pl { color: var(--accent-text); }

/* Active card shimmer */
.song-card.active .card-cover::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 50%, rgba(124,58,237,0.2));
  border-radius: 10px; pointer-events: none;
  animation: shimmer-pulse 2s ease-in-out infinite;
}
@keyframes shimmer-pulse {
  0%,100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

/* Equalizer bars */
.eq-bars {
  display: flex; align-items: flex-end; gap: 2px;
  height: 14px; margin-left: auto;
}
.eq-bar {
  width: 3px; background: var(--accent); border-radius: 2px;
  animation: eq-bounce 0.55s ease-in-out infinite alternate;
}
.eq-bar:nth-child(1) { animation-delay: 0s;    height: 5px; }
.eq-bar:nth-child(2) { animation-delay: 0.18s; height: 10px; }
.eq-bar:nth-child(3) { animation-delay: 0.32s; height: 14px; }
.eq-bar:nth-child(4) { animation-delay: 0.08s; height: 8px; }
@keyframes eq-bounce {
  from { transform: scaleY(0.25); opacity: 0.6; }
  to   { transform: scaleY(1);    opacity: 1; }
}

/* Empty state */
.empty-state {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 16px; padding: 80px 20px;
  color: var(--text-dim); text-align: center;
}
.empty-state i { font-size: 3.5rem; opacity: 0.2; }
.empty-state p { font-size: 0.9rem; max-width: 260px; line-height: 1.7; }

/* ═══════════════════════════════════════════════════════════════════════════
   NOW PLAYING BAR
   ═══════════════════════════════════════════════════════════════════════════ */
.now-playing {
  grid-column: 1 / 3;
  background: var(--bar-bg);
  backdrop-filter: var(--bar-blur);
  -webkit-backdrop-filter: var(--bar-blur);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  z-index: 100;
  position: relative;
}
/* Subtle top accent line */
.now-playing::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: var(--gradient-accent);
  opacity: 0.5;
}

/* NP Info */
.np-info { display: flex; align-items: center; gap: 13px; min-width: 0; }

.np-cover {
  width: 56px; height: 56px; border-radius: 10px;
  background: var(--surface3);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: var(--text-muted);
  flex-shrink: 0; overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.35);
  position: relative;
}
.np-cover::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 60%);
  pointer-events: none; border-radius: 10px;
}
.np-cover.pulse { animation: cover-pulse 0.35s cubic-bezier(0.34,1.56,0.64,1); }
@keyframes cover-pulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.np-meta { min-width: 0; flex: 1; }
.np-title {
  display: block; font-size: 0.875rem; font-weight: 700;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 190px;
}
.np-artist {
  display: block; font-size: 0.73rem; color: var(--text-muted);
  margin-top: 2px;
}

.like-btn-np { color: var(--text-dim); flex-shrink: 0; }
.like-btn-np.liked { color: var(--pink); }
.like-btn-np:hover { color: var(--pink); }

/* Controls */
.np-controls { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.control-btns { display: flex; align-items: center; gap: 18px; }

.icon-btn {
  background: none; border: none;
  color: var(--text-muted); cursor: pointer;
  font-size: 1rem; padding: 6px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  transition: color 0.15s ease, transform 0.15s cubic-bezier(0.34,1.56,0.64,1);
}
.icon-btn:hover  { color: var(--text); transform: scale(1.18); }
.icon-btn.active { color: var(--accent); }
.icon-btn.active::after {
  content: ''; position: absolute; bottom: -1px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent);
}

.play-main {
  width: 42px; height: 42px;
  background: var(--gradient-accent);
  color: #fff; font-size: 0.95rem;
  box-shadow: 0 4px 20px var(--accent-glow);
  transition: transform 0.15s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.2s ease;
}
.play-main:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px var(--accent-glow);
  color: #fff;
}
.play-main::after { display: none; }

/* Progress */
.progress-area {
  display: flex; align-items: center; gap: 10px;
  width: 100%; font-size: 0.7rem; color: var(--text-dim);
  font-variant-numeric: tabular-nums; font-weight: 500;
}
.progress-bar {
  flex: 1; height: 4px; background: var(--surface3);
  border-radius: 10px; position: relative; cursor: pointer;
  transition: height 0.15s ease;
  /* Expand touch target without changing visual size */
  touch-action: none;
}
.progress-bar::after {
  content: ''; position: absolute;
  inset: -10px 0; /* 10px extra tap area top/bottom */
}
.progress-bar:hover { height: 6px; }
.progress-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 10px; pointer-events: none;
  transition: width 0.1s linear;
}
.progress-thumb {
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--text); position: absolute;
  top: 50%; transform: translate(-50%, -50%);
  opacity: 0; pointer-events: none;
  box-shadow: 0 0 0 3px var(--accent-dim);
  transition: opacity 0.15s;
}
.progress-bar:hover .progress-thumb { opacity: 1; }

/* Volume */
.np-extra { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }
.volume-bar {
  width: 88px; height: 4px; background: var(--surface3);
  border-radius: 10px; position: relative; cursor: pointer; flex-shrink: 0;
  transition: height 0.15s ease;
  touch-action: none;
}
.volume-bar::after {
  content: ''; position: absolute;
  inset: -10px 0;
}
.volume-bar:hover { height: 6px; }
.volume-fill {
  height: 100%; background: var(--gradient-accent);
  border-radius: 10px; pointer-events: none;
}
.volume-thumb {
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--text); position: absolute;
  top: 50%; transform: translate(-50%, -50%);
  opacity: 0; pointer-events: none;
  box-shadow: 0 0 0 3px var(--accent-dim);
  transition: opacity 0.15s;
}
.volume-bar:hover .volume-thumb { opacity: 1; }

/* Repeat indicator */
#repeat-btn[data-mode="one"]::before {
  content: '1';
  font-size: 0.48rem; font-weight: 900;
  position: absolute; top: 0; right: 0;
  color: var(--accent); line-height: 1;
}

/* ═══════════════════════════════════════════════════════════════════════════
   QUEUE PANEL
   ═══════════════════════════════════════════════════════════════════════════ */
.queue-panel {
  position: fixed; right: 0; top: 0;
  width: 320px; height: calc(100vh - var(--bar-h));
  background: var(--queue-bg);
  border-left: 1px solid var(--border);
  padding: 22px 16px; overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.32s cubic-bezier(0.4,0,0.2,1);
  z-index: 200;
}
.queue-panel.open { transform: translateX(0); }

.queue-header {
  display: flex; justify-content: space-between;
  align-items: center; margin-bottom: 18px;
}
.queue-header h3 { font-size: 0.95rem; font-weight: 700; }

#queue-list { list-style: none; display: flex; flex-direction: column; gap: 2px; }
#queue-list li {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: 8px; cursor: pointer;
}
#queue-list li:hover  { background: var(--surface2); }
#queue-list li.active { background: var(--accent-dim); }
#queue-list li.active .q-title { color: var(--accent-text); }

.q-num  { width: 22px; text-align: center; font-size: 0.73rem; color: var(--text-dim); flex-shrink: 0; }
.q-info { flex: 1; min-width: 0; }
.q-title  { font-size: 0.83rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.q-artist { font-size: 0.71rem; color: var(--text-muted); }
.q-emoji  { font-size: 1.1rem; flex-shrink: 0; }

/* ═══════════════════════════════════════════════════════════════════════════
   TOAST
   ═══════════════════════════════════════════════════════════════════════════ */
.toast {
  position: fixed; bottom: calc(var(--bar-h) + 20px); left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--surface3);
  color: var(--text);
  padding: 10px 22px; border-radius: 50px;
  font-size: 0.82rem; font-weight: 600;
  z-index: 9999; opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease, transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
  white-space: nowrap;
  box-shadow: 0 4px 28px rgba(0,0,0,0.5);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(12px);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ═══════════════════════════════════════════════════════════════════════════
   WELCOME OVERLAY
   ═══════════════════════════════════════════════════════════════════════════ */
#welcome-overlay {
  position: fixed; inset: 0; z-index: 10000;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.5s ease;
  overflow: hidden;
  background: var(--bg);
}
/* Animated gradient background */
#welcome-overlay::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 40%, rgba(124,58,237,0.35) 0%, transparent 55%),
              radial-gradient(ellipse at 75% 65%, rgba(236,72,153,0.25) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 20%, rgba(6,182,212,0.15) 0%, transparent 45%);
  pointer-events: none;
}
[data-theme="light"] #welcome-overlay::before {
  background: radial-gradient(ellipse at 30% 40%, rgba(124,58,237,0.18) 0%, transparent 55%),
              radial-gradient(ellipse at 75% 65%, rgba(236,72,153,0.12) 0%, transparent 50%);
}
/* Floating orbs */
#welcome-overlay::after {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(124,58,237,0.25) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(236,72,153,0.2) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(6,182,212,0.1) 0%, transparent 50%);
  animation: orb-drift 8s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes orb-drift {
  from { transform: scale(1) translate(0,0); }
  to   { transform: scale(1.1) translate(2%, 2%); }
}

#welcome-overlay.fade-out { opacity: 0; pointer-events: none; }

.welcome-card {
  position: relative; z-index: 1;
  text-align: center;
  display: flex; flex-direction: column;
  align-items: center; gap: 20px;
  animation: wIn 0.8s cubic-bezier(0.22,1,0.36,1) both;
  padding: 48px 40px;
  background: rgba(22,22,29,0.7);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(24px);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(124,58,237,0.2);
}
[data-theme="light"] .welcome-card {
  background: rgba(255,255,255,0.8);
  box-shadow: 0 24px 80px rgba(0,0,0,0.15), 0 0 0 1px rgba(124,58,237,0.15);
}
@keyframes wIn {
  from { opacity: 0; transform: translateY(40px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.welcome-logo {
  width: 90px; height: 90px; border-radius: 50%;
  background: var(--gradient-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.4rem; color: #fff;
  animation: glow-pulse 2.5s ease-in-out infinite;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
@keyframes glow-pulse {
  0%,100% { box-shadow: 0 0 24px var(--accent-glow), 0 0 0 0 var(--accent-dim); }
  50%      { box-shadow: 0 0 60px var(--accent-glow), 0 0 0 12px transparent; }
}

.welcome-card h1 {
  font-size: 3.2rem; font-weight: 900;
  letter-spacing: -2px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.welcome-card > p { color: var(--text-muted); font-size: 1rem; }

.welcome-btn {
  background: var(--gradient-accent); color: #fff;
  border: none; border-radius: 50px;
  padding: 14px 52px; font-size: 1rem; font-weight: 700;
  cursor: pointer;
  display: flex; align-items: center; gap: 10px;
  box-shadow: 0 6px 28px var(--accent-glow);
  font-family: inherit;
  transition: transform 0.2s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.2s ease;
}
.welcome-btn:hover {
  transform: scale(1.06);
  box-shadow: 0 8px 36px var(--accent-glow);
}
.welcome-sub { font-size: 0.74rem; color: var(--text-dim); }

/* ═══════════════════════════════════════════════════════════════════════════
   MODALS (Playlist + Shortcuts)
   ═══════════════════════════════════════════════════════════════════════════ */
#pl-modal, .shortcuts-modal {
  position: fixed; inset: 0; z-index: 5000;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
[data-theme="light"] #pl-modal,
[data-theme="light"] .shortcuts-modal { background: rgba(0,0,0,0.35); }
#pl-modal.open, .shortcuts-modal.open { opacity: 1; pointer-events: all; }

.pl-modal-inner, .shortcuts-inner {
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: modalIn 0.25s cubic-bezier(0.34,1.56,0.64,1);
}
@keyframes modalIn {
  from { transform: scale(0.9) translateY(20px); opacity: 0; }
  to   { transform: scale(1) translateY(0);      opacity: 1; }
}
.pl-modal-inner { width: 340px; max-height: 500px; display: flex; flex-direction: column; }
.shortcuts-inner { width: 380px; }

.pl-modal-header, .shortcuts-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 20px; border-bottom: 1px solid var(--border);
}
.pl-modal-header h3, .shortcuts-header h3 {
  font-size: 0.95rem; font-weight: 700;
}

#pl-modal-list { list-style: none; overflow-y: auto; flex: 1; padding: 8px 0; }
.pl-modal-item {
  padding: 11px 20px; cursor: pointer; font-size: 0.85rem;
  color: var(--text-muted); display: flex; align-items: center; gap: 10px;
}
.pl-modal-item:hover { background: var(--surface2); color: var(--text); }
.pl-modal-item.in-pl { color: var(--accent-text); }
.pl-modal-empty { padding: 16px 20px; color: var(--text-dim); font-size: 0.82rem; font-style: italic; }

.pl-modal-new {
  display: flex; gap: 8px; padding: 14px 16px;
  border-top: 1px solid var(--border);
}
.pl-modal-new input {
  flex: 1; background: var(--surface2); border: 1px solid var(--border-strong);
  border-radius: 8px; padding: 9px 13px; color: var(--text);
  font-size: 0.83rem; outline: none; font-family: inherit;
}
.pl-modal-new input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.pl-modal-new .upload-btn { padding: 9px 14px; border-radius: 8px; white-space: nowrap; width: auto; }

/* Shortcuts grid */
.shortcuts-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 2px; padding: 14px;
}
.shortcut-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: 8px;
  font-size: 0.82rem; color: var(--text-muted);
}
.shortcut-row:hover { background: var(--surface2); color: var(--text); }
kbd {
  background: var(--surface3); border: 1px solid var(--border-strong);
  border-radius: 6px; padding: 3px 8px;
  font-size: 0.73rem; font-family: inherit;
  color: var(--text); min-width: 30px; text-align: center;
  box-shadow: 0 2px 0 var(--surface4);
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  :root { --sidebar-w: 210px; }
  .main { padding: 22px 20px; }
  .search-box { width: 200px; }
  .search-box:focus-within { width: 230px; }
  .np-title { max-width: 150px; }
}

@media (max-width: 680px) {
  :root {
    --bar-h: 112px;
    --sidebar-w: 260px;
  }

  /* ── Layout ── */
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr var(--bar-h);
    height: 100vh;
    height: 100dvh;
  }

  /* ── Sidebar (off-canvas) ── */
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0;
    width: var(--sidebar-w); z-index: 300;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay { display: none; }
  .sidebar-overlay.open { display: block; }
  .mobile-menu-btn { display: flex; }

  /* ── Main ── */
  .main {
    grid-column: 1;
    padding: 18px 14px 14px;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
  }
  .main-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
  }
  .main-header-left { width: 100%; }
  .main-header h2 { font-size: 1.4rem; }
  .header-actions { width: 100%; }
  .search-box { width: 100%; transition: none; }
  .search-box:focus-within { width: 100%; }

  /* ── Now Playing Bar (stacked layout) ── */
  .now-playing {
    grid-column: 1;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    padding: 8px 14px 10px;
    gap: 4px;
    align-items: center;
  }
  .np-info { width: 100%; min-width: 0; }
  .np-title { max-width: none; }
  .np-controls { width: 100%; gap: 4px; }
  .control-btns { gap: 14px; }
  .progress-area { font-size: 0.65rem; gap: 7px; }
  .np-extra { display: none; }

  /* ── Song grid ── */
  .song-grid-inner {
    grid-template-columns: repeat(auto-fill, minmax(145px, 1fr));
    gap: 12px;
  }

  /* ── Misc ── */
  #visualizer-canvas { display: none; }
  .queue-panel {
    width: 100%; border-left: none;
    border-top: 1px solid var(--border);
    height: calc(100dvh - var(--bar-h));
  }
  .pl-modal-inner, .shortcuts-inner { width: calc(100vw - 32px); max-width: 380px; }
  .shortcuts-grid { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  :root { --bar-h: 120px; }

  .song-grid-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .control-btns { gap: 10px; }
  .play-main { width: 38px; height: 38px; font-size: 0.85rem; }
  .welcome-card { padding: 32px 20px; }
  .welcome-card h1 { font-size: 2.2rem; }
  .welcome-logo { width: 72px; height: 72px; font-size: 2rem; }
  .main { padding: 14px 10px; }
  .main-header h2 { font-size: 1.2rem; }
  .np-cover { width: 44px; height: 44px; font-size: 1.2rem; }
}

@media (max-width: 360px) {
  .control-btns { gap: 8px; }
  .icon-btn { font-size: 0.9rem; padding: 5px; }
  .play-main { width: 34px; height: 34px; }
  .song-grid-inner { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .card-cover { font-size: 2.2rem; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   AMBIENT COLOR ORBS
   ═══════════════════════════════════════════════════════════════════════════ */
.ambient-orbs {
  position: absolute; inset: 0;
  pointer-events: none; z-index: 0;
  overflow: hidden; border-radius: 0;
}
/* All real content sits above orbs */
.main-header, .song-grid, .drop-zone { position: relative; z-index: 1; }

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  transition: background 1.2s ease, opacity 1s ease, transform 1.2s ease;
  will-change: transform, opacity;
}
.orb.visible { opacity: 0.28; }
[data-theme="light"] .orb.visible { opacity: 0.18; }

.orb-1 {
  width: 420px; height: 420px;
  top: -120px; left: -80px;
  animation: orb-float-1 9s ease-in-out infinite alternate;
}
.orb-2 {
  width: 320px; height: 320px;
  top: 40%; right: -60px;
  animation: orb-float-2 11s ease-in-out infinite alternate;
}
.orb-3 {
  width: 260px; height: 260px;
  bottom: 60px; left: 30%;
  animation: orb-float-3 7s ease-in-out infinite alternate;
}

@keyframes orb-float-1 {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.1); }
}
@keyframes orb-float-2 {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(-30px, -40px) scale(1.08); }
}
@keyframes orb-float-3 {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(20px, -25px) scale(1.12); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SLEEP TIMER
   ═══════════════════════════════════════════════════════════════════════════ */
.sleep-timer-wrap {
  position: relative;
}

.sleep-menu {
  position: absolute; bottom: calc(100% + 12px); right: 0;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 8px;
  min-width: 148px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  opacity: 0; pointer-events: none;
  transform: translateY(8px) scale(0.95);
  transform-origin: bottom right;
  transition: opacity 0.2s ease, transform 0.25s cubic-bezier(0.34,1.56,0.64,1);
  z-index: 500;
}
.sleep-menu.open {
  opacity: 1; pointer-events: all;
  transform: translateY(0) scale(1);
}

.sleep-menu-title {
  font-size: 0.65rem; font-weight: 700;
  color: var(--text-dim); letter-spacing: 1.8px;
  text-transform: uppercase;
  padding: 4px 10px 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.sleep-opt {
  display: block; width: 100%;
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 0.84rem; font-weight: 600;
  padding: 9px 12px; border-radius: 8px; text-align: left;
  font-family: inherit;
  transition: background 0.15s, color 0.15s;
}
.sleep-opt:hover { background: var(--accent-dim); color: var(--accent-text); }
.sleep-opt[data-mins="0"] { color: var(--danger); }
.sleep-opt[data-mins="0"]:hover { background: var(--danger-dim); color: var(--danger); }

.sleep-countdown {
  font-size: 0.75rem; font-weight: 700;
  color: var(--accent-text);
  padding: 8px 12px 4px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* Active sleep btn glow */
#sleep-btn.active {
  color: var(--accent-text);
  animation: sleep-pulse 2s ease-in-out infinite;
}
@keyframes sleep-pulse {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   CONFIRM DIALOG (replaces browser confirm/prompt — works on iOS PWA)
   ═══════════════════════════════════════════════════════════════════════════ */
.confirm-dialog {
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.confirm-inner {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 24px 22px 20px;
  width: 100%; max-width: 320px;
  box-shadow: var(--shadow);
  animation: modalIn 0.2s cubic-bezier(0.34,1.56,0.64,1);
}
.confirm-msg {
  font-size: 0.95rem; font-weight: 700;
  color: var(--text); margin-bottom: 18px;
  line-height: 1.4;
}
.confirm-btns {
  display: flex; gap: 10px; justify-content: flex-end;
}
.confirm-no, .confirm-yes {
  border: none; border-radius: 8px;
  padding: 9px 20px; font-size: 0.85rem; font-weight: 700;
  cursor: pointer; font-family: inherit;
}
.confirm-no  { background: var(--surface3); color: var(--text-muted); }
.confirm-no:hover  { background: var(--surface4); color: var(--text); }
.confirm-yes { background: var(--danger); color: #fff; }
.confirm-yes:hover { opacity: 0.88; }
.confirm-yes.confirm-create { background: var(--gradient-accent); }

/* ── Categories ─────────────────────────────────────────────────────────────── */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  padding: 8px 0 24px;
}

.category-card {
  position: relative;
  border-radius: 16px;
  padding: 24px 18px 20px;
  cursor: pointer;
  background: linear-gradient(135deg, var(--cat-color, #7c3aed) 0%, color-mix(in srgb, var(--cat-color, #7c3aed) 60%, #0b0b0f) 100%);
  border: 1px solid rgba(255,255,255,0.1);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  overflow: hidden;
  user-select: none;
}

.category-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.35);
  border-radius: inherit;
  transition: background 0.18s;
}

.category-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 32px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.15);
}

.category-card:hover::before { background: rgba(0,0,0,0.2); }

.category-card > * { position: relative; z-index: 1; }

.cat-emoji {
  font-size: 2.2rem;
  margin-bottom: 10px;
  display: block;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.4));
}

.cat-label {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
  line-height: 1.2;
}

.cat-desc {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 10px;
  line-height: 1.4;
}

.cat-count {
  font-size: 0.7rem;
  font-weight: 600;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Lo-Fi badge on song cards */
.song-card[data-lofi="true"] .card-cover::after {
  content: 'SYNTH';
  position: absolute;
  bottom: 4px;
  right: 4px;
  font-size: 0.55rem;
  font-weight: 700;
  background: rgba(0,0,0,0.6);
  color: #c4b5fd;
  padding: 2px 5px;
  border-radius: 4px;
  letter-spacing: 0.06em;
}