:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1f242c;
  --border: #2a2f37;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #f7931e;
  --accent-2: #2ea043;
  --danger: #d9534f;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 12px;
}

header h1 {
  font-size: 18px;
  margin: 0;
}

.subtitle {
  color: var(--muted);
  font-size: 13px;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.card h2 {
  font-size: 14px;
  margin: 0 0 12px 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.card h3 {
  font-size: 13px;
  margin: 0 0 6px 0;
  color: var(--muted);
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}

label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  color: var(--muted);
  gap: 4px;
  flex: 1 1 140px;
}

label.wide { flex-basis: 100%; }

input {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 13px;
  font-family: inherit;
}

input:focus {
  outline: none;
  border-color: var(--accent);
}

button {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
}

button:hover { background: #262c36; }

button.primary { background: var(--accent); color: #1a1207; border-color: var(--accent); font-weight: 600; }
button.primary:hover { background: #ffae47; }
button.danger { color: var(--danger); }

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.status {
  color: var(--muted);
  font-size: 13px;
  margin-top: 8px;
}

.result-block {
  flex: 1 1 320px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
}

.big {
  font-size: 28px;
  font-weight: 600;
  color: var(--accent);
  margin: 4px 0;
}

.big.small { font-size: 18px; }

.row.baseline > div {
  flex: 1 1 100px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
}

.meta {
  font-size: 12px;
  color: var(--muted);
}

.meta a {
  color: #58a6ff;
  text-decoration: none;
}
.meta a:hover { text-decoration: underline; }

.notes {
  margin-top: 12px;
  font-size: 12px;
  color: var(--muted);
}

pre {
  white-space: pre-wrap;
  word-break: break-all;
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 10px;
  border-radius: 4px;
  font-size: 12px;
  max-height: 240px;
  overflow: auto;
}

/* ---- replay picker (top-of-page action row) ---- */
.replay-picker {
  flex: 1 1 240px;
  font-size: 12px;
  color: var(--muted);
}
.replay-picker select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 13px;
}

/* ---- provenance badges ----
   Small tags next to card/panel headlines marking where an algorithm
   comes from: ported from markniu/bd_pressure, ported from Snapmaker U1,
   or original to this project. h2 is uppercase-transformed, so reset it. */
.src-badge {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: none;
  vertical-align: middle;
  white-space: nowrap;
}
.src-bd  { background: rgba(163, 113, 247, 0.12); color: #a371f7; border: 1px solid #6e40a5; }
.src-u1  { background: rgba(88, 166, 255, 0.12);  color: #58a6ff; border: 1px solid #1f6feb; }
.src-own { background: rgba(46, 160, 67, 0.12);   color: #3fb950; border: 1px solid #2ea043; }

/* ---- segment browser (bd-* classes: step-response viewer, layout shared
        by the Max Flow / Touch Probe per-step viewers) ---- */
.bd-browser {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 12px;
  min-height: 500px;
}
.bd-k-list {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow-y: auto;
  max-height: 600px;
}
.bd-k-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  font-size: 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.bd-k-row:hover { background: #262c36; }
.bd-k-row.active { background: rgba(247, 147, 30, 0.15); border-left: 3px solid var(--accent); }
.bd-k-row .k { color: var(--text); font-family: monospace; }
.bd-k-row .segs { color: var(--muted); font-size: 11px; }
.bd-k-row .segs.green { color: var(--accent-2); }
.bd-k-row .segs.yellow { color: #d29922; }
.bd-k-row .segs.red { color: var(--danger); }
.bd-k-row.k-opt { box-shadow: inset 0 0 0 1px var(--accent-2); }

.bd-segment-pane {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
}
.bd-segment-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 8px;
}
.bd-segment-nav {
  display: flex;
  align-items: center;
  gap: 12px;
}
.bd-segment-nav button {
  padding: 4px 12px;
  font-size: 14px;
}
.bd-segment-nav span {
  flex: 1;
  text-align: center;
  font-family: monospace;
  font-size: 13px;
}
.bd-overlay-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 11px;
  color: var(--muted);
}
.bd-overlay-toggles label {
  flex: 0 0 auto;
  flex-direction: row;
  align-items: center;
  gap: 4px;
}
.bd-overlay-toggles input { margin: 0; }
.bd-excluded {
  background: rgba(217, 83, 79, 0.15);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 12px;
}
.bd-stats {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
}
.bd-region {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--muted);
  border-radius: 4px;
  padding: 6px 8px;
  font-size: 11px;
}
.bd-region .name {
  color: var(--text);
  font-weight: 600;
  margin-bottom: 4px;
}
.bd-region .metric {
  color: var(--muted);
  display: flex;
  justify-content: space-between;
}
.bd-region .metric .value { color: var(--text); font-family: monospace; }

/* ---- weight sliders + metric grid ---- */
.bd-weight-sliders {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  margin: 10px 0;
}
.bd-weight-sliders label {
  flex-direction: column;
  font-size: 11px;
  color: var(--muted);
}
.bd-weight-sliders input[type=range] {
  width: 100%;
  margin: 4px 0;
  padding: 0;
}
.bd-weight-sliders .slider-row {
  display: flex;
  justify-content: space-between;
  font-family: monospace;
  font-size: 11px;
}
.bd-weight-sliders .slider-row .name { color: var(--text); }
.bd-weight-sliders .slider-row .value { color: var(--accent); }
.bd-metric-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}
.bd-metric-table th,
.bd-metric-table td {
  padding: 4px 6px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.bd-metric-table th { color: var(--muted); font-weight: 400; }
.bd-metric-table td.kopt { font-family: monospace; color: var(--accent); text-align: right; }
.bd-metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 10px;
  margin-top: 14px;
}
.bd-metric-cell {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px;
}
.bd-metric-cell .label {
  font-size: 11px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
}
.bd-metric-cell .label .kopt { color: var(--accent); font-family: monospace; }