:root {
  --paper: #f2f3ee;
  --paper-deep: #e7e9e2;
  --ink: #1b2320;
  --ink-soft: #55605b;
  --stripped: #a8afa9;
  --rule: #c8cdc4;
  --marker: #f4e45a;
  --marker-band: #f9f1a3;

  --sans: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

  --measure: 62ch;
  --page: 72rem;
  --gutter: clamp(1rem, 4vw, 3rem);
  --margin-col: 9rem;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.55;
  font-variation-settings: 'wdth' 100;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p, dl, ol, pre { margin: 0; }

a { color: inherit; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }

::selection {
  background: var(--marker);
  color: var(--ink);
}

:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

code, pre {
  font-family: var(--mono);
  font-size: 0.9em;
}

p code { background: var(--paper-deep); padding: 0.05em 0.3em; }

/* Navigation */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 2rem;
  padding: 0.9rem var(--gutter);
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.85rem;
}

.brand { font-weight: 600; text-decoration: none; }
.version { font-weight: 400; color: var(--ink-soft); margin-left: 0.5rem; }

.nav-links { display: flex; flex-wrap: wrap; gap: 0.25rem 1.4rem; margin-left: auto; }
.nav-links a { text-decoration: none; color: var(--ink-soft); }
.nav-links a:hover { color: var(--ink); text-decoration: underline; }

/* Hero */
.hero {
  max-width: var(--page);
  margin: 0 auto;
  padding: clamp(3rem, 9vw, 6.5rem) var(--gutter) 2.5rem;
}

h1 {
  font-size: clamp(3rem, 9vw, 7rem);
  font-weight: 800;
  font-variation-settings: 'wdth' 75;
  line-height: 0.95;
  letter-spacing: -0.015em;
}

.lede {
  margin-top: 1.75rem;
  max-width: var(--measure);
  font-size: 1.25rem;
  line-height: 1.45;
}

.spec-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.85rem;
  margin-top: 1.5rem;
  font-family: var(--mono);
  font-size: 0.9rem;
}

.spec-line span {
  display: inline-flex;
  align-items: center;
}

.spec-line span:not(:last-child)::after {
  content: '/';
  margin-left: 0.85rem;
  color: var(--rule);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.btn {
  display: inline-block;
  padding: 0.7rem 1.2rem;
  border: 1.5px solid var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: #000; border-color: #000; }
.btn-secondary:hover { background: var(--paper-deep); }

.compat { margin-top: 1.25rem; max-width: var(--measure); color: var(--ink-soft); }

/* Demo */
.demo {
  max-width: var(--page);
  margin: 1.5rem auto 0;
  padding: 0 var(--gutter);
}

.demo-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--ink);
  border-bottom: 0;
  background: var(--paper-deep);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.demo-file { flex-basis: 100%; font-weight: 600; }
.demo-lines { font-weight: 400; color: var(--ink-soft); margin-left: 0.6rem; }

.demo-views { display: flex; flex-wrap: wrap; gap: 0.25rem; }

.demo-views [role=tab], .tabs [role=tab] {
  font: inherit;
  padding: 0.25rem 0.6rem;
  border: 1px solid transparent;
  background: none;
  color: var(--ink-soft);
  cursor: pointer;
}

.demo-views [role=tab]:hover { color: var(--ink); }
.demo-views [role=tab][aria-selected=true] { border-color: var(--ink); color: var(--ink); background: var(--paper); }

.demo-tokens { margin-left: auto; font-weight: 600; }

.demo-pane {
  border: 1px solid var(--ink);
  padding: 1rem 1rem 1rem 0;
  overflow-x: auto;
  background: var(--paper);
  font-size: 0.82rem;
  line-height: 1.55;
  tab-size: 4;
}

.demo-pane .h {
  font-weight: 600;
  background: var(--marker-band);
  padding: 0.05em 0.35em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

#pane-context, #pane-blast { padding-left: 1rem; }

.l { display: block; width: max-content; min-width: 100%; padding-right: 1rem; white-space: pre; }

.l::before {
  content: attr(data-n);
  display: inline-block;
  width: 3.5rem;
  padding-right: 1rem;
  text-align: right;
  color: var(--stripped);
  user-select: none;
}

.elide { color: var(--stripped); font-style: italic; }

.fold { display: none; font-weight: 400; color: var(--ink-soft); }
.open, .fold { font-weight: inherit; }

.body { display: grid; grid-template-rows: 1fr; transition: grid-template-rows 0.6s ease; }
.body > div { overflow: hidden; min-height: 0; }

.skeleton .body { grid-template-rows: 0fr; }
.skeleton .open { display: none; }
.skeleton .fold { display: inline; }
.skeleton .k { background: var(--marker-band); }
.skeleton .k::before { background: var(--paper); }

.demo-note { margin-top: 0.6rem; font-size: 0.85rem; color: var(--ink-soft); }

/* Sections */
main { max-width: var(--page); margin: 0 auto; padding: 0 var(--gutter); }

.section {
  display: grid;
  grid-template-columns: var(--margin-col) minmax(0, 1fr);
  gap: 0 2rem;
  padding: 3.5rem 0;
  border-top: 1px solid var(--rule);
}

.section:first-child { margin-top: 3.5rem; }

.margin-label {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink-soft);
  padding-top: 0.55rem;
}

.section-body > p { max-width: var(--measure); }

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  font-weight: 700;
  font-variation-settings: 'wdth' 88;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

h3 { font-size: 1.05rem; font-weight: 600; }

/* Ledger */
.ledger {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1px;
  margin-top: 2rem;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.ledger-col { padding: 1.25rem; background: var(--paper); }
.ledger-col.kept { background: var(--marker-band); }

.ledger pre { margin: 0.75rem 0 1rem; white-space: pre-wrap; word-break: break-word; }

.ledger dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.25rem 1.25rem;
  font-family: var(--mono);
  font-size: 0.9rem;
}

.ledger dt { color: var(--ink-soft); }
.ledger dd { margin: 0; font-weight: 600; }

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1.75rem 2.5rem;
  margin-top: 1.5rem;
}

.features dt { font-weight: 600; font-size: 1.1rem; }
.features dd { margin: 0.35rem 0 0; color: var(--ink-soft); }
.features code { color: var(--ink); }

/* Tables */
.table-wrapper { overflow-x: auto; margin-top: 1.5rem; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  border-top: 1.5px solid var(--ink);
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--rule);
}

th { font-family: var(--mono); font-weight: 600; font-size: 0.85rem; background: var(--paper-deep); }

td.kept, th.kept { background: var(--marker-band); }
th.kept { background: var(--marker); }

.tool-table td:first-child, .tool-table td:nth-child(2) { white-space: nowrap; }
.compare th:first-child { width: 24%; }

.note {
  margin-top: 2rem;
  max-width: var(--measure);
  padding-left: 1.25rem;
  border-left: 3px solid var(--marker);
}

.note p { margin-top: 0.4rem; color: var(--ink-soft); }

/* Steps */
.steps {
  list-style: none;
  padding: 0;
  margin-top: 1.5rem;
  counter-reset: step;
  border-top: 1px solid var(--rule);
}

.steps li {
  display: grid;
  grid-template-columns: 2.5rem minmax(14rem, 1fr) minmax(0, 1.2fr);
  gap: 0.5rem 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--rule);
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1;
}

.steps p { margin-top: 0.25rem; color: var(--ink-soft); }
.steps pre { padding: 0.75rem 1rem; background: var(--paper-deep); overflow-x: auto; }

/* Install */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-top: 1.75rem;
  border-bottom: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 0.9rem;
}

.tabs [role=tab] { border: 0; border-bottom: 3px solid transparent; margin-bottom: -1px; padding: 0.5rem 0.8rem; }
.tabs [role=tab]:hover { color: var(--ink); }
.tabs [role=tab][aria-selected=true] { color: var(--ink); border-bottom-color: var(--ink); }

.tab-panel { padding-top: 1.25rem; }
.panel-sub { margin: 1rem 0 0.5rem; color: var(--ink-soft); }

.code-wrapper { position: relative; }
.code-wrapper pre { padding: 1rem 5rem 1rem 1rem; background: var(--paper-deep); overflow-x: auto; }

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  font: inherit;
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}

.copy-btn:hover { background: var(--marker-band); }

/* Footer */
footer {
  max-width: var(--page);
  margin: 3rem auto 0;
  padding: 2rem var(--gutter) 3rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

footer p + p { margin-top: 0.4rem; }

@media (max-width: 800px) {
  .site-nav { position: static; }
  .spec-line { flex-direction: column; align-items: flex-start; gap: 0.25rem; }
  .spec-line span:not(:last-child)::after { display: none; }
  .section { grid-template-columns: 1fr; gap: 0.75rem; padding: 2.5rem 0; }
  .margin-label { padding-top: 0; }
  .steps li { grid-template-columns: 2.5rem 1fr; }
  .steps li pre { grid-column: 2; }
  .demo-tokens { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .body { transition: none; }
}