/* ============================================================
   PSL · Face Lab — styles
   ============================================================ */

:root{
  --bg:#05060a;
  --bg-2:#0a0c14;
  --ink:#f3f5ff;
  --muted:#8b91ab;
  --muted-2:#838aa3;
  --violet:#7b5cff;
  --cyan:#22e0ff;
  --lime:#c6ff3d;
  --pink:#ff3d9a;
  --amber:#ffb020;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.055);
  --glass:rgba(255,255,255,.035);
  --radius:22px;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Space Grotesk",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --shadow:0 30px 80px -40px rgba(0,0,0,.9);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.05;letter-spacing:-.02em;font-weight:700}
p{margin:0}
::selection{background:var(--lime);color:#04120a}

/* ---------------- background ---------------- */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:
  radial-gradient(120% 80% at 50% -10%,#0d1020 0%,#05060a 60%);}
.bg-grid{
  position:absolute;inset:-2px;
  background-image:
    linear-gradient(to right,rgba(255,255,255,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(90% 65% at 50% 20%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(90% 65% at 50% 20%,#000 20%,transparent 78%);
}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;animation:drift 24s ease-in-out infinite alternate}
.blob-a{width:52vw;height:52vw;left:-14vw;top:-12vw;background:radial-gradient(circle at 30% 30%,#6b4bff,#2a1b8f 60%,transparent 70%)}
.blob-b{width:46vw;height:46vw;right:-12vw;top:8vh;background:radial-gradient(circle at 60% 40%,#0bb7ff,#0a4a8f 60%,transparent 70%);animation-delay:-8s}
.blob-c{width:40vw;height:40vw;left:28vw;bottom:-16vw;background:radial-gradient(circle at 50% 50%,#ff2e93,#7a1352 55%,transparent 70%);opacity:.34;animation-delay:-15s}
@keyframes drift{
  0%{transform:translate3d(0,0,0) scale(1)}
  100%{transform:translate3d(4vw,5vh,0) scale(1.14)}
}
.bg-noise{
  position:absolute;inset:0;opacity:.28;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/></filter><rect width='160' height='160' filter='url(%23n)' opacity='.5'/></svg>");
}

/* ---------------- nav ---------------- */
.nav{
  position:sticky;top:0;z-index:60;
  display:flex;align-items:center;gap:24px;
  padding:14px clamp(18px,4vw,48px);
  backdrop-filter:blur(18px);
  background:linear-gradient(180deg,rgba(5,6,10,.86),rgba(5,6,10,.45));
  border-bottom:1px solid var(--line-2);
}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  display:grid;place-items:center;width:38px;height:38px;border-radius:12px;
  color:#04121a;background:linear-gradient(140deg,var(--lime),var(--cyan));
  box-shadow:0 0 24px -6px rgba(34,224,255,.7);
}
.brand-text{font-weight:700;letter-spacing:.02em;font-size:17px;display:flex;gap:8px;align-items:baseline}
.brand-text em{font-style:normal;font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.18em;text-transform:uppercase}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:14px;color:var(--muted)}
.nav-links a{position:relative;padding:4px 0;transition:color .2s}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--lime);transition:right .25s}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{right:0}

.pill{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  padding:7px 13px;border-radius:999px;color:var(--muted);
  border:1px solid var(--line);background:rgba(255,255,255,.03);white-space:nowrap;
}
.pill-accent{color:#04121a;background:linear-gradient(120deg,var(--lime),#7cf5a8);border-color:transparent;font-weight:700;box-shadow:0 0 26px -8px rgba(198,255,61,.8)}
.pill-accent.is-empty{background:rgba(255,255,255,.05);color:var(--muted-2);box-shadow:none;border-color:var(--line)}
.pill-warn{color:#150a02;background:linear-gradient(120deg,var(--amber),#ffd66b);border-color:transparent;font-weight:700}
.dot{width:7px;height:7px;border-radius:50%;background:var(--lime);box-shadow:0 0 10px var(--lime);animation:pulse 1.8s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.7)}}

/* ---------------- shared ---------------- */
main{max-width:1240px;margin:0 auto;padding:0 clamp(18px,4vw,48px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);
}
.grad{
  background:linear-gradient(100deg,var(--violet) 0%,var(--cyan) 45%,var(--lime) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  background-size:200% 100%;animation:slide 7s ease-in-out infinite alternate;
}
@keyframes slide{to{background-position:100% 0}}
.section-head{margin-bottom:38px;max-width:760px}
.section-head h2{font-size:clamp(30px,4.4vw,52px);margin-top:14px}
.section-sub{color:var(--muted);margin-top:16px;font-size:17px;max-width:64ch}
.panel{
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow), inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(16px);
}
.card{
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
  border:1px solid var(--line);border-radius:18px;padding:26px;
  transition:transform .3s cubic-bezier(.2,.8,.2,1),border-color .3s,box-shadow .3s;
}
.card:hover{transform:translateY(-6px);border-color:rgba(198,255,61,.34);box-shadow:0 26px 50px -34px rgba(198,255,61,.55)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 24px;border-radius:14px;border:1px solid transparent;
  font-weight:600;font-size:15px;cursor:pointer;letter-spacing:-.01em;
  transition:transform .18s,box-shadow .25s,background .25s,border-color .25s;
}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-primary{
  color:#04121a;background:linear-gradient(120deg,var(--lime),var(--cyan) 65%,var(--violet));
  box-shadow:0 14px 40px -18px rgba(34,224,255,.9);
  font-weight:700;
}
.btn-primary:hover{box-shadow:0 18px 46px -14px rgba(198,255,61,.75);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:rgba(255,255,255,.28);background:rgba(255,255,255,.08)}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn-sm{padding:10px 16px;font-size:13px;border-radius:11px}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------------- hero ---------------- */
.hero{
  display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(28px,4vw,56px);
  align-items:start;padding:clamp(46px,7vw,86px) 0 40px;
}
.hero-copy h1{
  font-size:clamp(48px,7.4vw,92px);
  margin:20px 0 22px;letter-spacing:-.045em;
}
.lede{color:var(--muted);font-size:clamp(16px,1.35vw,19px);max-width:52ch}
.lede strong{color:var(--ink);font-weight:600}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin:32px 0 34px}
.hero-stats{
  list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:12px;padding:20px 0 0;margin:0;border-top:1px solid var(--line-2);
}
.hero-stats li{display:flex;flex-direction:column;gap:2px}
.hero-stats b{font-family:var(--mono);font-size:clamp(22px,2.4vw,30px);letter-spacing:-.03em}
.hero-stats span{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted-2)}

/* ---------------- scanner ---------------- */
.hero-scan{scroll-margin-top:92px}
.scan-card{padding:20px;position:relative;overflow:hidden}
.scan-card::before{
  content:"";position:absolute;inset:-1px;border-radius:inherit;pointer-events:none;
  background:radial-gradient(120% 90% at 90% -10%,rgba(34,224,255,.20),transparent 55%),
             radial-gradient(80% 60% at 10% 110%,rgba(123,92,255,.22),transparent 60%);
}
.panel-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:16px;position:relative}
.view[hidden]{display:none !important}
.panel-foot{
  position:relative;margin-top:14px;font-family:var(--mono);font-size:10.5px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);text-align:center;
}
.view{position:relative}

/* dropzone */
.drop{
  position:relative;display:grid;place-items:center;text-align:center;
  min-height:330px;padding:34px 22px;border-radius:18px;cursor:pointer;
  border:1.5px dashed rgba(255,255,255,.20);
  background:
    radial-gradient(70% 60% at 50% 30%,rgba(34,224,255,.10),transparent 70%),
    rgba(255,255,255,.022);
  transition:border-color .25s,background .25s,transform .25s;
  outline:none;
}
.drop:hover,.drop:focus-visible,.drop.is-over{
  border-color:var(--lime);
  background:radial-gradient(70% 60% at 50% 30%,rgba(198,255,61,.16),transparent 70%),rgba(255,255,255,.04);
  transform:translateY(-3px);
}
.drop-rings{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}
.drop-rings i{
  position:absolute;border:1px solid rgba(34,224,255,.22);border-radius:50%;
  animation:ripple 3.6s ease-out infinite;
}
.drop-rings i:nth-child(1){width:150px;height:150px}
.drop-rings i:nth-child(2){width:230px;height:230px;animation-delay:1.2s}
.drop-rings i:nth-child(3){width:320px;height:320px;animation-delay:2.4s}
@keyframes ripple{0%{opacity:.75;transform:scale(.72)}70%{opacity:.12}100%{opacity:0;transform:scale(1.12)}}
.drop-icon{
  position:relative;width:74px;height:74px;border-radius:24px;display:grid;place-items:center;
  color:var(--cyan);background:rgba(34,224,255,.10);border:1px solid rgba(34,224,255,.35);
  box-shadow:0 0 46px -14px rgba(34,224,255,.9);margin-bottom:18px;
}
.drop-title{position:relative;font-size:22px;font-weight:700;letter-spacing:-.02em}
.drop-sub{position:relative;margin-top:8px;color:var(--muted);font-size:14px;line-height:1.7}
.drop-sub u{text-decoration-thickness:1px;text-underline-offset:3px;color:var(--ink)}
.privacy{margin-top:14px;text-align:center;font-family:var(--mono);font-size:11px;color:var(--muted-2);letter-spacing:.05em}
.privacy b{color:var(--lime)}
.sample-line{margin-top:10px;text-align:center;font-size:13px;color:var(--muted)}
.link-btn{
  background:none;border:0;padding:0;cursor:pointer;font-size:13px;color:var(--cyan);
  text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;
}
.link-btn:hover{color:var(--lime)}

/* busy */
[data-view="busy"]{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:stretch}
.shot{position:relative;border-radius:16px;overflow:hidden;background:#08090f;min-height:300px;border:1px solid var(--line)}
.shot img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.shot canvas{position:absolute;inset:0;width:100%;height:100%}
.laser{
  position:absolute;left:0;right:0;height:34%;pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(198,255,61,.16) 45%,rgba(198,255,61,.85) 50%,rgba(198,255,61,.16) 55%,transparent);
  mix-blend-mode:screen;animation:laser 2.1s cubic-bezier(.45,0,.55,1) infinite;
}
@keyframes laser{0%{top:-34%}100%{top:100%}}
.busy-side{display:flex;flex-direction:column;justify-content:center;gap:16px}
.busy-title{font-size:20px;font-weight:700;letter-spacing:-.02em}
.busy-title b{
  display:block;font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan);font-weight:500;margin-top:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:9px;font-family:var(--mono);font-size:12px;color:var(--muted-2)}
.steps li{display:flex;align-items:center;gap:10px;transition:color .3s}
.steps li::before{
  content:"";width:8px;height:8px;border-radius:2px;background:rgba(255,255,255,.16);transition:.3s;flex:none;
}
.steps li.is-active{color:var(--ink)}
.steps li.is-active::before{background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.steps li.is-done{color:var(--muted)}
.steps li.is-done::before{background:var(--lime);box-shadow:0 0 10px rgba(198,255,61,.8)}
.bar{height:5px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden}
.bar i{display:block;height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--cyan),var(--lime));transition:width .35s ease;box-shadow:0 0 16px rgba(198,255,61,.7)}

/* result */
.result-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:18px}
.shot-result{min-height:340px}
.shot-tag{
  position:absolute;left:12px;bottom:12px;z-index:2;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  padding:6px 11px;border-radius:999px;background:rgba(4,6,12,.72);border:1px solid var(--line);color:var(--cyan);
  backdrop-filter:blur(8px);
}
.scores{display:flex;flex-direction:column;gap:16px;justify-content:center;padding:4px 2px}
.ring-wrap{position:relative;width:172px;height:172px;margin-inline:auto}
.ring{width:100%;height:100%;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:9;stroke-linecap:round}
.ring-bg{stroke:rgba(255,255,255,.08)}
.ring-fg{
  stroke:url(#ringGrad);stroke-dasharray:326.7;stroke-dashoffset:326.7;
  transition:stroke-dashoffset 1.4s cubic-bezier(.2,.8,.2,1);
  filter:drop-shadow(0 0 8px rgba(198,255,61,.75));
}
.ring-num{
  position:absolute;inset:0;display:grid;place-content:center;text-align:center;
}
.ring-num b{font-family:var(--mono);font-size:46px;letter-spacing:-.05em;line-height:1}
.ring-num span{font-family:var(--mono);font-size:10px;letter-spacing:.34em;color:var(--muted);text-transform:uppercase}
.grade-box{display:flex;align-items:center;gap:16px;justify-content:center}
.grade{
  font-family:var(--mono);font-weight:700;font-size:44px;line-height:1;
  width:74px;height:74px;display:grid;place-items:center;border-radius:20px;
  background:linear-gradient(140deg,rgba(198,255,61,.2),rgba(34,224,255,.14));
  border:1px solid rgba(198,255,61,.45);color:var(--lime);
  box-shadow:0 0 44px -16px rgba(198,255,61,.9);
}
.grade-label{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.grade-head{font-size:17px;font-weight:600;margin-top:4px;letter-spacing:-.01em}
.summary{font-size:13.5px;color:var(--muted);text-align:center;line-height:1.6;border-top:1px solid var(--line-2);padding-top:14px}
.readouts{
  font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--cyan);
  text-align:center;margin-top:10px;min-height:15px;
}
.model-line{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:var(--muted-2);
  text-align:center;margin-top:5px;min-height:14px;
}

.bars{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px}
.bar-row{background:rgba(255,255,255,.03);border:1px solid var(--line-2);border-radius:14px;padding:13px 15px;transition:border-color .3s}
.bar-row:hover{border-color:rgba(34,224,255,.35)}
.bar-row .row-top{display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.bar-row .name{font-weight:600;font-size:14.5px}
.bar-row .val{font-family:var(--mono);font-size:17px;letter-spacing:-.02em}
.bar-row .val em{font-style:normal;font-size:10px;color:var(--muted-2);margin-left:5px;letter-spacing:.1em}
.track{height:6px;border-radius:99px;background:rgba(255,255,255,.08);margin:10px 0 8px;overflow:hidden}
.track i{
  display:block;height:100%;width:0;border-radius:99px;
  background:linear-gradient(90deg,var(--violet),var(--cyan) 60%,var(--lime));
  box-shadow:0 0 14px rgba(34,224,255,.55);
  transition:width 1s cubic-bezier(.2,.8,.2,1);
}
.bar-row .note{font-family:var(--mono);font-size:10.5px;color:var(--muted-2);letter-spacing:.02em}
.bar-row .weight{font-family:var(--mono);font-size:9.5px;color:var(--muted-2);letter-spacing:.14em;text-transform:uppercase}

.result-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.result-actions .btn{flex:1 1 auto}

/* error */
.err{text-align:center;padding:34px 18px;display:grid;justify-items:center;gap:12px}
.err-icon{
  width:64px;height:64px;border-radius:22px;display:grid;place-items:center;
  font-family:var(--mono);font-size:30px;font-weight:700;color:#0a0610;
  background:linear-gradient(140deg,var(--pink),var(--amber));
  box-shadow:0 0 46px -14px rgba(255,61,154,.9);
}
.err-title{font-size:22px;font-weight:700}
.err-text{color:var(--muted);max-width:44ch;font-size:14.5px}

/* ---------------- how ---------------- */
.how,.metrics,.faq{padding:clamp(60px,9vw,120px) 0 0;scroll-margin-top:80px}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step-num{
  font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--lime);
  display:block;margin-bottom:16px;
}
.step h3{font-size:20px;margin-bottom:10px}
.step p{color:var(--muted);font-size:14.5px}

/* ---------------- metrics ---------------- */
.metric-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px}
.metric{position:relative;overflow:hidden}
.metric::after{
  content:attr(data-i);position:absolute;right:16px;top:8px;
  font-family:var(--mono);font-size:64px;font-weight:700;color:rgba(255,255,255,.05);letter-spacing:-.05em;
}
.metric h3{font-size:19px;margin-bottom:8px;display:flex;align-items:center;gap:10px}
.metric .w{font-family:var(--mono);font-size:10px;letter-spacing:.12em;padding:4px 8px;border-radius:6px;background:rgba(198,255,61,.14);color:var(--lime);border:1px solid rgba(198,255,61,.3)}
.metric p{color:var(--muted);font-size:14px}
.metric .chip{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.metric .chip span{font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--muted-2);border:1px solid var(--line-2);padding:5px 9px;border-radius:999px}

/* ---------------- faq ---------------- */
.faq-list{display:grid;gap:12px;max-width:860px}
details{
  background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:16px;
  padding:18px 22px;transition:border-color .25s,background .25s;
}
details[open]{border-color:rgba(34,224,255,.35);background:rgba(255,255,255,.045)}
summary{
  cursor:pointer;font-weight:600;font-size:16.5px;list-style:none;
  display:flex;justify-content:space-between;gap:16px;align-items:center;letter-spacing:-.01em;
}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:var(--mono);color:var(--lime);font-size:20px;transition:transform .25s}
details[open] summary::after{transform:rotate(45deg)}
details p{color:var(--muted);font-size:14.5px;margin-top:12px;max-width:70ch}

/* ---------------- footer ---------------- */
.footer{
  max-width:1240px;margin:clamp(70px,10vw,130px) auto 0;
  padding:44px clamp(18px,4vw,48px) 54px;
  border-top:1px solid var(--line-2);
  display:grid;grid-template-columns:1.3fr 2fr;gap:36px;
}
.footer-brand p{color:var(--muted-2);font-size:13.5px;margin-top:14px;max-width:42ch}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.footer-cols h3{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted-2);margin-bottom:14px;font-weight:500}
.footer-cols a,.footer-cols span{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:color .2s}
.footer-cols a:hover{color:var(--lime)}
.status{display:flex;align-items:center;gap:8px}
.copyright{
  grid-column:1/-1;border-top:1px solid var(--line-2);padding-top:22px;
  font-family:var(--mono);font-size:11px;color:var(--muted-2);letter-spacing:.04em;
}

/* toast */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%);z-index:120;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.05em;
  padding:13px 20px;border-radius:999px;background:rgba(10,12,20,.94);
  border:1px solid rgba(198,255,61,.4);color:var(--lime);
  box-shadow:0 20px 50px -20px rgba(0,0,0,.9);animation:toastIn .3s cubic-bezier(.2,.9,.3,1.2);
}
@keyframes toastIn{from{opacity:0;transform:translate(-50%,14px)}to{opacity:1;transform:translate(-50%,0)}}

/* ================= model switcher ================= */
.model-switch{
  display:inline-flex;gap:4px;padding:4px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
}
.model-switch button{
  appearance:none;border:0;background:transparent;cursor:pointer;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;
  padding:7px 13px;border-radius:999px;color:var(--muted);
  transition:color .25s,background .25s,box-shadow .25s;
}
.model-switch button:hover{color:var(--ink)}
.model-switch button.is-active{
  color:#04121a;font-weight:700;background:linear-gradient(120deg,var(--lime),var(--cyan));
  box-shadow:0 0 20px -6px rgba(198,255,61,.85);
}

/* ================= entrance + ambient animation ================= */
.hero-copy>*{animation:rise .85s cubic-bezier(.2,.8,.2,1) both}
.hero-copy>*:nth-child(1){animation-delay:.02s}
.hero-copy>*:nth-child(2){animation-delay:.12s}
.hero-copy>*:nth-child(3){animation-delay:.22s}
.hero-copy>*:nth-child(4){animation-delay:.32s}
.hero-copy>*:nth-child(5){animation-delay:.42s}
.hero-scan{animation:rise .85s .2s cubic-bezier(.2,.8,.2,1) both}
@keyframes rise{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}

.nav.is-scrolled{box-shadow:0 18px 44px -26px rgba(0,0,0,.95);border-bottom-color:rgba(255,255,255,.07)}

@property --a{syntax:"<angle>";initial-value:0deg;inherits:false}
.drop::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1.6px;pointer-events:none;
  background:conic-gradient(from var(--a,0deg),rgba(34,224,255,.85),transparent 32%,transparent 58%,rgba(198,255,61,.85));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  animation:spin-border 7s linear infinite;opacity:.6;
}
@keyframes spin-border{to{--a:360deg}}
.drop.is-over::before{opacity:1;animation-duration:1.6s}

.particles{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.particles i{
  position:absolute;width:4px;height:4px;border-radius:50%;
  background:var(--cyan);opacity:.35;filter:blur(1px);
  animation:float 11s ease-in-out infinite;
}
.particles i:nth-child(3n){background:var(--lime)}
.particles i:nth-child(4n){background:var(--violet)}
@keyframes float{
  0%,100%{transform:translate3d(0,0,0)}
  33%{transform:translate3d(14px,-22px,0)}
  66%{transform:translate3d(-12px,-10px,0)}
}

/* ================= result animations ================= */
.grade{animation:grade-pop .55s cubic-bezier(.2,.9,.3,1.45) both;animation-delay:.3s}
@keyframes grade-pop{from{opacity:0;transform:scale(.35) rotate(-14deg)}to{opacity:1;transform:none}}
.readouts{animation:fade-in .6s ease both;animation-delay:.7s}
@keyframes fade-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.model-line{animation:fade-in .6s ease both;animation-delay:.85s}
.summary.is-typing::after{content:"▍";color:var(--lime);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* shimmer sweep across feature bars */
.track i{position:relative;overflow:hidden}
.track i::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.5),transparent);
  transform:translateX(-100%);animation:shimmer 2.4s ease-in-out infinite;
}
@keyframes shimmer{55%,100%{transform:translateX(100%)}}

/* shine sweep on primary buttons */
.btn-primary{position:relative;overflow:hidden}
.btn-primary::after{
  content:"";position:absolute;top:0;bottom:0;width:42%;left:-70%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.8),transparent);
  transform:skewX(-18deg);
}
.btn-primary:hover::after{animation:shine .9s ease}
.btn-primary:active::after{display:none}
@keyframes shine{to{left:140%}}

/* staggered card reveals */
.reveal{transition-delay:calc(var(--i,0)*70ms)}

/* ---------------- responsive ---------------- */
@media (max-width:1040px){
  .hero{grid-template-columns:1fr;padding-top:44px}
  .hero-copy h1{font-size:clamp(44px,11vw,74px)}
  .steps-grid{grid-template-columns:1fr}
  .footer{grid-template-columns:1fr}
}
@media (max-width:760px){
  .nav-links{display:none}
  [data-view="busy"],.result-grid{grid-template-columns:1fr}
  .bars{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:16px}
  .shot{min-height:280px}
  .footer-cols{grid-template-columns:1fr 1fr}
  .result-actions .btn{flex:1 1 100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}