:root {
  --paper: #f4f1ec;
  --ink: #1a1a18;
  --muted: #5c5a56;
  --rule: #d4cfc6;
  --accent: #2a4a6b;
  --accent-bg: #e8eef4;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --serif: 'Literata', Georgia, serif;
}

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

body {
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.65;
}

@media (max-width: 800px) {
  body { grid-template-columns: 1fr; }
  .toc {
    position: static !important;
    border-bottom: 1px solid var(--rule);
    padding: 1rem 1.5rem !important;
  }
  .toc nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; }
  .toc .meta { display: none; }
}

.toc {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 2rem 1.25rem;
  border-right: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.back {
  display: block;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 1.5rem;
}

.back:hover { color: var(--accent); }

.toc nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.toc nav a {
  color: var(--ink);
  text-decoration: none;
}

.toc nav a:hover { color: var(--accent); }

.meta {
  margin-top: 2rem;
  color: var(--muted);
  line-height: 1.5;
}

.rfc {
  max-width: 42rem;
  padding: 3rem 2.5rem 5rem;
}

@media (max-width: 600px) {
  .rfc { padding: 2rem 1.25rem 4rem; }
}

.rfc-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--ink);
}

.category {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.rfc-header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 1.25rem;
}

.rfc-meta {
  width: 100%;
  font-size: 0.85rem;
  border-collapse: collapse;
}

.rfc-meta th {
  text-align: left;
  font-family: var(--mono);
  font-weight: 500;
  color: var(--muted);
  padding: 0.25rem 1rem 0.25rem 0;
  width: 5rem;
}

.badge {
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  background: #d4edda;
  color: #1e5631;
  letter-spacing: 0.04em;
}

.badge.muted {
  background: var(--rule);
  color: var(--muted);
}

section {
  margin-bottom: 2.5rem;
  scroll-margin-top: 2rem;
}

section h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.sec-num { font-family: var(--mono); font-weight: 500; color: var(--muted); }

section p { margin-bottom: 0.75rem; color: var(--ink); }

.code-block {
  background: var(--accent-bg);
  border: 1px solid var(--rule);
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--accent);
}

.endpoint {
  border: 1px solid var(--rule);
  margin: 1.25rem 0;
  background: #fff;
}

.endpoint-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--accent-bg);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.method {
  font-weight: 600;
  color: #1e5631;
  background: #d4edda;
  padding: 0.15rem 0.4rem;
  font-size: 0.7rem;
}

.path { color: var(--accent); font-weight: 500; }

.ext { margin-left: auto; font-size: 0.75rem; }
.ext a { color: var(--muted); }

.endpoint > p,
.endpoint > ul {
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
}

.endpoint ul {
  padding-top: 0;
  padding-left: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

.spec-table th,
.spec-table td {
  border: 1px solid var(--rule);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.spec-table th {
  font-family: var(--mono);
  font-size: 0.75rem;
  background: var(--accent-bg);
  font-weight: 500;
}

.spec-table code {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.spec-table a { color: var(--accent); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.25rem 0;
}

@media (max-width: 500px) {
  .contact-grid { grid-template-columns: 1fr; }
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem;
  border: 2px solid var(--ink);
  text-decoration: none;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.85rem;
  transition: background 0.15s;
}

.contact-card:hover {
  background: var(--accent-bg);
}

.method.post {
  font-weight: 600;
  color: #8b4513;
  background: #fde8d8;
  align-self: flex-start;
  padding: 0.1rem 0.35rem;
  font-size: 0.65rem;
}

.contact-card .desc {
  font-family: var(--serif);
  font-size: 0.9rem;
  color: var(--muted);
}

.copyright {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 2rem;
}