:root {
  color-scheme: light;
  --paper: #f3efe6;
  --ink: #1e1a16;
  --muted: #5e564c;
  --line: #e3d9c8;
  --card: #fffdf8;
  --accent: #0c6b58;
  --accent-soft: #e5f3ef;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, #fff 0, transparent 36%),
    var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", Helvetica, Arial, sans-serif;
}

.site-header, main, footer {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  padding: 32px 0 18px;
}

.eyebrow {
  margin: 0 0 4px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-family: Palatino, "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 500;
  letter-spacing: -0.03em;
}

.repo {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
}

main {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(240px, 0.8fr);
  gap: 18px;
  align-items: start;
}

.stage-card, .panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.stage-card { padding: 12px; }

#stage {
  width: 100%;
  height: auto;
  background: #ebe4d6;
  border-radius: 12px;
  display: block;
}

.status {
  min-height: 1.4em;
  margin: 10px 6px 4px;
  color: var(--muted);
  font-size: 14px;
}

.panel { padding: 18px; }

.upload input { display: none; }

.upload span, .samples button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--accent-soft);
  color: var(--ink);
  padding: 8px 14px;
  cursor: pointer;
  font: inherit;
}

.samples {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 18px;
}

.samples button[aria-pressed="true"] {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.threshold { display: block; margin-bottom: 8px; color: var(--muted); }

input[type="range"] { width: 100%; accent-color: var(--accent); }

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 18px 0;
}

.metrics div {
  background: #f7f3eb;
  border-radius: 12px;
  padding: 10px;
}

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

.metrics dd {
  margin: 4px 0 0;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.note, footer p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

footer { padding: 18px 0 40px; }

@media (max-width: 800px) {
  main { grid-template-columns: 1fr; }
  .site-header { align-items: start; flex-direction: column; }
  .metrics { grid-template-columns: 1fr; }
}