:root {
  --bg: #0d1117;
  --panel: #161c26;
  --panel-edge: #232c38;
  --ink: #dfe8ef;
  --ink-dim: #7d8a99;
  --accent: #7fe3a0;
  --accent2: #ffb454;
  --blue: #7fb7ff;
  --oled: #06090d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  padding-bottom: 30px;
}

/* ---------- shared transport bar ---------- */
.transport-bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  background: linear-gradient(180deg, #1a2029, #141922);
  border-bottom: 1px solid var(--panel-edge);
  padding: 10px 26px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}
.transport-bar .big-btn {
  background: #222a35;
  color: var(--ink);
  border: 1px solid #313c4b;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}
.transport-bar .big-btn .hint { font-size: 9px; color: var(--ink-dim); font-weight: 400; letter-spacing: 0; }
.transport-bar .big-btn.on { background: var(--accent); color: #10241a; border-color: #9ff5c0; }
.transport-bar .big-btn.tap { font-weight: 400; }
.bpm-wrap, .slot-sel-wrap, .dest-wrap, .midi-wrap { display: flex; align-items: center; gap: 7px; }
.bpm-wrap label, .mon-label { font-size: 11px; color: var(--ink-dim); letter-spacing: 0.08em; }
.bpm-wrap input {
  width: 64px;
  background: #10141b;
  color: var(--ink);
  border: 1px solid #2c3542;
  border-radius: 6px;
  padding: 7px 8px;
  font: inherit;
}
select {
  background: #10141b;
  color: var(--ink);
  border: 1px solid #2c3542;
  border-radius: 6px;
  padding: 7px 8px;
  font: inherit;
  font-size: 12.5px;
}
.midi-wrap { margin-left: auto; }
.midi-wrap select { max-width: 210px; }
.small-btn {
  background: #222a35;
  color: var(--ink);
  border: 1px solid #313c4b;
  border-radius: 6px;
  padding: 7px 10px;
  font: inherit;
  font-size: 11.5px;
  cursor: pointer;
  white-space: nowrap;
}
.small-btn:hover { border-color: var(--accent); }
.tip.inline { font-size: 11px; color: var(--ink-dim); }

/* ---------- main ---------- */
main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 26px 0;
}

/* ---------- OLED row ---------- */
#oledRow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.oled-cell {
  background: linear-gradient(180deg, #20242e, #191d25);
  border: 1px solid var(--panel-edge);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  padding: 10px 12px 12px;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.oled-cell:hover { border-color: #35465c; }
.oled-cell.selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 10px 30px rgba(0, 0, 0, 0.35); }
.oled-cell.empty { opacity: 0.5; }
.cell-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  min-height: 18px;
}
.cell-name {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.oled-cell.selected .cell-name { color: var(--accent); }
.cell-leds { display: flex; gap: 5px; margin-left: auto; }
.dot-led {
  width: 9px; height: 9px; border-radius: 50%;
  background: #20242c;
  border: 1px solid #333a46;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.6);
}
.dot-led.on { background: var(--accent); border-color: #9ff5c0; box-shadow: 0 0 8px rgba(127, 227, 160, 0.7); }
.dot-led.amber.on { background: var(--accent2); border-color: #ffd9a0; box-shadow: 0 0 8px rgba(255, 180, 84, 0.7); }
.dot-led.blue.on { background: var(--blue); border-color: #b3d4ff; box-shadow: 0 0 8px rgba(127, 183, 255, 0.7); }
.dot-led.purple.on { background: #c9a6ff; border-color: #e0ccff; box-shadow: 0 0 8px rgba(201, 166, 255, 0.7); }
.oled-cell canvas.cell-oled {
  width: 60%;
  margin: 0 auto;
  display: block;
  background: var(--oled);
  border: 1px solid #0c1219;
  border-radius: 6px;
  box-shadow: 0 0 14px rgba(140, 220, 255, 0.12);
  image-rendering: pixelated;
}
.oled-cell canvas.cell-strip {
  width: 100%;
  display: block;
  margin-top: 8px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 4px;
}

/* ---------- controls area ---------- */
#controls { margin-top: 16px; }
.slot-controls { display: none; }
.slot-controls.selected { display: block; }
.controls-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.controls-head .mon-label { font-size: 11px; }
.controls-head .switch {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; cursor: pointer;
}
.group {
  background: linear-gradient(180deg, #20242e, #191d25);
  border: 1px solid var(--panel-edge);
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0 0 10px 0;
}
.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px;
}
.group h2 {
  margin: 0 0 9px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}
.row { display: flex; align-items: center; gap: 8px; padding: 3px 0; }
.row label { font-size: 12px; color: var(--ink-dim); white-space: nowrap; }
.row .val { color: var(--ink); font-variant-numeric: tabular-nums; }
.row .grow { flex: 1; }
input[type="range"] { flex: 1; min-width: 0; accent-color: var(--accent); }
input[type="number"], input.hex {
  background: #10141b;
  color: var(--ink);
  border: 1px solid #2c3542;
  border-radius: 6px;
  padding: 6px 8px;
  font: inherit;
  font-size: 12.5px;
}
input.hex { width: 5.2em; text-transform: uppercase; font-family: ui-monospace, monospace; }
.tip { color: var(--ink-dim); font-size: 11px; margin: 7px 0 0; }
.tip.inline { font-size: 11px; color: var(--ink-dim); }
.dimmed { opacity: 0.38; transition: opacity 0.2s; }

/* global output destination: show the matching per-slot group */
body[data-dest="audio"] .midi-only { display: none; }
body[data-dest="midi"] .audio-only { display: none; }

footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 26px;
  color: var(--ink-dim);
  font-size: 12px;
}
footer a { color: var(--ink); }

@media (max-width: 720px) {
  #oledRow { grid-template-columns: 1fr; }
  .transport-bar { padding: 10px 14px; }
  main { padding: 10px 14px 0; }
}