/* AssayLink documentation — self-contained, print-friendly, offline-capable. */

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --brand: #1c53db;
  --brand-soft: #eef5ff;
  --brand-ink: #1a3470;
  --ok: #047857;
  --warn: #b45309;
  --max: 1100px;
  --side: 220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font: 16px/1.55 "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code,
kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: #f1f5f9;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}

pre {
  overflow-x: auto;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 8px;
  padding: 1rem 1.1rem;
  font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.65rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.topbar .brand {
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.topbar .brand span {
  color: var(--brand);
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.85rem;
  flex: 1;
  font-size: 0.92rem;
}

.topbar .export {
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
}

.layout {
  display: grid;
  grid-template-columns: var(--side) minmax(0, 1fr);
  gap: 1.5rem;
  max-width: calc(var(--max) + var(--side) + 3rem);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.toc {
  position: sticky;
  top: 3.5rem;
  align-self: start;
  font-size: 0.85rem;
}

.toc h2 {
  margin: 0 0 0.6rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc li {
  margin: 0.3rem 0;
}

.toc a {
  color: var(--muted);
}

.toc a:hover {
  color: var(--brand);
}

.content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.75rem 1.85rem 2.25rem;
  max-width: var(--max);
}

.content > h1 {
  margin: 0 0 0.4rem;
  font-size: 1.85rem;
  letter-spacing: -0.02em;
}

.lede {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.5rem;
}

h2 {
  margin: 2rem 0 0.65rem;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  border-top: 1px solid var(--line);
  padding-top: 1.4rem;
}

h2:first-of-type {
  border-top: 0;
  padding-top: 0;
}

h3 {
  margin: 1.35rem 0 0.45rem;
  font-size: 1.05rem;
}

p,
ul,
ol {
  margin: 0.55rem 0;
}

ul,
ol {
  padding-left: 1.25rem;
}

li {
  margin: 0.25rem 0;
}

.note,
.callout,
.warn {
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin: 1rem 0;
  font-size: 0.95rem;
}

.note,
.callout {
  background: var(--brand-soft);
  border: 1px solid #bcd7ff;
  color: var(--brand-ink);
}

.warn {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #9a3412;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.1rem 1.2rem;
  background: var(--surface);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

a.card:hover {
  border-color: #8ebdff;
  box-shadow: 0 6px 18px rgba(28, 83, 219, 0.08);
  text-decoration: none;
}

.card h2 {
  margin: 0 0 0.35rem;
  border: 0;
  padding: 0;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.card .meta {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--brand);
  font-weight: 600;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 0.85rem 0 1.1rem;
}

th,
td {
  border: 1px solid var(--line);
  padding: 0.45rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f8fafc;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.status-yes {
  color: var(--ok);
  font-weight: 600;
}

.status-partial {
  color: var(--warn);
  font-weight: 600;
}

figure {
  margin: 1.1rem 0 1.4rem;
}

figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

figcaption {
  margin-top: 0.45rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: #f1f5f9;
  color: var(--muted);
  margin-right: 0.35rem;
}

.tag.user {
  background: var(--brand-soft);
  color: var(--brand);
}

.tag.tech {
  background: #ecfdf5;
  color: var(--ok);
}

.hero {
  padding: 2.5rem 1.25rem 1.5rem;
  max-width: calc(var(--max) + var(--side) + 3rem);
  margin: 0 auto;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 2.2rem;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 0 0 0.85rem;
  max-width: 48rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.hero p:last-child {
  margin-bottom: 0;
}

.footer {
  max-width: calc(var(--max) + var(--side) + 3rem);
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media print {
  .topbar,
  .toc,
  .export {
    display: none !important;
  }

  .layout {
    display: block;
    max-width: none;
    padding: 0;
  }

  .content {
    border: 0;
    padding: 0;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  figure img {
    break-inside: avoid;
  }
}