/* ============================================================================
   Cerebro architecture docs — Aurora design system
   Derived from the portfolio's inline "Aurora" reskin (index.html :root),
   extended with documentation components (side-by-side explain, code windows,
   diagram frames, stage-nav cards, pager). Self-contained; no external CSS.
   Only runtime dependency across the docs is Mermaid (CDN), for diagrams.
   ============================================================================ */

:root {
  --bg: #07080f;
  --panel: rgba(255, 255, 255, .035);
  --panel-2: rgba(255, 255, 255, .055);
  --panel-solid: #0f1120;
  --line: rgba(255, 255, 255, .09);
  --line-soft: rgba(255, 255, 255, .05);
  --line-hi: rgba(255, 255, 255, .22);
  --text: #e9ebf5;
  --text-2: #9298b0;
  --text-3: #676d86;
  --cyan: #22d3ee;
  --violet: #a855f7;
  --pink: #f472d0;
  --blue: #38bdf8;
  --sky: #7dd3fc;
  --green: #4ade80;
  --yellow: #facc15;
  --red: #fb7185;
  --term-bg: #0d1024;
  --term-bar: #171a33;
  --grad: linear-gradient(96deg, #22d3ee 0%, #a855f7 52%, #f472d0 100%);
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 16px;
  --radius-lg: 18px;
  --maxw: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { transition: none !important; transform: none !important; opacity: 1 !important; }
  body::before { animation: none !important; }
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ambient aurora drift + faint tech grid (fixed, behind content) */
body::before {
  content: "";
  position: fixed; inset: -25vmax; z-index: 0; pointer-events: none;
  background:
    radial-gradient(38vmax 38vmax at 12% 6%,  rgba(34, 211, 238, .20), transparent 60%),
    radial-gradient(34vmax 34vmax at 90% 16%, rgba(168, 85, 247, .18), transparent 60%),
    radial-gradient(30vmax 30vmax at 62% 104%, rgba(244, 114, 208, .14), transparent 62%);
  filter: blur(34px) saturate(135%);
  animation: aurora-drift 42s ease-in-out infinite;
  will-change: transform;
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, .028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .028) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(1200px 800px at 30% 0%, #000 0%, rgba(0, 0, 0, .3) 60%, rgba(0, 0, 0, .1) 100%);
          mask-image: radial-gradient(1200px 800px at 30% 0%, #000 0%, rgba(0, 0, 0, .3) 60%, rgba(0, 0, 0, .1) 100%);
}
@keyframes aurora-drift {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50%      { transform: translate3d(2.5vmax, -2vmax, 0) scale(1.08); }
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
a { color: inherit; }
code { font-family: var(--mono); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 4px; }

/* ---------------------------------------------------------------- nav ------ */
header.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 8, 15, .82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.nav { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { display: flex; align-items: baseline; gap: 10px; text-decoration: none; }
.logo b { font-family: var(--mono); font-size: 20px; font-weight: 700; color: var(--cyan); letter-spacing: -.02em; }
.logo span { font-size: 10.5px; letter-spacing: .24em; color: var(--text-2); text-transform: uppercase; }
.nav ul {
  display: flex; gap: 4px; list-style: none; margin-left: auto;
  overflow-x: auto; scrollbar-width: none;
}
.nav ul::-webkit-scrollbar { display: none; }
.nav ul a {
  display: block; padding: 8px 12px; border-radius: 8px;
  font-size: 14px; color: var(--text-2); text-decoration: none; white-space: nowrap;
}
.nav ul a:hover { color: var(--text); background: var(--panel); }
.nav ul a.here { color: var(--text); background: var(--panel-2); }
.nav ul a.cta { color: var(--text); font-weight: 600; }

/* ------------------------------------------------------- section chrome ---- */
main { padding-bottom: 90px; }
.eyebrow {
  font-family: var(--mono); font-size: 12px; font-weight: 700;
  letter-spacing: .24em; text-transform: uppercase;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  display: block; margin-bottom: 16px;
}
.grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.page-head { padding: 60px 0 8px; }
.page-title {
  font-size: clamp(30px, 4.6vw, 52px); font-weight: 800; letter-spacing: -.025em;
  line-height: 1.08; text-wrap: balance;
}
.page-sub {
  max-width: 720px; margin-top: 18px; color: var(--text-2);
  font-size: 18px; text-wrap: pretty;
}
h2.sec {
  font-size: clamp(22px, 2.6vw, 30px); font-weight: 750; letter-spacing: -.02em;
  margin: 56px 0 6px; scroll-margin-top: 84px;
}
h3.sub { font-size: 19px; font-weight: 700; margin: 30px 0 4px; color: var(--text); }
p { margin: 12px 0; color: var(--text); }
p.lead { color: var(--text-2); }
.section-note { color: var(--text-2); margin-top: 4px; }
ul.body, ol.body { margin: 12px 0 12px 22px; color: var(--text); }
ul.body li, ol.body li { margin: 6px 0; }
strong { color: #fff; font-weight: 650; }
em { color: var(--sky); font-style: normal; }

/* inline code */
p code, li code, td code, .body code {
  color: var(--cyan); background: rgba(34, 211, 238, .1);
  padding: 1px 7px; border-radius: 6px; font-size: .86em;
}

/* ---------------------------------------------------------- badges --------- */
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12.5px; color: #c9e9f5;
  border: 1px solid rgba(34, 211, 238, .4); border-radius: 999px;
  padding: 6px 14px;
}
.badge .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan); animation: badge-breathe 3.2s ease-in-out infinite;
}
@keyframes badge-breathe { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
.pill {
  display: inline-block; font-family: var(--mono); font-size: 11.5px; font-weight: 700;
  letter-spacing: .04em; padding: 3px 10px; border-radius: 999px;
  border: 1px solid var(--line-hi); color: var(--text-2);
}
.pill.gate { color: #cbb6f8; border-color: rgba(168, 85, 247, .45); background: rgba(168, 85, 247, .1); }
.pill.stage { color: #a9ecf8; border-color: rgba(34, 211, 238, .4); background: rgba(34, 211, 238, .08); }

/* ------------------------------------------------ side-by-side explain ----- */
.explain {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 22px 0;
}
.explain .col {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 20px 22px; backdrop-filter: blur(6px);
}
.explain .col h4 {
  font-family: var(--mono); font-size: 11.5px; font-weight: 700;
  letter-spacing: .2em; text-transform: uppercase; margin-bottom: 10px;
}
.explain .plain { border-top: 2px solid var(--cyan); }
.explain .plain h4 { color: var(--cyan); }
.explain .tech { border-top: 2px solid var(--violet); }
.explain .tech h4 { color: #c9a9f7; }
.explain .col p { margin: 8px 0; font-size: 15.5px; }
.explain .col p:first-of-type { margin-top: 0; }
.explain .tech code {
  color: var(--pink); background: rgba(244, 114, 208, .1);
}
@media (max-width: 760px) { .explain { grid-template-columns: 1fr; } }

/* ------------------------------------------------------- glass cards ------- */
.glass {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); backdrop-filter: blur(6px);
}
.cap {
  display: block; text-decoration: none; color: inherit;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 22px; transition: transform .25s ease, border-color .25s ease;
}
.cap:hover { transform: translateY(-3px); border-color: var(--line-hi); }
.cap .ic {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  font-family: var(--mono); font-weight: 700; margin-bottom: 14px;
  background: var(--ic-bg, rgba(34, 211, 238, .12)); color: var(--ic-fg, var(--cyan));
}
.cap h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.cap p { font-size: 14.5px; color: var(--text-2); margin: 0; }

/* -------------------------------------------------- stage-card nav grid ---- */
.stage-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px; margin: 24px 0;
}
.stage-card { position: relative; }
.stage-card .step {
  font-family: var(--mono); font-size: 11px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 8px;
}

/* ----------------------------------------------------- diagram frames ------ */
.diagram {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: rgba(9, 11, 24, .55); backdrop-filter: blur(6px);
  padding: 10px 10px 4px; margin: 22px 0; overflow-x: auto;
}
.diagram .mermaid { display: flex; justify-content: center; min-width: 0; }
.diagram figcaption {
  font-size: 13.5px; color: var(--text-2); text-align: center;
  padding: 10px 12px 8px; border-top: 1px solid var(--line-soft); margin-top: 8px;
}
.diagram .mermaid svg { max-width: 100%; height: auto; }

/* -------------------------------------------------------- code windows ----- */
.window {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--term-bg); overflow: hidden; margin: 18px 0;
}
.window .bar {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  background: var(--term-bar); border-bottom: 1px solid var(--line-soft);
}
.window .dots { display: flex; gap: 7px; }
.window .dots i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.window .dots i:nth-child(1) { background: #ff5f57; }
.window .dots i:nth-child(2) { background: #febc2e; }
.window .dots i:nth-child(3) { background: #28c840; }
.window .bar-title {
  font-family: var(--mono); font-size: 12.5px; color: var(--text-2); margin-left: 6px;
}
.window pre {
  margin: 0; padding: 16px 18px; overflow-x: auto;
  font-family: var(--mono); font-size: 13.5px; line-height: 1.65; color: #d6dcf0;
}
.window pre code { color: inherit; background: none; padding: 0; }
/* syntax tokens (match boost .tp/.tv/.tc/.tok/.cm/.tdim) */
.tp { color: var(--green); }       /* prompt / punctuation */
.tv { color: var(--cyan); }        /* command / name */
.tc { color: var(--violet); }      /* subcommand / keyword */
.tok { color: var(--pink); }       /* literal / arg */
.tdim { color: var(--text-3); }    /* dim */
.cm { color: var(--text-3); font-style: italic; } /* comment */
.ts { color: var(--yellow); }      /* string */
.tn { color: var(--sky); }         /* number */

/* --------------------------------------------------------- callouts -------- */
.callout {
  border: 1px solid var(--line); border-left: 3px solid var(--cyan);
  border-radius: 12px; background: var(--panel); padding: 14px 18px; margin: 18px 0;
}
.callout .k {
  font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--cyan); display: block; margin-bottom: 6px;
}
.callout p { margin: 4px 0; font-size: 15px; color: var(--text); }
.callout.warn { border-left-color: var(--yellow); }
.callout.warn .k { color: var(--yellow); }
.callout.danger { border-left-color: var(--red); }
.callout.danger .k { color: var(--red); }
.callout.safe { border-left-color: var(--green); }
.callout.safe .k { color: var(--green); }

/* ----------------------------------------------------------- tables -------- */
.tbl-scroll { overflow-x: auto; margin: 18px 0; }
table.data {
  width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 520px;
}
table.data th, table.data td {
  text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
table.data thead th {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--text-2); border-bottom: 1px solid var(--line);
}
table.data tbody tr:hover { background: var(--panel); }
table.data td.num { font-variant-numeric: tabular-nums; text-align: right; color: var(--sky); }
table.data td code { font-size: .86em; }

/* ------------------------------------------------------- references -------- */
.refs { list-style: none; margin: 14px 0; padding: 0; display: grid; gap: 8px; }
.refs li {
  border: 1px solid var(--line-soft); border-radius: 10px; background: var(--panel);
  padding: 11px 15px; font-size: 14.5px;
}
.refs a { color: var(--sky); text-decoration: none; font-family: var(--mono); font-size: 13.5px; }
.refs a:hover { text-decoration: underline; }
.refs .what { color: var(--text-2); }

/* ----------------------------------------------------------- pager --------- */
.pager {
  display: flex; justify-content: space-between; gap: 14px; margin-top: 60px;
  border-top: 1px solid var(--line-soft); padding-top: 26px; flex-wrap: wrap;
}
.pager a {
  flex: 1 1 260px; text-decoration: none; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--panel); padding: 16px 20px;
  transition: border-color .2s ease, transform .2s ease;
}
.pager a:hover { border-color: var(--line-hi); transform: translateY(-2px); }
.pager .dir { font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-3); }
.pager .ttl { display: block; margin-top: 6px; font-weight: 650; color: var(--text); }
.pager a.next { text-align: right; }

/* --------------------------------------------------- reveal + footer ------- */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media print { .reveal { opacity: 1 !important; transform: none !important; } body::before, body::after { display: none; } }

footer.site {
  border-top: 1px solid var(--line-soft); margin-top: 40px; padding: 34px 0;
  color: var(--text-2); font-size: 14px;
}
footer.site .brand b { color: var(--cyan); font-family: var(--mono); }
footer.site .links { margin-top: 8px; }
footer.site .links a { color: var(--text-2); text-decoration: none; }
footer.site .links a:hover { color: var(--text); }

/* legend chips */
.legend { display: flex; flex-wrap: wrap; gap: 12px 20px; margin: 16px 0; }
.legend .item { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--text-2); }
.legend .sw { width: 22px; height: 12px; border-radius: 4px; }