/* ---------- Design tokens ---------- */
:root {
  --bg: #0b1220;
  --bg-2: #101a2e;
  --bg-3: #16233c;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-2: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.09);
  --text: #e8eef7;
  --muted: #8fa0b8;
  --accent: #38e1c8;
  --accent-2: #f0a750;
  --danger: #ff6b7a;
  --radius: 12px;
  --player-h: 84px;
  --sidebar-w: 232px;
  font-size: 15px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI Variable", "Segoe UI", Roboto, Inter, sans-serif;
  background: radial-gradient(1200px 700px at 75% -10%, #16304a 0%, var(--bg) 55%) fixed;
  color: var(--text);
  overflow: hidden;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.mono { font-variant-numeric: tabular-nums; font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; }
.error { color: var(--danger); font-size: 0.9rem; }
.flex-spacer { flex: 1; }
hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }

/* ---------- Buttons & inputs ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 9px;
  cursor: pointer;
  font: inherit;
  font-size: 0.92rem;
  transition: background 0.15s, border-color 0.15s, transform 0.06s;
}
.btn:hover { background: var(--surface-2); border-color: rgba(255,255,255,0.18); }
.btn:active { transform: scale(0.98); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), #1fb8d8);
  border: none; color: #06281f; font-weight: 650;
}
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; }
.btn.wide { width: 100%; }
.btn.small-btn { padding: 5px 11px; font-size: 0.82rem; }
.btn.active { border-color: var(--accent); color: var(--accent); }

.icon-btn {
  background: none; border: none; color: var(--text); cursor: pointer;
  padding: 6px; border-radius: 8px; line-height: 0; font-size: 0.95rem;
}
.icon-btn:hover { background: var(--surface-2); }
.icon-btn svg { width: 22px; height: 22px; }
.play-btn {
  background: var(--text); color: var(--bg); border-radius: 50%;
  width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center;
}
.play-btn:hover { background: #fff; transform: scale(1.04); }
.play-btn svg { width: 20px; height: 20px; }

input[type="password"], input[type="text"], input[type="number"], input[type="search"], .select {
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 9px;
  padding: 9px 12px;
  font: inherit;
  outline: none;
}
input:focus-visible, .select:focus-visible { border-color: var(--accent); }
.select { padding: 6px 10px; font-size: 0.86rem; }

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  height: 4px; border-radius: 2px;
  background: linear-gradient(to right, var(--accent) var(--fill, 0%), rgba(255,255,255,0.15) var(--fill, 0%));
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 13px; height: 13px; border-radius: 50%;
  background: #fff; border: none;
  transition: transform 0.1s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.25); }
input[type="range"]::-moz-range-thumb {
  width: 13px; height: 13px; border-radius: 50%; background: #fff; border: none;
}

input[type="checkbox"] { accent-color: var(--accent); width: 17px; height: 17px; }

/* Toggle switch */
.switch { position: relative; display: inline-block; width: 40px; height: 22px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider-toggle {
  position: absolute; inset: 0; border-radius: 22px;
  background: rgba(255,255,255,0.16); transition: 0.18s; cursor: pointer;
}
.slider-toggle::before {
  content: ""; position: absolute; width: 16px; height: 16px; border-radius: 50%;
  left: 3px; top: 3px; background: #fff; transition: 0.18s;
}
.switch input:checked + .slider-toggle { background: var(--accent); }
.switch input:checked + .slider-toggle::before { transform: translateX(18px); }

/* ---------- Auth screens ---------- */
.screen {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  z-index: 50; background: radial-gradient(900px 600px at 50% 20%, #14283f 0%, var(--bg) 70%);
}
.auth-card {
  width: min(400px, 90vw);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 34px 32px;
  backdrop-filter: blur(12px);
  display: flex; flex-direction: column; gap: 14px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}
.logo-block { display: flex; align-items: center; gap: 12px; }
.logo-block h1 { font-size: 1.5rem; margin: 0; font-weight: 700; letter-spacing: -0.02em; }
.logo-block h1 span { color: var(--accent); }
.logo-block.small h1 { font-size: 1.12rem; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px; flex: none;
  background:
    radial-gradient(circle at 34% 55%, var(--accent) 0 4px, transparent 5px),
    radial-gradient(circle at 66% 40%, var(--accent-2) 0 4px, transparent 5px),
    linear-gradient(150deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--border);
}
.link-big {
  color: var(--accent); font-size: 1.05rem; word-break: break-all; text-align: center;
  text-decoration: none; padding: 10px; border: 1px dashed rgba(56,225,200,0.4); border-radius: 10px;
}
.link-big:hover { background: rgba(56,225,200,0.08); }
.subtle-link { color: var(--muted); text-decoration: underline; }
.subtle-link:hover { color: var(--text); }
.link-steps { color: var(--muted); font-size: 0.88rem; line-height: 1.5; padding-left: 20px; margin: 4px 0; }
.link-steps li { margin-bottom: 6px; }
#tidal-pkce-active { display: flex; flex-direction: column; gap: 12px; }
.user-code {
  text-align: center; font-family: ui-monospace, Consolas, monospace;
  font-size: 1.7rem; letter-spacing: 0.35em; color: var(--accent-2); padding: 6px 0 2px;
}
.spinner {
  display: inline-block; width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid var(--muted); border-top-color: transparent;
  animation: spin 0.8s linear infinite; vertical-align: -2px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- App layout ---------- */
#app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr auto;
  grid-template-rows: 1fr var(--player-h);
  grid-template-areas: "sidebar main queue" "player player player";
  height: 100vh;
}
#sidebar {
  grid-area: sidebar;
  display: flex; flex-direction: column; gap: 20px;
  padding: 20px 14px;
  border-right: 1px solid var(--border);
  background: rgba(6, 10, 20, 0.35);
}
#nav { display: flex; flex-direction: column; gap: 3px; }
#nav a {
  display: flex; align-items: center; gap: 12px;
  color: var(--muted); text-decoration: none;
  padding: 10px 12px; border-radius: 9px; font-weight: 550; font-size: 0.95rem;
  transition: 0.14s;
}
#nav a svg { width: 19px; height: 19px; }
#nav a:hover { color: var(--text); background: var(--surface); }
#nav a.active { color: var(--accent); background: rgba(56,225,200,0.09); }
.sidebar-foot { margin-top: auto; }

#main { grid-area: main; overflow-y: auto; padding: 26px 30px 40px; }
#view { max-width: 1100px; margin: 0 auto; }

/* ---------- Views ---------- */
.view-title { font-size: 1.55rem; font-weight: 700; margin: 4px 0 18px; letter-spacing: -0.02em; }
.view-sub { font-size: 1.05rem; font-weight: 650; margin: 26px 0 10px; }

.search-box { width: 100%; font-size: 1.05rem; padding: 13px 18px; border-radius: 12px; margin-bottom: 18px; }

.tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tabs .btn { border-radius: 999px; }

.hero {
  display: flex; gap: 22px; align-items: flex-end; margin-bottom: 24px;
}
.hero img {
  width: 168px; height: 168px; border-radius: 12px; object-fit: cover;
  box-shadow: 0 16px 40px rgba(0,0,0,0.5);
}
.hero .hero-info h2 { margin: 0 0 6px; font-size: 1.7rem; letter-spacing: -0.02em; }
.hero .hero-meta { color: var(--muted); font-size: 0.92rem; }
.hero .btn { margin-top: 14px; }

/* Track list */
.track-list { display: flex; flex-direction: column; }
.track-row {
  display: grid;
  grid-template-columns: 34px 42px minmax(0, 1fr) minmax(0, 0.8fr) 44px 52px;
  align-items: center; gap: 12px;
  padding: 7px 10px; border-radius: 9px;
  cursor: pointer; user-select: none;
}
.track-row:hover { background: var(--surface); }
.track-row.playing { background: rgba(56,225,200,0.09); }
.track-row.playing .t-title { color: var(--accent); }
.track-row.unavailable { opacity: 0.4; }
.t-idx { color: var(--muted); font-size: 0.85rem; text-align: right; }
.t-art { width: 42px; height: 42px; border-radius: 6px; object-fit: cover; background: var(--bg-3); }
.t-main { min-width: 0; }
.t-title { font-weight: 550; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.t-artist, .t-album { color: var(--muted); font-size: 0.86rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.t-dur { color: var(--muted); font-size: 0.85rem; text-align: right; }
.heart { color: var(--muted); font-size: 1.05rem; }
.heart.faved { color: var(--accent); }
.heart:hover { color: var(--text); }
.heart.faved:hover { color: var(--accent); filter: brightness(1.2); }

/* Cards grid */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(158px, 1fr));
  gap: 18px;
}
.card { cursor: pointer; border-radius: 12px; padding: 12px; transition: background 0.15s; }
.card:hover { background: var(--surface); }
.card img {
  width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 9px;
  background: var(--bg-3); margin-bottom: 10px;
}
.card.round img { border-radius: 50%; }
.card .c-title { font-weight: 550; font-size: 0.92rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card .c-sub { color: var(--muted); font-size: 0.82rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.load-more { margin: 18px auto; display: block; }
.empty-note { color: var(--muted); padding: 30px 0; text-align: center; }

/* ---------- Player bar ---------- */
#player-bar {
  grid-area: player;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, 1.4fr) minmax(0, 1fr);
  align-items: center; gap: 16px;
  padding: 0 18px;
  border-top: 1px solid var(--border);
  background: rgba(8, 13, 24, 0.92);
  backdrop-filter: blur(14px);
  z-index: 30;
}
.now-playing { display: flex; align-items: center; gap: 12px; min-width: 0; }
.np-art { width: 54px; height: 54px; border-radius: 8px; object-fit: cover; }
.np-text { min-width: 0; }
.np-title { font-weight: 600; font-size: 0.95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.np-artist { font-size: 0.84rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.player-center { display: flex; flex-direction: column; gap: 4px; padding: 10px 0; }
.transport { display: flex; align-items: center; justify-content: center; gap: 14px; }
.seek-row { display: flex; align-items: center; gap: 10px; }
.seek-row input { flex: 1; }
.player-right { display: flex; align-items: center; justify-content: flex-end; gap: 10px; }
.player-right #volume { width: 96px; }
.vol-icon { width: 19px; height: 19px; color: var(--muted); flex: none; }
.badge {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.06em;
  color: var(--accent-2); border: 1px solid rgba(240,167,80,0.5);
  padding: 2px 7px; border-radius: 5px;
}
.eq-btn.eq-on { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 10px rgba(56,225,200,0.25); }
.mode-btn { color: var(--muted); position: relative; }
.mode-btn svg { width: 17px; height: 17px; }
.mode-btn.active { color: var(--accent); }
#repeat-one-badge {
  position: absolute; top: 0; right: 0;
  font-size: 0.55rem; font-weight: 800; color: var(--accent);
  background: var(--bg-2); border-radius: 50%;
  width: 11px; height: 11px; line-height: 11px; text-align: center;
}

/* ---------- Queue panel ---------- */
#queue-panel {
  grid-area: queue;
  width: 320px; overflow-y: auto;
  border-left: 1px solid var(--border);
  background: rgba(6, 10, 20, 0.5);
  padding: 16px;
}
.panel-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.panel-head h2 { font-size: 1.02rem; margin: 0; margin-right: auto; }
.q-row {
  display: flex; align-items: center; gap: 10px; padding: 6px 8px;
  border-radius: 8px; cursor: pointer;
}
.q-row:hover { background: var(--surface); }
.q-row.current { background: rgba(56,225,200,0.09); }
.q-row img { width: 36px; height: 36px; border-radius: 5px; }
.q-row .t-main { flex: 1; min-width: 0; }

/* ---------- EQ panel ---------- */
#eq-panel {
  position: fixed; left: 0; right: 0; bottom: var(--player-h);
  background: rgba(8, 13, 24, 0.97);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(16px);
  padding: 14px 22px 18px;
  z-index: 25;
  max-height: calc(100vh - var(--player-h) - 40px);
  overflow-y: auto;
  box-shadow: 0 -18px 50px rgba(0,0,0,0.5);
  animation: slide-up 0.22s ease;
}
@keyframes slide-up { from { transform: translateY(24px); opacity: 0; } to { transform: none; opacity: 1; } }

#eq-canvas {
  width: 100%; height: 220px; display: block;
  border-radius: 10px; background: rgba(0,0,0,0.28);
  border: 1px solid var(--border);
  touch-action: none;
  cursor: crosshair;
}
.eq-controls { margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }
.preamp-row { display: flex; align-items: center; gap: 12px; }
.preamp-row label { color: var(--muted); font-size: 0.86rem; }
.preamp-row input[type="range"] { width: 220px; }

#eq-bands { display: flex; flex-direction: column; gap: 5px; }
.band-row {
  display: grid;
  grid-template-columns: 14px 110px 1fr 1fr 1fr 30px;
  gap: 10px; align-items: center;
  padding: 5px 8px; border-radius: 8px;
}
.band-row:hover, .band-row.selected { background: var(--surface); }
.band-row.selected { outline: 1px solid rgba(56,225,200,0.35); }
.band-row.disabled { opacity: 0.45; }
.band-dot { width: 10px; height: 10px; border-radius: 50%; }
.band-field { display: flex; align-items: center; gap: 6px; }
.band-field label { color: var(--muted); font-size: 0.72rem; width: 34px; text-align: right; }
.band-field input { width: 100%; padding: 4px 8px; font-size: 0.84rem; }
.band-row .select { font-size: 0.8rem; padding: 4px 6px; }
.band-x { color: var(--muted); }
.band-x:hover { color: var(--danger); }

/* ---------- Modal & toasts ---------- */
#modal-backdrop {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center;
}
.modal {
  width: min(460px, 92vw);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 16px; padding: 20px 22px;
  box-shadow: 0 24px 70px rgba(0,0,0,0.6);
}
.settings-body { display: flex; flex-direction: column; gap: 4px; }
.setting-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 0; gap: 14px; font-size: 0.94rem;
}

#toasts {
  position: fixed; bottom: calc(var(--player-h) + 14px); left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; gap: 8px; z-index: 70;
  pointer-events: none;
}
.toast {
  background: var(--bg-3); border: 1px solid var(--border);
  padding: 10px 18px; border-radius: 10px; font-size: 0.9rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  animation: toast-in 0.2s ease;
}
.toast.error { border-color: rgba(255,107,122,0.5); color: var(--danger); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- Scrollbars ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.13); border-radius: 5px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background-color: rgba(255,255,255,0.22); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  :root { --sidebar-w: 64px; }
  #sidebar .logo-block h1, #nav a span, .sidebar-foot { display: none; }
  #nav a { justify-content: center; padding: 12px; font-size: 0; gap: 0; }
  #nav a svg { width: 22px; height: 22px; }
  #queue-panel { position: fixed; right: 0; top: 0; bottom: var(--player-h); z-index: 26; }
  #player-bar { grid-template-columns: minmax(0, 1fr) auto; }
  .player-right #volume, .vol-icon, #quality-badge { display: none; }
  .track-row { grid-template-columns: 42px minmax(0, 1fr) 44px 52px; }
  .t-idx, .t-album { display: none; }
}