/* SPDX-FileCopyrightText: 2026 CubieCode */
/* SPDX-License-Identifier: MIT */
/* System fonts only, so the site makes no third-party requests. */
:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f5f6f8;
  --text: #1b1f24;
  --muted: #5b6470;
  --border: #dde1e6;
  --link: #1f5fbf;
  --code-bg: #eef0f3;
  --notice-bg: #fff6e0;
  --notice-border: #e0b84a;
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --surface: #181c21;
    --text: #e6e8eb;
    --muted: #9aa3ad;
    --border: #2c323a;
    --link: #7fb0ff;
    --code-bg: #1f242b;
    --notice-bg: #2b2416;
    --notice-border: #8a6d22;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
}
a {
  color: var(--link);
}
.skip {
  position: absolute;
  left: -999px;
}
.skip:focus {
  left: 16px;
  top: 8px;
}
.masthead {
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
}
.brand {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}
.brand span {
  color: var(--muted);
  font-weight: 400;
}
.shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px;
}
.sidebar {
  position: sticky;
  top: 16px;
  align-self: start;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  font-size: 14px;
}
.sidebar ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sidebar li {
  margin: 4px 0;
}
.sidebar a {
  color: var(--text);
  text-decoration: none;
}
.sidebar a:hover,
.sidebar a[aria-current='page'] {
  color: var(--link);
}
.sidebar a[aria-current='page'] {
  font-weight: 600;
}
.toc {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.toc summary {
  margin: 0 0 8px;
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
/* Open beside the page on wide screens, collapsed above it on narrow ones. */
@media (min-width: 801px) {
  .toc::details-content {
    content-visibility: visible;
    block-size: auto;
  }
  .toc summary {
    pointer-events: none;
    list-style: none;
  }
}
main {
  min-width: 0;
  max-width: 820px;
}
main h1 {
  margin-top: 0;
  line-height: 1.2;
}
main h2 {
  margin-top: 2em;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}
/* Collapsed detail in a page: implementation notes, limits and reasoning. */
main details {
  margin: 16px 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
}
main summary {
  padding: 10px 14px;
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}
main summary:hover {
  color: var(--text);
}
main summary:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
  border-radius: 6px;
}
main details[open] > summary {
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
main details > :not(summary) {
  margin-left: 14px;
  margin-right: 14px;
}
main details > .table-wrap {
  margin: 16px 14px;
}
main details > :last-child {
  margin-bottom: 14px;
}
main details > ul,
main details > ol {
  padding-left: 20px;
}
main details pre,
main details code {
  background: var(--bg);
}
code {
  background: var(--code-bg);
  border-radius: 4px;
  padding: 0.1em 0.3em;
  font: 0.9em var(--mono);
  overflow-wrap: anywhere;
}
pre {
  background: var(--code-bg);
  border-radius: 6px;
  padding: 12px 16px;
  overflow-x: auto;
}
pre code {
  padding: 0;
  overflow-wrap: normal;
}
.table-wrap {
  overflow-x: auto;
  margin: 16px 0;
}
table {
  border-collapse: collapse;
  font-size: 14px;
}
th,
td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
  vertical-align: top;
}
th {
  background: var(--surface);
}
td code {
  overflow-wrap: normal;
}
.notice {
  background: var(--notice-bg);
  border-left: 4px solid var(--notice-border);
  padding: 8px 12px;
}
.pages {
  padding: 0;
  list-style: none;
}
.pages li {
  margin: 16px 0;
}
.pages a {
  font-size: 18px;
  font-weight: 600;
}
.pages p {
  margin: 4px 0 0;
  color: var(--muted);
}
footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
  padding: 16px;
  text-align: center;
}
@media (max-width: 800px) {
  .shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }
  .sidebar {
    position: static;
    max-height: none;
  }
  .sidebar > nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 16px;
  }
}