:root {
  --ink: #1d231a;
  --paper: #fbfaf6;
  --panel: #ffffff;
  --line: #e2e0d4;
  --accent: #c9960c;
  --accent-ink: #4a3900;
  --muted: #5c6356;
  --good: #2f6b3a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
}

.brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.01em;
}

.brand .sub {
  font-weight: 400;
  color: var(--muted);
  font-size: 13px;
  margin-left: 8px;
}

nav.pages {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-left: auto;
  max-width: 560px;
  justify-content: flex-end;
}

nav.pages a {
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  font-size: 13.5px;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

nav.pages a:hover {
  color: var(--ink);
}

nav.pages a.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

h1 {
  font-size: 28px;
  margin: 0 0 6px;
}

.lede {
  font-size: 16px;
  color: var(--muted);
  margin: 0 0 36px;
  max-width: 640px;
}

h2 {
  font-size: 19px;
  margin: 44px 0 12px;
  padding-top: 4px;
}

h2 .num {
  display: inline-block;
  width: 24px;
  color: var(--accent-ink);
  font-weight: 700;
}

p { margin: 0 0 14px; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 16px 0;
}

.card.highlight {
  border-color: #e3cf8a;
  background: #fffdf5;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

.tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--good);
  background: #e9f3ea;
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 10px;
}

.tag.caveat {
  color: var(--accent-ink);
  background: #faf0d6;
}

.pipeline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 8px;
}

.pipeline .step {
  flex: 1 1 140px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 14px;
  position: relative;
}

.pipeline .step .n {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-ink);
  letter-spacing: 0.04em;
}

.pipeline .step h4 {
  margin: 4px 0 6px;
  font-size: 14px;
}

.pipeline .step p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.pipeline .arrow {
  display: flex;
  align-items: center;
  color: var(--line);
  font-size: 20px;
}

@media (max-width: 760px) {
  .pipeline .arrow { display: none; }
}

table.facts {
  width: 100%;
  border-collapse: collapse;
  margin: 10px 0 28px;
  font-size: 14px;
}

table.facts th, table.facts td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

table.facts th {
  width: 190px;
  color: var(--muted);
  font-weight: 600;
}

footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px 60px;
  color: var(--muted);
  font-size: 13px;
}

footer a { color: var(--accent-ink); }

code {
  background: #f0eee3;
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 13px;
}

/* ---- table of contents ---- */
.toc {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 20px;
  margin: 0 0 32px;
}
.toc .toc-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.toc ol {
  columns: 2;
  margin: 0;
  padding-left: 18px;
  font-size: 13.5px;
}
.toc li { margin-bottom: 5px; break-inside: avoid; }
.toc a { color: var(--ink); text-decoration: none; }
.toc a:hover { color: var(--accent-ink); text-decoration: underline; }
@media (max-width: 600px) { .toc ol { columns: 1; } }

/* ---- numbered step lists (install/admin guides) ---- */
.steps { list-style: none; margin: 0 0 24px; padding: 0; counter-reset: step; }
.steps > li {
  counter-increment: step;
  position: relative;
  padding: 2px 0 20px 42px;
  border-left: 2px solid var(--line);
  margin-left: 15px;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 2px; }
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: -16px;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent);
  color: #2a2000;
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.steps h4 { margin: 2px 0 6px; font-size: 15px; }
.steps p { margin: 0 0 6px; font-size: 14px; color: var(--muted); }

/* ---- FAQ / Q&A ---- */
.qa { margin: 0 0 18px; }
.qa dt {
  font-weight: 600;
  font-size: 15px;
  margin: 0 0 6px;
  padding-left: 22px;
  position: relative;
}
.qa dt::before {
  content: "Q";
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-ink);
  background: #faf0d6;
  border-radius: 4px;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.qa dd {
  margin: 0 0 20px 22px;
  color: var(--muted);
  font-size: 14px;
}

/* ---- key/value definition grid (glossary) ---- */
.glossary dt {
  font-weight: 700;
  font-size: 14px;
  margin-top: 16px;
}
.glossary dd {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---- network boundary diagram ---- */
.netdiagram {
  border: 1px dashed #b9b398;
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0 28px;
  background: repeating-linear-gradient(135deg, #f5f3e9, #f5f3e9 10px, #f1efe2 10px, #f1efe2 20px);
}
.netdiagram .zone-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.netdiagram .boxes {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: stretch;
}
.netdiagram .box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  flex: 1 1 160px;
  font-size: 13px;
}
.netdiagram .box h5 { margin: 0 0 4px; font-size: 13.5px; }
.netdiagram .box p { margin: 0; color: var(--muted); font-size: 12.5px; }
.netdiagram .box.outside { border-style: dashed; opacity: 0.85; }
.netdiagram .conn {
  text-align: center;
  font-size: 11px;
  color: var(--muted);
  margin: 2px 0;
}

/* ---- UI mockup blocks (user guide) ---- */
.mockup {
  background: #24291f;
  color: #dfe6d2;
  border-radius: 10px;
  padding: 14px 16px;
  margin: 14px 0 20px;
  font-size: 13px;
}
.mockup .mockup-title {
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a9b89a;
  margin-bottom: 8px;
}
.mockup .row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 6px; }
.mockup .chip {
  background: #39402f;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
}
.mockup .chip.on { background: var(--accent); color: #2a2000; font-weight: 600; }

/* ---- small badge row ---- */
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 20px; }
.badge {
  font-size: 12px;
  background: #eef0e4;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 10px;
  color: var(--ink);
}

.callout {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 16px;
  margin: 18px 0;
  color: var(--muted);
  font-size: 14px;
}

.subtle-list { padding-left: 20px; font-size: 14px; }
.subtle-list li { margin-bottom: 6px; }