/* medsight.io — premium dark medical-AI marketing site */
:root{
  --bg:#05070d; --bg2:#0a0f1c; --panel:rgba(255,255,255,.035);
  --ink:#eaf0ff; --mut:#93a1c4; --dim:#5d6a8a;
  --a1:#38e1ff; --a2:#4f7cff; --a3:#9a6bff; --a4:#22d3a6;
  --line:rgba(255,255,255,.09); --line2:rgba(255,255,255,.05);
  --glow:0 0 60px rgba(79,124,255,.45), 0 0 120px rgba(154,107,255,.22);
  --radius:20px; --maxw:1160px;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font:16px/1.65 var(--font); -webkit-font-smoothing:antialiased;
  overflow-x:hidden; min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
h1,h2,h3{letter-spacing:-.02em;line-height:1.1;margin:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--a1)}
.grad{background:linear-gradient(100deg,var(--a1),var(--a2) 45%,var(--a3));-webkit-background-clip:text;background-clip:text;color:transparent}
.mut{color:var(--mut)}

/* ── ambient background ──────────────────────────────────────────────────── */
#bg-canvas{position:fixed;inset:0;z-index:0;pointer-events:none}
.aurora{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.aurora::before,.aurora::after{content:"";position:absolute;width:70vw;height:70vw;border-radius:50%;filter:blur(90px);opacity:.35}
.aurora::before{top:-20vw;left:-10vw;background:radial-gradient(circle,var(--a2),transparent 60%)}
.aurora::after{bottom:-25vw;right:-15vw;background:radial-gradient(circle,var(--a3),transparent 60%);opacity:.28}
.site{position:relative;z-index:1}

/* ── buttons ─────────────────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 22px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:transform .15s ease,box-shadow .2s ease,background .2s ease;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{color:#fff;background:linear-gradient(180deg,var(--a2),#3a5fe6);box-shadow:0 10px 34px rgba(79,124,255,.42)}
.btn-primary:hover{box-shadow:0 14px 44px rgba(79,124,255,.6);transform:translateY(-2px)}
.btn-glow{color:#04121a;background:linear-gradient(120deg,var(--a1),#59e6b8);box-shadow:0 10px 34px rgba(56,225,255,.35)}
.btn-glow:hover{transform:translateY(-2px);box-shadow:0 14px 48px rgba(56,225,255,.55)}
.btn-ghost{color:var(--ink);background:var(--panel);border-color:var(--line)}
.btn-ghost:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.2)}
.btn-sm{padding:9px 16px;font-size:14px}

/* ── nav ─────────────────────────────────────────────────────────────────── */
header.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(5,7,13,.55);border-bottom:1px solid var(--line2)}
.nav-in{display:flex;align-items:center;gap:20px;height:66px}
.logo{display:flex;align-items:center;gap:11px;font-weight:700;font-size:19px}
.logo .dot{width:26px;height:26px;border-radius:50%;background:radial-gradient(circle at 34% 30%,#bfe9ff,var(--a1) 26%,var(--a2) 58%,var(--a3) 92%);box-shadow:0 0 18px rgba(79,124,255,.7)}
.nav-links{display:flex;gap:26px;margin-left:14px;font-size:15px;color:var(--mut)}
.nav-links a:hover{color:var(--ink)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
#nav-user{display:none;align-items:center;gap:10px;font-size:14px;color:var(--mut)}
.nav-toggle{display:none}

/* ── hero ────────────────────────────────────────────────────────────────── */
.hero{position:relative;padding:74px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:center}
.hero h1{font-size:clamp(38px,6vw,68px);font-weight:800;margin:18px 0 0}
.hero .lead{font-size:clamp(17px,2.1vw,21px);color:var(--mut);max-width:560px;margin:20px 0 30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;background:var(--panel);border:1px solid var(--line);font-size:13.5px;color:var(--mut)}
.pill .live{width:8px;height:8px;border-radius:50%;background:var(--a4);box-shadow:0 0 10px var(--a4);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

/* hero 3D stage */
.stage{position:relative;aspect-ratio:1/1;max-width:520px;margin-left:auto;width:100%}
#hero-canvas{width:100%;height:100%;display:block;cursor:grab}
#hero-canvas:active{cursor:grabbing}
.stage-badge{position:absolute;padding:10px 14px;border-radius:14px;background:rgba(10,15,28,.72);border:1px solid var(--line);backdrop-filter:blur(8px);font-size:13px;box-shadow:0 12px 30px rgba(0,0,0,.35);animation:float 6s ease-in-out infinite}
.stage-badge b{display:block;font-size:15px;color:var(--ink)}
.stage-badge span{color:var(--mut)}
.sb1{top:6%;left:-4%;animation-delay:0s}
.sb2{bottom:12%;right:-6%;animation-delay:-3s}
.sb3{bottom:34%;left:-8%;animation-delay:-1.5s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ── section shell ───────────────────────────────────────────────────────── */
section{padding:70px 0;position:relative}
.sec-head{max-width:640px;margin:0 auto 46px;text-align:center}
.sec-head h2{font-size:clamp(28px,4vw,42px);font-weight:800;margin:14px 0 12px}
.sec-head p{color:var(--mut);font-size:17px;margin:0}

/* trust strip */
.trust{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;padding:26px 0 0}
.trust .chip{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--mut);padding:9px 16px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.trust .chip b{color:var(--ink);font-weight:600}

/* ── model cards ─────────────────────────────────────────────────────────── */
.models{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.mcard{position:relative;border:1px solid var(--line);border-radius:24px;padding:30px;background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.015));overflow:hidden;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;transform-style:preserve-3d}
.mcard:hover{border-color:rgba(120,150,255,.4);box-shadow:0 24px 60px rgba(0,0,0,.4)}
.mcard::before{content:"";position:absolute;top:-40%;right:-30%;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(79,124,255,.25),transparent 62%);pointer-events:none}
.mcard .ic{font-size:34px}
.mcard .kind{font-size:12.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--a1);margin-top:12px}
.mcard h3{font-size:25px;font-weight:750;margin:6px 0 8px}
.mcard .tl{color:var(--mut);margin:0 0 18px;font-size:15.5px}
.mcard ul{list-style:none;padding:0;margin:0 0 20px;display:grid;gap:10px}
.mcard li{display:flex;gap:10px;font-size:14.5px;color:#cdd7f0}
.mcard li::before{content:"";flex:0 0 18px;height:18px;margin-top:2px;border-radius:50%;background:radial-gradient(circle at 40% 35%,#bfe9ff,var(--a2));box-shadow:0 0 10px rgba(79,124,255,.6)}
.mcard .foot{display:flex;align-items:center;justify-content:space-between;gap:14px;border-top:1px solid var(--line2);padding-top:16px}
.mcard .stat b{font-size:24px;font-weight:800;background:linear-gradient(100deg,var(--a1),var(--a3));-webkit-background-clip:text;background-clip:text;color:transparent}
.mcard .stat span{display:block;font-size:12.5px;color:var(--dim)}
.tasks{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.tasks .t{font-size:12px;padding:5px 11px;border-radius:999px;background:rgba(56,225,255,.1);border:1px solid rgba(56,225,255,.25);color:#a9ecff;text-transform:capitalize}

/* ── how it works ────────────────────────────────────────────────────────── */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.step{border:1px solid var(--line);border-radius:20px;padding:26px;background:var(--panel);position:relative}
.step .n{counter-increment:s;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-weight:800;color:#04121a;background:linear-gradient(120deg,var(--a1),var(--a2));margin-bottom:14px}
.step .n::before{content:counter(s)}
.step h4{margin:0 0 6px;font-size:18px}
.step p{margin:0;color:var(--mut);font-size:14.5px}

/* ── updates timeline ────────────────────────────────────────────────────── */
.timeline{max-width:760px;margin:0 auto;position:relative;padding-left:28px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--a1),var(--a3),transparent)}
.tl-item{position:relative;padding:0 0 26px 8px}
.tl-item::before{content:"";position:absolute;left:-28px;top:6px;width:16px;height:16px;border-radius:50%;background:var(--bg);border:3px solid var(--a2);box-shadow:0 0 14px rgba(79,124,255,.7)}
.tl-item .meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--dim);margin-bottom:4px}
.tl-item .tg{padding:2px 9px;border-radius:999px;background:rgba(154,107,255,.14);border:1px solid rgba(154,107,255,.3);color:#c9b6ff;font-weight:600}
.tl-item h4{font-size:17px;margin:0 0 4px}
.tl-item p{margin:0;color:var(--mut);font-size:14.5px}

/* ── security cards ──────────────────────────────────────────────────────── */
.sec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scard{border:1px solid var(--line);border-radius:20px;padding:26px;background:var(--panel)}
.scard .si{font-size:26px;margin-bottom:12px}
.scard h4{margin:0 0 8px;font-size:18px}
.scard p{margin:0;color:var(--mut);font-size:14.5px}

/* ── final CTA ───────────────────────────────────────────────────────────── */
.cta-band{position:relative;border:1px solid var(--line);border-radius:28px;padding:56px 34px;text-align:center;overflow:hidden;background:linear-gradient(120deg,rgba(79,124,255,.16),rgba(154,107,255,.14))}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 50% -20%,rgba(56,225,255,.25),transparent 70%)}
.cta-band h2{position:relative;font-size:clamp(28px,4.4vw,44px);font-weight:800;margin:0 0 14px}
.cta-band p{position:relative;color:var(--mut);max-width:560px;margin:0 auto 26px;font-size:17px}
.cta-band .btn{position:relative}

/* ── footer ──────────────────────────────────────────────────────────────── */
footer{border-top:1px solid var(--line2);padding:44px 0 60px;margin-top:20px}
.foot-in{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:flex-start}
.foot-in .logo{margin-bottom:10px}
.foot-cols{display:flex;gap:60px;flex-wrap:wrap}
.foot-col h5{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin:0 0 12px}
.foot-col a{display:block;color:var(--mut);font-size:14.5px;margin-bottom:9px}
.foot-col a:hover{color:var(--ink)}
.disclaimer{margin-top:34px;padding-top:22px;border-top:1px solid var(--line2);color:var(--dim);font-size:13px;max-width:760px}

/* ── auth modal ──────────────────────────────────────────────────────────── */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:20px;background:rgba(3,5,10,.72);backdrop-filter:blur(6px)}
.modal.open{display:flex}
.modal-card{width:100%;max-width:420px;border:1px solid var(--line);border-radius:24px;padding:30px;background:linear-gradient(180deg,#0c1220,#080c16);box-shadow:0 40px 100px rgba(0,0,0,.6);position:relative}
.modal-card .x{position:absolute;top:16px;right:16px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;cursor:pointer;color:var(--mut);background:var(--panel);border:1px solid var(--line)}
.modal-card .x:hover{color:var(--ink)}
.modal-card .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;margin-bottom:6px}
.modal-card .brand .dot{width:22px;height:22px;border-radius:50%;background:radial-gradient(circle at 34% 30%,#bfe9ff,var(--a1) 26%,var(--a2) 58%,var(--a3) 92%)}
.tabs{display:flex;gap:6px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:5px;margin:18px 0 20px}
.tabs button{flex:1;padding:9px;border:0;border-radius:8px;background:transparent;color:var(--mut);font-weight:600;font-size:14px;cursor:pointer}
.tabs button.active{background:linear-gradient(180deg,var(--a2),#3a5fe6);color:#fff}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--mut);margin-bottom:6px}
.field input{width:100%;padding:12px 14px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--ink);font-size:15px;font-family:inherit}
.field input:focus{outline:none;border-color:var(--a2);box-shadow:0 0 0 3px rgba(79,124,255,.2)}
.modal .btn{width:100%;justify-content:center;margin-top:4px}
.msg{font-size:13.5px;margin:12px 0 0;min-height:18px;text-align:center}
.msg.err{color:#ff8a9b}.msg.ok{color:var(--a4)}
.hide{display:none!important}
.mrow{text-align:center;font-size:13.5px;color:var(--dim);margin-top:16px}
.mrow a{color:var(--a1);cursor:pointer}

/* ── reveal ──────────────────────────────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ── responsive ──────────────────────────────────────────────────────────── */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:20px}
  .stage{max-width:400px;margin:0 auto}
  .models,.steps,.sec-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-links.open{display:flex;position:absolute;top:66px;left:0;right:0;flex-direction:column;gap:0;background:rgba(8,12,22,.97);border-bottom:1px solid var(--line);padding:8px 22px 16px}
  .nav-links.open a{padding:11px 0;border-bottom:1px solid var(--line2)}
  .nav-toggle{display:grid;place-items:center;width:40px;height:40px;border-radius:10px;background:var(--panel);border:1px solid var(--line);color:var(--ink);cursor:pointer;font-size:18px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}