:root {
  --bg: #0f1115;
  --panel: #161a21;
  --panel-alt: #1d222b;
  --border: #2a2f3a;
  --text: #e6e9ef;
  --text-dim: #8b93a3;
  --accent: #5eead4;
  --accent-dim: #2b6f63;
  --danger: #f87171;
  --font: -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", "Consolas", "Cascadia Code", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
}

.topbar {
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
}
.topbar-title { display: flex; align-items: baseline; gap: 10px; }
.logo-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.topbar h1 { margin: 0; font-size: 18px; letter-spacing: 0.02em; }
.tagline { color: var(--text-dim); font-size: 12.5px; }

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  padding: 20px 24px 60px;
  align-items: start;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

.config-panel { position: sticky; top: 20px; }
.config-panel h2 { margin: 0 0 16px; font-size: 15px; }

@media (max-width: 860px) {
  /* sticky only makes sense with a separate scrolling column beside it --
     collapsed to one column (see .layout above), a stuck sidebar overlaps
     the results below it as the page scrolls (and silently eats clicks
     meant for what's underneath it). Placed after the base rule on
     purpose: same specificity, so source order is what makes this win. */
  .config-panel { position: static; }
}

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 12.5px; color: var(--text-dim); margin-bottom: 6px; }
.field .hint { color: #5d6472; }
.sub-label { font-size: 11px !important; margin-bottom: 2px !important; }

.field-row { display: flex; align-items: center; gap: 10px; }
.field-row.two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.field-row output {
  font-family: var(--mono);
  font-size: 12.5px;
  min-width: 40px;
  text-align: right;
  color: var(--accent);
}
input[type="number"] {
  width: 100%;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 7px 10px;
  font-family: var(--mono);
}

.field.hidden { display: none !important; }
.field .hint.small { display: block; font-size: 11px; margin-top: 8px; line-height: 1.5; }
.field .hint.small code {
  background: var(--panel-alt); border: 1px solid var(--border); border-radius: 3px;
  padding: 1px 4px; font-family: var(--mono); font-size: 10.5px; color: var(--text);
}

.data-source-toggle { display: flex; gap: 8px; }
.radio-pill {
  flex: 1; text-align: center; padding: 7px 8px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--panel-alt);
  font-size: 12.5px; cursor: pointer; user-select: none;
}
.radio-pill input { position: absolute; opacity: 0; pointer-events: none; }
.radio-pill:has(input:checked) { border-color: var(--accent); color: var(--accent); background: rgba(94,234,212,0.08); }

input[type="file"] {
  width: 100%; font-size: 12px; color: var(--text-dim);
  background: var(--panel-alt); border: 1px dashed var(--border); border-radius: 6px; padding: 8px;
}
.csv-info { font-size: 11.5px; margin-top: 6px; min-height: 14px; }
.csv-info.ok { color: var(--accent); }
.csv-info.error { color: var(--danger); white-space: pre-line; }

.link-btn {
  display: inline-block; margin-top: 8px; font-size: 12px; color: var(--accent);
  text-decoration: none; border-bottom: 1px dotted var(--accent-dim);
}
.link-btn:hover { border-bottom-style: solid; }

.btn-secondary.wide { margin-top: 4px; }

.btn-primary, .btn-secondary {
  width: 100%;
  padding: 11px;
  border-radius: 7px;
  border: none;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 6px;
}
.btn-primary { background: var(--accent); color: #05221d; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:disabled { opacity: 0.5; cursor: default; }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-secondary:disabled { opacity: 0.4; cursor: default; }
.btn-secondary:not(:disabled):hover { border-color: var(--accent); color: var(--accent); }

.status { min-height: 18px; font-size: 12px; margin-top: 8px; color: var(--text-dim); }
.status.error { color: var(--danger); white-space: pre-line; }
.status.ok { color: var(--accent); }

.results-panel { min-height: 300px; }
.empty-state { color: var(--text-dim); line-height: 1.6; max-width: 60ch; }

.results.hidden, .hidden { display: none !important; }

.results h2 { margin-top: 0; font-size: 15px; }
.results h3 { font-size: 13px; color: var(--text-dim); margin: 26px 0 10px; text-transform: uppercase; letter-spacing: 0.04em; }
.results h4 { font-size: 12.5px; color: var(--text); margin: 14px 0 6px; }

.data-source-note {
  font-size: 12px; color: #fbbf24; background: rgba(251,191,36,0.08);
  border: 1px solid rgba(251,191,36,0.3); border-radius: 7px; padding: 10px 12px; margin-bottom: 14px;
}

.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.stat-card {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
}
.stat-card .value { font-family: var(--mono); font-size: 20px; color: var(--accent); }
.stat-card .label { font-size: 11px; color: var(--text-dim); margin-top: 2px; }
.stat-card.warn .value { color: #fbbf24; }

.chart-wrap {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
}
.chart-wrap svg { width: 100%; height: auto; display: block; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 10px; }
@media (max-width: 700px) { .two-col { grid-template-columns: 1fr; } }

.confusion-wrap table { border-collapse: collapse; width: 100%; font-size: 11px; }
.confusion-wrap th, .confusion-wrap td { padding: 6px; text-align: center; border: 1px solid var(--border); }
.confusion-wrap th { color: var(--text-dim); font-weight: 500; }
.confusion-wrap td.diag { font-weight: 700; }

.per-class-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.per-class-table th, .per-class-table td { padding: 7px 8px; text-align: left; border-bottom: 1px solid var(--border); }
.per-class-table th { color: var(--text-dim); font-weight: 500; }
.per-class-table td:not(:first-child) { font-family: var(--mono); text-align: right; }

.feature-group { margin-bottom: 16px; }

.legend { display: flex; flex-wrap: wrap; gap: 10px 16px; margin-top: 12px; font-size: 11.5px; color: var(--text-dim); }
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-swatch { width: 10px; height: 10px; border-radius: 2px; }

.c-tests { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.c-test {
  background: var(--panel-alt); border: 1px solid var(--border); border-radius: 8px; overflow: hidden;
}
.c-test-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; cursor: pointer;
}
.c-test-name { font-size: 12.5px; }
.c-test-badge {
  font-family: var(--mono); font-size: 11px; padding: 2px 8px; border-radius: 10px;
  text-transform: uppercase; letter-spacing: 0.03em;
}
.c-test-badge.pass { background: rgba(94,234,212,0.15); color: var(--accent); }
.c-test-badge.fail, .c-test-badge.build_failed, .c-test-badge.error { background: rgba(248,113,113,0.15); color: var(--danger); }
.c-test-badge.skipped { background: rgba(251,191,36,0.15); color: #fbbf24; }
.c-test-output {
  font-family: var(--mono); font-size: 11px; white-space: pre-wrap; word-break: break-word;
  padding: 0 14px 12px; color: var(--text-dim); max-height: 240px; overflow-y: auto;
}

/* Public demo additions; production layout and component styles retained. */
.demo-nav{display:flex;gap:20px;margin-left:auto;flex-wrap:wrap}.demo-nav a{color:var(--accent);text-decoration:none}.topbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.topbar-title{flex-wrap:wrap}.demo-banner{margin:16px 24px 0;padding:12px 16px;border:1px solid #7c6330;border-radius:7px;background:#292519;color:#f5d58b;line-height:1.6}.layout>*{min-width:0}.two-col>*{min-width:0}.confusion-wrap{overflow-x:auto}.field-row input[type=range]{min-width:0;width:100%}.chart-wrap{overflow:hidden}.radio-pill:focus-within{outline:2px solid var(--accent)}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.topbar a{font-size:14px}.config-panel .hint{color:#9aa4b5}.tagline{font-size:14px}.csv-info{overflow-wrap:anywhere}summary{list-style:none}summary::-webkit-details-marker{display:none}.per-class-table{display:block;overflow-x:auto}.field .hint.small{font-size:12px} .empty-state{font-size:16px}
@media(max-width:500px){.layout{padding:16px 12px;gap:14px}.topbar{padding:16px}.demo-banner{margin:12px}.panel{padding:14px}.two-col{grid-template-columns:1fr}}