@font-face {
  font-family: "Fraunces";
  src: url("vendor/fraunces.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --paper: #fbf7f2;
  --surface: #f3ece3;
  --ink: #1f1b17;
  --muted: #6b635b;
  --line: #e4d9cc;
  --accent: #b5472a;
  --accent-ink: #8e3820;
  --accent-wash: #f6e4dc;
  --serif: "Fraunces", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #171412;
    --surface: #221d1a;
    --ink: #ede6dd;
    --muted: #a79e94;
    --line: #3a332d;
    --accent: #e07a5a;
    --accent-ink: #f0a184;
    --accent-wash: #3a231b;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #171412;
  --surface: #221d1a;
  --ink: #ede6dd;
  --muted: #a79e94;
  --line: #3a332d;
  --accent: #e07a5a;
  --accent-ink: #f0a184;
  --accent-wash: #3a231b;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}
html {
  scroll-padding-top: 5rem;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px / 1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--accent-ink);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}
a:hover {
  color: var(--accent);
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}
.skip {
  position: absolute;
  left: -999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  background: var(--paper);
  padding: 0.5rem 0.75rem;
}

/* Header */
.bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.75rem clamp(1rem, 4vw, 2.5rem);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--serif);
  font-size: 1.05rem;
  white-space: nowrap;
}
.brand .mark {
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.nav {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
}
.nav a {
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  white-space: nowrap;
}
.nav a:hover {
  color: var(--ink);
  background: var(--surface);
}
.nav a[aria-current="page"] {
  color: var(--accent-ink);
  background: var(--accent-wash);
}
.actions {
  display: flex;
  gap: 0.25rem;
}
.icon {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--muted);
  cursor: pointer;
}
.icon:hover {
  color: var(--ink);
  background: var(--surface);
}

/* Home hero */
/* The hero spans the same columns as the document below it. */
.hero {
  width: min(46rem, 100% - 2 * clamp(1rem, 4vw, 2.5rem));
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 6rem) 0 1rem;
}
@media (min-width: 1100px) {
  .hero {
    width: min(64rem, 100% - 2 * clamp(1rem, 4vw, 2.5rem));
  }
}
.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 0;
  max-width: 18ch;
  font: 600 clamp(2.2rem, 5.5vw, 3.9rem) / 1.05 var(--serif);
  letter-spacing: -0.025em;
  font-variation-settings:
    "SOFT" 50,
    "opsz" 144;
}
.lede {
  max-width: 52ch;
  margin: 1.25rem 0 2rem;
  color: var(--muted);
  font-size: 1.15rem;
}
.install {
  display: inline-block;
  margin: 0 0 2rem;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--accent);
}
.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.facts li {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}
.facts strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
}

/* Document layout */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 46rem);
  justify-content: center;
  gap: 4rem;
  padding: 2rem clamp(1rem, 4vw, 2.5rem) 4rem;
}
@media (min-width: 1100px) {
  .layout {
    grid-template-columns: minmax(0, 46rem) 14rem;
  }
}
main:focus {
  outline: none;
}
.toc {
  display: none;
}
@media (min-width: 1100px) {
  .toc {
    display: block;
    position: sticky;
    top: 5rem;
    align-self: start;
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    font-size: 0.85rem;
  }
}
.toc nav {
  display: grid;
  gap: 0.15rem;
  border-left: 1px solid var(--line);
}
.toc a {
  padding: 0.2rem 0 0.2rem 0.9rem;
  margin-left: -1px;
  border-left: 1px solid transparent;
  color: var(--muted);
  text-decoration: none;
}
.toc a.sub {
  padding-left: 1.7rem;
  font-size: 0.8rem;
}
.toc a:hover,
.toc a.here {
  color: var(--accent-ink);
  border-left-color: var(--accent);
}

/* Prose */
.prose h1,
.prose h2,
.prose h3 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
}
.prose h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(2rem, 4vw, 2.8rem);
}
.prose h2 {
  margin: 3rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 1.65rem;
}
.prose h3 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
}
.prose > :first-child,
.prose > h2:first-of-type {
  margin-top: 0;
}
.prose li + li {
  margin-top: 0.3rem;
}
code {
  font: 0.88em var(--mono);
  padding: 0.12em 0.35em;
  border-radius: 5px;
  background: var(--surface);
}
pre {
  overflow-x: auto;
  padding: 1rem 1.15rem;
  border-radius: 10px;
  background: var(--surface);
  font-size: 0.88rem;
  line-height: 1.55;
}
pre code {
  padding: 0;
  background: none;
  font-size: inherit;
}
.table-wrap,
.prose table {
  display: block;
  overflow-x: auto;
}
.prose table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.prose th,
.prose td {
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.prose th {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.prose blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 1.25rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}
.mermaid {
  margin: 1.75rem 0;
  padding: 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-align: center;
}
.mermaid {
  position: relative;
  cursor: zoom-in;
}
.mermaid svg {
  max-width: 100%;
  height: auto;
}
.zoom-open {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--muted);
  font-size: 1rem;
  cursor: zoom-in;
}
.zoom-open:hover {
  color: var(--accent-ink);
  border-color: var(--accent);
}

/* The full-size diagram */
#zoom {
  position: fixed;
  inset: 0;
  width: 100dvw;
  height: 100dvh;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: var(--paper);
  color: var(--ink);
}
/* The page behind does not scroll while a diagram fills the window. */
html:has(#zoom[open]) {
  overflow: hidden;
}
#zoom::backdrop {
  background: color-mix(in srgb, var(--ink) 40%, transparent);
}
.zoom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--line);
}
.zoom-bar h2 {
  margin: 0;
  font: 600 1.1rem var(--serif);
}
.zoom-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.zoom-actions button {
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 0.6rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}
.zoom-actions button:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}
.zoom-actions output {
  min-width: 3.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}
#zoom-canvas {
  position: relative;
  height: calc(100dvh - 3.6rem);
  overflow: hidden;
  cursor: grab;
  touch-action: none;
}
#zoom-canvas:active {
  cursor: grabbing;
}
#zoom-canvas svg {
  position: absolute;
  top: 0;
  left: 0;
  max-width: none;
  transform-origin: 0 0;
}

.edit {
  margin-top: 3rem;
  font-size: 0.88rem;
}
.foot {
  padding: 2rem clamp(1rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}
.foot a {
  color: inherit;
}

/* Node colours come from the theme in site.js; these are the lines and labels between them. */
:is(.mermaid, #zoom-canvas) .node :is(rect, path, polygon, circle, ellipse) {
  stroke-width: 1.5px !important;
}
:is(.mermaid, #zoom-canvas) .cluster rect {
  fill: none !important;
  stroke: var(--muted) !important;
  stroke-dasharray: 5 4;
}
:is(.mermaid, #zoom-canvas) .edgeLabel,
:is(.mermaid, #zoom-canvas) .edgeLabel p {
  background: var(--paper) !important;
  color: var(--muted) !important;
  font-size: 12px;
}
:is(.mermaid, #zoom-canvas) small {
  opacity: 0.8;
}