/* spinney home page: the same flat, square-cornered look as spinney
   itself, with its colours and fonts. */

:root {
  --bg: #fff;
  --fg: #212529;
  --muted: #6c757d;
  --link: #0b5bb5;
  --link-hover: #073e7c;
  --border: #ced4da;
  --header-bg: #eee;
  --event-bg: #f6f6f6;
  --code-bg: #f8f8f8;
  --btn-bg: #e9ecef;
  --btn-hover: #dde1e5;
  --comment: #6a737d;

  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "DejaVu Sans Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1d1f;
    --fg: #e1e3e5;
    --muted: #9aa1a8;
    --link: #79b0f2;
    --link-hover: #a9cdf7;
    --border: #3d4246;
    --header-bg: #26292c;
    --event-bg: #232629;
    --code-bg: #202326;
    --btn-bg: #2f3337;
    --btn-hover: #3a3f44;
    --comment: #8b949e;
  }
}

/* Scrollbars and form controls follow the light or dark scheme too. */
:root { color-scheme: light dark; }

* { box-sizing: border-box; }

html { font-size: 15px; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  line-height: 1.5;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }

h3, h4 { font-weight: 500; line-height: 1.25; }
h3 { font-size: 1.3rem; margin: 0 0 .75rem; }
h4 { font-size: 1.05rem; margin: 0 0 .25rem; }

pre, code { font-family: var(--mono); font-size: .9rem; }
pre { margin: 0; }

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 16px;
}

/* tabbed header, as on a spinney repository page */

.header-tabbed {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.75rem;
}
.header-tabbed h2 {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin: 0;
  padding-top: 1.1rem;
  font-size: 1.6rem;
  font-weight: 500;
}
.logo { width: auto; height: 1.6rem; }
.tagline { margin: .2rem 0 0; color: var(--muted); }

.nav-tabs {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: .75rem 0 -1px;
  padding: 0;
}
.nav-tabs a {
  display: block;
  padding: .35rem 1rem;
  border: 1px solid transparent;
}
.nav-tabs a:hover { text-decoration: none; background: var(--btn-hover); }
.nav-tabs a.active {
  color: var(--fg);
  background: var(--bg);
  border-color: var(--border);
  border-bottom-color: var(--bg);
}

/* sections */

main section { margin-bottom: 2.5rem; scroll-margin-top: 1rem; }
main p { margin: 0 0 1rem; }
h4.sub { margin: 1.5rem 0 .5rem; }

.row {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}
.lead { font-size: 1.15rem; }

.buttons { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.25rem; }
.btn {
  display: inline-block;
  padding: .4rem 1rem;
  background: var(--btn-bg);
  border: 1px solid var(--border);
  color: var(--fg);
}
.btn:hover { background: var(--btn-hover); color: var(--fg); text-decoration: none; }
.btn.primary { background: var(--link); border-color: var(--link); color: var(--bg); }
.btn.primary:hover { background: var(--link-hover); border-color: var(--link-hover); color: var(--bg); }

.card {
  background: var(--event-bg);
  border: 1px solid var(--border);
  padding: 1rem;
}
.clone {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: .5rem .6rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: .82rem;
}
.facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .3rem .9rem;
  margin: 1rem 0 0;
  font-size: .9rem;
}
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.event {
  background: var(--event-bg);
  border: 1px solid var(--border);
  padding: .9rem 1rem;
}
.event p { margin: 0; }

pre.code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: .75rem 1rem;
  margin: 0 0 1rem;
  overflow-x: auto;
  line-height: 1.45;
}
pre.code .c { color: var(--comment); }
.diagram { font-size: .82rem; }

code { background: var(--code-bg); padding: 0 .2em; white-space: nowrap; }
pre code, th code { background: none; padding: 0; }

/* tables */

table { border-collapse: collapse; width: 100%; }
th, td {
  text-align: left;
  vertical-align: top;
  padding: .4rem .6rem;
  border-bottom: 1px solid var(--border);
}
thead th { font-weight: 500; border-bottom-width: 2px; }
.table-wrap { overflow-x: auto; }
.reach { min-width: 640px; font-size: .92rem; }
.reach tbody th { font-weight: 400; color: var(--muted); }
.docs td:first-child { white-space: nowrap; font-family: var(--mono); font-size: .9rem; }

/* a miniature spinney index */

.preview {
  margin: 0 0 2.5rem;
  border: 1px solid var(--border);
}
.preview-bar {
  display: flex;
  align-items: center;
  gap: .35rem;
  padding: .45rem .6rem;
  background: var(--btn-bg);
  border-bottom: 1px solid var(--border);
}
.preview-bar span {
  width: .65rem;
  height: .65rem;
  border-radius: 50%;
  background: var(--border);
}
.preview-bar code {
  margin-left: .6rem;
  padding: .05rem .5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: .78rem;
  color: var(--muted);
}
.preview-body { font-size: .88rem; }
.p-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  padding: .7rem 1rem 0;
}
.p-header strong { font-weight: 500; font-size: 1.15rem; }
.p-tabs { display: flex; list-style: none; margin: .4rem 0 -1px; padding: 0; }
.p-tabs li { padding: .2rem .8rem; color: var(--link); border: 1px solid transparent; }
.p-tabs li.on {
  color: var(--fg);
  background: var(--bg);
  border-color: var(--border);
  border-bottom-color: var(--bg);
}
.p-index { margin: .5rem 0 .25rem; }
.p-index th:first-child, .p-index td:first-child { padding-left: 1rem; }
.p-index a { color: var(--link); font-family: var(--mono); }
.p-index td:nth-child(n+3) { color: var(--muted); white-space: nowrap; }
.p-index tr.group td { color: var(--muted); font-weight: 500; padding-top: .8rem; }
.p-index tbody tr:last-child td { border-bottom: 0; }

.footer {
  border-top: 1px solid var(--border);
  margin-top: 1rem;
  padding: 1rem 16px 2rem;
  color: var(--muted);
  font-size: .85rem;
}

@media (max-width: 760px) {
  .row { grid-template-columns: 1fr; gap: 1.25rem; }
  .p-index th:nth-child(2), .p-index td:nth-child(2):not([colspan]),
  .p-index th:nth-child(3), .p-index td:nth-child(3) { display: none; }
}

/* documentation pages */

.header-tabbed h2 a.home { color: var(--fg); display: inline-flex; align-items: center; gap: .5rem; }
.header-tabbed h2 a.home:hover { color: var(--link-hover); text-decoration: none; }
.header-tabbed h2 .slash { color: var(--muted); }

.docs-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  font-size: .9rem;
}
.sidebar h4 {
  margin: 0 0 .4rem;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
}
.sidebar ol, .sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li a { display: block; padding: .15rem .6rem; }
.doc-list > li { margin-bottom: .2rem; }
.doc-list .toc { margin: .2rem 0 .5rem; }
.doc-list > li > a { color: var(--fg); font-weight: 600; border-left: 2px solid var(--border); }
.doc-list > li > a:hover { color: var(--link-hover); border-left-color: var(--link); }
.doc-list > li > a.active { border-left-color: var(--link); background: var(--event-bg); }
.toc a { color: var(--muted); padding-left: 1.2rem; border-left: 2px solid transparent; }
.toc a:hover { color: var(--link-hover); }

.doc { max-width: 820px; }
.doc h1 { font-size: 1.8rem; font-weight: 500; margin: 0 0 1rem; line-height: 1.25; }
.doc h2 {
  font-size: 1.35rem;
  font-weight: 500;
  margin: 2.25rem 0 .75rem;
  padding-bottom: .3rem;
  border-bottom: 1px solid var(--border);
}
.doc h3 { font-size: 1.12rem; margin: 1.75rem 0 .5rem; }
.doc h4 { margin: 1.25rem 0 .4rem; }
.doc h2, .doc h3, .doc h4 { scroll-margin-top: 1rem; }
.doc p, .doc ul, .doc ol { margin: 0 0 1rem; }
.doc li { margin: .2rem 0; }
.doc li > p { margin: 0 0 .4rem; }
.doc blockquote {
  margin: 0 0 1rem;
  padding: .5rem 1rem;
  border-left: 3px solid var(--border);
  color: var(--muted);
}
.doc blockquote p:last-child { margin: 0; }
.doc code { white-space: normal; overflow-wrap: anywhere; }
.doc pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: .75rem 1rem;
  margin: 0 0 1rem;
  overflow-x: auto;
  line-height: 1.45;
}
.doc pre code { white-space: pre; overflow-wrap: normal; }
.doc table {
  display: block;
  overflow-x: auto;
  margin: 0 0 1rem;
  font-size: .92rem;
}
.doc table code { overflow-wrap: normal; }
.doc hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
.doc table.docs { display: table; }

.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.pager a {
  display: flex;
  flex-direction: column;
  padding: .5rem 1rem;
  border: 1px solid var(--border);
  min-width: 10rem;
}
.pager a:hover { background: var(--event-bg); text-decoration: none; }
.pager .muted { color: var(--muted); font-size: .8rem; }
.pager .next { margin-left: auto; text-align: right; }

@media (max-width: 760px) {
  .docs-layout { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
  .sidebar { position: static; max-height: none; }
  .sidebar .toc { display: none; }
  .doc-list { display: flex; flex-wrap: wrap; gap: .25rem; }
  .doc-list > li { margin: 0; }
  .doc-list > li > a { border: 1px solid var(--border); font-weight: normal; }
  .doc-list > li > a.active { border-color: var(--link); }
  .pager a { min-width: 0; }
}