/* ATOMIC · AI Research — light, clinical, credible. Blue + white per brand. */
:root{
  --ink:#0b1f3a;            /* deep navy text */
  --ink-soft:#456086;
  --ink-faint:#7089a8;
  --ground:#f4f8fc;         /* very light blue-white */
  --panel:#ffffff;
  --panel-2:#eef4fb;
  --line:#d9e4f0;
  --line-strong:#c4d4e6;
  --accent:#1f6feb;         /* clinical blue */
  --accent-ink:#14509e;
  --accent-soft:#e7f0ff;
  --safe:#1a7f4b;
  --safe-soft:#e5f4ec;
  --safe-line:#a9d8bd;
  --amber:#b06a06;
  --amber-soft:#fbf1dd;
  --radius:16px;
  --shadow:0 1px 2px rgba(11,31,58,.05), 0 10px 30px rgba(11,31,58,.07);
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--sans);line-height:1.55;
  -webkit-font-smoothing:antialiased}
a{color:var(--accent-ink);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1060px;margin:0 auto;padding:0 24px}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(244,248,252,.86);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;letter-spacing:-.01em;color:var(--ink)}
.brand .mk{width:30px;height:30px;border-radius:9px;background:var(--accent);color:#fff;
  display:grid;place-items:center;font-size:15px;font-weight:800}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--ink-faint);letter-spacing:.12em;
  text-transform:uppercase;margin-top:-2px}
.top nav{display:flex;gap:22px;align-items:center;font-size:14px;font-weight:550}
.top nav a{color:var(--ink-soft)}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;font-weight:600;
  font-size:14px;padding:10px 18px;border-radius:10px;border:1px solid var(--accent);cursor:pointer;
  transition:transform .06s ease, box-shadow .2s ease}
.btn:hover{text-decoration:none;box-shadow:0 6px 18px rgba(31,111,235,.28);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--accent-ink)}
.btn.ghost:hover{background:var(--accent-soft);box-shadow:none}
@media (max-width:680px){.top nav a:not(.btn){display:none}}

/* hero */
.hero{padding:72px 0 40px;text-align:center}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent-ink);font-weight:600;margin:0 0 16px}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.08;letter-spacing:-.025em;margin:0 auto 18px;
  max-width:16ch;text-wrap:balance;font-weight:800}
.hero p.lead{font-size:clamp(16px,2.2vw,20px);color:var(--ink-soft);max-width:60ch;margin:0 auto 28px}
.hero .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* trust band */
.trust{margin:26px 0 8px}
.trust .band{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;box-shadow:var(--shadow)}
@media (max-width:760px){.trust .band{grid-template-columns:1fr}}
.trust .item{display:flex;gap:13px;align-items:flex-start}
.trust .item .ic{flex:0 0 auto;width:34px;height:34px;border-radius:9px;background:var(--accent-soft);
  color:var(--accent-ink);display:grid;place-items:center;font-size:16px}
.trust .item b{display:block;font-size:14.5px;margin-bottom:2px}
.trust .item span{font-size:13px;color:var(--ink-soft)}

/* sections */
section{padding:52px 0}
.sec-head{margin:0 0 26px}
.sec-head .eyebrow{margin-bottom:10px}
.sec-head h2{font-size:clamp(22px,3.2vw,32px);letter-spacing:-.02em;margin:0 0 8px;font-weight:760}
.sec-head p{font-size:16px;color:var(--ink-soft);max-width:64ch;margin:0}

/* model cards */
.models{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media (max-width:760px){.models{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  box-shadow:var(--shadow);display:flex;flex-direction:column;transition:border-color .2s,box-shadow .2s}
.card:hover{border-color:var(--line-strong);box-shadow:0 4px 10px rgba(11,31,58,.06),0 16px 40px rgba(11,31,58,.09)}
.card .top-row{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.card .ic{width:48px;height:48px;border-radius:13px;background:var(--accent-soft);display:grid;
  place-items:center;font-size:24px}
.card h3{margin:0;font-size:20px;font-weight:730;letter-spacing:-.01em}
.card .tag{font-size:13px;color:var(--ink-faint)}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:650;font-family:var(--mono);
  letter-spacing:.03em;text-transform:uppercase;padding:3px 9px;border-radius:20px;
  background:var(--amber-soft);color:var(--amber);border:1px solid #ecca8a}
.chip.live{background:var(--safe-soft);color:var(--safe);border-color:var(--safe-line)}
.card p.summary{font-size:14.5px;color:var(--ink-soft);margin:6px 0 16px}
.card .aspects{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:18px}
.card .aspects .a{font-size:12.5px;background:var(--panel-2);border:1px solid var(--line);
  padding:4px 10px;border-radius:8px;color:var(--ink-soft);display:inline-flex;gap:6px;align-items:center}
.card .foot{margin-top:auto;display:flex;gap:10px;align-items:center}

/* how it works */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s}
@media (max-width:820px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:460px){.steps{grid-template-columns:1fr}}
.step{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px;position:relative}
.step .num{font-family:var(--mono);font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.05em}
.step h4{margin:8px 0 5px;font-size:15.5px;font-weight:680}
.step p{margin:0;font-size:13px;color:var(--ink-soft)}

/* integrity callout */
.integrity{background:var(--safe-soft);border:1px solid var(--safe-line);border-radius:var(--radius);
  padding:26px 28px;display:flex;gap:18px;align-items:flex-start}
.integrity .ic{flex:0 0 auto;width:40px;height:40px;border-radius:11px;background:var(--safe);color:#fff;
  display:grid;place-items:center;font-size:19px}
.integrity h3{margin:0 0 6px;font-size:18px;color:var(--safe);font-weight:730}
.integrity p{margin:0;font-size:14.5px;color:var(--ink)}
.integrity b{color:var(--safe)}

/* roadmap page */
.model-hero{padding:40px 0 8px}
.model-hero .back{font-size:13px;color:var(--ink-soft);display:inline-flex;gap:6px;margin-bottom:18px}
.model-hero .row{display:flex;align-items:center;gap:16px;margin-bottom:14px}
.model-hero .ic{width:60px;height:60px;border-radius:16px;background:var(--accent-soft);display:grid;
  place-items:center;font-size:30px}
.model-hero h1{margin:0;font-size:clamp(26px,4vw,38px);letter-spacing:-.02em}
.model-hero .tag{color:var(--ink-soft);font-size:15px}
.grid2{display:grid;grid-template-columns:1.3fr 1fr;gap:24px;align-items:start}
@media (max-width:820px){.grid2{grid-template-columns:1fr}}
.rmphase{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px;
  margin-bottom:14px;box-shadow:var(--shadow)}
.rmphase .ph{display:flex;align-items:center;gap:10px;font-weight:700;font-size:15px;margin-bottom:10px}
.rmphase .ph .dot{width:11px;height:11px;border-radius:50%}
.rmphase.done .ph .dot{background:var(--safe)} .rmphase .ph .dot{background:var(--amber)}
.rmphase ul{margin:0;padding-left:2px;list-style:none;display:flex;flex-direction:column;gap:8px}
.rmphase li{display:flex;gap:10px;font-size:14px;color:var(--ink-soft)}
.rmphase li::before{content:"";flex:0 0 auto;width:16px;height:16px;margin-top:3px;border-radius:5px;
  background:var(--panel-2);border:1px solid var(--line-strong)}
.rmphase.done li::before{content:"✓";background:var(--safe-soft);border-color:var(--safe-line);
  color:var(--safe);font-size:11px;display:grid;place-items:center;font-weight:800}
.needs{background:var(--accent-soft);border:1px solid var(--accent);border-radius:14px;padding:20px 22px}
.needs h3{margin:0 0 10px;font-size:16px;color:var(--accent-ink)}
.needs ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:8px}
.needs li{font-size:14px;color:var(--ink)}

/* form */
.formcard{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);max-width:620px;margin:0 auto}
.formcard .field{margin-bottom:16px}
.formcard label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px}
.formcard input,.formcard select,.formcard textarea{width:100%;padding:11px 13px;border:1px solid var(--line-strong);
  border-radius:10px;font-size:14px;font-family:inherit;background:var(--ground);color:var(--ink)}
.formcard input:focus,.formcard select:focus,.formcard textarea:focus{outline:2px solid var(--accent);
  outline-offset:1px;border-color:var(--accent)}
.formcard textarea{resize:vertical;min-height:90px}
.formcard .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:520px){.formcard .row2{grid-template-columns:1fr}}
.formmsg{margin-top:14px;font-size:14px;padding:12px 14px;border-radius:10px;display:none}
.formmsg.ok{display:block;background:var(--safe-soft);border:1px solid var(--safe-line);color:var(--safe)}
.formmsg.err{display:block;background:#fbe9e6;border:1px solid #eeb7ad;color:#c0392b}

/* footer */
footer{border-top:1px solid var(--line);padding:34px 0;margin-top:30px;color:var(--ink-faint);font-size:13px}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.disclaimer{margin-top:8px;font-size:12px;color:var(--ink-faint);max-width:70ch}