[hidden] { display: none !important; }

:root {
  color-scheme: dark;
  --ink: #f4ecdf;
  --muted: #cbbba6;
  --bg: #14110e;
  --panel: #221c17;
  --line: rgba(244, 236, 223, 0.14);
  --cream: #f6efe2;
  --cream-ink: #1c140f;
  --amber: #e39b3a;
  --teal: #7fd0c6;
  --bad: #ffb4a2;
  --good: #b7e3a8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(900px 420px at 0% -10%, rgba(227, 155, 58, 0.18), transparent 55%),
    radial-gradient(700px 420px at 100% 0%, rgba(60, 175, 163, 0.14), transparent 50%),
    var(--bg);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  line-height: 1.45;
}

button, input { font: inherit; color: inherit; }

button {
  background: #2c241c;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
}

button:hover { border-color: #f4ecdf; }

:focus-visible {
  outline: 2px solid #f2c14e;
  outline-offset: 3px;
}

kbd {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.75rem;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 5px;
  margin-left: 6px;
}

.brand {
  margin: 0;
  font-family: Georgia, "Iowan Old Style", serif;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
}

.tag, .kicker, .track-name, .empty, .drift-help, footer, #keys {
  color: var(--muted);
}

#gate {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(20, 17, 14, 0.94);
}

.gate-card {
  max-width: 440px;
  background: var(--cream);
  color: var(--cream-ink);
  padding: 32px;
  border-radius: 18px;
}

.gate-card h1 {
  font-family: Georgia, "Iowan Old Style", serif;
  font-weight: 500;
  font-size: 2.2rem;
  line-height: 1.05;
  margin: 8px 0 12px;
}

.gate-card .brand { color: var(--cream-ink); }

.gate-card button {
  background: var(--cream-ink);
  color: var(--cream);
  border: 0;
  margin-top: 8px;
  padding: 12px 18px;
}

.top {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 22px 20px 8px;
}

.top .tag { margin: 2px 0 0; }

.pips { display: flex; gap: 8px; margin-left: auto; }

.pips button {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}

.pips button.current {
  background: var(--cream);
  color: var(--cream-ink);
  border-color: var(--cream);
}

.pips button.locked { opacity: 0.4; }

#reset { background: transparent; }

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 8px 20px 32px;
}

.sheet {
  background: var(--cream);
  color: var(--cream-ink);
  border-radius: 18px;
  padding: 22px 24px 18px;
  margin: 12px 0 18px;
}

.sheet h1 {
  font-family: Georgia, "Iowan Old Style", serif;
  font-weight: 500;
  font-size: 2.4rem;
  line-height: 1;
  margin: 0 0 10px;
}

.kicker {
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
}

#lesson-body { margin: 0 0 8px; max-width: 68ch; }

#status { margin: 0; font-weight: 600; }

#continue {
  margin-top: 12px;
  background: var(--cream-ink);
  color: var(--cream);
  border: 0;
  padding: 10px 16px;
}

.tap-panel, #lamp-wrap { text-align: center; padding: 8px 0 18px; }

#lamp {
  width: 132px;
  height: 132px;
  margin: 0 auto 10px;
  border-radius: 50%;
  background: #2a211b;
  border: 3px solid #e7d7bd;
  box-shadow: inset 0 0 0 10px #1a1410;
}

#lamp.on {
  background: var(--amber);
  box-shadow: 0 0 36px rgba(227, 155, 58, 0.85);
}

#streak {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 1.3rem;
  margin: 0 0 10px;
}

#tap {
  font-size: 1.3rem;
  padding: 14px 28px;
  background: var(--amber);
  color: #1c140f;
  border: 0;
}

.decks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

body[data-lesson="1"] .decks,
body[data-lesson="2"] .decks { grid-template-columns: 1fr; }

.deck {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
}

.deck-a { border-top: 4px solid var(--amber); }
.deck-b { border-top: 4px solid var(--teal); }

.deck-head {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 4px 12px;
  align-items: baseline;
}

.deck h2 {
  margin: 0;
  font-size: 1.15rem;
  grid-column: 1 / -1;
}

.deck h2 span {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.85rem;
  margin-left: 6px;
}

.track-name { margin: 0; grid-column: 1; }

.bpm, .time, .tempo-read, #drift-readout, #cross-label {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

.bpm, .time { margin: 0; font-size: 1.05rem; }
.deck-a .bpm { color: #ffd7a1; }
.deck-b .bpm { color: var(--teal); }

.wave-wrap { position: relative; margin: 10px 0; }

canvas.wave, #drift-canvas {
  width: 100%;
  display: block;
  background: #100e0c;
  border-radius: 8px;
}

canvas.wave { height: 84px; }
#drift-canvas { height: 180px; }

.empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  pointer-events: none;
}

.transport, .nudge, .samples, .eq {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.samples button, .file {
  background: transparent;
  border-style: dashed;
}

.file {
  display: inline-flex;
  align-items: center;
  border: 1px dashed var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  position: relative;
}

.file input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.file:focus-within { outline: 2px solid #f2c14e; outline-offset: 3px; }

.tempo-block { margin-top: 12px; }

.tempo-block label, .eq label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--muted);
  flex: 1;
  min-width: 90px;
}

input[type="range"] { width: 100%; accent-color: #e7d3b0; }
.deck-a input[type="range"] { accent-color: var(--amber); }
.deck-b input[type="range"] { accent-color: #3cafa3; }

.eq span { font-family: ui-monospace, Menlo, Consolas, monospace; color: var(--ink); }

.cross-panel, .clash, .drift {
  margin-top: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
}

.cross-labels {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.85rem;
}

#cross { accent-color: var(--cream); margin: 8px 0; }
#cross-label { margin: 0; }

.clash { border-left: 6px solid var(--muted); }
.clash.bad { border-left-color: var(--bad); }
.clash.good { border-left-color: var(--good); }
.clash h2 { margin: 0 0 6px; font-size: 1.15rem; }
.clash p, #hold, .drift-help { margin: 0; }
#hold { margin-top: 8px; font-weight: 600; }

.drift h2 { margin: 0 0 6px; font-family: Georgia, "Iowan Old Style", serif; font-weight: 500; }
#drift-readout { margin: 8px 0; }
#sync {
  margin-top: 10px;
  background: var(--teal);
  color: #10221f;
  border: 0;
}

.error { color: var(--bad); min-height: 1.2em; }
.keys { font-size: 0.92rem; }

footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px 28px;
  font-size: 0.85rem;
}

#tip {
  position: fixed;
  z-index: 30;
  max-width: 260px;
  background: var(--cream);
  color: var(--cream-ink);
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  line-height: 1.35;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

@media (max-width: 800px) {
  .top { flex-wrap: wrap; }
  .pips { margin-left: 0; }
  .decks { grid-template-columns: 1fr; }
  .deck-head { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  #lamp.on { box-shadow: none; }
}