:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #1f2328;
  --muted: #646b73;
  --line: #e2e0d8;
  --accent: #1d5c4d;
  --accent-soft: #e5efeb;
  --code-bg: #f1efe8;
  --mark: #fff4d6;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15181b;
    --surface: #1c2024;
    --text: #e6e8ea;
    --muted: #9aa3ab;
    --line: #2e343a;
    --accent: #7cc4ad;
    --accent-soft: #1f302b;
    --code-bg: #24292e;
    --mark: #3a3420;
  }
}
:root[data-theme="dark"] {
  --bg: #15181b;
  --surface: #1c2024;
  --text: #e6e8ea;
  --muted: #9aa3ab;
  --line: #2e343a;
  --accent: #7cc4ad;
  --accent-soft: #1f302b;
  --code-bg: #24292e;
  --mark: #3a3420;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.01em;
}

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  height: 52px; padding: 0 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.brand { color: var(--text); text-decoration: none; font-weight: 700; font-size: 15px; }
.brand span { color: var(--muted); font-weight: 400; margin-left: 6px; font-size: 13px; }
.menu {
  display: none;
  font: inherit; font-size: 13px;
  background: transparent; color: var(--text);
  border: 1px solid var(--line); border-radius: 6px; padding: 4px 12px; cursor: pointer;
}

.layout { display: flex; max-width: 1180px; margin: 0 auto; }
.sidebar {
  flex: 0 0 240px;
  position: sticky; top: 52px; align-self: flex-start;
  height: calc(100vh - 52px); overflow-y: auto;
  padding: 28px 16px 24px 20px;
  border-right: 1px solid var(--line);
}
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li { margin: 2px 0; }
.sidebar a {
  display: block; padding: 7px 10px; border-radius: 6px;
  color: var(--muted); text-decoration: none; font-size: 14px; line-height: 1.5;
}
.sidebar a:hover { color: var(--text); background: var(--accent-soft); }
.sidebar a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.built { margin-top: 24px; padding: 0 10px; color: var(--muted); font-size: 12px; }

.doc {
  flex: 1 1 auto; min-width: 0;
  max-width: 820px;
  padding: 36px 48px 96px;
}
.doc h1 { font-size: 26px; line-height: 1.45; margin: 0 0 8px; letter-spacing: 0; }
.doc h2 {
  font-size: 20px; line-height: 1.5; margin: 48px 0 14px;
  padding-bottom: 6px; border-bottom: 1px solid var(--line);
}
.doc h3 { font-size: 17px; margin: 32px 0 10px; }
.doc p, .doc ul, .doc ol { margin: 0 0 14px; }
.doc ul, .doc ol { padding-left: 1.4em; }
.doc li { margin: 4px 0; }
.doc li > ul, .doc li > ol { margin: 4px 0 0; }
.doc a { color: var(--accent); text-underline-offset: 3px; }
.doc strong { font-weight: 700; background: linear-gradient(transparent 62%, var(--mark) 62%); }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
.doc blockquote {
  margin: 0 0 18px; padding: 12px 18px;
  background: var(--accent-soft); border-left: 3px solid var(--accent); border-radius: 0 6px 6px 0;
}
.doc blockquote p:last-child { margin-bottom: 0; }
.doc code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em; background: var(--code-bg); padding: 1px 6px; border-radius: 4px;
}
.doc pre { background: var(--code-bg); padding: 14px 16px; border-radius: 8px; overflow-x: auto; }
.doc pre code { background: none; padding: 0; }

.doc table {
  display: block; overflow-x: auto;
  border-collapse: collapse; margin: 0 0 18px; font-size: 14.5px; line-height: 1.6;
  max-width: 100%;
}
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 12px; vertical-align: top; text-align: left; }
.doc th { background: var(--accent-soft); font-weight: 600; white-space: nowrap; }
.doc tbody tr:nth-child(even) td { background: color-mix(in srgb, var(--surface) 60%, transparent); }

@media (max-width: 860px) {
  .menu { display: inline-block; }
  .sidebar {
    display: none;
    position: fixed; top: 52px; left: 0; right: 0; bottom: 0;
    height: auto; z-index: 9;
    background: var(--surface); border-right: 0;
    padding: 16px;
  }
  body.nav-open .sidebar { display: block; }
  .doc { padding: 24px 16px 72px; }
  .doc h1 { font-size: 22px; }
  .doc h2 { font-size: 18px; margin-top: 40px; }
}
.navhead { margin: 22px 0 4px; padding: 0 10px; font-size: 12px; font-weight: 700; color: var(--muted); letter-spacing: 0.06em; }