:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1f2630;
  --line: #2b333d;
  --ink: #e6edf3;
  --muted: #8b96a5;
  --accent: #4cc9f0;
  --work: #f72585;
  --rest: #4cc9f0;
  --player-h: 8.5rem;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-bottom: calc(var(--player-h) + env(safe-area-inset-bottom));
  -webkit-font-smoothing: antialiased;
}

.top {
  padding: 1.5rem 1rem 0.5rem;
  max-width: 72rem;
  margin: 0 auto;
}
.top h1 { margin: 0; font-size: 1.6rem; letter-spacing: -0.01em; }
.tagline { margin: 0.25rem 0 0; color: var(--muted); }

.filters {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 0.75rem 1rem;
  margin-top: 0.5rem;
}
.filter-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem 0.75rem;
  max-width: 72rem;
  margin: 0 auto;
}
@media (min-width: 640px) {
  .filter-row { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.field { display: flex; flex-direction: column; gap: 0.2rem; font-size: 0.75rem; color: var(--muted); }
.field select {
  appearance: none;
  background: var(--panel-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.65rem 0.6rem;
  font: inherit;
  font-size: 0.9rem;
}
.count { max-width: 72rem; margin: 0.6rem auto 0; color: var(--muted); font-size: 0.8rem; }

main { max-width: 72rem; margin: 0 auto; padding: 0 1rem; }

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  padding: 1rem 0 2rem;
}
@media (min-width: 560px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .grid { grid-template-columns: repeat(3, 1fr); } }

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--card-accent, var(--accent));
  border-radius: 0.75rem;
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: border-color 0.15s ease, transform 0.05s ease;
}
.card:hover { border-color: var(--card-accent, var(--accent)); }
.card.playing { box-shadow: 0 0 0 1px var(--card-accent, var(--accent)) inset; }

/*
 * The cover is a square drawn from the track's spectrum, so it is square here
 * too — a letterboxed crop of a radial burst reads as a smear. At full card
 * width it was an album sleeve that pushed the facts a whole screen down on a
 * phone, so it is a thumbnail beside the heading instead.
 */
.card-top { display: flex; align-items: center; gap: 0.75rem; }
.card-cover {
  display: block;
  flex: none;
  width: 4.5rem;
  height: 4.5rem;
  aspect-ratio: 1;
  border-radius: 0.5rem;
  background: var(--panel-2);
  object-fit: cover;
}

.card-head { flex: 1; min-width: 0; display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0.25rem 0.5rem; }
/*
 * The card heading is the interval shape ("45/15"), not a sentence. It is the
 * one thing that makes a column of cards line up, so it gets the size, the
 * tabular figures that stop 45/15 and 30/15 jittering as the grid reflows, and a
 * little negative tracking to sit the digits together.
 */
.card-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.chip {
  flex: none;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--card-accent, var(--accent));
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
}
/* One line of facts, separated by middots rather than labelled pairs: a card
   that had to explain "length: 12:10" was three times the height for no gain. */
.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.15rem 0.4rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}
.card-meta b { color: var(--ink); font-weight: 600; }
.meta-sep { opacity: 0.45; }

/* Visually hidden, still read: five cards share the heading "45/15". */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/*
 * Neutral until touched. The button used to take the card's accent colour, which
 * meant five genres rendered five differently-coloured buttons and the grid read
 * as a colour chart rather than as a list of choices — while the left border and
 * the genre chip already say what the colour means. The accent now arrives on
 * hover, focus and on the card that is playing, so colour marks the thing you are
 * about to press rather than everything at once.
 */
.card-play {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 999px;
  /* 0.6rem vertical puts the pill just over the 44px minimum touch target. */
  padding: 0.6rem 1rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}
.card:hover .card-play,
.card-play:focus-visible {
  background: var(--card-accent, var(--accent));
  border-color: var(--card-accent, var(--accent));
  color: #08121a;
}
.card.playing .card-play {
  background: var(--card-accent, var(--accent));
  border-color: var(--card-accent, var(--accent));
  color: #08121a;
}
.card-play:active { transform: translateY(1px); }

.empty { text-align: center; color: var(--muted); padding: 3rem 0; }

.foot { max-width: 72rem; margin: 0 auto; padding: 0 1rem 2rem; color: var(--muted); font-size: 0.78rem; }

.player {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 20;
  background: var(--panel);
  border-top: 1px solid var(--line);
  padding: 0.6rem 1rem calc(0.6rem + env(safe-area-inset-bottom));
  display: grid;
  gap: 0.5rem;
}
/*
 * The rule above outranks the user-agent sheet's `[hidden] { display: none }`
 * (same specificity, later in cascade order), so an unstarted player sat on
 * screen over the grid. State the hidden state explicitly instead.
 */
.player[hidden] { display: none; }
.phase { display: flex; align-items: baseline; gap: 0.6rem; }
.phase-kind {
  font-weight: 800;
  letter-spacing: 0.06em;
  font-size: 0.95rem;
  color: var(--rest);
}
.phase.work .phase-kind { color: var(--work); }
.phase-count { font-size: 1.5rem; font-variant-numeric: tabular-nums; font-weight: 700; }
.phase-round { margin-left: auto; color: var(--muted); font-size: 0.82rem; }

.transport { display: flex; align-items: center; gap: 0.4rem; }
.ctl {
  background: var(--panel-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  /* 2.75rem = 44px, the minimum comfortable touch target. */
  min-width: 2.75rem;
  min-height: 2.75rem;
  font: inherit;
  font-size: 1rem;
  cursor: pointer;
}
.ctl.play {
  min-width: 3.2rem;
  background: var(--accent);
  color: #08121a;
  font-weight: 800;
  border-color: transparent;
}
.ctl:disabled { opacity: 0.4; cursor: default; }

.scrub { display: flex; align-items: center; gap: 0.6rem; }
/* The native slider is only ~20px tall; height here widens the drag band. */
.seek { flex: 1; height: 2.75rem; accent-color: var(--accent); }
.times { display: flex; gap: 0.5rem; color: var(--muted); font-size: 0.75rem; font-variant-numeric: tabular-nums; }
.now { color: var(--muted); font-size: 0.78rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/*
 * A failed load used to be invisible: play() was rejected into an empty catch,
 * the player sat at 0:00 and the page looked broken. Say what went wrong — on a
 * phone there is no console to open.
 */
.player-error {
  margin: 0;
  color: #ff8fa3;
  font-size: 0.78rem;
}

@media (min-width: 720px) {
  .player {
    grid-template-columns: 14rem 1fr;
    grid-template-areas:
      "phase transport"
      "phase scrub"
      "now now"
      "error error";
    align-items: center;
    max-width: 72rem;
    margin: 0 auto;
    border-radius: 0.75rem 0.75rem 0 0;
  }
  .phase { grid-area: phase; flex-direction: column; align-items: flex-start; gap: 0; }
  .phase-round { margin-left: 0; }
  .transport { grid-area: transport; }
  .scrub { grid-area: scrub; }
  .now { grid-area: now; }
  .player-error { grid-area: error; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}