/* ===========================================================================
   O-VERSE · ov-site.css — shared front-door chrome ("Ledger Light")  · S158
   Single source of truth for: tokens · base · buttons · nav (+ mobile
   hamburger) · section rhythm · footer · scroll-reveal. Extracted verbatim
   from the S157 pages (OI-S157-CSS). Page-specific CSS stays inline per page.
   Pair with /fonts.css (self-hosted IBM Plex · CSP 'self') and /ov-site.js.
   Palette encodes meaning: indigo=intelligence · emerald=profit · amber=leak.
   Semantic token names only (no --color-*) → passes the design-token CI guard.
   =========================================================================== */
:root{
  --paper:#FBFBFD;        /* cool near-white, NOT cream */
  --paper-2:#F3F4FB;      /* faint indigo-tinted band */
  --card:#FFFFFF;
  --ink:#16161F;          /* near-black, hint of indigo */
  --ink-soft:#585A6B;     /* secondary text */
  --ink-faint:#8A8C9C;    /* captions */
  --line:#E8E8F1;         /* hairline */
  --brand:#4F46E5;        /* indigo · intelligence */
  --brand-deep:#3730A3;
  --brand-ink:#221C5E;    /* cockpit dark surface */
  --brand-ink-2:#191545;
  --profit:#059669;       /* emerald · profit revealed (the signal) */
  --profit-soft:#D1FAE5;
  --leak:#D97706;         /* amber · the leak / squeeze (used sparingly) */
  --leak-soft:#FEF3C7;
  --radius:18px;
  --radius-sm:12px;
  --maxw:1120px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"IBM Plex Sans Thai",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono","SFMono-Regular",ui-monospace,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--paper);
  font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
.mono{font-family:var(--mono);font-feature-settings:"tnum" 1}

/* ---- buttons ---- */
.btn{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font);
  font-weight:600;font-size:16px;border-radius:999px;padding:13px 24px;cursor:pointer;
  border:1.5px solid transparent;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s;
  line-height:1;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 22px -8px rgba(79,70,229,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px -8px rgba(79,70,229,.6);background:var(--brand-deep)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--brand-deep)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 12px 30px -10px rgba(0,0,0,.35)}
.btn:focus-visible{outline:3px solid var(--brand);outline-offset:3px}
a:focus-visible,input:focus-visible,button:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:6px}

/* ---- nav (+ mobile hamburger) ---- */
.nav{position:sticky;top:0;z-index:50;background:rgba(251,251,253,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;letter-spacing:-.01em}
.logo .mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--profit));position:relative;flex:none}
.logo .mark::after{content:"";position:absolute;inset:7px 7px auto auto;width:8px;height:8px;border-radius:50%;background:#fff}
.nav-links{display:flex;align-items:center;gap:28px;font-size:15px;font-weight:500;color:var(--ink-soft)}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-burger{display:none;width:42px;height:42px;flex:none;align-items:center;justify-content:center;
  background:var(--card);border:1px solid var(--line);border-radius:11px;cursor:pointer;padding:0}
.nav-burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform .2s var(--ease),opacity .15s}
.nav-burger span+span{margin-top:4px}
.nav[data-open="true"] .nav-burger span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav[data-open="true"] .nav-burger span:nth-child(2){opacity:0}
.nav[data-open="true"] .nav-burger span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---- generic section rhythm ---- */
.sec{padding:92px 0}
.eyebrow{font-family:var(--mono);font-size:13px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);margin:0 0 16px}
h1,h2,h3{letter-spacing:-.02em;line-height:1.12;margin:0}
.h2{font-size:clamp(28px,4.4vw,46px);font-weight:700}
.lead{font-size:18px;color:var(--ink-soft);max-width:60ch}

/* ---- footer ---- */
footer{background:var(--ink);color:#B9BAC9;padding:54px 0 40px;font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:30px}
footer .logo{color:#fff;font-size:18px}
footer a{color:#B9BAC9}footer a:hover{color:#fff}
.f-cols{display:flex;gap:54px;flex-wrap:wrap}
.f-col h4{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:#7E80A0;margin:0 0 14px;font-weight:600;font-family:var(--mono)}
.f-col a{display:block;margin-bottom:9px}
.f-legal{width:100%;border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:22px;color:#7E80A0;font-size:12.5px}

/* ---- scroll-reveal ---- */
.fx{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.fx.in{opacity:1;transform:none}

/* ---- chrome responsive ---- */
@media(max-width:860px){
  .sec{padding:64px 0}
  .nav-burger{display:inline-flex}
  .nav-links{display:none}
  .nav-cta .ghost-sm{display:none}
  .nav[data-open="true"] .nav-links{
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    position:absolute;top:66px;left:0;right:0;background:var(--paper);
    border-bottom:1px solid var(--line);padding:6px 24px 16px;
    box-shadow:0 26px 44px -30px rgba(34,28,94,.5)
  }
  .nav[data-open="true"] .nav-links a{padding:14px 2px;border-bottom:1px solid var(--line);font-size:16px}
  .nav[data-open="true"] .nav-links a:last-child{border-bottom:0}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto!important}
  .fx{opacity:1;transform:none;transition:none}
  .nav-burger span{transition:none}
}