/* The docs read like a logbook of the descent: a chapter strip that stays under
   the bar, one long column, and the depth gauge replaced by a reading rule. */

.docs-body { background: radial-gradient(90% 50% at 80% 0%, rgba(42, 31, 92, 0.45), rgba(4, 6, 13, 0) 60%), var(--bg); }
.docs-body .bar { right: 0; background: rgba(4, 6, 13, 0.94); border-bottom: 1px solid var(--line); }

.chapters {
  position: sticky;
  top: var(--bar);
  z-index: 15;
  display: flex;
  gap: 2px;
  overflow-x: auto;
  padding: 0 var(--gutter);
  background: rgba(4, 6, 13, 0.94);
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}
.chapters::-webkit-scrollbar { display: none; }
.chapters a { flex: none; display: flex; align-items: center; gap: 8px; min-height: 46px; padding: 0 14px; font: 400 11px/1 "Silkscreen", monospace; letter-spacing: 0.08em; color: var(--dim); text-decoration: none; text-transform: uppercase; }
.chapters a b { color: var(--gold); font-weight: 400; }
.chapters a.on { color: #1a0f02; background: var(--gold); }
.chapters a.on b { color: #1a0f02; }

.docs-head { position: relative; padding: calc(var(--bar) + 80px) var(--gutter) 40px; max-width: 1060px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) 180px; gap: 32px; align-items: end; }
.docs-head h1 { font-size: clamp(34px, 5vw, 64px); line-height: 1.04; }
.docs-head p { color: var(--dim); max-width: 60ch; }
.docs-head img { width: 180px; height: 180px; image-rendering: pixelated; }

.doc { max-width: 1060px; margin: 0 auto; padding: 0 var(--gutter) 120px; display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 0 40px; }
.doc section { grid-column: 1 / -1; display: grid; grid-template-columns: subgrid; padding-top: 64px; scroll-margin-top: calc(var(--bar) + 60px); }
.doc .ch { font: 700 13px/1.6 "Cinzel", serif; letter-spacing: 0.3em; color: var(--gold); padding-top: 10px; }
.doc .ch small { display: block; font: 400 10px/1.4 "Silkscreen", monospace; letter-spacing: 0.06em; color: var(--faint); margin-top: 6px; }
.doc .txt { min-width: 0; }
.doc h2 { font-size: clamp(26px, 3vw, 38px); margin: 0 0 18px; }
.doc h3 { font-size: 18px; margin: 28px 0 10px; color: var(--ice); }
.doc p, .doc li { font-size: 17px; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc li::marker { color: var(--gold); }

.formula { margin: 18px 0; padding: 16px 18px; background: rgba(11, 16, 48, 0.8); clip-path: var(--pix); font: 400 13px/1.9 "Silkscreen", monospace; color: #fff; overflow-x: auto; white-space: pre; }
.formula i { font-style: normal; color: var(--gold-hi); }
.formula em { font-style: normal; color: var(--faint); }

.note { margin: 18px 0; padding: 14px 16px; background: rgba(107, 63, 160, 0.16); box-shadow: inset 3px 0 0 var(--lilac); font-size: 16px; }
.note b { color: #fff; font-weight: 500; }

.tbl-wrap { overflow-x: auto; margin: 18px 0; }
.tbl { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 520px; }
.tbl th { text-align: left; font: 400 10px/1.4 "Silkscreen", monospace; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); padding: 8px 12px 8px 0; border-bottom: 1px solid var(--line); }
.tbl td { padding: 10px 12px 10px 0; border-bottom: 1px solid rgba(127, 246, 255, 0.07); vertical-align: top; }
.tbl td:first-child { font: 400 12px/1.5 "Silkscreen", monospace; color: var(--gold-hi); white-space: nowrap; }
.tbl td code { font-size: 11px; }
.tbl a { overflow-wrap: anywhere; }

.flow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin: 22px 0; }
.flow div { position: relative; background: rgba(11, 16, 48, 0.8); padding: 14px; clip-path: var(--pix); }
.flow b { display: block; font: 400 10px/1.4 "Silkscreen", monospace; color: var(--gold); letter-spacing: 0.08em; margin-bottom: 6px; }
.flow span { font-size: 15px; line-height: 1.45; }

.docs-foot { border-top: 1px solid var(--line); padding: 32px var(--gutter) 60px; text-align: center; color: var(--dim); font-size: 15px; }

@media (max-width: 760px) {
  .docs-head { grid-template-columns: minmax(0, 1fr); padding-top: calc(var(--bar) + 40px); }
  .docs-head img { width: 96px; height: 96px; order: -1; }
  .doc { grid-template-columns: minmax(0, 1fr); }
  .doc section { grid-template-columns: minmax(0, 1fr); padding-top: 48px; }
  .doc .ch { padding-top: 0; margin-bottom: 8px; }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}