/* Yale Thomas design language: warm near-black, hairline structure, one
   restrained red used as a mark. Dark only, so the page and the unlock screen
   it links to read as one surface. */

@font-face {
  font-family: Geist;
  src: url(fonts/Geist-Regular.woff2) format('woff2');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: Geist;
  src: url(fonts/Geist-Medium.woff2) format('woff2');
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: 'Geist Mono';
  src: url(fonts/GeistMono-Regular.woff2) format('woff2');
  font-weight: 400;
  font-display: swap;
}

:root {
  --bg: #0e0e0d;
  --ink: #e8e3d5;
  --muted: #8a857a;
  --rule: #2a2926;
  --rule-strong: #403e39;
  --accent: #c1432e;
  /* #c1432e is 3.8:1 on the background: enough for a rule, not for a sentence.
     Text that has to be read uses the lighter tint. */
  --accent-ink: #e2705c;
  --sans: Geist, ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  background: var(--bg);
  color: var(--ink);
  color-scheme: dark;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  font-feature-settings: 'kern' 1;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 58rem;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 5rem;
}

/* Masthead ---------------------------------------------------------------- */

.masthead { padding-bottom: 1.4rem; border-bottom: 1px solid var(--rule-strong); }

.publisher-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.publisher-brand {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  font-family: var(--mono);
  font-size: max(.78rem, 12px);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.25;
  color: var(--ink);
  border-bottom-color: transparent;
  padding-bottom: 0;
}
.publisher-brand-period { color: var(--accent); }
.publisher-brand:hover { color: var(--ink); border-bottom-color: var(--rule-strong); }
.publisher-brand:focus-visible { outline-width: 2px; }

.publisher-git {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  font-family: var(--mono);
  font-size: max(.78rem, 12px);
  line-height: 1.25;
  color: var(--muted);
}

h1 {
  margin-top: 1.6rem;
  font-size: 1.85rem;
  font-weight: 500;
  letter-spacing: -.015em;
  line-height: 1.25;
  max-width: 30ch;
  text-wrap: balance;
}

.lede {
  margin-top: .9rem;
  max-width: 60ch;
  color: var(--ink);
}

.scope-note {
  margin-top: 1.1rem;
  padding-left: .9rem;
  border-left: 2px solid var(--accent);
  max-width: 60ch;
  color: var(--muted);
  font-size: .92rem;
}

/* Sections ---------------------------------------------------------------- */

section {
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 0 2rem;
  padding: 2.2rem 0;
  border-bottom: 1px solid var(--rule);
}
section:last-of-type { border-bottom: none; }

section > h2 {
  font-family: var(--mono);
  font-size: .74rem;
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: .25rem;
}

/* min-width:0 so a wide table or code block scrolls inside .scroll-x/pre
   instead of stretching the grid column and the page with it. */
.body { max-width: 62ch; min-width: 0; }
.body > * + * { margin-top: .85rem; }

p { max-width: 62ch; }

.muted { color: var(--muted); }

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
  transition: border-color .12s, color .12s;
}
a:hover { color: var(--accent-ink); }
a:focus-visible { outline: 1px solid var(--accent); outline-offset: 3px; border-radius: 1px; }

code, kbd { font-family: var(--mono); font-size: .88em; }

/* Lists: hairline rows rather than bullets --------------------------------- */

ul.rows { list-style: none; }
ul.rows > li {
  padding: .55rem 0;
  border-top: 1px solid var(--rule);
  max-width: 66ch;
}
ul.rows > li:first-child { border-top: none; padding-top: 0; }
ul.rows > li > b { font-weight: 500; }

ol.steps { list-style: none; counter-reset: step; }
ol.steps > li {
  position: relative;
  padding: .5rem 0 .5rem 2.1rem;
  border-top: 1px solid var(--rule);
  max-width: 66ch;
  counter-increment: step;
}
ol.steps > li:first-child { border-top: none; }
ol.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: .5rem;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--accent-ink);
}

/* Tables ------------------------------------------------------------------ */

/* Below its min-width the table scrolls inside .scroll-x rather than wrapping
   every cell into an unreadable column. */
.table { width: 100%; min-width: 30rem; border-collapse: collapse; font-size: .88rem; }
.table th, .table td {
  text-align: left;
  padding: .5rem .9rem .5rem 0;
  border-top: 1px solid var(--rule);
  vertical-align: top;
}
.table thead th {
  border-top: none;
  border-bottom: 1px solid var(--rule-strong);
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: .45rem;
}
.table td.m, .table th.m { font-family: var(--mono); font-size: .82rem; }
.table td.locked { color: var(--muted); }
.scroll-x { overflow-x: auto; }

/* Key/value metadata ------------------------------------------------------ */

.kv {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: .3rem 1.4rem;
  font-family: var(--mono);
  font-size: .82rem;
}
.kv dt { color: var(--muted); }
.kv dd { overflow-wrap: anywhere; }

/* Code -------------------------------------------------------------------- */

pre {
  font-family: var(--mono);
  font-size: .8rem;
  line-height: 1.7;
  color: var(--ink);
  padding: .9rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow-x: auto;
}
pre .c { color: var(--muted); }

/* Footer ------------------------------------------------------------------ */

footer {
  margin-top: 2.6rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule-strong);
  font-family: var(--mono);
  font-size: .76rem;
  color: var(--muted);
  display: flex;
  gap: 1.6rem;
  flex-wrap: wrap;
}

/* Narrow ------------------------------------------------------------------ */

@media (max-width: 46rem) {
  .page { padding: 2.5rem 1.1rem 3.5rem; }
  h1 { font-size: 1.5rem; }
  section { grid-template-columns: 1fr; gap: .9rem; padding: 1.8rem 0; }
  section > h2 { padding-top: 0; }
}