:root {
  color-scheme: dark;
  --bg: #101314;
  --panel: #181d1f;
  --panel-2: #20272a;
  --line: #314044;
  --text: #edf3f1;
  --muted: #9fb0ac;
  --accent: #46d6a7;
  --accent-2: #f2b84b;
  --warn: #fb6b6b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Segoe UI, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  overflow-x: hidden;
}

.app {
  min-height: 100vh;
  padding: 18px;
  max-width: 100vw;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(0, 1.8fr);
  gap: 18px;
  align-items: start;
  margin-bottom: 16px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 26px;
  line-height: 1.1;
}

p,
span,
output,
label {
  color: var(--muted);
}

.credit {
  margin-top: 4px;
  color: var(--accent);
  font-weight: 700;
}

.control-panel {
  display: grid;
  gap: 10px;
  padding-top: 64px;
  min-width: 0;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(82px, 1fr));
  gap: 8px;
  align-items: end;
  min-width: 0;
}

.key-order-controls {
  display: grid;
  grid-column: span 4;
  grid-template-columns: minmax(62px, 0.5fr) minmax(100px, 0.9fr) minmax(150px, 1.3fr);
  gap: 8px;
  align-items: end;
  min-width: 0;
}

.data-mode-control {
  min-width: 0;
}

.run-controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding-top: 2px;
}

.run-controls button {
  min-width: 108px;
}

.legend-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 14px;
  overflow: hidden;
}

.legend-header {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
}

.route-key {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
  padding: 10px 12px;
}

.route-key span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
}

.key-dot {
  width: 12px;
  height: 12px;
  border: 1px solid rgba(237, 243, 241, 0.5);
  display: inline-block;
}

.key-done {
  background: #d6dae2;
}

.key-msd {
  background: #f0e442;
}

.key-lsd {
  background: #0072b2;
}

.key-lsd-tail {
  background: #56b4e9;
}

.key-tuple {
  background: #cc79a7;
}

.key-tiny-insertion {
  background: #ffb000;
}

.key-tiny-binary {
  background: #fe6100;
}

.key-tiny-quick {
  background: #648fff;
}

.key-tiny-threeway {
  background: #dc267f;
}

.key-tiny-msd {
  background: #00c2a8;
}

.key-global-reverse {
  background: linear-gradient(135deg, #785ef0 0 50%, #d6dae2 50% 100%);
}

.key-bucket-reverse {
  background: linear-gradient(135deg, #785ef0 0 50%, #f0e442 50% 100%);
}

.key-reverse {
  background: #785ef0;
}

label {
  display: grid;
  gap: 5px;
  font-size: 12px;
}

.check-control input {
  width: 34px;
  justify-self: start;
  accent-color: var(--accent);
}

input,
select,
button {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
}

input,
select {
  width: 100%;
  padding: 4px 8px;
}

input:disabled,
select:disabled {
  opacity: 0.45;
}

button {
  cursor: pointer;
  font-weight: 650;
}

button:hover {
  border-color: var(--accent);
}

.is-hidden {
  display: none !important;
}

.stage {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 14px;
  overflow: hidden;
  min-width: 0;
}

.lane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.lane-header span,
.lane-header output {
  color: var(--text);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.35;
  text-align: right;
  max-width: min(58vw, 760px);
}

h2 {
  font-size: 15px;
  font-weight: 700;
}

canvas {
  display: block;
  width: 100%;
  max-width: 100%;
  background: #111617;
}

.source-canvas {
  height: 180px;
}

.bucket-canvas {
  height: 430px;
}

.lsd-canvas {
  height: 640px;
}

.tiny-canvas,
.reverse-canvas,
.tuples-canvas {
  height: 520px;
}

@media (max-width: 980px) {
  .topbar {
    grid-template-columns: 1fr;
  }

  .control-panel {
    padding-top: 0;
  }

  .controls {
    grid-template-columns: repeat(3, minmax(88px, 1fr));
  }

  .key-order-controls {
    grid-column: 1 / -1;
  }

  .run-controls {
    justify-content: stretch;
  }

  .run-controls button {
    flex: 1;
    min-width: 0;
  }

  .bucket-canvas {
    height: 520px;
  }

  .lsd-canvas {
    height: 760px;
  }

  .tiny-canvas,
  .reverse-canvas,
  .tuples-canvas {
    height: 640px;
  }
}