/* Basalt publish site — original design.
   Palette takes its cue from the rock: cooled basalt greys, with a warm
   ember accent for the one thing on a page that is interactive. */

:root {
  --bg: #fbfaf9;
  --bg-sunk: #f2f0ee;
  --surface: #ffffff;
  --border: #e3dfdb;
  --border-strong: #cfc9c3;
  --ink: #1c1a19;
  --ink-soft: #55504c;
  --ink-faint: #8b847e;
  --ember: #b4530f;
  --ember-soft: #f3e4d8;
  --locked: #8a6d3b;
  --locked-soft: #f6eedc;
  --dead: #a89f98;
  --radius: 7px;
  --sidebar: 288px;
  --toc: 208px;
  --measure: 46rem;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16161a;
    --bg-sunk: #101013;
    --surface: #1d1d22;
    --border: #2c2c33;
    --border-strong: #3d3d46;
    --ink: #e8e6e3;
    --ink-soft: #a9a5a0;
    --ink-faint: #76726d;
    --ember: #e8894a;
    --ember-soft: #33231a;
    --locked: #c9a460;
    --locked-soft: #2b2419;
    --dead: #5d5953;
  }
}
:root[data-theme="dark"] {
  --bg: #16161a;
  --bg-sunk: #101013;
  --surface: #1d1d22;
  --border: #2c2c33;
  --border-strong: #3d3d46;
  --ink: #e8e6e3;
  --ink-soft: #a9a5a0;
  --ink-faint: #76726d;
  --ember: #e8894a;
  --ember-soft: #33231a;
  --locked: #c9a460;
  --locked-soft: #2b2419;
  --dead: #5d5953;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ember); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

/* ---------------------------------------------------------------- layout */

.shell {
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  background: var(--bg-sunk);
  border-right: 1px solid var(--border);
  padding: 20px 0 48px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.main { min-width: 0; display: flex; justify-content: center; }

.main-inner {
  display: grid;
  grid-template-columns: minmax(0, var(--measure)) var(--toc);
  gap: 48px;
  padding: 40px 40px 120px;
  width: 100%;
  max-width: calc(var(--measure) + var(--toc) + 128px);
}

.article { min-width: 0; }

/* ---------------------------------------------------------------- brand */

.brand { padding: 0 20px 16px; }
.brand-name {
  display: flex; align-items: center; gap: 9px;
  font-weight: 650; font-size: 15px; letter-spacing: -0.01em;
  color: var(--ink); text-decoration: none;
}
.brand-name:hover { text-decoration: none; }
.brand-mark { flex: none; color: var(--ember); }
.brand-sub {
  margin: 3px 0 0 29px; font-size: 11.5px; color: var(--ink-faint);
  text-transform: uppercase; letter-spacing: 0.07em;
}

/* ---------------------------------------------------------------- search */

.search { padding: 0 20px 18px; }
.search-input {
  width: 100%; padding: 7px 11px;
  font: inherit; font-size: 13.5px;
  color: var(--ink); background: var(--surface);
  border: 1px solid var(--border-strong); border-radius: var(--radius);
}
.search-input:focus {
  outline: 2px solid var(--ember); outline-offset: -1px; border-color: var(--ember);
}
.search-input::placeholder { color: var(--ink-faint); }

.search-results { margin-top: 8px; display: none; }
.search-results.open { display: block; }
.search-hit {
  display: block; padding: 6px 9px; border-radius: 5px;
  font-size: 13px; color: var(--ink); text-decoration: none;
}
.search-hit:hover { background: var(--ember-soft); text-decoration: none; }
.search-hit-path { display: block; font-size: 11px; color: var(--ink-faint); }
.search-empty { padding: 6px 9px; font-size: 12.5px; color: var(--ink-faint); }

/* ---------------------------------------------------------------- nav tree */

.nav { padding: 0 12px; }
.nav-group > summary {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 8px; border-radius: 5px; cursor: pointer;
  font-size: 13px; font-weight: 600; color: var(--ink-soft);
  list-style: none;
}
.nav-group > summary::-webkit-details-marker { display: none; }
.nav-group > summary:hover { background: var(--surface); color: var(--ink); }
.nav-caret { flex: none; transition: transform 120ms ease; color: var(--ink-faint); }
.nav-group[open] > summary .nav-caret { transform: rotate(90deg); }
.nav-children { margin-left: 10px; padding-left: 8px; border-left: 1px solid var(--border); }

.nav-item {
  display: block; padding: 4px 8px; border-radius: 5px;
  font-size: 13px; color: var(--ink-soft); text-decoration: none;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.nav-item:hover { background: var(--surface); color: var(--ink); text-decoration: none; }
.nav-item[aria-current="page"] {
  background: var(--ember-soft); color: var(--ember); font-weight: 600;
}

/* ---------------------------------------------------------------- article */

.crumbs {
  font-size: 12.5px; color: var(--ink-faint); margin-bottom: 10px;
  display: flex; flex-wrap: wrap; gap: 5px; align-items: center;
}
.crumbs a { color: var(--ink-faint); text-decoration: none; }
.crumbs a:hover { color: var(--ember); text-decoration: underline; }

.title {
  font-family: var(--serif);
  font-size: 2.3rem; line-height: 1.15; letter-spacing: -0.02em;
  margin: 0 0 6px; font-weight: 600;
}

.meta {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  font-size: 12.5px; color: var(--ink-faint);
  padding-bottom: 20px; margin-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.tag {
  display: inline-block; padding: 1px 8px; border-radius: 999px;
  background: var(--bg-sunk); border: 1px solid var(--border);
  font-size: 11.5px; color: var(--ink-soft); text-decoration: none;
}
.tag:hover { border-color: var(--ember); color: var(--ember); text-decoration: none; }

/* prose */

.prose { font-size: 16.5px; }
.prose > *:first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--serif); letter-spacing: -0.01em;
  margin: 2em 0 0.5em; line-height: 1.25; position: relative;
}
.prose h1 { font-size: 1.7rem; }
.prose h2 { font-size: 1.4rem; }
.prose h3 { font-size: 1.17rem; }
.prose h4 { font-size: 1.03rem; font-family: var(--sans); font-weight: 650; }
.prose p { margin: 0 0 1.05em; }
.prose ul, .prose ol { margin: 0 0 1.05em; padding-left: 1.4em; }
.prose li { margin-bottom: 0.3em; }
.prose li > ul, .prose li > ol { margin: 0.3em 0 0; }

.prose blockquote {
  margin: 0 0 1.05em; padding: 2px 0 2px 16px;
  border-left: 3px solid var(--border-strong);
  color: var(--ink-soft);
}

.prose code {
  font-family: var(--mono); font-size: 0.875em;
  background: var(--bg-sunk); border: 1px solid var(--border);
  padding: 1px 4px; border-radius: 4px;
}
.prose pre {
  margin: 0 0 1.05em; padding: 14px 16px; overflow-x: auto;
  background: var(--bg-sunk); border: 1px solid var(--border);
  border-radius: var(--radius); line-height: 1.5;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: 13.5px; }

.prose table {
  width: 100%; border-collapse: collapse; margin: 0 0 1.05em; font-size: 14.5px;
}
.prose th, .prose td {
  border: 1px solid var(--border); padding: 7px 10px; text-align: left;
}
.prose th { background: var(--bg-sunk); font-weight: 650; }

.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2em 0; }

.prose a.anchor {
  position: absolute; left: -0.85em; width: 0.85em;
  color: var(--ink-faint); text-decoration: none; opacity: 0;
  font-weight: 400; font-family: var(--sans);
}
.prose h1:hover .anchor, .prose h2:hover .anchor,
.prose h3:hover .anchor, .prose h4:hover .anchor { opacity: 1; }

img.asset { max-width: 100%; height: auto; border-radius: var(--radius); display: block; }
.embed-figure { margin: 0 0 1.05em; }
.embed-figure figcaption {
  margin-top: 6px; font-size: 12.5px; color: var(--ink-faint); text-align: center;
}

.transclusion {
  border-left: 3px solid var(--ember) !important;
  background: var(--bg-sunk); border-radius: 0 var(--radius) var(--radius) 0;
  padding: 12px 16px !important; margin-bottom: 1.05em;
}
.transclusion-src {
  display: block; font-size: 11.5px; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--ink-faint); margin-bottom: 6px;
  text-decoration: none;
}

/* link states — the three outcomes §9 defines */

.lk-note { text-decoration-color: var(--ember); }
.lk-ext::after {
  content: "↗"; font-size: 0.75em; margin-left: 1px;
  vertical-align: baseline; opacity: 0.7;
}
.lk-dead {
  color: var(--dead); border-bottom: 1px dashed var(--dead);
  cursor: not-allowed;
}
.lk-locked {
  color: var(--locked); background: var(--locked-soft);
  padding: 0 5px; border-radius: 4px; cursor: not-allowed;
  font-size: 0.95em;
}
.lk-locked::before { content: "🔒 "; font-size: 0.85em; }
.lk-anchor-missing { text-decoration-style: dotted; }

/* ---------------------------------------------------------------- toc */

.toc { position: sticky; top: 40px; align-self: start; font-size: 13px; }
.toc-head {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-faint); margin-bottom: 8px; font-weight: 650;
}
.toc a {
  display: block; padding: 3px 0 3px 10px;
  border-left: 2px solid var(--border);
  color: var(--ink-soft); text-decoration: none;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.toc a:hover { color: var(--ember); border-left-color: var(--ember); text-decoration: none; }
.toc a.lvl-3 { padding-left: 22px; }
.toc a.active { color: var(--ember); border-left-color: var(--ember); font-weight: 600; }

/* ---------------------------------------------------------------- panels */

.panels { margin-top: 56px; display: grid; gap: 28px; }

.panel {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); padding: 16px 18px;
}
.panel-head {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-faint); font-weight: 650; margin-bottom: 10px;
  display: flex; align-items: center; gap: 7px;
}
.panel-count {
  background: var(--bg-sunk); border: 1px solid var(--border);
  border-radius: 999px; padding: 0 6px; font-size: 10.5px; letter-spacing: 0;
}

.backlink { display: block; padding: 7px 0; border-top: 1px solid var(--border); }
.backlink:first-of-type { border-top: 0; padding-top: 0; }
.backlink-title { font-size: 14.5px; color: var(--ember); text-decoration: none; font-weight: 550; }
.backlink-title:hover { text-decoration: underline; }
.backlink-path { display: block; font-size: 11.5px; color: var(--ink-faint); margin-top: 1px; }
.backlink-locked { color: var(--locked); font-size: 14px; }
.backlink-locked::before { content: "🔒 "; }

.panel-empty { font-size: 13.5px; color: var(--ink-faint); font-style: italic; }

/* graph */

.graph { display: block; width: 100%; height: auto; }
.graph-edge { stroke: var(--border-strong); stroke-width: 1.2; }
.graph-edge.redacted { stroke-dasharray: 3 3; stroke: var(--locked); }
.graph-node { fill: var(--surface); stroke: var(--border-strong); stroke-width: 1.5; }
.graph-node.center { fill: var(--ember); stroke: var(--ember); }
.graph-node.locked { fill: var(--locked-soft); stroke: var(--locked); }
.graph-label { font-size: 10px; fill: var(--ink-soft); font-family: var(--sans); }
.graph-hit { cursor: pointer; }
.graph-hit:hover .graph-node { stroke: var(--ember); stroke-width: 2.5; }

/* ---------------------------------------------------------------- notices */

.notice {
  border: 1px solid var(--border-strong); border-left: 3px solid var(--locked);
  background: var(--locked-soft); color: var(--ink);
  padding: 12px 16px; border-radius: var(--radius); margin-bottom: 24px;
  font-size: 14px;
}

.error-page { padding: 80px 0; max-width: var(--measure); }
.error-code {
  font-family: var(--mono); font-size: 13px; color: var(--ink-faint);
  letter-spacing: 0.08em;
}
.error-title { font-family: var(--serif); font-size: 2rem; margin: 6px 0 12px; }
.error-body { color: var(--ink-soft); }

/* ---------------------------------------------------------------- chrome */

.topbar {
  display: none;
  position: sticky; top: 0; z-index: 20;
  padding: 10px 16px; gap: 12px; align-items: center;
  background: var(--bg); border-bottom: 1px solid var(--border);
}
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; padding: 0;
  background: var(--surface); color: var(--ink-soft);
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  cursor: pointer;
}
.icon-btn:hover { color: var(--ember); border-color: var(--ember); }

.theme-toggle { position: fixed; right: 16px; bottom: 16px; z-index: 30; }

.footer {
  margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--border);
  font-size: 12px; color: var(--ink-faint);
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between;
}
.footer code { font-family: var(--mono); font-size: 11px; }

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

@media (max-width: 1100px) {
  .main-inner { grid-template-columns: minmax(0, 1fr); }
  .toc { display: none; }
}

@media (max-width: 820px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .topbar { display: flex; }
  .sidebar {
    position: fixed; inset: 0 auto 0 0; z-index: 40;
    width: min(86vw, var(--sidebar));
    transform: translateX(-100%); transition: transform 180ms ease;
    box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0);
  }
  .sidebar.open { transform: translateX(0); box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0.4); }
  .main-inner { padding: 24px 16px 96px; }
  .title { font-size: 1.85rem; }
  .theme-toggle { bottom: 12px; right: 12px; }
}

@media print {
  .sidebar, .toc, .topbar, .theme-toggle, .panels { display: none; }
  .shell { grid-template-columns: 1fr; }
}