:root{--ink:#0A2540;--muted:#566B7D;--teal:#0E9F9A;--teal-d:#0A7C82;--azure:#2D7FF9;--aqua:#DDF6F4;--rose:#E85D8A;--bg:#F1F8FA;--line:#D8E7EC;--card:rgba(255,255,255,.86);--r:24px;--ease:cubic-bezier(.2,.7,.2,1);color-scheme:light}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink);font:400 17px/1.55 "Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
.bg{position:fixed;inset:0;overflow:hidden;z-index:-1}
.bg i{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;animation:drift 18s ease-in-out infinite alternate}
.bg i:nth-child(1){width:46vmax;height:46vmax;left:-12vmax;top:-14vmax;background:#9EE6DF}
.bg i:nth-child(2){width:38vmax;height:38vmax;right:-10vmax;top:10vh;background:#BBD5FF;animation-delay:-6s}
.bg i:nth-child(3){width:30vmax;height:30vmax;left:30vw;bottom:-14vmax;background:#FFD0DE;animation-delay:-11s}
@keyframes drift{to{transform:translate3d(6vmax,4vmax,0) scale(1.12)}}
svg.i{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
/* header */
.hdr{position:sticky;top:0;z-index:20;padding-top:env(safe-area-inset-top,0px);background:rgba(241,248,250,.8);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{max-width:1080px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.01em}
.mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--teal),var(--azure));box-shadow:0 6px 16px rgba(14,159,154,.35)}
.steps{display:flex;gap:6px;list-style:none;margin:0;padding:0}
.steps li{display:flex;align-items:center;gap:8px;padding:4px 12px 4px 4px;border-radius:999px;font-size:13.5px;font-weight:600;color:var(--muted);transition:background .3s,color .3s}
.steps b{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:12px;background:var(--line);color:var(--muted);transition:all .3s}
.steps li{padding-right:4px}.steps span{display:none}
.steps li.cur{background:#fff;color:var(--ink);box-shadow:0 2px 10px rgba(10,37,64,.08);padding-right:12px}
.steps li.cur span{display:inline}
.steps li.cur b,.steps li.done b{background:var(--teal);color:#fff}
@media(min-width:900px){.steps li{padding-right:12px}.steps span{display:inline}}
.banner{display:flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(90deg,#FFF1D1,#FFE3B0);color:#6A4300;font-weight:700;font-size:14.5px;padding:8px 14px;border-top:1px solid #F0C979;animation:fade .4s both}
.banner[hidden]{display:none}
.prog i{display:block;height:3px;width:0;background:linear-gradient(90deg,var(--teal),var(--azure));transition:width .6s var(--ease)}
/* layout + motion */
.app{max-width:1080px;margin:0 auto;padding:26px 20px calc(40px + env(safe-area-inset-bottom,0px))}
.screen{display:none}.screen.active{display:block}
.rise{animation:rise .7s var(--ease) both;animation-delay:calc(var(--i,0)*80ms)}
@keyframes rise{from{opacity:0;transform:translateY(22px) scale(.985)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}}
h1,h2,h3{margin:0;letter-spacing:-.02em;line-height:1.1}
h2{font-size:clamp(28px,4vw,40px);font-weight:800;margin-bottom:10px}
h3{font-size:18px;font-weight:700;margin-bottom:6px}
p{margin:0 0 12px}.muted{color:var(--muted)}
/* hero */
.hero{position:relative;overflow:hidden;display:grid;gap:24px;align-items:center;border-radius:32px;padding:34px 26px;color:#fff;background:radial-gradient(120% 140% at 0% 0%,#0E9F9A 0%,#0A5F7A 45%,#0A2540 100%);box-shadow:0 30px 60px -24px rgba(10,37,64,.55)}
.hero::before{content:"";position:absolute;width:380px;height:380px;right:-80px;top:-120px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 65%);animation:drift 12s ease-in-out infinite alternate}
.hero>*{position:relative}
.hero h1{font-size:clamp(52px,9vw,96px);font-weight:800;margin:14px 0 10px}
.lead{font-size:clamp(20px,2.6vw,26px);font-weight:600;line-height:1.3;max-width:20ch}
.sub{color:rgba(255,255,255,.82);max-width:46ch}
.hero-art{max-width:420px;margin:0 auto;width:100%}
@media(min-width:860px){.hero{grid-template-columns:1.1fr .9fr;padding:56px 52px}}
.chip{display:inline-flex;align-items:center;gap:8px;padding:6px 14px 6px 10px;border-radius:999px;font-size:14px;font-weight:700;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3)}
/* buttons */
.btn{position:relative;overflow:hidden;appearance:none;border:0;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:14px 28px;border-radius:16px;font:700 17px "Plus Jakarta Sans",system-ui,sans-serif;color:#fff;background:linear-gradient(135deg,var(--teal),var(--azure));box-shadow:0 12px 24px -8px rgba(14,159,154,.55);transition:transform .25s var(--ease),box-shadow .25s,filter .25s}
.btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 18px 30px -10px rgba(14,159,154,.65);filter:saturate(1.15)}
.btn:active:not(:disabled){transform:scale(.98)}
.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.btn.big{overflow:visible;margin-top:10px;padding:16px 36px;background:#fff;color:var(--ink);box-shadow:0 14px 30px -10px rgba(0,0,0,.5)}
.btn.big::after{content:"";position:absolute;inset:0;border-radius:inherit;animation:ring 2.4s infinite}
@keyframes ring{0%{box-shadow:0 0 0 0 rgba(255,255,255,.7)}70%,100%{box-shadow:0 0 0 18px rgba(255,255,255,0)}}
.btn.ghost{background:#fff;color:var(--teal-d);box-shadow:inset 0 0 0 2px var(--teal)}
.btn.wide{width:100%}
:focus-visible{outline:3px solid var(--azure);outline-offset:3px}
/* cards */
.bento,.trio{display:grid;gap:16px;margin-top:20px}
@media(min-width:760px){.bento,.trio{grid-template-columns:repeat(3,1fr)}}
.tile,.card{background:var(--card);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.9);border-radius:var(--r);padding:22px;box-shadow:0 1px 2px rgba(10,37,64,.05),0 16px 32px -18px rgba(10,37,64,.28);transition:transform .3s var(--ease),box-shadow .3s}
.tile:hover{transform:translateY(-5px);box-shadow:0 1px 2px rgba(10,37,64,.05),0 26px 40px -18px rgba(10,37,64,.35)}
.tile p,.card p{color:var(--muted);margin:0}
.ico{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;color:var(--teal-d);background:var(--aqua)}
.ico.b{color:var(--azure);background:#E3EEFF}.ico.r{color:var(--rose);background:#FFE6EE}
.ico svg{width:24px;height:24px}
.grid{display:grid;gap:18px;margin:22px 0}
@media(min-width:700px){.grid{grid-template-columns:repeat(3,1fr)}}
.sample{appearance:none;text-align:left;font:inherit;color:inherit;cursor:pointer;padding:10px;border-radius:28px;background:var(--card);border:2px solid transparent;box-shadow:0 16px 32px -18px rgba(10,37,64,.35);transition:transform .35s var(--ease),box-shadow .35s,border-color .25s}
.sample:hover{transform:translateY(-6px) rotate(-.5deg)}
.sample[aria-pressed="true"]{border-color:var(--teal);box-shadow:0 0 0 6px rgba(14,159,154,.15),0 24px 40px -20px rgba(14,159,154,.6)}
.meta{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 6px 4px;font-weight:700}
.chk{width:26px;height:26px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-size:13px;color:transparent;transition:all .3s var(--ease);flex:none}
.sample[aria-pressed="true"] .chk{background:var(--teal);border-color:var(--teal);color:#fff;transform:scale(1.15)}
.scan{position:relative;overflow:hidden;border-radius:20px;background:#04090C;line-height:0}
.scan img{display:block;width:100%;height:auto}
.tag{position:absolute;left:10px;bottom:10px;line-height:1.3;background:rgba(4,9,12,.72);color:#fff;font-size:12.5px;font-weight:600;padding:5px 10px;border-radius:8px}
.scan.sweep::after{content:"";position:absolute;left:0;right:0;top:0;height:30%;background:linear-gradient(180deg,transparent,rgba(94,234,222,.38),transparent);animation:sweep 1.8s var(--ease) 1 both;pointer-events:none}
@keyframes sweep{from{transform:translateY(-100%)}to{transform:translateY(400%)}}
.overlay{position:absolute;inset:0;width:100%;height:100%;transition:opacity .4s}
.overlay ellipse{transform-box:fill-box;transform-origin:center;animation:breathe 2.8s ease-in-out infinite}
@keyframes breathe{50%{transform:scale(1.12)}}
.split{display:grid;gap:22px;align-items:start}
@media(min-width:860px){.split{grid-template-columns:1.05fr 1fr}}
.stack{display:grid;gap:16px}
.imgcard{margin:0;padding:10px;border-radius:30px;background:var(--card);box-shadow:0 24px 44px -24px rgba(10,37,64,.4)}
.verdict{position:relative;border-radius:var(--r);padding:24px;color:#fff;background:linear-gradient(135deg,#E8863A,#E85D8A);box-shadow:0 22px 40px -20px rgba(232,93,138,.75)}
[data-outcome="none"] .verdict,[data-outcome="described"] .verdict{background:linear-gradient(135deg,var(--teal),var(--azure));box-shadow:0 22px 40px -20px rgba(14,159,154,.75)}
[data-outcome="invalid"] .verdict{background:linear-gradient(135deg,#6B7F90,#3F5266);box-shadow:0 22px 40px -20px rgba(63,82,102,.7)}
.pill{display:inline-block;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:800;background:rgba(255,255,255,.24);margin-bottom:12px}
.verdict h2{font-size:clamp(23px,3vw,31px);margin:0;line-height:1.22}
.vico{position:absolute;right:18px;top:16px;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:rgba(255,255,255,.22);animation:pop .8s var(--ease) .4s both}
.vico svg{width:24px;height:24px}
@keyframes pop{from{opacity:0;transform:scale(.4) rotate(-20deg)}}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:12px 0 0;padding:0}
.chips li{padding:6px 12px;border-radius:999px;background:var(--aqua);color:var(--teal-d);font-size:14px;font-weight:600;animation:rise .5s var(--ease) both;animation-delay:calc(var(--i,0)*90ms + .5s)}
.src{display:flex;gap:8px;font-size:13.5px;color:var(--muted);margin:14px 0 0}
.note{font-size:14.5px;color:var(--muted);margin:0}
.switch{display:flex;align-items:center;justify-content:space-between;gap:14px;font-weight:700;cursor:pointer}
.switch input{position:absolute;opacity:0}
.knob{width:54px;height:32px;border-radius:999px;background:var(--line);position:relative;transition:background .3s;flex:none}
.knob::after{content:"";position:absolute;left:4px;top:4px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 2px 6px rgba(0,0,0,.25);transition:transform .3s var(--ease)}
.switch input:checked+.knob{background:var(--teal)}
.switch input:checked+.knob::after{transform:translateX(22px)}
.switch input:focus-visible+.knob{outline:3px solid var(--azure);outline-offset:3px}
.legend{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--muted);margin-top:16px}
.heatbar{flex:1;height:10px;border-radius:6px;background:linear-gradient(90deg,rgba(245,165,36,.15),#F5A524,#E5432F)}
.ticks{list-style:none;padding:0;margin:12px 0}
.ticks li{position:relative;padding-left:32px;margin-bottom:10px}
.ticks li::before{content:"✓";position:absolute;left:0;top:1px;width:22px;height:22px;border-radius:50%;background:var(--aqua);color:var(--teal-d);font-size:12px;font-weight:800;display:grid;place-items:center}
summary{cursor:pointer;font-weight:700;font-size:18px;min-height:32px}
.err{background:#FFF1D1;color:#6A4300;border:1px solid #F0C979;border-radius:14px;padding:12px 14px;margin:14px 0;font-size:15px}
.err[hidden]{display:none}
.foot{margin-top:30px;display:flex;justify-content:center;align-items:center;gap:8px;color:var(--muted);font-size:14px}
.sticky-cta{display:flex;justify-content:flex-end}
/* upload */
.upl{margin:0 0 18px}.upl .btn{margin-top:14px}
.drop{position:relative;display:grid;place-items:center;gap:10px;margin-top:14px;padding:22px;text-align:center;border:2px dashed var(--teal);border-radius:20px;background:var(--aqua);color:var(--teal-d);font-weight:700;cursor:pointer;transition:background .25s,transform .25s var(--ease)}
.drop:hover{background:#cdf1ee;transform:translateY(-2px)}.drop:focus-within{outline:3px solid var(--azure);outline-offset:3px}
.drop input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}
.drop img{max-height:180px;max-width:100%;border-radius:12px;animation:rise .5s var(--ease) both}
.consent{display:flex;gap:12px;align-items:flex-start;margin-top:14px;font-size:14.5px;color:var(--muted);cursor:pointer}
.consent input{width:22px;height:22px;margin:2px 0 0;accent-color:var(--teal);flex:none}
/* loader */
.loader{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:20px;background:rgba(7,22,38,.72);backdrop-filter:blur(10px);animation:fade .3s both}
.loader[hidden]{display:none}
.lcard{width:min(420px,100%);padding:26px;border-radius:30px;text-align:center;color:#fff;background:linear-gradient(160deg,#0B3A52,#0A2540);border:1px solid rgba(255,255,255,.14);box-shadow:0 40px 80px -30px #000;animation:rise .5s var(--ease) both}
.lcard p{margin:14px 0 4px;font-weight:700;font-size:18px;min-height:1.6em;color:#fff}
.lcard small{color:rgba(255,255,255,.65)}
/* ultrasound fan art */
.fan{width:100%;height:auto;display:block;overflow:visible}
.fan .shape{fill:rgba(255,255,255,.07);stroke:rgba(255,255,255,.5);stroke-width:1.5}
.fan .arc{fill:none;stroke:rgba(255,255,255,.22);stroke-width:1}
.fan .beam{transform-origin:100px 8px;animation:beam 3.2s ease-in-out infinite alternate}
.fan .beam path{fill:url(#bg)}
.fan .beam line{stroke:#7DF3E6;stroke-width:2;stroke-linecap:round}
.fan .ping{fill:none;stroke:#7DF3E6;stroke-width:1.5;transform-box:fill-box;transform-origin:center;animation:ping 2.6s ease-out infinite}
@keyframes beam{from{transform:rotate(-36deg)}to{transform:rotate(36deg)}}
@keyframes ping{from{transform:scale(.5);opacity:.9}to{transform:scale(3.2);opacity:0}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}