:root {
  --bg: #0d0f12;
  --glass: rgba(255, 255, 255, 0.05);
  --edge: rgba(255, 255, 255, 0.12);
  --text: #ecebe6;
  --dim: #8d9096;
  --accent: #2de0c0;
  --warm: #ff9a3d;
  --hot: #ff4f5e;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(60rem 40rem at 15% -10%, rgba(45, 224, 192, 0.14), transparent 60%),
    radial-gradient(50rem 35rem at 100% 110%, rgba(255, 154, 61, 0.14), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 400 16px/1.5 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 2.5rem 16px 2rem;
}

h1, h2, button { font-family: inherit; font-weight: 700; }

h1 {
  margin: 0;
  font-size: 2.2rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
h1 span {
  background: linear-gradient(90deg, var(--warm), var(--hot));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede { margin: 0.25rem 0 1.5rem; color: var(--dim); }

.deck {
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  border: 1px solid var(--edge);
  border-radius: 20px;
  background: var(--glass);
  backdrop-filter: blur(12px);
  box-shadow: 0 0 40px rgba(255, 154, 61, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

#meter {
  position: absolute;
  inset: auto 0 0 0;
  width: 100%;
  height: 70%;
  opacity: 0.28;
  pointer-events: none;
}

.now, .seek, .controls { position: relative; }
.now h2 {
  margin: 0;
  font-size: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-shadow: 0 0 18px rgba(45, 224, 192, 0.6);
}
#meta { margin: 0; color: var(--accent); font-size: 0.9rem; letter-spacing: 0.05em; }
#about { margin: 0.6rem 0 0.75rem; color: var(--dim); min-height: 3em; font-size: 0.95rem; }

.where {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 2rem;
  margin-bottom: 0.75rem;
}
#section { flex: 1 1 14rem; margin: 0; color: var(--warm); font-size: 0.85rem; }
#temper { flex: none; }
#temper[data-equal] { color: var(--warm); }

.seek {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--dim);
}
.seek span { min-width: 2.6rem; }
.seek span:last-child { text-align: right; }

input[type=range] {
  flex: 1;
  min-width: 0;
  height: 20px;
  margin: 0;
  background: transparent;
  accent-color: var(--warm);
  cursor: pointer;
}

.controls {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}
.transport { display: flex; align-items: center; gap: 0.75rem; }

button {
  border: 1px solid var(--edge);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
}
button:hover { background: rgba(255, 255, 255, 0.12); }
button:active { transform: scale(0.95); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button:disabled { opacity: 0.4; cursor: default; }

.round {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: 50%;
}
.round svg { width: 22px; height: 22px; fill: currentColor; }
.round.big {
  width: 64px;
  height: 64px;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--warm) 55%, var(--hot));
  box-shadow: 0 0 24px rgba(255, 154, 61, 0.6);
  color: #fff;
}
.round.big:hover { box-shadow: 0 0 34px rgba(255, 79, 94, 0.7); }
.round.big svg { width: 28px; height: 28px; }
#play .i-pause, #play.playing .i-play { display: none; }
#play.playing .i-pause { display: block; }

.pill {
  justify-self: start;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
}

.level {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: 100%;
  max-width: 9rem;
  color: var(--dim);
}
.level svg { flex: none; width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round; stroke-linecap: round; }

.tracks {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}
.tracks button {
  display: grid;
  grid-template-columns: 1.75rem 1fr auto auto;
  align-items: baseline;
  gap: 0.75rem;
  width: 100%;
  padding: 0.7rem 1rem;
  margin-bottom: 0.4rem;
  border-radius: 12px;
  background: var(--glass);
  text-align: left;
  font-weight: 400;
}
.tracks .num { color: var(--dim); font-variant-numeric: tabular-nums; }
.tracks .name { font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.tracks .spec { color: var(--dim); font-size: 0.85rem; }
.tracks .len { color: var(--dim); font-size: 0.85rem; font-variant-numeric: tabular-nums; }
.tracks .on button {
  border-color: rgba(255, 154, 61, 0.7);
  box-shadow: 0 0 16px rgba(255, 154, 61, 0.3);
}
.tracks .on .num, .tracks .on .name { color: var(--accent); }

footer {
  margin-top: 1.5rem;
  color: var(--dim);
  font-size: 0.8rem;
  text-align: center;
}

@media (max-width: 30rem) {
  .deck { padding: 1.1rem; }
  .now h2 { font-size: 1.6rem; }
  .controls { grid-template-columns: 1fr 1fr; }
  .transport { grid-column: 1 / -1; grid-row: 1; justify-content: center; }
  .tracks .spec { display: none; }
  .tracks button { grid-template-columns: 1.75rem 1fr auto; }
}