:root {
  --paper: #f6f4ef;
  --ink: #1b1b1a;
  --muted: #6b6a66;
  --rule: #d9d5cc;
  --accent: #b4441f;
  --code-bg: #ebe8e0;

  --serif: "Source Serif 4", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;

  --measure: 46rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #141413;
    --ink: #e6e3dc;
    --muted: #8f8c85;
    --rule: #2e2d2a;
    --accent: #e0754d;
    --code-bg: #22211f;
  }
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--serif);
  font-optical-sizing: auto;
}

a {
  color: inherit;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { color: var(--accent); }

code {
  font: 0.85em var(--mono);
  background: var(--code-bg);
  padding: 0.05em 0.3em;
  border-radius: 2px;
}

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 1rem;
}

.masthead {
  border-bottom: 1px solid var(--rule);
  padding: 4.5rem 0 2.5rem;
}

.doc-id {
  font: 0.75rem var(--mono);
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 1.5rem;
}

h1 {
  font-size: 2.6rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}

.lede {
  font-size: 1.2rem;
  line-height: 1.5;
  max-width: 36rem;
  margin: 0 0 1.5rem;
}

.links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font: 0.875rem var(--mono);
}

.toc ol {
  margin: 0;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule);
  list-style: none;
  counter-reset: toc;
  columns: 2;
  column-gap: 2rem;
  font: 0.8125rem/1.9 var(--mono);
}
.toc li { counter-increment: toc; }
.toc li::before {
  content: counter(toc, decimal-leading-zero) "  ";
  white-space: pre;
  color: var(--muted);
}
.toc a { text-decoration: none; }

section { padding: 3.5rem 0 1rem; }

h2 {
  font: 500 0.8125rem var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 2rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--ink);
}
h2 .num {
  color: var(--accent);
  margin-right: 1rem;
}

.section-note {
  color: var(--muted);
  margin: -0.75rem 0 1.5rem;
}

.project {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 12.5rem;
  gap: 2rem;
  padding: 0 0 2.5rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--rule);
}
.project:last-child { border-bottom: 0; margin-bottom: 0; }

h3 {
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 0.25rem;
}

.kind {
  font: 0.75rem var(--mono);
  color: var(--muted);
  margin: 0 0 1rem;
}

.project-body p { margin: 0 0 0.9rem; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  font: 0.8125rem var(--mono);
  margin-top: 1.25rem !important;
}
.actions a::after { content: " \2197"; color: var(--muted); }

.spec {
  margin: 0.4rem 0 0;
  font: 0.75rem/1.45 var(--mono);
  border-top: 1px solid var(--rule);
}
.spec dt {
  color: var(--muted);
  padding-top: 0.6rem;
}
.spec dd {
  margin: 0;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
}

.table-scroll { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}
th {
  font: 500 0.6875rem var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-align: left;
  padding: 0 0.75rem 0.5rem 0;
  border-bottom: 1px solid var(--ink);
}
td {
  padding: 0.55rem 0.75rem 0.55rem 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
td:first-child {
  font: 0.8125rem var(--mono);
  white-space: nowrap;
}
td:nth-child(3) {
  font: 0.75rem var(--mono);
  color: var(--muted);
  white-space: nowrap;
}

.entries {
  list-style: none;
  margin: 0;
  padding: 0;
}
.entries li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--rule);
}
.entries li > a:first-child,
.entries li > a { font: 0.875rem var(--mono); }
.entries li > span {
  display: block;
  color: var(--muted);
  margin-top: 0.15rem;
}
.entries li > span a { font: inherit; }

footer {
  padding-top: 3rem;
  padding-bottom: 3rem;
  font: 0.75rem var(--mono);
  color: var(--muted);
}

@media (max-width: 640px) {
  .masthead { padding-top: 3rem; }
  h1 { font-size: 2.1rem; }
  .lede { font-size: 1.1rem; }
  .toc ol { columns: 1; }
  .project {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .spec {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 1rem;
  }
  .spec dt, .spec dd {
    padding: 0.45rem 0;
    border-bottom: 1px solid var(--rule);
  }
}