:root {
  --ink: #e9f1dc;
  --ink-dim: rgba(233, 241, 220, 0.58);
  --ink-faint: rgba(233, 241, 220, 0.28);
  --glow: #dcff7a;
  --glow-soft: rgba(220, 255, 122, 0.35);
  --amber: #ffcb66;
  --panel: rgba(6, 10, 8, 0.55);
  --line: rgba(233, 241, 220, 0.12);
  --bar: clamp(28px, 7.5vh, 84px);
  --serif: 'Cormorant Garamond', 'Iowan Old Style', Georgia, serif;
  --sans: 'Manrope', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --level: 0;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #020403;
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

button { font: inherit; color: inherit; }
p { margin: 0; }

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0;
  transition: opacity 3s ease;
}
body.ready #scene { opacity: 1; }
body.idle, body.idle * { cursor: none !important; }

/* ---------------------------------------------------------------- letterbox */

.bars { position: fixed; inset: 0; pointer-events: none; z-index: 2; }
.bar {
  position: absolute;
  left: 0; right: 0;
  height: var(--bar);
  background: #000;
  transform: scaleY(0);
  transition: transform 2.4s var(--ease);
}
.bar-top { top: 0; transform-origin: top; }
.bar-bottom { bottom: 0; transform-origin: bottom; }
body.entered .bar { transform: scaleY(1); }

/* -------------------------------------------------------------- begin hint */

.begin {
  position: fixed;
  z-index: 6;
  left: 50%;
  top: 58%;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 26px 14px 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 16, 12, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 11.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink);
  transform: translate(-50%, 8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 1.2s var(--ease), transform 1.2s var(--ease);
}
.begin.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; cursor: pointer; transition-delay: 1.2s; }
.begin-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 10px var(--glow), 0 0 24px var(--glow-soft);
  animation: flash 2.8s ease-in-out infinite;
}
body.idle .begin.show { opacity: 1; }

@keyframes flash { 0%, 100% { opacity: 0.25; transform: scale(0.8); } 12% { opacity: 1; transform: scale(1.15); } 40% { opacity: 0.45; } }

/* ---------------------------------------------------------------- HUD shell */

.hud {
  position: fixed;
  left: 0; right: 0;
  z-index: 5;
  opacity: 0;
  pointer-events: none;
  transition: opacity 1.4s var(--ease), transform 1.4s var(--ease);
}
body.entered .hud { opacity: 1; pointer-events: auto; }
body.entered.idle .hud, body.entered.hide-ui .hud { opacity: 0; pointer-events: none; }
body.entered.idle .hud-top, body.entered.hide-ui .hud-top { transform: translateY(-8px); }
body.entered.idle .player, body.entered.hide-ui .player { transform: translateY(8px); }

.hud-top {
  top: 0;
  height: var(--bar);
  min-height: 52px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 max(16px, env(safe-area-inset-right)) 0 max(16px, env(safe-area-inset-left));
  padding-top: env(safe-area-inset-top);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.08em;
}
.brand-mark {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 calc(8px + var(--level) * 18px) var(--glow), 0 0 calc(16px + var(--level) * 30px) var(--glow-soft);
  opacity: calc(0.5 + var(--level) * 0.5);
}

.slate {
  font-size: 10.5px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--ink-dim);
  white-space: nowrap;
  transition: opacity 1.2s var(--ease), filter 1.2s var(--ease);
}
.slate.swap { opacity: 0; filter: blur(6px); }

.top-actions { display: flex; justify-content: flex-end; gap: 4px; }

.icon-btn {
  position: relative;
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--ink-dim);
  cursor: pointer;
  transition: color 0.4s var(--ease), background 0.4s var(--ease);
}
.icon-btn svg { width: 20px; height: 20px; }
.icon-btn.small svg { width: 18px; height: 18px; }
.icon-btn:hover { color: var(--ink); background: rgba(233, 241, 220, 0.06); }
.icon-btn:focus-visible, .play:focus-visible, .progress:focus-visible, .track:focus-visible {
  outline: 1px solid rgba(220, 255, 122, 0.6);
  outline-offset: 2px;
}
.icon-btn[aria-pressed='true'], .icon-btn[data-mode='all'], .icon-btn[data-mode='one'], .icon-btn[aria-expanded='true'] {
  color: var(--glow);
}
.icon-btn[aria-pressed='true']::after, .icon-btn[data-mode='all']::after, .icon-btn[data-mode='one']::after {
  content: '';
  position: absolute;
  bottom: 4px;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 6px var(--glow);
}
.repeat-one {
  position: absolute;
  top: 7px; right: 6px;
  font-size: 9px;
  font-weight: 600;
  display: none;
}
.icon-btn[data-mode='one'] .repeat-one { display: block; }

/* ------------------------------------------------------------------- player */

.player {
  bottom: 0;
  padding: 0 max(20px, env(safe-area-inset-right)) max(14px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
  background: linear-gradient(to top, rgba(0, 0, 0, 0.92) 0%, rgba(0, 0, 0, 0.6) 55%, transparent);
}

.progress {
  position: relative;
  height: 22px;
  margin: 0 -4px;
  cursor: pointer;
  touch-action: none;
}
.progress-track, .progress-fill {
  position: absolute;
  left: 4px; right: 4px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}
.progress-track { background: var(--line); }
.progress-fill {
  right: auto;
  width: 0;
  background: linear-gradient(90deg, rgba(220, 255, 122, 0.05), rgba(220, 255, 122, 0.75));
  transition: height 0.4s var(--ease);
}
.progress:hover .progress-fill, .progress.dragging .progress-fill { height: 2px; }
.progress-head {
  position: absolute;
  right: -3px; top: 50%;
  width: 6px; height: 6px;
  border-radius: 50%;
  transform: translateY(-50%) scale(calc(1 + var(--level) * 0.9));
  background: #f7ffdc;
  box-shadow: 0 0 8px var(--glow), 0 0 calc(14px + var(--level) * 26px) var(--glow-soft);
}
.progress-tip {
  position: absolute;
  bottom: 100%;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(8, 12, 10, 0.8);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  transform: translateX(-50%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.progress:hover .progress-tip, .progress.dragging .progress-tip { opacity: 1; }
.progress.disabled { cursor: default; }
.progress.disabled .progress-tip { display: none; }

.player-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding-top: 4px;
}

.now { min-width: 0; }
.now-index {
  font-size: 10.5px;
  letter-spacing: 0.3em;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}
.now-title {
  margin-top: 4px;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(22px, 2.3vw, 30px);
  line-height: 1.1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.now-artist {
  margin-top: 3px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.controls { display: flex; align-items: center; gap: 6px; }
.play {
  display: grid;
  place-items: center;
  width: 58px; height: 58px;
  margin: 0 6px;
  padding: 0;
  border: 1px solid rgba(220, 255, 122, calc(0.25 + var(--level) * 0.5));
  border-radius: 50%;
  background: radial-gradient(circle, rgba(220, 255, 122, calc(0.05 + var(--level) * 0.14)), rgba(220, 255, 122, 0.02) 70%);
  box-shadow: 0 0 calc(12px + var(--level) * 40px) rgba(220, 255, 122, calc(0.08 + var(--level) * 0.25));
  color: #f4ffd6;
  cursor: pointer;
  transition: transform 0.4s var(--ease), border-color 0.2s;
}
.play:hover { transform: scale(1.05); }
.play:active { transform: scale(0.97); }
.play svg { width: 22px; height: 22px; }

.aux { display: flex; justify-content: flex-end; align-items: center; gap: 18px; }
.time {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--ink-dim);
  white-space: nowrap;
}
.time-sep { margin: 0 6px; color: var(--ink-faint); }

.volume { display: flex; align-items: center; gap: 2px; }
.volume input {
  -webkit-appearance: none;
  appearance: none;
  width: 92px;
  height: 20px;
  background: transparent;
  cursor: pointer;
  --v: 80%;
}
.volume input::-webkit-slider-runnable-track {
  height: 1px;
  background: linear-gradient(90deg, rgba(233, 241, 220, 0.7) var(--v), var(--line) var(--v));
}
.volume input::-moz-range-track { height: 1px; background: var(--line); }
.volume input::-moz-range-progress { height: 1px; background: rgba(233, 241, 220, 0.7); }
.volume input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 9px; height: 9px;
  margin-top: -4px;
  border-radius: 50%;
  background: var(--ink);
  border: 0;
}
.volume input::-moz-range-thumb { width: 9px; height: 9px; border-radius: 50%; background: var(--ink); border: 0; }
.volume input:focus-visible { outline: 1px solid rgba(220, 255, 122, 0.6); outline-offset: 2px; }

/* -------------------------------------------------------------- the grove */

.grove {
  position: fixed;
  z-index: 8;
  top: calc(var(--bar) + 8px);
  bottom: 128px;
  right: 16px;
  width: min(380px, calc(100vw - 32px));
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  backdrop-filter: blur(22px) saturate(1.2);
  -webkit-backdrop-filter: blur(22px) saturate(1.2);
  opacity: 0;
  transform: translateX(24px);
  visibility: hidden;
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease), visibility 0s linear 0.7s;
}
.grove.open { opacity: 1; transform: none; visibility: visible; transition-delay: 0s; }

.grove-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 20px 14px 14px 22px;
  border-bottom: 1px solid var(--line);
}
.grove h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  font-size: 28px;
}
.grove-count {
  margin-top: 2px;
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.tracklist {
  flex: 1;
  margin: 0;
  padding: 8px;
  list-style: none;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.track {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background 0.3s var(--ease);
}
.track:hover { background: rgba(233, 241, 220, 0.05); }
.track-n {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-faint);
}
.track-meta { min-width: 0; }
.track-title {
  display: block;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.track-artist {
  display: block;
  margin-top: 1px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.track-dur { font-size: 11px; color: var(--ink-faint); font-variant-numeric: tabular-nums; }
.track.current { background: rgba(220, 255, 122, 0.06); }
.track.current .track-title { color: #f4ffd6; font-style: italic; }
.track.current .track-n { color: transparent; position: relative; }
.track.current .track-n::after {
  content: '';
  position: absolute;
  left: 3px; top: 50%;
  width: 6px; height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 calc(6px + var(--level) * 16px) var(--glow);
  transform: scale(calc(0.8 + var(--level) * 0.8));
}
.track.local .track-artist::before { content: 'dropped · '; color: var(--amber); }

.grove-empty {
  padding: 22px 16px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  line-height: 1.45;
  color: var(--ink-dim);
}
.grove-empty code, .grove-foot code {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-style: normal;
  font-size: 0.8em;
  padding: 1px 6px;
  border-radius: 5px;
  background: rgba(233, 241, 220, 0.08);
  color: var(--ink);
}

.grove-foot {
  padding: 14px 22px 18px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-faint);
}

/* ------------------------------------------------------------ title card */

.titlecard {
  position: fixed;
  z-index: 4;
  left: 50%;
  top: 44%;
  width: min(900px, calc(100vw - 32px));
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 2.4s var(--ease), filter 2.4s var(--ease);
  filter: blur(10px);
}
.titlecard.show { opacity: 1; filter: blur(0); }
.titlecard-eyebrow {
  font-size: 10.5px;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.titlecard-title {
  margin-top: 14px;
  font-family: var(--serif);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(38px, 6.5vw, 92px);
  line-height: 1;
  text-shadow: 0 0 40px rgba(0, 0, 0, 0.8), 0 0 80px rgba(220, 255, 122, 0.08);
}
.titlecard-artist {
  margin-top: 16px;
  font-size: 12px;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* --------------------------------------------------------- harmonograph */

.harmony { position: fixed; inset: 0; z-index: 3; pointer-events: none; transition: opacity 1.2s var(--ease); }
.harmony.off { opacity: 0; }
.axis-label, .harmony-chord {
  position: absolute;
  left: 0; top: 0;
  will-change: transform;
  transition: opacity 0.6s var(--ease);
}
.axis-label {
  width: 0; height: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #ffb892;
  text-shadow: 0 0 10px rgba(255, 130, 80, 0.8), 0 0 22px rgba(255, 110, 90, 0.4);
  white-space: nowrap;
  display: flex;
  align-items: center;
  justify-content: center;
}
.harmony-chord { width: 0; display: flex; flex-direction: column; align-items: center; text-align: center; }
.harmony-notes, .harmony-ratio { white-space: nowrap; }
.harmony-notes {
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  color: #ffe6d4;
  text-shadow: 0 0 14px rgba(255, 140, 90, 0.45);
}
.harmony-ratio {
  margin-top: 3px;
  font-size: 9.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 205, 180, 0.62);
}
.harmony .axis-label, .harmony .harmony-notes, .harmony .harmony-ratio { transition: opacity 0.5s var(--ease), filter 0.5s var(--ease); }
.harmony.swap .axis-label, .harmony.swap .harmony-notes, .harmony.swap .harmony-ratio { opacity: 0; filter: blur(5px); }

/* --------------------------------------------------------- drop & toast */

.drop {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  background: rgba(2, 4, 3, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
}
.drop p {
  padding: 28px 40px;
  border: 1px dashed rgba(220, 255, 122, 0.45);
  border-radius: 20px;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(22px, 3vw, 32px);
}
body.dragging .drop { opacity: 1; }

.toast {
  position: fixed;
  z-index: 25;
  left: 50%;
  top: calc(var(--bar) + 16px);
  max-width: calc(100vw - 32px);
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(8, 12, 10, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 12.5px;
  color: var(--ink);
  transform: translate(-50%, -8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.noscript { position: fixed; inset: 0; display: grid; place-items: center; font-family: var(--serif); font-size: 22px; }

/* ---------------------------------------------------------------- mobile */

@media (max-width: 760px) {
  .harmony-notes { font-size: 16px; }
  .harmony-ratio { font-size: 8.5px; letter-spacing: 0.22em; }
  :root { --bar: clamp(22px, 5vh, 48px); }
  .slate { display: none; }
  .hud-top { grid-template-columns: 1fr auto; }
  .player-row {
    grid-template-columns: 1fr;
    gap: 10px;
    text-align: center;
  }
  .now { order: 0; }
  .controls { order: 1; justify-content: center; }
  .aux { order: 2; justify-content: space-between; }
  .volume input { width: 110px; }
  .grove { top: auto; bottom: 0; right: 0; left: 0; width: 100%; height: 72vh; border-radius: 20px 20px 0 0; transform: translateY(24px); }
}

@media (prefers-reduced-motion: reduce) {
  .begin-dot { animation: none; }
}