:root {
  --canvas: #f5f1ec;
  --surface: #ffffff;
  --surface-2: #ebe7e1;
  --ink: #111111;
  --ink-muted: #626260;
  --ink-subtle: #7b7b78;
  --hairline: #d8d1c8;
  --hairline-soft: #ebe7e1;
  --orange: #ff5600;
  --footer-bg: #eee8de;
  --critical: #d23b1f;
  --warning: #b26a00;
  --info: #6b7280;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--ink); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.wrap, .main, .panel, .nav, .foot-inner { max-width: 820px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }

/* ── nav ── */
.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 20px;
  padding-bottom: 20px;
}
.brand {
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  font-size: 17px;
}
.brand:hover { text-decoration: none; }
.nav-link { color: var(--ink-muted); font-weight: 500; margin-left: auto; font-size: 15px; }
.nav-link:hover { color: var(--ink); }

/* ── content ── */
.main { padding-top: 8px; padding-bottom: 48px; }
.main h1 {
  font-size: clamp(30px, 4.6vw, 46px);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 12px 0 18px;
  text-wrap: balance;
}
.main h2 {
  font-size: 24px; font-weight: 500; letter-spacing: -0.017em;
  margin: 40px 0 12px;
}
.main h3 { font-size: 19px; font-weight: 500; margin: 26px 0 8px; }
.main h4 { font-size: 16px; font-weight: 600; margin: 20px 0 6px; }
.main p { color: #2c2c2b; margin: 0 0 16px; }
.lede { font-size: 19px; line-height: 1.45; letter-spacing: -0.006em; color: var(--ink); }
.main a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--hairline); text-underline-offset: 3px; }
.main a:hover { text-decoration-color: var(--ink); }
.main img {
  max-width: 100%; border-radius: 10px; border: 1px solid var(--hairline);
  display: block; margin: 20px 0; background: var(--surface);
}
.main code {
  font-family: var(--mono); font-size: 13.5px;
  background: var(--surface-2); padding: 2px 6px; border-radius: 5px;
}
.main ul, .main ol { color: #2c2c2b; padding-left: 20px; }
.main li { margin: 4px 0; }
.next { margin-top: 8px; }
.next a { font-weight: 500; }

/* ── test panel ── */
.panel {
  margin-top: 8px;
  margin-bottom: 32px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 18px 20px;
}
.panel-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.panel-kicker {
  text-transform: uppercase; letter-spacing: 0.08em; font-size: 11px;
  font-weight: 600; color: var(--ink-subtle);
}
.panel-cat {
  margin-left: auto; font-size: 12px; color: var(--ink-subtle);
  font-family: var(--mono);
}
.panel-summary { margin: 10px 0 0; font-size: 15px; color: var(--ink); }
.panel-lesson { margin: 6px 0 0; font-size: 14px; color: var(--ink-muted); }
.panel-chips { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.chips-label { font-size: 12px; color: var(--ink-subtle); font-weight: 500; margin-right: 2px; }

.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 500; color: var(--ink);
  padding: 3px 11px 3px 9px; border-radius: 999px;
  background: var(--canvas); border: 1px solid var(--hairline);
}
.chip::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; flex: none;
  background: var(--info);
}
.chip-critical::before { background: var(--critical); }
.chip-warning::before { background: var(--warning); }
.chip-info::before { background: var(--info); }
.chip-clean { color: var(--ink-muted); }
.chip-clean::before { background: #3a9d5d; }

/* ── hero + home bits ── */
.hero { padding: 20px 0 4px; }
.stat-row { display: flex; gap: 40px; flex-wrap: wrap; margin: 26px 0 8px; }
.stat b { font-size: 30px; font-weight: 500; letter-spacing: -0.02em; display: block; line-height: 1.1; }
.stat span { color: var(--ink-muted); font-size: 14px; }
.callout {
  background: var(--surface); border: 1px solid var(--hairline);
  border-radius: 12px; padding: 16px 18px; margin: 24px 0;
}
.callout p { margin: 0; color: #2c2c2b; }

/* ── catalog index (no cards) ── */
.index-group { margin: 40px 0; }
.index-group > h2 { margin-bottom: 4px; }
.index-list { margin-top: 8px; border-top: 1px solid var(--hairline); }
.index-list .index-row {
  display: grid;
  grid-template-columns: minmax(160px, 240px) 1fr auto;
  gap: 20px;
  align-items: baseline;
  padding: 14px 12px;
  margin: 0 -12px;
  border-radius: 8px;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink);
  text-decoration: none;
}
.index-list .index-row:hover {
  background: var(--surface-2);
  border-bottom-color: transparent;
}
.index-list .index-row:hover .row-name {
  text-decoration: underline;
  text-decoration-color: var(--ink);
  text-underline-offset: 3px;
}
.row-name { font-weight: 500; }
.row-sum { color: var(--ink-muted); font-size: 14.5px; }
.row-sev { display: inline-flex; gap: 5px; align-items: center; padding-top: 4px; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex: none; }
.dot-critical { background: var(--critical); }
.dot-warning { background: var(--warning); }
.dot-info { background: var(--info); }
.legend { display: inline-flex; gap: 14px; flex-wrap: wrap; align-items: center; color: var(--ink-muted); font-size: 14px; }
.legend span { display: inline-flex; gap: 6px; align-items: center; }
@media (max-width: 640px) {
  .index-row { grid-template-columns: 1fr auto; }
  .row-sum { grid-column: 1 / -1; }
}

/* ── footer + OpenSEO badge ── */
/* The band fills to the bottom of the page (no body padding beneath it). Extra
   bottom padding keeps the footer text clear of the fixed badge, which floats
   in the empty band space below the row. */
.foot { background: var(--footer-bg); border-top: 1px solid var(--hairline); margin-top: 64px; }
.foot-inner {
  padding: 26px 24px 76px; color: var(--ink-muted); font-size: 14px;
  display: flex; justify-content: space-between; gap: 8px 24px; flex-wrap: wrap;
}
.foot-inner a { color: var(--ink-muted); }
.foot-inner a:hover { color: var(--ink); }
.foot-links { display: flex; gap: 18px; }

.openseo-badge {
  position: fixed; right: 20px; bottom: 20px; z-index: 50;
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink); color: #ffffff;
  border-radius: 999px; padding: 11px 17px;
  font-size: 14px; font-weight: 500;
}
.openseo-badge:hover { background: #000000; text-decoration: none; }
.openseo-badge strong { font-weight: 600; }
.openseo-mark {
  width: 22px; height: 24px; flex: none;
  background: url("/openseo-logo.png") center / contain no-repeat;
  /* The source logo is a silver tree on transparent; render it white so it
     reads on the dark pill with no backing chip. */
  filter: brightness(0) invert(1);
}
@media (max-width: 640px) {
  .openseo-badge .badge-label { display: none; }
  .openseo-badge { padding: 10px 12px; }
}