@font-face {
  font-family: 'JetBrains Mono';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/JetBrainsMono-Regular.woff2') format('woff2');
}
@font-face {
  font-family: 'JetBrains Mono';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/JetBrainsMono-Medium.woff2') format('woff2');
}
@font-face {
  font-family: 'JetBrains Mono';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/JetBrainsMono-SemiBold.woff2') format('woff2');
}
@font-face {
  font-family: 'JetBrains Mono';
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/JetBrainsMono-Bold.woff2') format('woff2');
}

/* Chrona classicPalette (lib/theme/chrona_colors.dart), ported to CSS. */
:root {
  --ink: #EDEBE6;
  --ink-dim: #B9BCC0;
  --muted: #8B8F94;
  --hairline: rgba(255,255,255,.09);
  --hairline-strong: rgba(255,255,255,.16);
  --screen: #000000;
  --surface: #08090A;
  --card: #101315;
  --card-raised-1: #1A1E22;
  --card-raised-2: #0F1214;
  --field: #14171A;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { background: var(--screen); }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

a { color: var(--ink); text-decoration-color: var(--hairline-strong); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--ink); }

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

header.top {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 40px;
}

header.top a.back {
  display: flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
}

header.top img {
  width: 44px;
  height: 44px;
  border-radius: 9.5px;
  border: 1px solid var(--hairline);
  display: block;
}

header.top .name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.28px;
  color: var(--ink);
}

header.top .tagline {
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 2px;
}

.lang-switch {
  margin-left: auto;
  font-size: 11px;
  letter-spacing: 0.5px;
  color: var(--muted);
  white-space: nowrap;
}
.lang-switch a { color: var(--muted); text-decoration: none; }
.lang-switch a.current { color: var(--ink); pointer-events: none; }
.lang-switch a:hover:not(.current) { color: var(--ink); text-decoration: underline; }

h1 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin: 0 0 8px;
}

.meta {
  font-size: 9.5px;
  letter-spacing: 2.28px;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 36px;
}

.lede {
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.toc {
  border: 1px solid var(--hairline);
  border-radius: 9.5px;
  background: var(--card);
  padding: 16px 20px;
  margin-bottom: 40px;
}

.toc .label {
  font-size: 9.5px;
  letter-spacing: 2.28px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}

.toc ol {
  margin: 0;
  padding: 0 0 0 1.1em;
  columns: 2;
  -webkit-columns: 2;
  column-gap: 24px;
}

.toc li { font-size: 12.5px; margin-bottom: 6px; break-inside: avoid; }
.toc a { color: var(--ink-dim); text-decoration: none; }
.toc a:hover { color: var(--ink); text-decoration: underline; }

section {
  border: 1px solid var(--hairline);
  border-radius: 9.5px;
  background: var(--card);
  padding: 24px 24px 26px;
  margin-bottom: 20px;
  scroll-margin-top: 20px;
}

section h2 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin: 0 0 14px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

section h2 .num {
  font-size: 11px;
  color: var(--muted);
  font-weight: 400;
}

section h3 {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: -0.2px;
  color: var(--ink);
  margin: 20px 0 8px;
}

section h3:first-of-type { margin-top: 4px; }

section p { margin: 0 0 12px; color: var(--ink-dim); font-size: 13.5px; }
section p:last-child { margin-bottom: 0; }

section ul, section ol.plain {
  margin: 0 0 12px;
  padding-left: 1.3em;
  color: var(--ink-dim);
  font-size: 13.5px;
}
section li { margin-bottom: 6px; }
section li:last-child { margin-bottom: 0; }

section strong { color: var(--ink); font-weight: 600; }

code, .code {
  font-family: inherit;
  background: var(--field);
  border: 1px solid var(--hairline);
  border-radius: 4.5px;
  padding: 1px 6px;
  font-size: 12.5px;
  color: var(--ink);
}

.callout {
  border: 1px solid var(--hairline-strong);
  border-radius: 7px;
  background: var(--field);
  padding: 12px 14px;
  font-size: 12.5px;
  color: var(--ink-dim);
  margin: 12px 0;
}
.callout strong { display: block; color: var(--ink); font-size: 11.5px; letter-spacing: 0.3px; margin-bottom: 4px; }

.grid-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  margin: 4px 0 14px;
}
.grid-table th, .grid-table td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}
.grid-table th {
  color: var(--muted);
  font-size: 9.5px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 400;
}
.grid-table td { color: var(--ink-dim); }
.grid-table td.ink { color: var(--ink); }
.grid-table tr:last-child td { border-bottom: none; }

.pill {
  display: inline-block;
  font-size: 9.5px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 999px;
  border: 1px solid var(--hairline-strong);
  color: var(--ink-dim);
}
.pill.no { color: var(--ink-dim); }

.btn {
  display: inline-block;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.96px;
  text-transform: uppercase;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 4.5px;
  margin: 4px 0 2px;
}
.btn.primary { background: var(--ink); color: var(--screen); }
.btn.primary:hover { background: var(--ink-dim); }
.btn.ghost { border: 1px solid var(--hairline-strong); color: var(--ink); }
.btn.ghost:hover { border-color: var(--ink-dim); }

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  font-size: 11.5px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

footer a { color: var(--muted); }

@media (max-width: 480px) {
  .wrap { padding: 32px 16px 56px; }
  h1 { font-size: 22px; }
  .toc ol { columns: 1; }
  section { padding: 20px 18px 22px; }
}