/* Shell for the documentation site: header, sidebar, contents rail, pager.
   Content styling comes from xtxt.css, the same stylesheet the CLI emits, so
   the site and `xtxt export html` cannot look like different products. */

:root {
  --sidebar-w: 16.5rem;
  --toc-w: 14rem;
  --top-h: 3.25rem;
}

body.docs {
  margin: 0;
  max-width: none;
  padding: 0;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--bg);
  color: var(--fg);
  padding: .6rem 1rem;
  z-index: 20;
}
.skip:focus { left: 0; }

/* ---- top bar ---- */
.docs-top {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--top-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 1.2rem;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.docs-top .brand {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  color: var(--fg);
}
.docs-top .top-links {
  display: flex;
  gap: 1.1rem;
  font-size: .85rem;
}
.docs-top .top-links a { color: var(--muted); text-decoration: none; }
.docs-top .top-links a:hover { color: var(--accent); }

/* ---- three-column layout ---- */
.docs-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  gap: 2.5rem;
  align-items: start;
  max-width: 84rem;
  margin: 0 auto;
  padding: 0 1.2rem;
}

/* ---- sidebar ---- */
.sidebar {
  position: sticky;
  top: var(--top-h);
  max-height: calc(100vh - var(--top-h));
  overflow-y: auto;
  padding: 1.6rem 0 3rem;
}
.sidebar ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: page;
}
.sidebar li { margin: 0; }
.sidebar a {
  display: block;
  padding: .34rem .7rem .34rem 0;
  font-size: .9rem;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  padding-left: .9rem;
}
.sidebar a:hover { color: var(--fg); }
.sidebar li.current > a {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

/* ---- content ---- */
.docs-content {
  min-width: 0;
  padding: 1.6rem 0 4rem;
}
.docs-content > h1:first-child { margin-top: .2rem; }

/* ---- on-this-page ---- */
.toc {
  position: sticky;
  top: var(--top-h);
  max-height: calc(100vh - var(--top-h));
  overflow-y: auto;
  padding: 1.9rem 0 3rem;
  font-size: .82rem;
}
.toc-label {
  margin: 0 0 .5rem;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: .68rem;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc a {
  display: block;
  padding: .2rem 0;
  color: var(--muted);
  text-decoration: none;
  line-height: 1.4;
}
.toc a:hover { color: var(--accent); }
.toc .lvl-3 { padding-left: .85rem; }

/* ---- prev / next ---- */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  flex: 1 1 0;
  max-width: 22rem;
  padding: .8rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  text-decoration: none;
  color: var(--fg);
  font-weight: 600;
  font-size: .95rem;
}
.pager a:hover { border-color: var(--accent); }
.pager .next { text-align: right; }
.pager span {
  display: block;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: .68rem;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: .2rem;
}

.docs-foot {
  border-top: 1px solid var(--rule);
  margin-top: 2rem;
  padding: 1.4rem 1.2rem 3rem;
  text-align: center;
  color: var(--muted);
  font-size: .82rem;
}
.docs-foot p { margin: 0; }

/* ---- narrow screens ---- */
@media (max-width: 68rem) {
  .docs-layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 48rem) {
  .docs-layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .sidebar {
    position: static;
    max-height: none;
    padding: 1rem 0;
    border-bottom: 1px solid var(--rule);
  }
  .sidebar ol {
    display: flex;
    flex-wrap: wrap;
    gap: .2rem .4rem;
  }
  .sidebar a {
    border-left: 0;
    border-radius: 999px;
    padding: .3rem .8rem;
    border: 1px solid var(--rule);
  }
  .sidebar li.current > a { border-color: var(--accent); }
  .pager { flex-direction: column; }
  .pager .next { text-align: left; }
}