@font-face { font-family:'JetBrains Mono'; font-weight:100 800; font-style:normal; font-display:swap; src:url(fonts/jbmono.woff2) format('woff2'); }
@font-face { font-family:'Geist Pixel'; font-weight:400; font-style:normal; font-display:swap; src:url(fonts/geistpixel.woff2) format('woff2'); }
@font-face { font-family:'DotGothic16'; font-weight:400; font-style:normal; font-display:swap; src:url(fonts/dotgothic16.woff2) format('woff2'); }
@font-face { font-family:'DotGothic16'; font-weight:400; font-style:normal; font-display:swap; unicode-range:U+81ea; src:url(fonts/dotgothic16-kanji-jiru.woff2) format('woff2'); }
@font-face { font-family:'DotGothic16'; font-weight:400; font-style:normal; font-display:swap; unicode-range:U+3081-308f; src:url(fonts/dotgothic16-hiragana.woff2) format('woff2'); }

:root {
  --bg: #050806;
  --pane: #0A100B;
  --pane2: #0d1410;
  --line: #1A241B;
  --ink: #DFE7DD;
  --dim: #84937F;
  --faint: #4B5749;
  --green: #43F53B;
  --green-dim: rgba(67,245,59,0.10);
  --red: #FF5348;
  --red-dim: rgba(255,83,72,0.12);
  --amber: #D9A441;
  --amber-dim: rgba(217,164,65,0.12);
}

* { box-sizing: border-box; }
html { background: var(--bg); color-scheme: dark; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 14.5px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
::selection { background: var(--green); color: var(--bg); }

.dotf {
  font-family: 'Geist Pixel', 'DotGothic16', monospace;
  font-variation-settings: 'ELSH' 1;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* ---- top nav ---- */
nav.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(5,8,6,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-in {
  max-width: 1220px; margin: 0 auto; padding: 0 28px;
  display: flex; justify-content: space-between; align-items: center;
  height: 54px; font-size: 12.5px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.06em; text-decoration: none; }
.logo em { font-style: normal; color: var(--green); }
.nav-links { display: flex; gap: 20px; color: var(--dim); }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--green); }

/* ---- shell layout ---- */
.shell {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

.sidebar {
  position: sticky;
  top: 78px;
  padding: 40px 0;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.sidebar .group-label {
  font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--faint); margin-bottom: 8px;
}
.sidebar nav { display: flex; flex-direction: column; gap: 2px; }
.sidebar nav a {
  text-decoration: none; color: var(--dim); font-size: 13px;
  padding: 6px 10px; border-radius: 5px; border-left: 2px solid transparent;
  transition: color .15s, border-color .15s, background .15s;
}
.sidebar nav a:hover { color: var(--ink); }
.sidebar nav a.active { color: var(--green); border-left-color: var(--green); background: var(--green-dim); }

main { min-width: 0; padding: 44px 0 100px; }

/* ---- hero (small, utilitarian) ---- */
.hero { padding: 46px 0 30px; border-bottom: 1px solid var(--line); margin-bottom: 40px; }
.eyebrow { font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--green); margin-bottom: 16px; }
h1.title {
  font-family: 'Geist Pixel', 'DotGothic16', monospace;
  font-variation-settings: 'ELSH' 3;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 400; letter-spacing: 0.02em; text-transform: uppercase;
  margin: 0 0 16px; text-wrap: balance; color: #f2f5ef;
}
.hero p { color: var(--dim); max-width: 640px; margin: 0; font-size: 14px; line-height: 1.9; }

/* ---- doc content ---- */
.doc h2 {
  font-family: 'Geist Pixel', 'DotGothic16', monospace;
  font-variation-settings: 'ELSH' 1;
  font-size: 22px; font-weight: 400; text-transform: uppercase; letter-spacing: 0.02em;
  color: #f2f5ef;
  margin: 46px 0 18px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 74px;
}
.doc > h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }

.doc h3 {
  font-size: 13.5px; font-weight: 700; color: var(--ink);
  margin: 26px 0 8px; letter-spacing: 0.01em;
}
.doc h3::before { content: "> "; color: var(--green); }

.doc p { color: var(--ink); margin: 0 0 14px; max-width: 720px; }
.doc p, .doc li { font-size: 14px; line-height: 1.85; }
.doc ul, .doc ol { color: var(--ink); max-width: 720px; padding-left: 22px; margin: 0 0 16px; }
.doc li { margin-bottom: 6px; }
.doc li::marker { color: var(--faint); }
.doc strong { color: #f2f5ef; font-weight: 600; }
.doc em { color: var(--dim); font-style: italic; }

.doc code {
  background: var(--pane2);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.92em;
  color: var(--green);
}
.doc pre {
  background: var(--pane);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 0 0 18px;
}
.doc pre code {
  background: none; border: none; padding: 0;
  color: var(--ink); font-size: 13px; line-height: 1.7;
}

.doc a { color: var(--green); text-decoration: none; border-bottom: 1px solid rgba(67,245,59,0.35); }
.doc a:hover { color: #8bffab; }

.doc blockquote {
  border-left: 2px solid var(--green);
  padding: 2px 0 2px 18px;
  margin: 0 0 18px;
  color: var(--dim);
  max-width: 680px;
}
.doc blockquote p { color: var(--dim); margin: 0; }

.doc hr { border: none; border-top: 1px solid var(--line); margin: 36px 0; }

.tblwrap { overflow-x: auto; margin: 0 0 22px; border: 1px solid var(--line); border-radius: 8px; background: var(--pane); }
.doc table { border-collapse: collapse; width: 100%; font-size: 13px; }
.doc th {
  text-align: left; color: var(--faint); font-weight: 600;
  font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.doc td {
  padding: 12px 16px; border-bottom: 1px solid var(--line);
  color: var(--ink); vertical-align: top;
  font-variant-numeric: tabular-nums;
}
.doc tr:last-child td { border-bottom: none; }
.doc td:first-child { color: var(--ink); white-space: nowrap; }

.tag {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.08em;
  padding: 3px 9px; border-radius: 4px; text-transform: uppercase; white-space: nowrap;
}
.tag.l { color: var(--green); background: var(--green-dim); }
.tag.r { color: var(--red); background: var(--red-dim); }
.tag.a { color: var(--amber); background: var(--amber-dim); }
.tag.n { color: var(--dim); background: rgba(132,147,127,0.10); }

/* ---- footer ---- */
footer { border-top: 1px solid var(--line); padding: 32px 0 40px; }
.foot-in {
  max-width: 1220px; margin: 0 auto; padding: 0 28px;
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  font-size: 12px; color: var(--faint);
}
.foot-in a { color: var(--dim); text-decoration: none; }
.foot-in a:hover { color: var(--green); }