/* ProofMemo — public site brand, extended from ui/DESIGN.md (Evidentiary Workbench).
   Precise, calm, evidentiary. Its own feel: navy/blue/green, system-font clarity,
   status colours that map to the reader's pass / partial / fail language. */
:root{
  --primary:#0F2540; --on-primary:#FFFFFF; --secondary:#1C4E86; --action:#1E6B4A;
  --bg:#F5F7FA; --surface:#FFFFFF; --surface-subtle:#EEF2F6;
  --text:#172033; --text-muted:#526071; --border:#D8E0E8;
  --positive:#17663F; --positive-bg:#E6F4EC;
  --warning:#875000; --warning-bg:#FDF2D8;
  --danger:#A9271E; --danger-bg:#FCE9E7; --focus:#005FCC;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:SFMono-Regular,Consolas,"Liberation Mono",monospace;
  --r-sm:6px; --r-md:10px; --r-lg:14px; --r-full:999px;
  --wrap:1080px; --wrap-narrow:720px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--sans);color:var(--primary);letter-spacing:-0.02em;line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(2rem,4.5vw,2.9rem);font-weight:700}
h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;letter-spacing:-0.015em}
h3{font-size:1.2rem;font-weight:650;letter-spacing:-0.01em;line-height:1.3}
p{margin:0 0 1.1em}
a{color:var(--secondary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(1rem,4vw,2rem)}
.wrap-narrow{max-width:var(--wrap-narrow);margin:0 auto;padding:0 clamp(1rem,4vw,2rem)}
.section{padding:clamp(3rem,6vw,5rem) 0}
.section-tint{background:var(--surface-subtle)}
.section-surface{background:var(--surface)}
.section-dark{background:var(--primary);color:#DCE4EE}
.section-dark h1,.section-dark h2,.section-dark h3{color:#fff}
.eyebrow{font-size:.8rem;font-weight:650;letter-spacing:.08em;text-transform:uppercase;color:var(--secondary);margin-bottom:.6rem}
.section-dark .eyebrow{color:#7FA8D8}
.lead{font-size:clamp(1.05rem,2vw,1.25rem);color:var(--text-muted);max-width:60ch}
.section-dark .lead{color:#B9C6D6}
/* header/nav */
.site-header{position:sticky;top:0;z-index:20;background:var(--primary);color:var(--on-primary);border-bottom:1px solid rgba(255,255,255,.08)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:.55rem;color:#fff;font-weight:700;letter-spacing:-.01em;font-size:1.1rem}
.brand-mark{display:block;border-radius:6px}
.wm{font-weight:700;letter-spacing:-.02em;font-size:1.15rem}
.wm-proof{color:#fff}
.wm-memo{color:#5FBF8F}
.nav{display:flex;gap:1.4rem;align-items:center}
.nav a{color:#C7D3E2;font-size:.92rem;font-weight:500}
.nav a:hover,.nav a[aria-current]{color:#fff;text-decoration:none}
.btn{display:inline-block;background:var(--action);color:#fff;font-weight:600;font-size:.95rem;
  padding:.7rem 1.25rem;border-radius:var(--r-sm);border:0;cursor:pointer}
.btn:hover{background:#175a3d;text-decoration:none}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
/* cards + grids */
.grid{display:grid;gap:1.25rem}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:1.5rem}
.card h3{margin-top:0}
.card .k{font-family:var(--mono);font-size:.8rem;color:var(--secondary);font-weight:600}
/* status pills — the reader vocabulary */
.pill{display:inline-flex;align-items:center;gap:.4rem;font-size:.72rem;font-weight:650;
  letter-spacing:.02em;padding:.25rem .6rem;border-radius:var(--r-full);text-transform:uppercase}
.pill-ok{background:var(--positive-bg);color:var(--positive)}
.pill-warn{background:var(--warning-bg);color:var(--warning)}
.pill-bad{background:var(--danger-bg);color:var(--danger)}
.pill::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor}
/* obligation rows */
.oblig{border:1px solid var(--border);border-radius:var(--r-md);background:var(--surface);overflow:hidden}
.oblig-row{display:grid;grid-template-columns:1fr;gap:.4rem;padding:1.25rem 1.5rem;border-top:1px solid var(--border)}
.oblig-row:first-child{border-top:0}
.oblig-row h3{margin:0}
.oblig-row .duty{font-size:.85rem;color:var(--text-muted);font-weight:600}
.hero{background:linear-gradient(180deg,var(--primary),#0b1c31);color:#fff;padding:clamp(3.5rem,8vw,6rem) 0}
.hero h1{color:#fff;max-width:16ch}
.hero .eyebrow{color:#5FBF8F}
.hero .lead{color:#C7D3E2;margin-top:1rem}
.hero-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.8rem}
.cta-band{background:var(--action);color:#fff;text-align:center;padding:clamp(2.5rem,5vw,3.5rem) 0}
.cta-band h2{color:#fff}
.footer{background:#0b1c31;color:#8FA2B8;font-size:.85rem;padding:2.5rem 0}
.footer a{color:#B9C6D6}
.footer .disclaimer{max-width:70ch;line-height:1.6;margin-top:1rem}
.callout{border-left:3px solid var(--action);background:var(--surface-subtle);padding:1rem 1.25rem;border-radius:0 var(--r-sm) var(--r-sm) 0;margin:1.5rem 0}
@media(max-width:640px){.nav{gap:.9rem}.nav a{font-size:.82rem}.nav .btn{display:none}}