/* Hyperdot's site: system fonts, no external requests, light and dark from the reader's setting.
   The colour pairs are held to WCAG 2.2 AA by tests/Test-Site.ps1, which computes their contrast ratios. */
:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #57606a;
  --link: #0550ae;
  --surface: #f6f8fa;
  --code-bg: #eff1f3;
  --border: #d0d7de;
  --focus: #0550ae;
  --measure: 70ch;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9da7b3;
    --link: #79b8ff;
    --surface: #161b22;
    --code-bg: #1f2630;
    --border: #3d444d;
    --focus: #79b8ff;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}
a { color: var(--link); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 2px; }
main:focus { outline: none; }

.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  padding: 0.5rem 0.75rem; background: var(--fg); color: var(--bg); border-radius: 4px;
}
.skip:focus { top: 0.5rem; }

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.site-nav {
  max-width: 76rem; margin: 0 auto; padding: 0.5rem 1rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem 1.25rem;
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.1rem 0.9rem; }
.site-nav li a { display: inline-block; padding: 0.3rem 0; color: var(--fg); text-decoration: none; }
.site-nav li a:hover { text-decoration: underline; }
.site-nav a[aria-current="page"] { color: var(--link); text-decoration: underline; text-decoration-thickness: 2px; }

/* Page */
.page { max-width: 76rem; margin: 0 auto; padding: 1rem 1rem 3rem; }
main { max-width: 52rem; min-width: 0; }
main > :first-child { margin-top: 0.5rem; }
p, li, dd, blockquote, details, figcaption, .note { max-width: var(--measure); }
/* The README centres its header with align="center": those lines take the column's width. */
p[align="center"] { max-width: none; }
/* A table whose header row is empty (the README's "| | |" tables) shows no empty row. */
thead:not(:has(th:not(:empty))) { display: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; margin: 1.8em 0 0.6em; scroll-margin-top: 1rem; }
h1 { font-size: 2rem; margin-top: 0.6em; }
h2 { font-size: 1.5rem; padding-bottom: 0.25em; border-bottom: 1px solid var(--border); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }
img { max-width: 100%; height: auto; }
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
blockquote { margin: 1rem 0; padding: 0 1rem; border-left: 4px solid var(--border); color: var(--muted); }
ul, ol { padding-left: 1.6rem; }
li + li { margin-top: 0.2rem; }
.site-nav li + li, .groups li + li { margin-top: 0; }
li.task-list-item { list-style: none; }
li.task-list-item input { margin: 0 0.4rem 0 -1.3rem; }
details { margin: 1rem 0; }
summary { cursor: pointer; }
.note { padding: 0.75rem 1rem; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; }
.from { color: var(--muted); font-size: 0.95rem; }

/* Code */
code, pre, kbd, samp { font-family: ui-monospace, SFMono-Regular, "Cascadia Mono", Menlo, Consolas, "Liberation Mono", monospace; font-size: 0.875em; }
:not(pre) > code { background: var(--code-bg); color: var(--fg); padding: 0.1em 0.35em; border-radius: 4px; overflow-wrap: anywhere; }
pre {
  background: var(--code-bg); color: var(--fg); padding: 0.85rem 1rem; border-radius: 6px;
  overflow-x: auto; line-height: 1.45; tab-size: 4;
}
pre code { font-size: inherit; }

/* Tables scroll in their own box, never the page */
.table-wrap { overflow-x: auto; margin: 1rem 0; border: 1px solid var(--border); border-radius: 6px; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { padding: 0.45rem 0.7rem; border-bottom: 1px solid var(--border); vertical-align: top; text-align: left; }
th { background: var(--surface); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td code, th code { overflow-wrap: break-word; }

/* Home: the README's centred header and its badges, shown as text */
.page-home main { max-width: 56rem; }
.badge { display: inline-block; margin: 0.15rem 0.1rem; padding: 0.05rem 0.5rem; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--fg); font-size: 0.85rem; }
a .badge { color: var(--link); }

/* Table of contents: above the page on small screens, beside it on wide ones */
.toc { margin: 0 0 1rem; padding: 0.5rem 0.9rem; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; font-size: 0.95rem; }
.toc summary { font-weight: 600; }
.toc ul { list-style: none; margin: 0.4rem 0; padding-left: 0; }
.toc ul ul { padding-left: 1rem; margin: 0.15rem 0; }
.toc li { margin: 0.15rem 0; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }
@media (min-width: 75rem) {
  .page.has-toc { display: grid; grid-template-columns: minmax(0, 52rem) 16rem; gap: 3rem; align-items: start; }
  .page.has-toc main { grid-row: 1; grid-column: 1; }
  .page.has-toc .toc { grid-row: 1; grid-column: 2; position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow-y: auto; margin-top: 1.5rem; }
}

/* Docs index and search */
.groups ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; }
.doc-list { list-style: none; padding: 0; }
.doc-list > li { margin: 0 0 0.9rem; }
.doc-list > li > a { font-weight: 600; }
.doc-list p { margin: 0.1rem 0 0; color: var(--muted); }
.search { margin: 1rem 0 1.5rem; }
.search label { display: block; font-weight: 600; margin-bottom: 0.3rem; }
.search input { width: 100%; max-width: 28rem; padding: 0.45rem 0.6rem; font: inherit; color: var(--fg); background: var(--bg); border: 1px solid var(--muted); border-radius: 6px; }
#search-results { list-style: none; padding: 0; margin: 0.6rem 0 0; }
#search-results li { margin: 0.25rem 0; }
#search-results span { color: var(--muted); font-size: 0.9rem; }

/* Labels */
.labels { display: grid; grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); gap: 1.25rem; margin: 1rem 0 1.5rem; }
figure.label { margin: 0; }
figure.label img { display: block; width: 100%; max-width: 16rem; border-radius: 10px; }
figure.label figcaption { font-size: 0.92rem; margin-top: 0.4rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); color: var(--muted); font-size: 0.9rem; }
.site-footer p { max-width: 76rem; margin: 0 auto; padding: 1rem; }

@media (max-width: 40rem) {
  body { font-size: 1rem; }
  h1 { font-size: 1.65rem; }
  h2 { font-size: 1.3rem; }
  .site-nav { gap: 0.1rem 1rem; }
}
@media print {
  .site-header, .site-footer, .toc, .skip, .search { display: none; }
}