/* Resonance Lattice — user docs stylesheet.
   One file, shared by every page in docs/site/. No build step.
   Design tokens lifted from the lensed-knowledge explainer. */

:root {
  --bg: #fafaf7;
  --ink: #1a1a1a;
  --muted: #6b6b66;
  --rule: #e8e6df;
  --source: #5b6770;
  --insight: #c89456;
  --lens: #3a6b6b;
  --memory: #7a7a8a;
  --accent-soft: #f3efe7;
  --code-bg: #f3f1ea;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* --- site header / nav ------------------------------------------------ */

header.site {
  background: #fff;
  border-bottom: 1px solid var(--rule);
}

/* logo row */
header.site .bar {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px 32px 0;
}

header.site .logo { display: inline-flex; }
header.site .logo img { height: 46px; width: auto; display: block; }

/* full nav — its own row, wraps as needed, every page one click away */
nav.site {
  max-width: 1000px;
  margin: 0 auto;
  padding: 12px 32px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  font-size: 14px;
}

nav.site a {
  color: var(--muted);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

nav.site a:hover { color: var(--ink); }

nav.site a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--lens);
}

/* --- content column --------------------------------------------------- */

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 72px 32px 96px;
}

.tagline {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 24px;
}

h1 {
  font-family: 'Charter', 'Iowan Old Style', Georgia, serif;
  font-size: 44px;
  line-height: 1.15;
  margin: 0 0 24px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

h1 em { font-style: italic; color: var(--lens); }

.lede {
  font-size: 20px;
  line-height: 1.55;
  margin: 0 0 16px;
  font-weight: 300;
}

section { margin-bottom: 72px; }

h2 {
  font-family: 'Charter', 'Iowan Old Style', Georgia, serif;
  font-size: 28px;
  line-height: 1.2;
  margin: 0 0 8px;
  font-weight: 500;
  letter-spacing: -0.005em;
  scroll-margin-top: 24px;
}

h3 {
  font-family: 'Charter', 'Iowan Old Style', Georgia, serif;
  font-size: 18px;
  margin: 28px 0 8px;
  font-weight: 500;
  scroll-margin-top: 24px;
}

.section-num {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 12px;
}

.section-lede {
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 32px;
  line-height: 1.55;
}

p { margin: 0 0 16px; }

a { color: var(--lens); text-decoration: none; border-bottom: 1px solid var(--rule); }
a:hover { border-bottom-color: var(--lens); }

strong { font-weight: 600; }

ul, ol { margin: 0 0 16px; padding-left: 24px; }
li { margin: 0 0 6px; }

/* --- code ------------------------------------------------------------- */

code {
  font-family: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
  font-size: 14px;
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 3px;
  color: #4a4a45;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 18px 20px;
  margin: 24px 0;
  overflow-x: auto;
  line-height: 1.6;
}

pre code {
  background: none;
  padding: 0;
  font-size: 13.5px;
  color: #4a4a45;
}

/* --- figures ---------------------------------------------------------- */

.figure {
  margin: 40px 0;
  padding: 32px;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.figure svg { display: block; width: 100%; height: auto; }

.figure-caption {
  margin-top: 16px;
  font-size: 14px;
  color: var(--muted);
  text-align: center;
  font-style: italic;
  line-height: 1.5;
}

/* --- tiles ------------------------------------------------------------ */

.three-up {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin: 40px 0;
}

.three-up.two { grid-template-columns: 1fr 1fr; }

.three-up .tile {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.tile .tile-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
  color: var(--muted);
}

.tile.source .tile-label { color: var(--source); }
.tile.insight .tile-label { color: var(--insight); }
.tile.lens .tile-label { color: var(--lens); }
.tile.memory .tile-label { color: var(--memory); }

.tile h3 { margin: 0 0 8px; }
.tile p { font-size: 14px; color: var(--muted); line-height: 1.55; margin: 0; }

/* --- lists ------------------------------------------------------------ */

.checklist { list-style: none; padding: 0; margin: 32px 0; }

.checklist li {
  padding: 12px 0 12px 28px;
  position: relative;
  border-bottom: 1px solid var(--rule);
  font-size: 16px;
  margin: 0;
}

.checklist li:last-child { border-bottom: none; }

.checklist li::before {
  content: "·";
  position: absolute;
  left: 8px;
  color: var(--lens);
  font-weight: bold;
  font-size: 22px;
  line-height: 1;
  top: 16px;
}

.checklist.x li::before {
  content: "—";
  color: var(--muted);
  font-size: 14px;
  top: 18px;
}

/* --- callouts --------------------------------------------------------- */

.callout {
  margin: 24px 0;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--muted);
  border-radius: 4px;
  font-size: 15px;
  line-height: 1.6;
}

.callout :last-child { margin-bottom: 0; }

.callout .callout-tag {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 6px;
}

.callout-note { border-left-color: var(--muted); }
.callout-tip  { border-left-color: var(--lens); }
.callout-tip .callout-tag { color: var(--lens); }
.callout-warn { border-left-color: var(--insight); }
.callout-warn .callout-tag { color: var(--insight); }

/* --- pullquote -------------------------------------------------------- */

.pullquote {
  font-family: 'Charter', 'Iowan Old Style', Georgia, serif;
  font-size: 22px;
  line-height: 1.4;
  font-style: italic;
  margin: 48px 0;
  padding: 0 0 0 24px;
  border-left: 3px solid var(--lens);
}

/* --- table ------------------------------------------------------------ */

table.compact {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

table.compact th,
table.compact td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

table.compact th {
  font-weight: 600;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

table.compact code { font-size: 13px; }

hr.rule { border: none; border-top: 1px solid var(--rule); margin: 72px 0; }

/* --- table of contents (index page) ---------------------------------- */

.toc {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 40px 0;
}

.toc .toc-card {
  display: block;
  padding: 20px 22px;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.toc .toc-card:hover { border-color: var(--lens); }

.toc .toc-card .toc-title {
  font-family: 'Charter', 'Iowan Old Style', Georgia, serif;
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 4px;
}

.toc .toc-card .toc-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.group-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin: 40px 0 4px;
}

/* --- "next steps" link row ------------------------------------------- */

.next {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 40px 0 0;
}

.next a {
  flex: 1 1 200px;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.next a:hover { border-color: var(--lens); }
.next .next-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); }
.next .next-title { font-family: 'Charter', 'Iowan Old Style', Georgia, serif; font-size: 16px; color: var(--ink); }

/* --- footer ----------------------------------------------------------- */

footer.site {
  border-top: 1px solid var(--rule);
}

footer.site .bar {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

footer.site .bar p { margin: 0; }
footer.site a { color: var(--muted); border: none; }
footer.site a:hover { color: var(--ink); }

/* --- SVG label styles ------------------------------------------------- */

.svg-label { font-family: 'Inter', system-ui, sans-serif; font-size: 12px; fill: var(--ink); }
.svg-label-small { font-family: 'Inter', system-ui, sans-serif; font-size: 10px; fill: var(--muted); }
.svg-label-bold {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.svg-mono { font-family: 'JetBrains Mono', 'SF Mono', monospace; font-size: 10px; }

/* --- responsive ------------------------------------------------------- */

@media (max-width: 600px) {
  .wrap { padding: 48px 20px 72px; }
  header.site .bar { padding: 16px 20px 0; }
  nav.site { padding: 10px 20px 12px; }
  footer.site .bar { padding: 16px 20px; }
  h1 { font-size: 30px; }
  .lede { font-size: 17px; }
  .three-up, .three-up.two, .toc { grid-template-columns: 1fr; }
  section { margin-bottom: 56px; }
}