/* Meridian Research Supply - shared design system (light, clinical, one accent) */
:root{
  --bg:#f6f7f9;--surface:#ffffff;--surface-2:#eef0f3;--line:#e2e5ea;--line-strong:#c9cdd5;
  --ink:#0f1318;--ink-2:#3a424d;--dim:#697280;--faint:#9aa3b0;
  --accent:#1e4fd6;--accent-ink:#153aa3;--accent-soft:#e8edfb;
  --ok:#157a4a;--ok-soft:#e5f3ec;--no:#b3261e;--no-soft:#fbe9e7;
  --r:6px;--nav:64px;--max:1200px;
  --font:'Geist',ui-sans-serif,system-ui,-apple-system,'Segoe UI',sans-serif;--mono:'Geist Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit}
.mono{font-family:var(--mono)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
/* RUO strip */
.ruo{background:var(--ink);color:#d9dee6;font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;text-align:center;padding:8px 16px}
.ruo b{color:#fff;font-weight:600}
/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(246,247,249,.86);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{height:var(--nav);display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:-.01em;font-size:15.5px;white-space:nowrap}
.brand .mk{width:26px;height:26px;border-radius:50%;border:1.5px solid var(--ink);position:relative;flex:none}
.brand .mk:after{content:"";position:absolute;left:50%;top:3px;bottom:3px;width:1.5px;background:var(--accent);transform:translateX(-50%)}
.links{display:flex;gap:26px;font-size:14.5px;color:var(--ink-2)}
.links a{padding:6px 0;border-bottom:1.5px solid transparent}
.links a:hover,.links a.on{color:var(--ink);border-color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 18px;border-radius:var(--r);font-weight:600;font-size:14.5px;border:1px solid transparent;cursor:pointer;transition:transform .12s ease,background .15s ease,border-color .15s ease;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-ink)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink)}.btn-ghost:hover{border-color:var(--ink)}
.btn-ink{background:var(--ink);color:#fff}.btn-ink:hover{background:#242b34}
.btn .count{background:rgba(255,255,255,.22);border-radius:999px;min-width:22px;height:22px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-family:var(--mono);padding:0 7px}
/* section rhythm */
section{padding:88px 0}
.sec-tight{padding:56px 0}
h1,h2,h3{letter-spacing:-.02em;line-height:1.1;font-weight:600}
h1{font-size:clamp(34px,4.6vw,58px)}
h2{font-size:clamp(26px,3vw,38px)}
h3{font-size:18px;letter-spacing:-.01em}
.lead{font-size:18px;color:var(--ink-2);max-width:56ch;line-height:1.5}
p{color:var(--ink-2)}
.dim{color:var(--dim)}
.hair{border:0;border-top:1px solid var(--line)}
/* media slots */
.media{position:relative;overflow:hidden;border-radius:var(--r);background:linear-gradient(160deg,#eaedf2,#d9dee6);border:1px solid var(--line)}
.media img{width:100%;height:100%;object-fit:cover}
.media.ph:before{content:attr(data-label);position:absolute;inset:auto 12px 12px auto;font:500 11px/1 var(--mono);color:var(--dim);background:rgba(255,255,255,.8);padding:6px 8px;border-radius:4px}
/* reveal */
.js .rv{opacity:0;transform:translateY(14px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}
.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}
/* forms */
label{display:grid;gap:6px;font-size:13px;color:var(--ink-2);font-weight:500}
input,select,textarea{width:100%;background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r);padding:11px 12px;font:inherit;font-size:15px;color:var(--ink)}
input::placeholder,textarea::placeholder{color:var(--faint)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
textarea{min-height:84px;resize:vertical}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.chk{display:flex;gap:10px;align-items:flex-start;font-weight:400;color:var(--ink-2);font-size:13.5px;line-height:1.45}
.chk input{width:18px;height:18px;margin-top:2px;accent-color:var(--accent)}
.result{padding:18px 20px;border-radius:var(--r);margin-top:14px;font-size:15px;border:1px solid}
.result.ok{background:var(--ok-soft);border-color:#bfe3cf;color:#0f4d2f}
.result.no{background:var(--no-soft);border-color:#f1c4bf;color:#7a1a14}
.result.err{background:#fff6e5;border-color:#f3d9a4;color:#6b4a00}
/* footer */
footer{border-top:1px solid var(--line);padding:40px 0 64px;font-size:13px;color:var(--dim)}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
footer b{color:var(--ink);font-weight:600}
footer a:hover{color:var(--ink)}
footer .legal{margin-top:28px;max-width:80ch;line-height:1.5}
@media(max-width:860px){.links{display:none}.row2{grid-template-columns:1fr}section{padding:64px 0}footer .cols{grid-template-columns:1fr}}
/* motion layer helpers */
.motion [data-reveal]{will-change:transform,opacity}