:root{--wine:#660000;--wine2:#660000;--ink:#171414;--paper:#fbf8f5;--cream:#f2ece6;--line:#d9cec8;--yellow:#ffe20b}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper)}button{font:inherit}.brain-header{height:96px;background:var(--wine);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;position:sticky;top:0;z-index:50;box-shadow:0 8px 25px #3d000026}.brand{display:flex;align-items:center;gap:14px;min-width:390px}.brain{font-family:Georgia,serif;font-weight:800;font-size:31px;letter-spacing:.03em}.brand-sub{font-size:11px;opacity:.82;max-width:270px;line-height:1.25}.logo-mark{width:48px;height:48px;background:#7d0000;position:relative;border:1px solid #8d2020;overflow:hidden}.logo-mark .n{position:absolute;width:8px;height:8px;border-radius:50%;background:var(--yellow);z-index:2}.n1{left:7px;top:22px}.n2{left:18px;top:9px}.n3{left:31px;top:14px}.n4{left:25px;top:30px}.n5{left:38px;top:35px}.logo-mark i{position:absolute;height:2px;background:var(--yellow);transform-origin:left}.l1{width:18px;left:10px;top:24px;transform:rotate(-47deg)}.l2{width:15px;left:21px;top:13px;transform:rotate(17deg)}.l3{width:18px;left:30px;top:18px;transform:rotate(78deg)}.l4{width:15px;left:27px;top:33px;transform:rotate(9deg)}nav{display:flex;gap:7px}nav button{border:0;background:transparent;color:#fff;padding:10px 13px;border-radius:20px;cursor:pointer;font-size:13px;opacity:.72}nav button:hover,nav button.active{background:#ffffff18;opacity:1}.section{padding:88px max(6vw,40px)}.hero{min-height:650px;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:5vw;background:linear-gradient(120deg,#fbf8f5 0 62%,#eee4dd 62%)}.eyebrow,.mini{font-size:11px;font-weight:800;letter-spacing:.18em;color:var(--wine)}h1{font-family:Georgia,serif;font-size:clamp(48px,5.3vw,78px);line-height:.98;margin:18px 0 24px;letter-spacing:-.04em}h1 em{font-weight:400;color:var(--wine)}.lead{font-size:19px;line-height:1.65;max-width:720px;color:#554d49}.authors{font-size:12px;line-height:1.5;color:#776c67;max-width:680px;border-left:3px solid var(--wine);padding-left:13px;margin:22px 0}.hero-actions{display:flex;gap:10px;margin-top:28px}.primary,.ghost{border:0;border-radius:4px;padding:14px 20px;cursor:pointer;font-weight:700}.primary{background:var(--wine);color:#fff}.ghost{background:transparent;color:var(--wine);border:1px solid #b99e94}.portal-wrap{display:grid;place-items:center;perspective:900px}.portal{width:min(410px,38vw);aspect-ratio:1;position:relative;border-radius:50%;background:radial-gradient(circle at 50% 42%,#9b3838 0 4%,#570000 38%,#170000 72%);box-shadow:0 0 0 18px #66000014,0 0 0 38px #6600000b,0 35px 60px #35000030;overflow:hidden}.portal:before{content:"";position:absolute;inset:8%;border:1px solid #f3c8b650;border-radius:50%;box-shadow:inset 0 0 50px #ffb19b22}.grid-floor{position:absolute;left:-20%;right:-20%;bottom:-5%;height:48%;background:repeating-linear-gradient(90deg,#fff2 0 1px,transparent 1px 45px),repeating-linear-gradient(0deg,#fff2 0 1px,transparent 1px 34px);transform:perspective(250px) rotateX(58deg);transform-origin:bottom}.cube{position:absolute;border:1px solid #ffded280;background:#ffffff0d;box-shadow:0 0 24px #fff2;animation:float 5s ease-in-out infinite}.c1{width:62px;height:62px;left:18%;top:30%;transform:rotate(18deg)}.c2{width:40px;height:40px;right:20%;top:24%;animation-delay:-2s}.c3{width:30px;height:30px;right:31%;bottom:23%;animation-delay:-3s}@keyframes float{50%{translate:0 -12px;rotate:8deg}}.portal-label{position:absolute;inset:0;display:grid;place-content:center;text-align:center;color:#fff;text-shadow:0 2px 12px #000}.portal-label b{font-size:28px;letter-spacing:.18em}.portal-label span{font-size:10px;letter-spacing:.28em;margin-top:7px}.insight-strip{padding-top:30px;padding-bottom:30px;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}.insight-strip>div{padding:20px 28px;border-right:1px solid var(--line)}.insight-strip>div:last-child{border:0}.insight-strip b{display:block;color:var(--wine);font-size:12px}.insight-strip span{display:block;font-family:Georgia,serif;font-size:22px;margin:9px 0}.insight-strip p{font-size:13px;color:#6d625d;line-height:1.5;margin:0}.pale{background:var(--cream)}.section-head{max-width:800px;margin-bottom:42px}.section-head h2{font-family:Georgia,serif;font-size:46px;line-height:1.08;margin:12px 0}.section-head p{color:#6b615c;line-height:1.6}.compare-switch{display:flex;width:max-content;border:1px solid #bbaaa2;padding:4px;border-radius:30px}.tech{border:0;background:transparent;padding:11px 18px;border-radius:25px;cursor:pointer}.tech.active{background:var(--wine);color:#fff}.compare-stage{display:grid;grid-template-columns:.8fr 1.2fr;gap:7vw;align-items:center;margin-top:40px}.device{height:300px;max-width:440px;background:var(--wine);border-radius:80px 80px 55px 55px;position:relative;box-shadow:inset 0 -30px 50px #30000066,0 30px 50px #3f000025;transition:.4s}.lens{position:absolute;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle,#efb0a6 0,#5a1515 34%,#160606 70%);top:70px}.lens.left{left:55px}.lens.right{right:55px}.device>span{position:absolute;bottom:38px;left:0;right:0;text-align:center;color:#fff;font-size:10px;letter-spacing:.2em}.device.ar{border-radius:35px;background:linear-gradient(135deg,#9c8780,#e7ddd7);height:280px}.device.ar .lens{width:150px;height:90px;border-radius:15px;background:#f8f2ed99;border:2px solid var(--wine);top:75px}.metric{padding:18px 0;border-bottom:1px solid #cdbdb6}.metric span{display:block;font-size:11px;color:#7b6d67;text-transform:uppercase;letter-spacing:.12em;margin-bottom:5px}.metric strong{font-family:Georgia,serif;font-size:20px;font-weight:500}.disciplines{background:#fff}.field-grid{display:flex;gap:8px;flex-wrap:wrap}.field{padding:12px 16px;border:1px solid #ccbcb5;background:#fff;border-radius:3px;cursor:pointer}.field.active{background:var(--wine);color:#fff;border-color:var(--wine)}.field-card{margin-top:24px;min-height:230px;background:#f5efea;border-left:5px solid var(--wine);display:grid;grid-template-columns:180px 1fr;align-items:center;padding:35px 45px;gap:25px}.field-icon{font-size:78px;color:var(--wine);text-align:center}.field-card h3{font-family:Georgia,serif;font-size:32px;margin:9px 0}.field-card p{line-height:1.6;color:#5d5551}.example{font-size:12px;color:var(--wine);font-weight:700}.dark{background:#1d1817;color:#fff}.dark .eyebrow,.dark .mini{color:#dca8a8}.dark .section-head p{color:#bdb0ab}.roadmap{display:grid;grid-template-columns:110px 1fr;gap:35px}.step-tabs{display:grid;gap:7px}.step-tabs button{height:55px;border:1px solid #ffffff25;background:transparent;color:#fff;cursor:pointer;font-family:Georgia,serif;font-size:18px}.step-tabs button.active{background:var(--wine);border-color:var(--wine)}.step-panel{min-height:360px;border:1px solid #ffffff24;padding:45px;display:grid;grid-template-columns:150px 1fr;gap:25px;align-items:center}.big-num{font-family:Georgia,serif;font-size:100px;color:#ffffff15}.step-panel h3{font-family:Georgia,serif;font-size:38px;margin:10px 0}.step-panel p{color:#c9bfbb;line-height:1.7;max-width:700px}.outcome{margin-top:28px;background:#ffffff0c;border-left:3px solid #b35b5b;padding:16px 18px}.outcome b,.outcome span{display:block}.outcome b{font-size:10px;letter-spacing:.15em;color:#dca8a8;margin-bottom:5px}.lab{background:#f8f3ef}.lab-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:28px}.challenge-list{display:grid;gap:9px}.challenge{text-align:left;border:1px solid #d3c5be;background:#fff;padding:18px;cursor:pointer}.challenge.active{border-color:var(--wine);box-shadow:inset 4px 0 var(--wine)}.challenge b,.challenge span{display:block}.challenge span{font-size:12px;color:#756b66;margin-top:5px}.recommendation{background:#fff;padding:38px;border-top:5px solid var(--wine);box-shadow:0 12px 35px #4a20140d}.rec-badge{display:inline-block;background:var(--wine);color:#fff;padding:7px 10px;margin-top:15px;font-size:12px;font-weight:800}.recommendation h3{font-family:Georgia,serif;font-size:34px;margin:16px 0 10px}.recommendation p{line-height:1.65;color:#5d5551}.why{margin-top:22px;padding:16px;background:#f5efea}.why b,.why span{display:block}.why b{font-size:10px;color:var(--wine);letter-spacing:.14em;margin-bottom:5px}.caution{font-size:11px!important;color:#857a75!important}.risks{background:#fff}.risk-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.risk-grid article{border:1px solid #ded3cd;padding:28px;min-height:210px}.risk-grid article span{font-size:10px;color:var(--wine);font-weight:800;letter-spacing:.16em}.risk-grid h3{font-family:Georgia,serif;font-size:25px}.risk-grid p{font-size:14px;color:#6b625e;line-height:1.6}.takeaway{text-align:center;background:var(--cream)}blockquote{font-family:Georgia,serif;font-size:clamp(34px,4vw,58px);max-width:900px;margin:25px auto;color:var(--wine)}.takeaway p{max-width:700px;margin:0 auto 28px;color:#6b615c;line-height:1.7}footer{background:var(--wine);color:#fff;padding:28px 6vw;display:flex;justify-content:space-between;align-items:center;font-size:11px}.footer-brand{font-family:Georgia,serif;font-size:24px;font-weight:bold}@media(max-width:900px){.brain-header{height:auto;padding:16px 20px;align-items:flex-start}.brand{min-width:0}.brand-sub{display:none}nav{display:none}.section{padding:64px 24px}.hero{grid-template-columns:1fr;background:var(--paper)}.portal{width:min(360px,82vw)}.insight-strip{grid-template-columns:1fr 1fr}.compare-stage,.lab-layout{grid-template-columns:1fr}.roadmap{grid-template-columns:1fr}.step-tabs{grid-template-columns:repeat(6,1fr)}.step-panel{grid-template-columns:1fr}.big-num{display:none}.field-card{grid-template-columns:1fr}.risk-grid{grid-template-columns:1fr}footer{gap:12px;flex-wrap:wrap}}

/* v2 interactive additions */
.challenge-zone,.risk-game,.builder{margin-top:42px;padding:32px;border:1px solid #e4d8d8;border-radius:24px;background:#fff}.challenge-zone h3,.risk-game h3,.builder h3{margin:8px 0 10px}.quiz-card{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.quiz-options{display:flex;gap:12px;flex-wrap:wrap}.quiz-options button,.builder select,.risk-options button,.next-step{border:1px solid #660000;background:#fff;color:#660000;border-radius:12px;padding:12px 16px;font-weight:700}.quiz-options button:hover,.risk-options button:hover,.next-step:hover{background:#660000;color:#fff}.feedback-box{min-height:92px;padding:18px;border-radius:16px;background:#f7f1f1}.progress-shell{height:10px;background:#ffffff22;border-radius:99px;overflow:hidden;margin:18px 0 28px}.progress-fill{height:100%;width:16.66%;background:#fff;transition:.35s}.road-controls{display:flex;justify-content:flex-end;margin-top:16px}.builder-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.builder label{display:flex;flex-direction:column;gap:8px;font-size:.8rem;font-weight:800;letter-spacing:.04em}.builder select{width:100%;font-weight:600}.build-output{margin-top:20px;padding:22px;border-left:5px solid #660000;background:#f7f1f1;border-radius:12px}.build-output .pill{display:inline-block;background:#660000;color:#fff;padding:6px 10px;border-radius:99px;font-size:.75rem;font-weight:800}.risk-game{background:#f8f3f3}.risk-options{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}.score{font-weight:800;color:#660000}.done-badge{display:inline-block;margin-top:8px;padding:8px 12px;border-radius:99px;background:#e8f3ea;color:#245b2d;font-weight:800}@media(max-width:800px){.quiz-card,.builder-grid{grid-template-columns:1fr}}

/* VR Learning Mission */
.vr-mission{background:#0d0d10;color:#fff;overflow:hidden}.vr-mission .section-head p{color:#c9c9cf}.vr-shell{max-width:1120px;margin:34px auto 0;border:1px solid #5d2028;background:#09090b;box-shadow:0 24px 70px #0008}.vr-hud,.vr-console{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 18px;background:#16080b;border-bottom:1px solid #5d2028;font-size:11px;letter-spacing:.12em}.vr-hud>span:first-child{color:#ffccd2}.immersion{display:flex;align-items:center;gap:10px;flex:1;max-width:430px}.meter{height:7px;background:#311217;flex:1;border-radius:8px;overflow:hidden}.meter i{display:block;height:100%;width:0;background:#a51f35;transition:width .5s ease}.vr-view{position:relative;min-height:520px;overflow:hidden;background:radial-gradient(circle at 50% 35%,#3b1820 0,#180c10 26%,#08090b 72%);perspective:900px}.vr-view:before{content:"";position:absolute;left:8%;right:8%;bottom:-18%;height:55%;background:repeating-linear-gradient(90deg,#7a253333 0 1px,transparent 1px 70px),repeating-linear-gradient(0deg,#7a253333 0 1px,transparent 1px 55px);transform:rotateX(62deg);transform-origin:bottom}.vr-view:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#0008,transparent 20% 80%,#0008);pointer-events:none}.scanline{position:absolute;inset:0;background:repeating-linear-gradient(0deg,transparent 0 5px,#fff 6px,#fff0 7px);opacity:.025;pointer-events:none}.reticle{position:absolute;left:50%;top:52%;transform:translate(-50%,-50%);font-size:32px;color:#fff6;font-weight:200}.room-title{position:absolute;left:6%;top:7%;max-width:520px;z-index:2}.room-title small{color:#e66778;letter-spacing:.18em}.room-title h3{font-size:32px;margin:8px 0}.room-title p{color:#d3c8ca;line-height:1.55}.hotspot{position:absolute;z-index:3;width:150px;height:120px;border:1px solid #8f3c49;background:#1c0e12dd;color:#fff;cursor:pointer;clip-path:polygon(10% 0,90% 0,100% 14%,100% 86%,90% 100%,10% 100%,0 86%,0 14%);transition:.2s}.hotspot:hover{transform:translateY(-6px) scale(1.03);background:#5e101e;box-shadow:0 0 28px #a51f3566}.hotspot span{display:block;font-size:28px;color:#ff9baa}.hotspot b{font-size:12px}.hs-body{left:17%;bottom:16%}.hs-lab{left:44%;bottom:10%}.hs-text{right:17%;bottom:18%}.mission-feedback{position:absolute;right:5%;top:8%;z-index:3;width:270px;padding:14px;border-left:3px solid #660000;background:#0b0b0ddd;color:#ddd;font-size:13px;line-height:1.45}.mission-feedback.good{border-color:#8fbc8f}.mission-feedback.bad{border-color:#e66778}.vr-console{border-top:1px solid #5d2028;border-bottom:0}.vr-console>div{display:grid;gap:4px}.vr-console span{color:#b99da2;font-size:9px}.vr-console button{border:1px solid #8f3c49;background:#660000;color:#fff;padding:11px 18px;cursor:pointer}.vr-console button:disabled{opacity:.35;cursor:not-allowed}@media(max-width:800px){.vr-view{min-height:650px}.room-title{right:6%}.mission-feedback{top:37%;left:6%;right:auto;width:auto}.hotspot{width:120px;height:100px}.hs-body{left:7%;bottom:12%}.hs-lab{left:36%;bottom:8%}.hs-text{right:7%;bottom:12%}.vr-hud{flex-wrap:wrap}.immersion{order:3;min-width:100%}.vr-console{align-items:flex-start;flex-wrap:wrap}}

/* v4 interaction states */
button:disabled{cursor:not-allowed;filter:saturate(.65)}
.quiz-options button.correct,.risk-options button.correct,.hotspot.correct{outline:3px solid rgba(255,255,255,.9);box-shadow:0 0 0 5px rgba(102,0,0,.25),0 12px 28px rgba(0,0,0,.18)}
.quiz-options button.wrong,.risk-options button.wrong,.hotspot.wrong{opacity:.72;transform:scale(.98)}
.hotspot.selected{z-index:5}
button:focus-visible,select:focus-visible{outline:3px solid #660000;outline-offset:3px}
.dark button:focus-visible,.vr-mission button:focus-visible{outline-color:#fff}

/* Virtual Anatomy Lab */
.anatomy-lab{background:linear-gradient(180deg,#f7f3f3,#fff)}
.anatomy-shell{border:1px solid #e1d5d5;border-radius:24px;overflow:hidden;background:#fff;box-shadow:0 18px 50px rgba(65,0,0,.08)}
.anatomy-toolbar{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:#660000;color:#fff}.mode-switch{display:flex;gap:8px}.mode-switch button{border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;padding:9px 14px;border-radius:999px;cursor:pointer}.mode-switch button.active{background:#fff;color:#660000}.anatomy-score{font-size:13px;font-weight:700;letter-spacing:.04em}
.anatomy-stage{display:grid;grid-template-columns:1.35fr .8fr;min-height:510px}.heart-wrap{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;background:radial-gradient(circle at 50% 42%,#fff 0,#f4eaea 45%,#e9dada 100%);perspective:900px}.heart-wrap:before{content:"AR ANATOMY VIEW";position:absolute;top:24px;left:28px;font-size:11px;letter-spacing:.18em;color:#660000;font-weight:800}.heart-model{width:310px;height:350px;position:relative;transform-style:preserve-3d;transition:transform .35s ease;filter:drop-shadow(0 28px 24px rgba(70,0,0,.18))}.heart-model:before{content:"";position:absolute;inset:48px 35px 25px;border-radius:46% 54% 52% 48% / 36% 37% 63% 64%;background:linear-gradient(135deg,#8c1717,#5a0000);transform:rotate(-7deg);box-shadow:inset 18px 12px 35px rgba(255,255,255,.14)}
.heart-part{position:absolute;z-index:3;border:1px solid rgba(255,255,255,.75);background:rgba(255,255,255,.16);backdrop-filter:blur(2px);color:#fff;border-radius:50%;cursor:pointer;transition:.2s;box-shadow:0 0 0 4px rgba(255,255,255,.08)}.heart-part:hover,.heart-part.selected{transform:scale(1.08);background:rgba(255,255,255,.34);box-shadow:0 0 0 7px rgba(102,0,0,.12)}.heart-part span{position:absolute;white-space:nowrap;background:#fff;color:#660000;border:1px solid #d8c1c1;border-radius:7px;padding:5px 8px;font-size:11px;font-weight:700;left:50%;top:-32px;transform:translateX(-50%)}.heart-model.test .heart-part span{display:none}.hp-ra{width:86px;height:86px;left:55px;top:105px}.hp-la{width:76px;height:72px;right:52px;top:102px}.hp-rv{width:100px;height:120px;left:64px;bottom:48px}.hp-lv{width:105px;height:145px;right:48px;bottom:36px}.vessel{position:absolute;z-index:2;color:#fff;font-size:9px;font-weight:800;letter-spacing:.08em;text-align:center;padding-top:16px}.aorta{width:50px;height:100px;border-radius:25px 25px 8px 8px;background:#7c0808;left:145px;top:10px;transform:rotate(10deg)}.pulmonary{width:42px;height:80px;border-radius:20px;background:#8b2525;left:103px;top:35px;transform:rotate(-20deg)}
.rotate-hint{font-size:11px;color:#765;letter-spacing:.08em;margin-top:8px}.rotate-controls{display:flex;gap:8px;margin-top:12px}.rotate-controls button{border:1px solid #d7c5c5;background:#fff;color:#660000;border-radius:9px;padding:8px 12px;cursor:pointer}.anatomy-panel{padding:42px 34px;background:#fff;border-left:1px solid #eadede}.anatomy-panel h3{font-size:30px;margin:10px 0}.anatomy-panel p{color:#675b5b;line-height:1.6}.anatomy-info{min-height:110px;margin:22px 0;padding:18px;border-radius:14px;background:#f7f1f1;border-left:4px solid #660000;line-height:1.55;color:#433}.anatomy-info.correct{background:#eef7ef;border-left-color:#2e6d38}.anatomy-info.wrong{background:#fff0f0;border-left-color:#9d1d1d}
@media(max-width:850px){.anatomy-stage{grid-template-columns:1fr}.anatomy-panel{border-left:0;border-top:1px solid #eadede}.heart-wrap{min-height:500px}.anatomy-toolbar{gap:12px;align-items:flex-start;flex-direction:column}}

/* V6 — simplified article presentation + enhanced practical lab */
.compact-overview{padding-top:58px;padding-bottom:58px}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.summary-grid article{padding:26px;border:1px solid #e4d8d8;border-radius:20px;background:#fff}.summary-grid article>b{color:#660000;font-size:12px;letter-spacing:.16em}.summary-grid h3{margin:12px 0 8px;font-size:22px}.summary-grid p{color:#6e6262;line-height:1.55}.summary-grid button{border:0;background:transparent;color:#660000;padding:8px 0;font-weight:800;cursor:pointer}.challenge-zone.slim{display:grid;grid-template-columns:1.2fr auto 1fr;gap:18px;align-items:center}.challenge-zone.slim .mini{grid-column:1/-1}.challenge-zone.slim h3{font-size:18px;margin:0}.challenge-zone.slim .feedback-box{min-height:0}.demo-note{max-width:900px;margin:18px auto 0;color:#766;font-size:12px;line-height:1.55;text-align:center}.heart-wrap{background:radial-gradient(circle at 50% 44%,#fff 0,#f4e9e9 43%,#e8d5d5 100%)}.scanner-ring{position:absolute;border:1px solid rgba(102,0,0,.14);border-radius:50%;pointer-events:none}.scanner-ring.r1{width:410px;height:410px}.scanner-ring.r2{width:500px;height:500px;border-style:dashed;animation:scanSpin 18s linear infinite}@keyframes scanSpin{to{transform:rotate(360deg)}}.heart-model{transform:rotateZ(-2deg)}.heart-model:before{inset:43px 28px 18px;border-radius:47% 53% 57% 43% / 31% 37% 63% 69%;background:radial-gradient(circle at 34% 26%,#b73b3b 0 8%,transparent 9%),linear-gradient(145deg,#a52d2d 0,#761111 38%,#4f0000 75%,#300 100%);box-shadow:inset 18px 10px 32px rgba(255,255,255,.16),inset -18px -20px 30px rgba(35,0,0,.32),0 24px 35px rgba(70,0,0,.18)}.heart-model:after{content:"";position:absolute;z-index:1;width:115px;height:58px;left:96px;top:68px;border:18px solid #7b1212;border-bottom:0;border-radius:70px 70px 0 0;transform:rotate(8deg);opacity:.9}.heart-part{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.7)}.heart-part:hover,.heart-part.selected{background:rgba(255,255,255,.3);box-shadow:0 0 0 7px rgba(102,0,0,.12),0 0 24px rgba(255,255,255,.32)}.anatomy-panel{display:flex;flex-direction:column;justify-content:center}.anatomy-panel .primary{align-self:flex-start}.risk-grid article{padding:22px}.risk-grid article h3{margin:8px 0;font-size:20px}.takeaway blockquote{max-width:900px}@media(max-width:850px){.summary-grid{grid-template-columns:1fr}.challenge-zone.slim{grid-template-columns:1fr}.challenge-zone.slim .mini{grid-column:auto}.scanner-ring.r2{width:430px;height:430px}}
/* V7 NeuroLab + reference-inspired BRAIN header */
.brain-header{background:#660000!important;min-height:112px;padding:10px 4.5%!important;align-items:center!important}.brand-image{min-width:370px;display:flex;align-items:center}.brand-image img{display:block;width:min(390px,42vw);height:78px;object-fit:contain;object-position:left center}.brain-header nav{align-self:flex-end;margin-bottom:12px}.neuro-shell{overflow:hidden}.brain-wrap{min-height:480px}.brain-model{width:min(590px,94%);height:auto;position:relative;z-index:3;filter:drop-shadow(0 22px 28px rgba(52,0,0,.18));transition:transform .35s ease;transform-style:preserve-3d}.brain-part{stroke:#fff;stroke-width:5;cursor:pointer;transition:filter .2s,opacity .2s,transform .2s;transform-origin:center}.brain-part:hover,.brain-part.selected{filter:brightness(1.09) drop-shadow(0 0 12px rgba(102,0,0,.28))}.frontal{fill:#8f3030}.parietal{fill:#b85a5a}.temporal{fill:#d18a8a}.occipital{fill:#6f1f1f}.cerebellum{fill:#a84b4b}.brain-stem{fill:#d7b3b3;stroke:#fff;stroke-width:5}.brain-labels{pointer-events:none}.brain-labels text{font-size:15px;font-weight:800;letter-spacing:1.5px;fill:#fff;text-anchor:middle;paint-order:stroke;stroke:rgba(70,0,0,.35);stroke-width:2px}.brain-model.test .brain-labels{opacity:0}.brain-model.test .brain-part{fill:#9b6868}.brain-part.correct-pick{fill:#548264!important}.brain-part.wrong-pick{fill:#9a3d3d!important}.scan-beam{position:absolute;z-index:4;left:15%;right:15%;height:2px;background:rgba(102,0,0,.32);box-shadow:0 0 18px rgba(102,0,0,.3);animation:brainScan 4s ease-in-out infinite;pointer-events:none}@keyframes brainScan{0%,100%{top:20%;opacity:.25}50%{top:72%;opacity:.8}}@media(max-width:900px){.brain-header{min-height:auto}.brand-image{min-width:0;width:100%}.brand-image img{width:min(390px,92vw);height:auto}.brain-header nav{align-self:auto;margin-bottom:0}.brain-wrap{min-height:390px}}
/* V9: crisp vector BRAIN header + NeuroLab spotlight */
.brain-header{background:#660000!important}
.brand-vector{min-width:430px;gap:12px;color:#e6d323;display:flex;align-items:center}
.brand-mark{width:76px;height:64px;flex:0 0 auto;overflow:visible}
.brand-copy{font-family:Georgia,"Times New Roman",serif;color:#e6d323;line-height:1}
.brand-name{font-size:29px;font-weight:800;letter-spacing:.11em;margin-bottom:4px}
.brand-title{font-size:11px;font-weight:700;line-height:1.08;letter-spacing:.035em}
.brand-issn{font-size:8px;font-weight:700;letter-spacing:.08em;text-align:right;margin-top:5px}
.nav-neurolab{border:1px solid #fff20055!important;color:#e6d323!important;opacity:1!important}
.nav-neurolab:hover,.nav-neurolab.active{background:#fff20018!important}
.featured-kicker{display:inline-block;margin-top:18px;padding:7px 10px;border:1px solid #66000035;color:#660000;font-size:10px;font-weight:900;letter-spacing:.11em;background:#fff}
.neuro-cta{box-shadow:0 8px 22px #66000028;transform:translateZ(0)}
.neuro-cta:hover{transform:translateY(-2px)}
.neurolab-spotlight{background:#660000;color:#fff;display:grid;grid-template-columns:1.35fr .8fr auto;gap:32px;align-items:center;padding:24px max(6vw,40px);border-top:1px solid #7b1b1b;border-bottom:1px solid #4b0000}
.neurolab-spotlight span{display:block;color:#e6d323;font-size:9px;font-weight:900;letter-spacing:.18em;margin-bottom:5px}
.neurolab-spotlight strong{font-family:Georgia,serif;font-size:27px;color:#fff}
.neurolab-spotlight p{margin:5px 0 0;color:#eadada;font-size:13px;line-height:1.4}
.spotlight-meta{display:flex;align-items:center;justify-content:center;gap:10px;color:#e6d323;font-size:11px;letter-spacing:.08em}.spotlight-meta i{font-style:normal;color:#c98f8f}
.neurolab-spotlight .primary{background:#fff200;color:#660000;white-space:nowrap;padding:12px 18px}
.neuro-lab{box-shadow:inset 0 8px 0 #66000012}
@media(max-width:900px){.brand-vector{min-width:0}.brand-mark{width:62px;height:54px}.brand-name{font-size:24px}.brand-title{font-size:9px}.neurolab-spotlight{grid-template-columns:1fr;padding:22px 24px;gap:14px}.spotlight-meta{justify-content:flex-start}}

/* V10: desktop first screen fits exactly in the viewport */
@media (min-width:901px){
  .brain-header{height:120px;min-height:120px;position:sticky;top:0}
  .hero.section{height:calc(100vh - 120px);min-height:0;padding:clamp(18px,3vh,34px) max(6vw,40px);align-items:center;overflow:hidden}
  .hero-copy{align-self:center;max-width:760px}
  .hero .eyebrow{font-size:10px}
  .hero h1{font-size:clamp(50px,min(5.1vw,8.8vh),78px);margin:clamp(10px,1.6vh,18px) 0 clamp(12px,2vh,22px);line-height:.97}
  .hero .lead{font-size:clamp(15px,1.35vw,18px);line-height:1.5;margin:0;max-width:710px}
  .hero .authors{margin:clamp(12px,1.7vh,20px) 0;font-size:11px}
  .hero .featured-kicker{margin-top:clamp(6px,1vh,12px);padding:6px 9px}
  .hero-actions{margin-top:clamp(10px,1.4vh,18px)}
  .hero-actions .primary,.hero-actions .ghost{padding:12px 18px}
  .portal{width:min(390px,35vw,48vh)}
  .portal-label b{font-size:25px}
  .neurolab-spotlight{min-height:112px}
}
@media (min-width:901px) and (max-height:760px){
  .brain-header{height:104px;min-height:104px;padding-top:6px!important;padding-bottom:6px!important}
  .brand-mark{width:68px;height:57px}.brand-name{font-size:27px}.brand-title{font-size:10px}
  .brain-header nav{margin-bottom:7px}
  .hero.section{height:calc(100vh - 104px);padding-top:14px;padding-bottom:14px}
  .hero h1{font-size:clamp(46px,8.1vh,66px);margin:8px 0 12px}
  .hero .lead{font-size:15px;line-height:1.42}.hero .authors{margin:10px 0}.hero .featured-kicker{margin-top:5px}
  .hero-actions{margin-top:9px}.portal{width:min(350px,43vh)}
}
/* V11 — logo proportions matched to the supplied BRAIN reference */
.brand-exact{min-width:455px;display:flex;align-items:center;gap:0}
.brain-logo-svg{display:block;width:445px;height:auto;max-height:88px;overflow:visible}
@media(max-width:1100px){.brand-exact{min-width:390px}.brain-logo-svg{width:390px}}
@media(max-width:900px){.brand-exact{min-width:0;width:100%}.brain-logo-svg{width:min(430px,88vw);max-height:none}}

/* V13 — exact supplied BRAIN logo + first-screen composition */
.brain-header{height:112px!important;min-height:112px!important;background:#660000!important;padding:8px 4.5%!important}
.exact-logo{min-width:455px!important;display:flex;align-items:center}
.exact-logo img{display:block;width:455px;height:auto;max-height:96px;object-fit:contain;object-position:left center}
.brain-header nav{align-self:center!important;margin-bottom:0!important}
@media (min-width:901px){
  .hero.section{height:calc(100vh - 112px - 120px)!important;min-height:500px!important;padding:14px max(6vw,40px)!important;overflow:hidden!important;align-items:center!important}
  .hero h1{font-size:clamp(44px,min(4.8vw,7.6vh),68px)!important;margin:7px 0 12px!important;line-height:.96!important}
  .hero .lead{font-size:clamp(14px,1.2vw,17px)!important;line-height:1.42!important;margin:0!important}
  .hero .authors{margin:10px 0!important;font-size:11px!important}
  .hero .featured-kicker{margin-top:5px!important;padding:6px 9px!important}
  .hero-actions{margin-top:9px!important}
  .hero-actions .primary,.hero-actions .ghost{padding:11px 17px!important}
  .portal{width:min(340px,39vh)!important}
  .neurolab-spotlight{height:120px!important;min-height:120px!important;padding:16px 6vw!important;box-sizing:border-box!important}
  .neurolab-spotlight strong{font-size:30px!important}
  .neurolab-spotlight p{margin-top:3px!important;margin-bottom:0!important}
}
@media (min-width:901px) and (max-height:760px){
  .brain-header{height:102px!important;min-height:102px!important}
  .exact-logo img{width:420px;max-height:86px}
  .hero.section{height:calc(100vh - 102px - 112px)!important;min-height:430px!important;padding-top:10px!important;padding-bottom:10px!important}
  .hero h1{font-size:clamp(42px,7vh,60px)!important}
  .portal{width:min(310px,37vh)!important}
  .neurolab-spotlight{height:112px!important;min-height:112px!important;padding-top:12px!important;padding-bottom:12px!important}
}
@media(max-width:900px){
  .brain-header{height:auto!important;min-height:auto!important}
  .exact-logo{min-width:0!important;width:100%}
  .exact-logo img{width:min(455px,90vw);height:auto;max-height:none}
}