:root {
  --bg: #f4efe3; --surface: #fffdf7; --surface-2: #f9f4e8; --ink: #1c1b18; --muted: #6a6556; --line: #e3dbc7;
  --accent: #c2410c; --accent-ink: #fff7ec; --code-bg: #1c1b18; --code-ink: #f1ebdc;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, ui-serif, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12110e; --surface: #1b1a16; --surface-2: #23211b; --ink: #f1ebdc; --muted: #a39c88; --line: #2f2c23;
    --accent: #ff8a4c; --accent-ink: #1b1005; --code-bg: #0c0b09; --code-ink: #f1ebdc; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12110e; --surface: #1b1a16; --surface-2: #23211b; --ink: #f1ebdc; --muted: #a39c88; --line: #2f2c23;
  --accent: #ff8a4c; --accent-ink: #1b1005; --code-bg: #0c0b09; --code-ink: #f1ebdc; color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 var(--sans); -webkit-text-size-adjust: 100%; overflow-x: hidden; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-ink); padding: 0.5rem 1rem; z-index: 100; }
.skip:focus { left: 0; }

.bar { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 0.75rem; padding: 0.6rem 1rem; background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; color: var(--ink); text-decoration: none; font-family: var(--serif); font-size: 1.1rem; white-space: nowrap; }
.brand b { color: var(--accent); }
.brand em { font-style: normal; color: var(--muted); font-family: var(--sans); font-size: 0.8rem; border: 1px solid var(--line); border-radius: 999px; padding: 0 0.5rem; margin-left: 0.2rem; }
.mark { width: 26px; height: 26px; flex: none; }
.mark rect { fill: var(--accent); }
.mark path { stroke: var(--accent-ink); stroke-width: 3; stroke-linecap: round; fill: none; }
.links { display: flex; gap: 0.2rem; margin-left: auto; }
.links a { color: var(--muted); text-decoration: none; padding: 0.3rem 0.6rem; border-radius: 8px; font-size: 0.9rem; }
.links a:hover { color: var(--ink); background: var(--surface-2); }
.icon, .search-open { font: inherit; display: inline-flex; align-items: center; gap: 0.45rem; color: var(--muted); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; min-height: 36px; padding: 0 0.6rem; cursor: pointer; }
.icon:hover, .search-open:hover { color: var(--accent); border-color: var(--accent); }
.icon:active, .search-open:active { transform: translateY(1px); }
.icon svg, .search-open svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.menu { display: none; }
.search-open { margin-left: 0.5rem; min-width: 11rem; }
.search-open kbd { margin-left: auto; font-family: var(--mono); font-size: 0.75rem; border: 1px solid var(--line); border-radius: 5px; padding: 0 0.35rem; }

.shell { display: grid; grid-template-columns: 15rem minmax(0, 1fr) 14rem; gap: 2rem; max-width: 80rem; margin: 0 auto; padding: 0 1rem; }
.side { position: sticky; top: 4rem; align-self: start; max-height: calc(100vh - 5rem); overflow-y: auto; padding: 1.5rem 0; }
.side ul { list-style: none; margin: 0; padding: 0; }
.side a { display: block; padding: 0.35rem 0.7rem; border-radius: 8px; color: var(--muted); text-decoration: none; font-size: 0.92rem; }
.side a:hover { color: var(--ink); background: var(--surface-2); }
.side a[aria-current="page"] { color: var(--accent); background: var(--surface-2); font-weight: 600; }
.side-note { margin: 1rem 0 0 0.7rem; font-size: 0.8rem; }
.doc { min-width: 0; padding: 2rem 0 4rem; }
.doc article { max-width: 46rem; }
.doc h1, .doc h2, .doc h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -0.01em; line-height: 1.2; }
.doc h1 { font-size: clamp(2rem, 5vw, 2.8rem); margin: 0 0 1rem; }
.doc h2 { font-size: 1.55rem; margin: 2.6rem 0 0.7rem; padding-top: 0.4rem; border-top: 1px solid var(--line); }
.doc h3 { font-size: 1.15rem; margin: 1.8rem 0 0.5rem; }
.doc h2 .anchor, .doc h3 .anchor { margin-left: 0.4rem; opacity: 0; text-decoration: none; font-family: var(--mono); font-size: 0.8em; }
.doc h2:hover .anchor, .doc h3:hover .anchor, .anchor:focus-visible { opacity: 0.7; }
.doc p, .doc li { overflow-wrap: anywhere; }
.doc li { margin: 0.25rem 0; }
.doc code { font-family: var(--mono); font-size: 0.88em; background: var(--surface-2); border: 1px solid var(--line); border-radius: 6px; padding: 0.05em 0.35em; }
.code-block { position: relative; margin: 1rem 0; }
.code-block pre { margin: 0; background: var(--code-bg); color: var(--code-ink); border-radius: 12px; padding: 1rem 1.1rem; overflow-x: auto; font-size: 0.86rem; line-height: 1.55; }
.code-block pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.copy { position: absolute; top: 0.5rem; right: 0.5rem; font: inherit; font-size: 0.75rem; color: var(--code-ink); background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 8px; padding: 0.2rem 0.6rem; cursor: pointer; opacity: 0.85; }
.copy:hover, .copy:focus-visible { opacity: 1; background: rgba(255, 255, 255, 0.2); }
.copy:active { transform: translateY(1px); }
.table-wrap { overflow-x: auto; margin: 1rem 0; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th { text-align: left; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--line); white-space: nowrap; }
td { padding: 0.55rem 0.8rem; border-bottom: 1px solid var(--line); vertical-align: top; min-width: 7rem; }
tr:last-child td { border-bottom: 0; }
blockquote { margin: 1rem 0; padding: 0.2rem 1rem; border-left: 3px solid var(--accent); background: var(--surface-2); border-radius: 0 10px 10px 0; color: var(--muted); }
.toc { position: sticky; top: 4rem; align-self: start; max-height: calc(100vh - 5rem); overflow-y: auto; padding: 2rem 0; font-size: 0.85rem; }
.toc h2 { font-family: var(--sans); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 0 0 0.5rem; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.toc a { display: block; padding: 0.2rem 0 0.2rem 0.8rem; color: var(--muted); text-decoration: none; }
.toc a:hover, .toc a[aria-current="true"] { color: var(--accent); }
.toc .d3 a { padding-left: 1.6rem; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; max-width: 46rem; margin-top: 3rem; }
.pager a { display: block; border: 1px solid var(--line); border-radius: 12px; padding: 0.8rem 1rem; background: var(--surface); color: var(--ink); text-decoration: none; font-weight: 600; }
.pager a:hover { border-color: var(--accent); color: var(--accent); }
.pager a span { display: block; font-size: 0.74rem; font-weight: 400; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.pager .next { text-align: right; grid-column: 2; }
.doc-foot { max-width: 46rem; margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.82rem; }

.search { position: fixed; inset: 0; z-index: 50; background: rgba(0, 0, 0, 0.5); display: flex; justify-content: center; align-items: flex-start; padding: 8vh 1rem 1rem; }
.search[hidden] { display: none; }
.search-box { width: 100%; max-width: 38rem; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 0.8rem; box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.6); max-height: 80vh; display: flex; flex-direction: column; }
.search input { font: inherit; width: 100%; padding: 0.7rem 0.9rem; background: var(--bg); color: var(--ink); border: 1px solid var(--line); border-radius: 10px; }
.search input:focus-visible { outline: 2px solid var(--accent); }
.search ul { list-style: none; margin: 0.6rem 0 0; padding: 0; overflow-y: auto; }
.search li a { display: block; padding: 0.55rem 0.7rem; border-radius: 10px; color: var(--ink); text-decoration: none; }
.search li a:hover, .search li a[aria-selected="true"] { background: var(--surface-2); }
.search li b { display: block; font-size: 0.95rem; }
.search li small { display: block; color: var(--muted); font-size: 0.82rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search mark { background: color-mix(in srgb, var(--accent) 25%, transparent); color: inherit; border-radius: 3px; }
.search-hint { margin: 0.6rem 0 0; color: var(--muted); font-size: 0.8rem; }

@media (max-width: 1100px) { .shell { grid-template-columns: 14rem minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 800px) {
  .shell { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .menu { display: inline-flex; }
  .links { display: none; }
  .search-open { margin-left: auto; min-width: 0; }
  .search-open span, .search-open kbd { display: none; }
  .brand em { display: none; }
  .side { position: fixed; top: 3.4rem; left: 0; bottom: 0; width: min(18rem, 86vw); z-index: 25; background: var(--bg); border-right: 1px solid var(--line); padding: 1rem; transform: translateX(-102%); max-height: none; }
  .side[data-open="true"] { transform: none; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; }
}
@media (prefers-reduced-motion: no-preference) { .side { transition: transform 0.18s ease; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }