:root {
  --bg: #0e1216;
  --panel: #171d24;
  --line: #2a3540;
  --text: #e8eef4;
  --muted: #8b9aab;
  --amber: #e6b325;
  --glass: #7eb6d9;
  --ink: #0a0d10;
  --warn: #d97a5a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; background: var(--bg); color: var(--text); font-family: "IBM Plex Sans", system-ui, sans-serif; }
body { min-height: 100vh; }
code, kbd {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.92em;
  background: var(--ink);
  border: 1px solid var(--line);
  padding: 0.08em 0.4em;
  color: var(--glass);
}
kbd { color: var(--amber); }
a { color: var(--glass); }
a:hover { color: #b7daf0; }
a:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 28px 20px 72px; }
.nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.brand {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  text-transform: uppercase;
  text-decoration: none;
}
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.join {
  font-family: "IBM Plex Mono", monospace;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 8px 12px;
  color: var(--glass);
  text-decoration: none;
}

header.hero { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; }
.callsign {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  text-transform: uppercase;
}
h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 600; margin: 8px 0 0; letter-spacing: -0.02em; }
h2 { font-size: 22px; margin: 0 0 10px; font-weight: 600; }
h3 { font-size: 16px; margin: 22px 0 8px; font-weight: 600; color: var(--text); }
p { color: var(--muted); line-height: 1.55; }
ul, ol { color: var(--text); padding-left: 18px; line-height: 1.7; }
li + li { margin-top: 4px; }
li p { margin: 0; }

.grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 28px; margin-top: 36px; }
.home-cta { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 28px; }
@media (max-width: 800px) {
  .grid, .home-cta, .doc { grid-template-columns: 1fr; }
  header.hero { flex-direction: column; }
}

.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
}
.card .tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
  text-transform: uppercase;
}
.card h2 { margin: 6px 0 6px; font-size: 18px; color: var(--text); }
.card p { margin: 0; }

.map { margin-top: 36px; border: 1px solid var(--line); background: #000; }
.map iframe { display: block; width: 100%; height: min(70vh, 720px); border: 0; }
.map-cap {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--muted);
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}
footer { margin-top: 28px; color: var(--muted); font-size: 14px; }

.doc { display: grid; grid-template-columns: 220px 1fr; gap: 36px; align-items: start; }
.toc {
  position: sticky;
  top: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 14px 0;
}
.toc .label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
  text-transform: uppercase;
  padding: 0 14px 10px;
}
.toc a {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 8px;
  padding: 7px 14px;
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  border-left: 2px solid transparent;
}
.toc a:hover { color: var(--text); background: #1d252e; }
.toc .gate {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  color: var(--amber);
}
.chapter {
  scroll-margin-top: 20px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
  margin-top: 28px;
}
.chapter:first-of-type { border-top: 0; margin-top: 0; padding-top: 0; }
.gate-head {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  margin: 0 0 14px;
  align-items: start;
}
.steps li::before {
  content: counter(step);
  font-family: "IBM Plex Mono", monospace;
  color: var(--ink);
  background: var(--amber);
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 600;
}
.steps strong { color: var(--text); }

.note, .warn {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 12px 14px;
  margin: 16px 0;
  color: var(--muted);
}
.warn { border-color: #5a3a32; }
.warn strong { color: var(--warn); }

table { width: 100%; border-collapse: collapse; margin: 14px 0 6px; font-size: 15px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}
td:first-child { color: var(--glass); font-family: "IBM Plex Mono", monospace; font-size: 13px; white-space: nowrap; }
.cmd td:first-child { color: var(--amber); }

.diagram {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  line-height: 1.35;
  background: var(--ink);
  border: 1px solid var(--line);
  padding: 16px 18px;
  color: var(--glass);
  overflow-x: auto;
  white-space: pre;
  margin: 14px 0;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}