:root {
  --bg: #14161c;
  --panel: #1d2129;
  --panel-edge: #2b3140;
  --ink: #d7dfe8;
  --ink-dim: #8b96a5;
  --accent: #7fe3a0;
  --accent2: #ffb454;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 20% -10%, rgba(126, 183, 255, 0.07), transparent),
    var(--bg);
  color: var(--ink);
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}

a { color: #8fc7ff; text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 18px 26px 10px;
  max-width: 1280px;
  margin: 0 auto;
}

.logo-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: #0a0d12;
  border: 1px solid var(--panel-edge);
  border-radius: 8px;
  color: var(--accent);
  font-size: 20px;
}

.title { flex: 1; }
.title h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.06em;
}
.title h1 .sub { color: var(--ink-dim); font-weight: 400; }
.title p { margin: 2px 0 0; color: var(--ink-dim); font-size: 12.5px; max-width: 720px; }

.back {
  font-size: 12.5px;
  color: var(--ink-dim);
  white-space: nowrap;
}
.back:hover { color: var(--ink); }

main {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 18px;
  padding: 12px 26px 26px;
  max-width: 1280px;
  margin: 0 auto;
}
@media (max-width: 960px) {
  main { grid-template-columns: 1fr; }
}

.panel {
  background: linear-gradient(180deg, #20242e, #191d25);
  border: 1px solid var(--panel-edge);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.roll-wrap {
  height: min(58vh, 520px);
  min-height: 280px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #0a0d12;
  background: #0c1016;
  margin-top: 10px;
}
#roll {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}

.roll-caption {
  color: var(--ink-dim);
  font-size: 11px;
  margin-top: 8px;
  line-height: 1.45;
}

/* transport */
.transport {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

button {
  font: inherit;
  color: var(--ink);
  background: #262c38;
  border: 1px solid var(--panel-edge);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, transform 0.05s;
}
button:hover { background: #2e3545; }
button:active { transform: translateY(1px); }
button.on { background: #274a35; border-color: #3f7c56; color: #c9f2d8; }

.big-btn {
  min-width: 72px;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.big-btn.tap { min-width: 64px; font-size: 12px; }
.big-btn.gen {
  flex: 1;
  background: #274a35;
  border-color: #3f7c56;
  color: #c9f2d8;
}
.big-btn.gen:hover { background: #2f5a40; }
#runBtn.on { background: #2c5138; box-shadow: 0 0 12px rgba(127, 227, 160, 0.25); }

.bpm-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #12151b;
  border: 1px solid var(--panel-edge);
  border-radius: 8px;
  padding: 6px 10px;
}
.bpm-wrap label { font-size: 11px; color: var(--ink-dim); }
.bpm-wrap input, .bpm-wrap select {
  width: 64px;
  background: transparent;
  border: 0;
  color: var(--ink);
  font: inherit;
}
.bpm-wrap select { width: auto; }

.mon-item { font-size: 12px; color: var(--ink-dim); }
.mon-label { letter-spacing: 0.04em; }

.led-wrap { display: flex; align-items: center; gap: 6px; }
.led {
  width: 10px; height: 10px; border-radius: 50%;
  background: #2a3140; box-shadow: inset 0 0 2px #000;
}
.led.purple { background: #3a2a4a; }
.led.on { background: #c084fc; box-shadow: 0 0 8px rgba(192, 132, 252, 0.7); }
.led-label { font-size: 10px; color: var(--ink-dim); letter-spacing: 0.06em; }

/* side panel */
.group { margin-bottom: 18px; }
.group h2 {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.row label { font-size: 12.5px; color: var(--ink-dim); }
.row label.grow { flex: 1; min-width: 100px; }
.row .val { color: var(--ink); font-variant-numeric: tabular-nums; }

.row select, .row input[type="text"], .row input[type="number"], .seed-input, .num {
  background: #12151b;
  border: 1px solid var(--panel-edge);
  border-radius: 6px;
  color: var(--ink);
  font: inherit;
  padding: 6px 8px;
}
.row select { min-width: 110px; flex: 1; }
.seed-input { flex: 1; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; min-width: 90px; }
.num { width: 56px; }

input[type="range"] {
  flex: 1;
  min-width: 100px;
  accent-color: var(--accent);
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--ink-dim);
  cursor: pointer;
  user-select: none;
}
.switch input { accent-color: var(--accent); }
.switches { gap: 14px; }

.tip {
  margin: 6px 0 0;
  font-size: 11.5px;
  color: var(--ink-dim);
  line-height: 1.45;
}

.dimmed { opacity: 0.45; pointer-events: none; }
#midiGroup:not(.dimmed), #audioGroup:not(.dimmed) { opacity: 1; pointer-events: auto; }

footer {
  max-width: 1280px;
  margin: 0 auto 32px;
  padding: 0 26px;
  color: var(--ink-dim);
  font-size: 12px;
}