/* ==========================================================================
   Optical — shared design system
   Anchored to the Optical Form brand tokens (source of truth:
   optical-form/brand/optical-form-tokens.css + AGENTS.md). Same --of-* values.
   Brand fonts loaded for real here (marketing site, not the app embed):
   Plus Jakarta Sans (UI/headings) + JetBrains Mono (data/values).
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* ---- Canonical brand tokens (mirror of optical-form-tokens.css) ---- */
  --of-coral-50:#FEF2EE; --of-coral-100:#FCE0D6; --of-coral-200:#F9C2AE; --of-coral-300:#F49E80;
  --of-coral-400:#F2805F; --of-coral-500:#E5512F; --of-coral-600:#D5421F; --of-coral-700:#B23618;
  --of-coral-800:#8E2C14; --of-coral-900:#6B2210;
  --of-white:#FFFFFF; --of-neutral-50:#FBF7F4; --of-neutral-100:#F3EEEA; --of-neutral-200:#E7E1DC;
  --of-neutral-300:#C9C2BC; --of-neutral-400:#8A827C; --of-neutral-600:#4B4540; --of-neutral-800:#2A2421; --of-neutral-900:#16110F;
  --of-primary:var(--of-coral-500); --of-primary-hover:var(--of-coral-600); --of-ink:var(--of-neutral-900); --of-bg:var(--of-neutral-50);
  --of-gradient-brand:linear-gradient(135deg,#F2805F 0%,#E1502F 50%,#D5421F 100%);
  --of-success:#1F8A5B; --of-success-bg:#DCF6E5; --of-slate:#1F3A5F;
  --of-font-sans:"Plus Jakarta Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --of-font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  /* ---- Working aliases (all point at brand tokens) ---- */
  --ink:var(--of-ink);
  --muted:var(--of-neutral-600);
  --faint:var(--of-neutral-400);
  --bg:var(--of-bg);
  --surface:var(--of-white);
  --border:var(--of-neutral-200);
  --border-strong:var(--of-neutral-300);
  --coral:var(--of-primary);
  --coral-050:var(--of-coral-50);
  --coral-100:var(--of-coral-100);
  --coral-600:var(--of-coral-600);
  --coral-700:var(--of-coral-700);
  --slate:var(--of-slate);
  --slate-050:#ECF1F7;
  --done:var(--of-success);
  --done-bg:var(--of-success-bg);
  --sans:var(--of-font-sans);
  --mono:var(--of-font-mono);
  --maxw:1040px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--coral-700); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

/* ---- Top brand rule (brand gradient) ---- */
.brandbar { height: 4px; background: var(--of-gradient-brand); }

/* ---- Nav ---- */
.nav { border-bottom: 1px solid var(--border); background: rgba(251,247,244,0.85); backdrop-filter: saturate(1.2) blur(8px); position: sticky; top: 0; z-index: 20; }
.nav-in { display: flex; align-items: center; gap: 20px; height: 62px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; letter-spacing: -0.02em; font-size: 17px; text-decoration: none; color: var(--ink); }
.brand .glyph { width: 26px; height: 26px; border-radius: 8px; background: var(--of-gradient-brand); display: inline-flex; align-items: center; justify-content: center; flex: none; box-shadow: 0 2px 6px -1px rgba(213,66,31,.45); }
.brand .glyph::after { content: ""; width: 9px; height: 9px; border-radius: 50%; background: #fff; box-shadow: inset -2.5px 0 0 rgba(0,0,0,.18); }
.brand small { font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--coral-700); font-weight: 600; margin-left: 2px; }
.brand-mark { width: 28px; height: 28px; border-radius: 8px; display: block; flex: none; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.nav-links a:not(.btn) { font-size: 14px; font-weight: 550; color: var(--muted); text-decoration: none; }
.nav-links a:not(.btn):hover { color: var(--ink); }
.lang-switch { display: inline-flex; align-items: center; gap: 1px; font-family: var(--mono); font-size: 12px; }
.lang-switch a { padding: 4px 7px; border-radius: 6px; color: var(--faint); text-decoration: none; font-weight: 600; letter-spacing: 0.03em; }
.lang-switch a.active { color: var(--coral-700); background: var(--coral-050); }
.lang-switch a:not(.active):hover { color: var(--ink); }
@media (max-width: 640px) {
  .nav-links { gap: 12px; }
  .nav-links > a:not(.btn) { display: none; }  /* hide text links, keep CTA + lang switch */
  .brand small { display: none; }
}

/* ---- Buttons ---- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-family: var(--sans); font-weight: 700; font-size: 15px; padding: 12px 20px; border-radius: 10px; text-decoration: none; border: 1.5px solid transparent; cursor: pointer; white-space: nowrap; transition: background-color .15s, border-color .15s, color .15s; }
.btn.sm { padding: 8px 14px; font-size: 14px; }
.btn.primary { background: var(--coral); color: #fff; }
.btn.primary:hover { background: var(--coral-600); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--border-strong); }
.btn.ghost:hover { background: var(--of-neutral-200); }
.btn.slate { background: var(--slate); color: #fff; }
:focus-visible { outline: 2px solid var(--coral); outline-offset: 3px; }

/* ---- Eyebrow / headings ---- */
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--coral-700); margin: 0 0 14px; font-weight: 600; }
h1, h2, h3 { text-wrap: balance; letter-spacing: -0.02em; }
.section { padding: 68px 0; }
.section-lbl { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--coral-700); margin: 0 0 10px; font-weight: 700; }
.section h2 { font-size: clamp(24px, 4vw, 32px); margin: 0 0 8px; font-weight: 780; }
.section .lead { font-size: 16px; color: var(--muted); margin: 0 0 32px; max-width: 62ch; }

/* ---- Badges / chips ---- */
.pill { display: inline-flex; align-items: center; gap: 7px; font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: 0.02em; background: #fff; border: 1px solid var(--coral-100); color: var(--coral-700); padding: 7px 12px; border-radius: 100px; }
.pill .d { width: 7px; height: 7px; border-radius: 50%; background: var(--coral); }

/* ---- Cards / grid ---- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; }
.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: 1fr 1fr; }
.g3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 780px) { .g2, .g3 { grid-template-columns: 1fr; } }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 40px 0 56px; }
.footer-in { display: flex; flex-wrap: wrap; gap: 28px 48px; }
.footer .col h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); margin: 0 0 12px; font-weight: 700; }
.footer .col a { display: block; font-size: 14px; color: var(--muted); text-decoration: none; margin: 7px 0; }
.footer .col a:hover { color: var(--ink); }
.footer .fine { width: 100%; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--faint); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---- Legal / prose ---- */
.prose { max-width: 720px; margin: 0 auto; padding: 56px 0 80px; }
.prose h1 { font-size: 34px; margin: 0 0 8px; font-weight: 800; }
.prose .updated { font-family: var(--mono); font-size: 12.5px; color: var(--faint); margin: 0 0 32px; }
.prose h2 { font-size: 19px; margin: 34px 0 8px; font-weight: 700; }
.prose p, .prose li { font-size: 15px; color: var(--of-neutral-800); }
.prose ul { padding-left: 20px; }
.prose li { margin: 6px 0; }
.prose .draft { background: var(--coral-050); border: 1px solid var(--coral-100); border-radius: 10px; padding: 14px 16px; font-size: 13.5px; color: var(--coral-700); margin: 0 0 28px; }
code { font-family: var(--mono); font-size: 0.86em; background: var(--coral-050); color: var(--coral-700); padding: 1px 5px; border-radius: 4px; }