:root {
    --bg: #f7f6f3;
    --surface: #ffffff;
    --surface-2: #f0eee9;
    --text: #1f1d1a;
    --muted: #6b665e;
    --line: #e3dfd7;
    --accent: #c2410c;
    --accent-soft: #fdebdc;
    --jp: #0f766e;
    --jp-soft: #d9f2ee;
    --warn: #b45309;
    --warn-soft: #fef3c7;
    --code-bg: #26231f;
    --code-fg: #f3efe7;
    --radius: 12px;
    --maxw: 1180px;
  }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #15130f;
      --surface: #1f1c17;
      --surface-2: #272319;
      --text: #ece7dd;
      --muted: #a39d92;
      --line: #35302a;
      --accent: #fb923c;
      --accent-soft: #3a2314;
      --jp: #2dd4bf;
      --jp-soft: #123b36;
      --warn: #fbbf24;
      --warn-soft: #3b2e0c;
      --code-bg: #0f0e0b;
      --code-fg: #ece7dd;
    }
  }
  :root[data-theme="dark"] {
    --bg: #15130f;
    --surface: #1f1c17;
    --surface-2: #272319;
    --text: #ece7dd;
    --muted: #a39d92;
    --line: #35302a;
    --accent: #fb923c;
    --accent-soft: #3a2314;
    --jp: #2dd4bf;
    --jp-soft: #123b36;
    --warn: #fbbf24;
    --warn-soft: #3b2e0c;
    --code-bg: #0f0e0b;
    --code-fg: #ece7dd;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
    line-height: 1.75;
    font-size: 15px;
  }
  a { color: var(--accent); text-decoration: none; }
  a:hover { text-decoration: underline; }
  code, pre, kbd {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.88em;
  }
  code { background: var(--surface-2); padding: 0.1em 0.4em; border-radius: 5px; overflow-wrap: anywhere; }
  pre {
    background: var(--code-bg);
    color: var(--code-fg);
    padding: 12px 14px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 12px 0;
    line-height: 1.55;
  }
  pre code { background: none; padding: 0; color: inherit; overflow-wrap: normal; }

  header.hero { border-bottom: 1px solid var(--line); padding: 40px 0 24px; }
  .wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }
  .hero h1 { font-size: 1.9rem; margin: 0 0 6px; letter-spacing: -0.01em; }
  .hero h1 span { color: var(--accent); }
  .hero .lead { color: var(--muted); margin: 0 0 14px; max-width: 780px; }
  .hero .meta { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; font-size: 0.85rem; color: var(--muted); }
  .pill { display: inline-block; border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 2px 10px; font-size: 0.8rem; }
  .pill.warn { border-color: var(--warn); color: var(--warn); background: var(--warn-soft); }
  .hero button {
    font: inherit; font-size: 0.82rem; cursor: pointer; background: var(--surface); color: var(--text);
    border: 1px solid var(--line); border-radius: 999px; padding: 3px 11px;
  }

  .layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 32px; padding-top: 24px; }
  aside.side { position: sticky; top: 12px; align-self: start; max-height: calc(100vh - 24px); overflow-y: auto; font-size: 0.86rem; padding-bottom: 24px; }
  aside.side input {
    width: 100%; font: inherit; padding: 7px 10px; margin-bottom: 12px;
    border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--text);
  }
  aside.side ol { list-style: none; margin: 0; padding: 0; }
  aside.side li a { display: block; color: var(--text); padding: 3px 8px; border-radius: 6px; }
  aside.side li a:hover { background: var(--surface-2); text-decoration: none; }
  aside.side li.sub a { padding-left: 20px; color: var(--muted); font-size: 0.82rem; }
  aside.side .hint { color: var(--muted); font-size: 0.78rem; margin: -6px 0 10px; }
  @media (max-width: 860px) {
    .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
    aside.side { position: static; max-height: none; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
    aside.side ol { display: flex; flex-wrap: wrap; gap: 2px 4px; }
    aside.side li.sub { display: none; }
  }

  main section { padding: 8px 0 28px; scroll-margin-top: 16px; }
  main h2 { font-size: 1.4rem; margin: 18px 0 8px; padding-top: 12px; border-top: 1px solid var(--line); }
  main section:first-child h2 { border-top: none; padding-top: 0; }
  main h3 { font-size: 1.08rem; margin: 22px 0 6px; scroll-margin-top: 16px; }
  main h4 { font-size: 0.98rem; margin: 16px 0 4px; }
  main p { margin: 8px 0; max-width: 820px; }
  main ul { margin: 8px 0; padding-left: 1.3em; max-width: 820px; }
  main li { margin: 3px 0; }
  .muted { color: var(--muted); }

  .callout { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 12px 0; max-width: 820px; }
  .callout.warn { border-left-color: var(--warn); background: var(--warn-soft); }
  .callout.jp { border-left-color: var(--jp); background: var(--jp-soft); }
  .callout p { margin: 4px 0; }

  .tbl { overflow-x: auto; margin: 10px 0 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
  table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
  th, td { text-align: left; vertical-align: top; padding: 8px 12px; border-bottom: 1px solid var(--line); }
  tr:last-child td { border-bottom: none; }
  th { background: var(--surface-2); font-weight: 600; white-space: nowrap; font-size: 0.82rem; color: var(--muted); }
  td:first-child { white-space: nowrap; }
  td:first-child code { font-weight: 600; }
  tr[hidden] { display: none; }
  .yes { color: var(--jp); font-weight: 600; }
  .no { color: var(--muted); }
  .tag { display: inline-block; font-size: 0.72rem; padding: 0 7px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); margin-left: 4px; white-space: nowrap; vertical-align: 1px; }
  .tag.gate { color: var(--warn); border-color: var(--warn); }
  .tag.stream { color: var(--jp); border-color: var(--jp); }

  .flow { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; margin: 12px 0; }
  .flow div { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 0.88rem; }
  .flow b { display: block; font-size: 0.78rem; color: var(--accent); letter-spacing: 0.04em; }

  .noresult { display: none; color: var(--muted); padding: 10px 0; }
  footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; padding: 20px 0 40px; margin-top: 20px; }

  .hero.small { padding: 22px 0 16px; }
  .hero.small .site { font-size: 0.9rem; color: var(--muted); margin: 0 0 4px; }
  .hero.small .site a { color: var(--muted); }
  .hero.small h1 { font-size: 1.6rem; }
  aside.side li.cur > a { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
  main section > h2:first-child { border-top: none; padding-top: 0; margin-top: 4px; }
  nav.pager { display: flex; justify-content: space-between; gap: 12px; margin: 28px 0 8px; flex-wrap: wrap; }
  nav.pager a { flex: 1 1 220px; border: 1px solid var(--line); background: var(--surface); border-radius: 10px; padding: 10px 14px; color: var(--text); }
  nav.pager a:hover { border-color: var(--accent); text-decoration: none; }
  nav.pager a small { display: block; color: var(--muted); font-size: 0.78rem; }
  nav.pager a.next { text-align: right; }
  .cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; padding: 28px 0 8px; }
  .cards a { display: block; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; color: var(--text); }
  .cards a:hover { border-color: var(--accent); text-decoration: none; }
  .cards b { display: block; font-size: 1.02rem; margin-bottom: 4px; }
  .cards .n { color: var(--accent); font-size: 0.8rem; font-weight: 600; }
  .cards p { margin: 0; color: var(--muted); font-size: 0.88rem; }