:root {
  --bg: #f4f3ef;
  --surface: #ffffff;
  --text: #1c1c1a;
  --muted: #6b6a64;
  --line: #dddbd3;
  --accent: #d2481f;
  --accent-text: #ffffff;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121211;
    --surface: #1d1d1b;
    --text: #ecebe6;
    --muted: #9b9a93;
    --line: #34332f;
    --accent: #ff6a3d;
    --accent-text: #121211;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, sans-serif;
}

.mixer {
  display: grid;
  grid-template-areas:
    "header"
    "decks"
    "crossfader";
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

.header { grid-area: header; }
.header h1 { margin: 0; font-size: 28px; letter-spacing: -0.01em; }
.header p { margin: 4px 0 0; color: var(--muted); }

.decks {
  grid-area: decks;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.deck {
  display: grid;
  gap: 14px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.deck-head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
}
.deck-name { margin: 0; font-size: 18px; }

.bar-beat { display: grid; grid-template-columns: repeat(4, 10px); gap: 6px; }
.bar-beat i { height: 10px; border-radius: 50%; background: var(--line); }
.bar-beat i.on { background: var(--accent); }

.file { display: grid; cursor: pointer; }
.file input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.file-label {
  padding: 10px 12px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file input:focus-visible + .file-label { outline: 2px solid var(--accent); }

.readout {
  display: grid;
  grid-template-columns: 1fr auto;
  margin: 0;
  font-variant-numeric: tabular-nums;
}
.readout [data-readout="bpm"] { font-size: 22px; font-weight: 600; }
.readout [data-readout="time"] { align-self: end; color: var(--muted); }

.buttons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }

button {
  padding: 10px 8px;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}
button:disabled { opacity: 0.4; cursor: default; }
button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }

.control {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px;
  color: var(--muted);
  font-size: 13px;
}
.control input { grid-column: 1 / -1; }
.control output { font-variant-numeric: tabular-nums; }

input[type="range"] { width: 100%; accent-color: var(--accent); }

.crossfader {
  grid-area: crossfader;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
}