/* ============================================================
   OD9 — THE CODEX  ·  canon / official-manifesto design language
   ------------------------------------------------------------
   Reading-FIRST dark theme. Every text/background pair is verified
   against WCAG 2.1 by tools/contrast_check.py — all body text clears
   AAA (>= 7:1); worst body pair 11.2:1. Do not darken a reading
   surface or dim body text below those numbers without re-checking.

   Canon (verbatim manifesto) reads in Spectral serif; the OD9 brand
   sans (Chakra Petch) frames it. Reverence via light + precision (a
   luminous data-crystal), NOT a leather grimoire. Tokens inlined;
   fonts via Google CDN (offda9.com isn't CSP-restricted).
   Used by: the canon lesson pages in scripts/web/curriculum/
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@500;600;700&family=Space+Grotesk:wght@400;500;600&family=Space+Mono:wght@400;700&family=Spectral:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400;1,500&display=swap');

:root{
  /* surfaces — page base (atmospheric margins) + a clearly-lighter READING panel */
  --page:#0E1216; --panel:#161B21; --hud:#0A0D10;
  /* accents */
  --gold:#D4AF37; --gold-bright:#FFD700; --gold-hi:#F6E27A; --gold-deep:#B8962B;
  --cyan:#00FFF7; --violet:#7A00FF; --violet-soft:#9B5CFF; --ice:#AADDFF; --diamond:#F4F6F8;
  /* text — verified bright enough to READ on the panel (see contrast_check.py) */
  --ink:#ECEFF1; --canon-ink:#EEF1F3; --read:#C9D1D6; --muted:#A7B0B6; --faint:#6B757B;
  --line:rgba(201,210,214,.12); --line-strong:rgba(201,210,214,.22);
  /* type */
  --font-display:"Chakra Petch",system-ui,sans-serif;
  --font-body:"Space Grotesk",system-ui,sans-serif;
  --font-mono:"Space Mono",ui-monospace,monospace;
  --font-canon:"Spectral",Georgia,"Times New Roman",serif;
  --r-md:8px;
  --glow-cyan:0 0 18px rgba(0,255,247,.35); --glow-gold:0 0 20px rgba(212,175,55,.40);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:
    radial-gradient(1100px 600px at 50% -12%, rgba(212,175,55,.10), transparent 55%),
    radial-gradient(900px 560px at 6% 22%, rgba(122,0,255,.10), transparent 55%),
    radial-gradient(950px 600px at 96% 88%, rgba(0,255,247,.07), transparent 55%),
    var(--page);
  color:var(--read); font-family:var(--font-canon); line-height:1.7;
  -webkit-font-smoothing:antialiased; min-height:100vh; overflow-x:hidden;
}
a{color:inherit}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}}

/* ---- top frame (minimal HUD) -------------------------------------------- */
.codex-hud{display:flex;align-items:center;gap:18px;padding:14px 26px;border-bottom:1px solid var(--line);background:rgba(10,13,16,.86);backdrop-filter:blur(8px);flex-wrap:wrap}
.codex-hud .brand{display:flex;align-items:center;gap:10px}
.codex-hud .brand img{height:28px;filter:drop-shadow(var(--glow-cyan))}
.codex-hud .brand b{font-family:var(--font-display);font-weight:700;letter-spacing:.22em;font-size:14px;color:var(--diamond)}
.codex-hud .zone{font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;color:var(--gold);text-transform:uppercase}
.codex-hud .spacer{flex:1}
.codex-hud .back{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase;text-decoration:none}
.codex-hud .back:hover{color:var(--cyan)}

/* ---- the reading column — SOLID panel, clearly lighter than the margins -- */
.codex{position:relative;max-width:800px;margin:0 auto;padding:36px 40px 92px;
  background:var(--panel);border-left:1px solid var(--line-strong);border-right:1px solid var(--line-strong);
  box-shadow:0 0 90px rgba(0,0,0,.5)}

/* ---- cover plate (atmospheric — no reading; dark is fine) ---------------- */
.codex-cover{position:relative;border:1px solid var(--line-strong);
  background:radial-gradient(130% 150% at 50% 0%,rgba(212,175,55,.16),transparent 55%),#0B0E12;
  aspect-ratio:16/7;overflow:hidden;margin-bottom:30px;box-shadow:0 18px 50px rgba(0,0,0,.5)}
.codex-cover>img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;opacity:.9}
.codex-cover .sigil{position:absolute;inset:0;z-index:0;display:flex;align-items:center;justify-content:center;font-family:var(--font-canon);font-weight:600;font-size:170px;line-height:1;color:rgba(246,226,122,.18);user-select:none}
.codex-cover .bk{position:absolute;z-index:2;width:26px;height:26px;border:2px solid var(--gold);box-shadow:var(--glow-gold)}
.codex-cover .bk.tl{top:-1px;left:-1px;border-right:0;border-bottom:0}
.codex-cover .bk.tr{top:-1px;right:-1px;border-left:0;border-bottom:0}
.codex-cover .bk.bl{bottom:-1px;left:-1px;border-right:0;border-top:0}
.codex-cover .bk.br{bottom:-1px;right:-1px;border-left:0;border-top:0}
.codex-cover .stamp{position:absolute;z-index:2;left:16px;top:14px;font-family:var(--font-mono);font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold-hi);background:rgba(8,10,13,.8);border:1px solid var(--line-strong);padding:5px 10px}

/* ---- title block -------------------------------------------------------- */
.codex-eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--ice);display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.codex-eyebrow::before{content:"";width:22px;height:1px;background:var(--gold);box-shadow:var(--glow-gold);flex:0 0 22px}
.codex-title{font-family:var(--font-canon);font-weight:700;font-size:clamp(36px,6.4vw,60px);line-height:1.05;letter-spacing:-.01em;color:var(--diamond);text-shadow:0 0 34px rgba(212,175,55,.20);margin-bottom:12px}
.codex-sub{font-family:var(--font-canon);font-style:italic;font-size:clamp(16px,2.4vw,20px);color:var(--read);max-width:54ch}
.codex-rule{height:1px;background:linear-gradient(90deg,var(--gold),transparent);margin:26px 0 30px}

/* ---- Archivist framing -------------------------------------------------- */
.archivist{display:flex;gap:16px;align-items:flex-start;border-left:2px solid var(--cyan);background:rgba(0,255,247,.06);padding:16px 18px;margin-bottom:34px;border-radius:0 var(--r-md) var(--r-md) 0}
.archivist .port{flex:0 0 52px;width:52px;height:52px;border-radius:50%;overflow:hidden;border:1px solid var(--cyan);box-shadow:var(--glow-cyan)}
.archivist .port img{width:100%;height:100%;object-fit:cover;object-position:center 22%}
.archivist .who{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);margin-bottom:5px}
.archivist .say{font-family:var(--font-canon);font-style:italic;font-size:16.5px;color:var(--ink);line-height:1.6}

/* ---- THE CANON block — a distinct WARM card, clearly lit, bright text ---- */
.canon{position:relative;border:1px solid rgba(212,175,55,.3);border-left:3px solid var(--gold);
  background:linear-gradient(180deg,#241E10,#1A160C);padding:32px 28px 26px;margin-bottom:18px;border-radius:0 var(--r-md) var(--r-md) 0;
  box-shadow:0 10px 36px rgba(0,0,0,.35)}
.canon::before{content:"\25C6 CANON \00B7 VERBATIM";position:absolute;top:0;right:14px;transform:translateY(-50%);
  font-family:var(--font-mono);font-size:9px;font-weight:700;letter-spacing:.18em;color:#0E1216;background:var(--gold);padding:3px 9px;border-radius:2px}
.canon-preamble{font-family:var(--font-canon);font-style:italic;font-size:clamp(18px,2.6vw,22px);line-height:1.55;color:var(--diamond);text-align:center;max-width:60ch;margin:4px auto 8px}
.canon-affirm{font-family:var(--font-mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--gold-hi);text-align:center;margin:14px auto 6px}

/* numbered principles */
.principle{display:grid;grid-template-columns:auto 1fr;gap:20px;padding:22px 0;border-top:1px solid rgba(212,175,55,.16)}
.principle .n{font-family:var(--font-canon);font-weight:700;font-size:32px;line-height:1;min-width:1.5em;text-align:right;color:var(--gold-hi)}
.principle .pname{font-family:var(--font-canon);font-weight:700;font-size:19px;color:var(--gold-hi);margin-bottom:5px;letter-spacing:.01em}
.principle .ptext{font-family:var(--font-canon);font-size:17px;color:var(--canon-ink);line-height:1.66}
.principle .gloss{margin-top:12px;font-family:var(--font-body);font-size:13.5px;color:var(--read);line-height:1.62;background:rgba(0,0,0,.22);border-left:2px solid var(--gold-deep);padding:10px 13px;border-radius:0 4px 4px 0}
.principle .gloss .lab{font-family:var(--font-mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);display:block;margin-bottom:4px}
.principle .gloss b{color:var(--ice);font-weight:600}

/* canon prose (e.g. the Thesean Method) */
.canon-p{font-family:var(--font-canon);font-size:17.5px;line-height:1.76;color:var(--canon-ink);margin:0 0 16px}
.canon-p.lead{font-size:19px;color:var(--diamond)}
.canon-p:first-of-type::first-letter{float:left;font-family:var(--font-canon);font-weight:700;font-size:64px;line-height:.74;padding:7px 13px 0 0;color:var(--gold-hi)}

/* ---- study / teaching layer (readable body) ----------------------------- */
.study{margin-top:42px}
.seg-label{font-family:var(--font-mono);font-size:10px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:10px;margin-bottom:18px}
.seg-label::before{content:"";width:18px;height:1px;background:var(--cyan);flex:0 0 18px}
.study h3{font-family:var(--font-display);font-weight:600;font-size:21px;color:var(--diamond);margin:26px 0 10px}
.study p{font-family:var(--font-body);font-size:15.5px;line-height:1.75;color:var(--read);margin-bottom:14px}
.study p b,.study li b{color:var(--ink);font-weight:600}
.study ul{list-style:none;margin:2px 0 16px;padding:0}
.study li{font-family:var(--font-body);font-size:15px;line-height:1.65;color:var(--read);padding-left:22px;position:relative;margin-bottom:10px}
.study li::before{content:"\25C6";position:absolute;left:0;top:4px;color:var(--gold);font-size:10px}

/* violet callout */
.codex-callout{border:1px solid var(--line-strong);border-left:3px solid var(--violet);background:rgba(122,0,255,.12);padding:18px 20px;margin:24px 0;border-radius:0 var(--r-md) var(--r-md) 0}
.codex-callout .co-k{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--violet-soft);margin-bottom:8px}
.codex-callout p{font-family:var(--font-body);font-size:15px;color:var(--ink);line-height:1.72;margin:0}

/* ---- source citation ---------------------------------------------------- */
.codex-source{font-family:var(--font-mono);font-size:11px;color:var(--muted);letter-spacing:.03em;line-height:1.6;margin-top:36px;padding-top:16px;border-top:1px solid var(--line)}
.codex-source b{color:var(--read);font-weight:400}

/* ---- footer return CTA -------------------------------------------------- */
.codex-foot{margin-top:38px;text-align:center}
.codex-foot .cta{display:inline-flex;align-items:center;gap:10px;padding:14px 28px;background:linear-gradient(180deg,var(--gold-hi),var(--gold),var(--gold-deep));color:#0E1216;
  font-family:var(--font-display);font-weight:700;letter-spacing:.04em;text-transform:uppercase;text-decoration:none;border-radius:var(--r-md);box-shadow:var(--glow-gold);font-size:13.5px}
.codex-foot .cta:hover{filter:brightness(1.06)}
.codex-foot .tagline{margin-top:22px;font-family:var(--font-mono);font-size:10px;letter-spacing:.34em;text-transform:uppercase;color:var(--faint)}

/* ---- embed mode (?embed=1 — inside the board reader modal) --------------- */
body.embed .codex-hud{display:none}
body.embed .codex-foot .tagline{display:none}
body.embed .codex{padding-top:24px}

/* ---- responsive --------------------------------------------------------- */
@media (max-width:560px){
  .codex{padding:24px 16px 72px}
  .canon{padding:24px 18px}
  .principle{grid-template-columns:1fr;gap:6px}
  .principle .n{text-align:left;font-size:26px}
  .codex-cover{aspect-ratio:16/9}
  .codex-cover .sigil{font-size:120px}
}