/* The Filnix wiki: the docs, the explainers and the landing page share this
   stylesheet. It follows the luv workshop wiki (luv.swa.sh): Public Sans,
   a library band with doors, a black status bar, and a justified measure. */

:root {
  color-scheme: light;
  --paper: white;
  --ink: black;
  --muted: #667078;
  --rule: #ded8ce;
  --status-bg: black;
  --status-ink: ivory;
  --accent: #9a3248;
  --code-bg: #f4f1ea;
  --display-font: "Public Sans", helvetica, arial, sans-serif;
  --mono-font: ui-monospace, "SF Mono", menlo, consolas, "DejaVu Sans Mono", monospace;
  --gutter: clamp(1rem, 4vw, 3rem);
  --measure: 68ch;
  --workspace-max: 100rem;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  color: var(--ink);
  background: var(--paper);
  font: 17px/1.45 var(--display-font);
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
}

body { margin: 0; min-height: 100vh; }

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

/* The library band: eyebrow, site name, and the doors. */

.library {
  border-bottom: 1px solid var(--rule);
  background: color-mix(in srgb, var(--paper) 94%, var(--accent));
}

.library-frame {
  display: grid;
  grid-template-columns: minmax(10rem, 0.5fr) minmax(0, 1.5fr);
  gap: 1rem;
  align-items: center;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.eyebrow {
  margin: 0 0 0.1rem;
  color: var(--muted);
  font: 700 0.72rem/1 var(--display-font);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: left;
}

.library h1 {
  margin: 0;
  font: 700 1.25rem/1.1 var(--display-font);
  letter-spacing: -0.02em;
}

.library h1 a { color: inherit; }

.doors { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.15rem; }

.door {
  display: block;
  padding: 0.4rem 0.65rem;
  color: inherit;
  font: 700 0.9rem/1.2 var(--display-font);
  border-bottom: 2px solid transparent;
}

.door:hover, .door:focus-visible {
  border-bottom-color: color-mix(in srgb, var(--accent) 60%, var(--rule));
  text-decoration: none;
  outline: none;
}

.door.selected { border-bottom-color: var(--accent); }

/* The status bar: black, monospace, bold. */

.status {
  position: sticky;
  top: 0;
  z-index: 1;
  font: 700 0.9rem/1.5 var(--mono-font);
  color: var(--status-ink);
  background: var(--status-bg);
}

.status a { color: inherit; }

.status-frame {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 0.3rem;
  padding-bottom: 0.3rem;
}

.crumbs, .status-right { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.crumbs .crumb-sep { margin: 0 0.45em; opacity: 0.55; }
.crumbs a.crumb { opacity: 0.75; }
.crumbs a.crumb:hover { opacity: 1; }

/* The main column. */

.page-frame {
  width: 100%;
  max-width: var(--workspace-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

main.page-frame { padding-top: clamp(1.5rem, 4vw, 3.25rem); padding-bottom: 3rem; }
main.reading { max-width: calc(var(--measure) + 2 * var(--gutter)); }

main.with-toc {
  display: grid;
  grid-template-columns: 15rem minmax(0, var(--measure));
  gap: 3rem;
  justify-content: center;
}

.toc {
  position: sticky;
  top: 2.4rem;
  align-self: start;
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  padding-top: 0.6rem;
  font: 500 0.82rem/1.4 var(--display-font);
}

.toc-title {
  margin-bottom: 0.4rem;
  color: var(--muted);
  font: 700 0.72rem/1 var(--display-font);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.toc ul { list-style: none; margin: 0; padding: 0; }
.toc ul ul { padding-left: 0.8rem; }
.toc li { margin: 0.3rem 0; }
.toc a { color: var(--ink); opacity: 0.8; }
.toc a:hover { color: var(--accent); opacity: 1; text-decoration: none; }

/* Headings and prose. */

h1, h2, h3, h4 { font-family: var(--display-font); line-height: 1.16; font-weight: 800; }
h1 { font-size: 2.2rem; letter-spacing: -0.06em; margin: 0.5rem 0 1.5rem; }
h2 { font-size: 1.3rem; letter-spacing: -0.04em; margin: 2.6rem 0 0.75rem; }
h3 { font-size: 1.1rem; letter-spacing: -0.02em; margin: 2rem 0 0.5rem; font-weight: 700; }
h4 { font-size: 1rem; margin: 1.6rem 0 0.4rem; font-weight: 700; }

/* Pandoc promotes each doc's "# Title" to the page title, so its "##"
   sections are h1 inside the article, "###" h2, and so on. */
.doc h1:not(.title) { font-size: 1.3rem; letter-spacing: -0.04em; margin: 2.6rem 0 0.75rem; }
.doc h2 { font-size: 1.1rem; letter-spacing: -0.02em; margin: 2rem 0 0.5rem; font-weight: 700; }
.doc h3, .doc h4 { font-size: 1rem; margin: 1.6rem 0 0.4rem; font-weight: 700; letter-spacing: 0; }

p { margin: 0 0 1.1rem; text-align: justify; text-align-last: start; hyphens: auto; }

code, pre { font-family: var(--mono-font); font-size: 0.85em; }
code { color: color-mix(in srgb, var(--ink) 80%, var(--accent)); }
pre { background: var(--code-bg); padding: 0.8rem 1rem; overflow-x: auto; line-height: 1.4; }
pre code { color: inherit; }
pre.mermaid { background: none; text-align: center; }

blockquote { margin: 1rem 0; padding: 0.1rem 0 0.1rem 1rem; border-left: 3px solid var(--rule); color: #3d4449; }
table { border-collapse: collapse; margin: 1rem 0; font-size: 0.92em; display: block; overflow-x: auto; }
th, td { text-align: left; vertical-align: top; padding: 0.3rem 0.8rem 0.3rem 0; border-bottom: 1px solid var(--rule); }
th { font-weight: normal; color: var(--muted); }
ul, ol { padding-left: 1.4rem; }
li { margin: 0.25rem 0; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2rem 0; }
img, video { max-width: 100%; height: auto; }

/* Cards, as on the luv wiki's page catalogue. */

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 0.9rem; margin: 1rem 0 2rem; }

.card-link {
  display: block;
  padding: 0.9rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  color: inherit;
}

.card-link:hover { border-color: var(--accent); text-decoration: none; }
.card-link img { display: block; width: 100%; margin-bottom: 0.7rem; border-radius: 3px; border: 1px solid var(--rule); }
.card-link strong { display: block; font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; }
.card-link span { display: block; margin-top: 0.35rem; color: var(--accent); font-size: 0.88rem; line-height: 1.35; }

.site-footer { border-top: 1px solid var(--rule); color: var(--muted); font: 500 0.82rem/1.4 var(--display-font); }
.site-footer .page-frame { padding-top: 1rem; padding-bottom: 3rem; }

@media (max-width: 900px) {
  .library-frame { grid-template-columns: 1fr; }
  .doors { justify-content: flex-start; }
  main.with-toc { display: block; }
  .toc { display: none; }
  p { text-align: left; }
}