:root {
  color-scheme: light dark;
  --bg: #fbfaf8;
  --fg: #1d2321;
  --muted: #5d6b66;
  --line: #e2e0da;
  --card: #ffffff;
  --accent: #2d6a4f;
  --direction: #e26d5c;
  --form: #f2a65a;
  --variation: #b9bfc4;
  --maxw: 62rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181a;
    --fg: #e8eceb;
    --muted: #9aa8a3;
    --line: #2a3134;
    --card: #1b2124;
    --accent: #74c69d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Hiragino Sans", "Noto Sans JP", sans-serif;
  padding: 0 1.2rem 5rem;
}
header, section, footer { max-width: var(--maxw); margin: 0 auto; }
header { padding: 3.2rem 0 2rem; border-bottom: 1px solid var(--line); }
h1 { font-size: clamp(2.4rem, 6vw, 3.4rem); margin: 0; letter-spacing: -0.02em; }
.tagline { font-size: 1.2rem; color: var(--accent); font-weight: 600; margin: .4rem 0 1.4rem; }
.lede { max-width: 46rem; color: var(--fg); margin: 0 0 .9rem; }
.links { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.4rem; }
.links a {
  border: 1px solid var(--line); border-radius: 999px; padding: .4rem .95rem;
  text-decoration: none; color: var(--fg); font-size: .92rem; background: var(--card);
}
.links a:hover { border-color: var(--accent); color: var(--accent); }
section { padding: 2.6rem 0; border-bottom: 1px solid var(--line); }
h2 { font-size: 1.45rem; margin: 0 0 .9rem; letter-spacing: -0.01em; }
h3 { font-size: .82rem; text-transform: uppercase; letter-spacing: .09em;
     color: var(--muted); margin: 0 0 .7rem; }
p { margin: 0 0 .9rem; }
.note, .fineprint { color: var(--muted); font-size: .92rem; }
.controls { display: flex; flex-wrap: wrap; gap: 1.2rem; margin: 1.4rem 0 .6rem; }
.group { display: flex; flex-wrap: wrap; gap: .4rem; }
button {
  font: inherit; font-size: .9rem; padding: .42rem .9rem; cursor: pointer;
  background: var(--card); color: var(--fg);
  border: 1px solid var(--line); border-radius: 8px;
}
button:hover { border-color: var(--accent); }
button[aria-pressed="true"] {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.blurb { color: var(--muted); font-size: .95rem; margin: .3rem 0 1.1rem; }
.panes { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
@media (max-width: 800px) { .panes { grid-template-columns: 1fr; } }
.pane { background: var(--card); border: 1px solid var(--line);
        border-radius: 12px; padding: 1.1rem 1.2rem; min-width: 0; }
pre.body {
  white-space: pre-wrap; word-break: break-word; margin: 0;
  font: inherit; line-height: 2.05;
}
mark { padding: .1em .12em; border-radius: 4px; color: inherit;
       background: none; box-shadow: inset 0 -0.62em 0 var(--hl); }
mark.direction { --hl: rgba(226,109,92,.42); }
mark.form { --hl: rgba(242,166,90,.42); }
mark.variation { --hl: rgba(185,191,196,.42); }
.legend { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0 .2rem; }
.chip { font-size: .78rem; padding: .16rem .55rem; border-radius: 999px;
        border: 1px solid var(--line); color: var(--muted); }
.chip.direction { border-color: var(--direction); color: var(--direction); }
.chip.form { border-color: var(--form); }
.chip.variation { border-color: var(--variation); }
.timing { color: var(--muted); font-size: .84rem; margin: .5rem 0 0; }
.finding { border-top: 1px solid var(--line); padding: .95rem 0; }
.finding:first-child { border-top: none; padding-top: 0; }
.finding .head { display: flex; flex-wrap: wrap; gap: .5rem; align-items: baseline; }
.finding .surface { font-weight: 600; }
.finding .type { font-size: .8rem; color: var(--muted); }
.finding .type.ctx { color: var(--direction); font-weight: 600; }
.finding .msg { font-size: .92rem; margin: .45rem 0; }
.finding .alt { font-size: .9rem; }
.finding .alt b { color: var(--accent); }
.finding .cite { font-size: .82rem; color: var(--muted); margin-top: .35rem; }
.finding .cite a { color: var(--muted); }
.quiet { color: var(--muted); }
.ok { color: var(--accent); font-weight: 600; }
figure { margin: 1.4rem 0; }
figure img { width: 100%; height: auto; border: 1px solid var(--line);
             border-radius: 10px; background: #fff; }
figcaption { color: var(--muted); font-size: .88rem; margin-top: .55rem; }
blockquote {
  margin: 1rem 0; padding: .7rem 0 .7rem 1.1rem;
  border-left: 3px solid var(--accent); color: var(--fg);
}
blockquote .gloss { display: block; color: var(--muted); font-size: .88rem; margin-top: .4rem; }
pre.code {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: .9rem 1.1rem; overflow-x: auto; font-size: .88rem; line-height: 1.6;
}
table { border-collapse: collapse; width: 100%; font-size: .9rem; margin: 1rem 0; }
th, td { text-align: left; padding: .45rem .6rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: .82rem; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.hl td { font-weight: 600; }
footer { padding-top: 2.4rem; }