:root {
  --bg: #faf9f7;
  --panel: #ffffff;
  --ink: #2b2b2b;
  --accent: #b3424a;
  --ok: #3a7d44;
  --warn: #b3822a;
  --high: #b3424a;
  --line: #ddd8d0;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  margin: 0;
  padding: 0 1rem 3rem;
}

header { text-align: center; padding: 1.5rem 0 0.5rem; }
h1 { margin: 0; font-size: 1.8rem; }
.tagline { color: #777; margin: 0.25rem 0 0; }

main { max-width: 1100px; margin: 0 auto; }

section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-top: 1.25rem;
}

.cols { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.col.left { flex: 1 1 340px; }
.col.right { flex: 1.4 1 420px; }

button, select, input[type="file"] {
  font-size: 0.95rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

button { cursor: pointer; }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.finding {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  margin-bottom: 0.6rem;
}
.finding .sev {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  color: #fff;
}
.finding .sev.info { background: var(--ok); }
.finding .sev.warn { background: var(--warn); }
.finding .sev.high { background: var(--high); }
.finding h3 { margin: 0.3rem 0 0.2rem; font-size: 0.98rem; }
.finding p { margin: 0.2rem 0; font-size: 0.85rem; color: #555; }
.finding .caveat { font-style: italic; color: #8a7a4a; }
.finding label { font-size: 0.85rem; display: block; margin-top: 0.35rem; }
.finding .advisory { font-size: 0.8rem; color: #888; font-style: italic; }

/* --- new: settings, legend, verify, highlight ---------------------------- */

.hint { font-size: 0.8rem; color: #777; margin: 0.25rem 0 0.5rem; }

.finding.locating {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(179, 66, 74, 0.25);
}
.finding .locate-btn { font-size: 0.75rem; padding: 0.2rem 0.5rem; margin-right: 0.4rem; }
.finding .explain-btn { font-size: 0.75rem; padding: 0.2rem 0.5rem; }
.finding .finding-error { color: var(--high); font-size: 0.78rem; min-height: 1em; margin-top: 0.25rem; }
.finding .finding-error:empty { margin: 0; }

details.settings, details.verify {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  background: #fcfbf9;
}
details.settings summary, details.verify summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
}

.setting-row {
  display: grid;
  grid-template-columns: 1fr 110px 55px;
  align-items: center;
  gap: 0.6rem;
  margin: 0.45rem 0;
  font-size: 0.82rem;
}
.setting-row input[type="range"] { width: 110px; }
.settings-actions {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin-top: 0.6rem;
  font-size: 0.82rem;
}
.settings-actions .inline { display: flex; gap: 0.3rem; align-items: center; }

.legend {
  font-size: 0.75rem;
  color: #666;
  margin-top: 0.35rem;
  text-align: center;
}

#refresh-preview { font-size: 0.8rem; padding: 0.2rem 0.6rem; margin-left: auto; }

.verify-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-top: 0.5rem;
}
.verify-table th, .verify-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.3rem 0.45rem;
  text-align: left;
}
.verify-table .warn { color: var(--warn); font-weight: 600; }
.verify-table .warnrow td { background: #fdf6ec; }
.ok { color: var(--ok); font-size: 0.85rem; font-weight: 600; }

canvas {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  width: 100%;
  height: auto;
}

.view-toggle { display: flex; gap: 1rem; margin-bottom: 0.5rem; font-size: 0.85rem; }
.view-toggle label { cursor: pointer; }

#stats { font-size: 0.85rem; color: #555; margin-top: 0.5rem; white-space: pre-wrap; }

.export-row, .history-row { display: flex; gap: 0.5rem; margin-top: 0.5rem; }

.error { color: var(--high); font-size: 0.9rem; min-height: 1.2em; }

#explain-box {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--accent);
  background: #fdf6f6;
  border-radius: 0 8px 8px 0;
}
#explain-box h3 { margin: 0 0 0.3rem; font-size: 0.9rem; }
#explain-box p { margin: 0; font-size: 0.88rem; }