:root{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#e4e9eb;background:#10171c;font-synthesis:none;--bg:#10171c;--panel:#151f26;--border:#2a363e;--muted:#9ba9b2;--teal:#75d0c6;--amber:#d9b779;color-scheme:dark}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer;color:inherit}button{border:1px solid var(--border);background:#19262e;border-radius:7px;padding:9px 14px;transition:background .15s,border-color .15s}button:hover{background:#22363f;border-color:#526871}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--teal);outline-offset:4px}a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,p{margin:0}button:disabled{opacity:.4;cursor:default}.muted{color:var(--muted)}[hidden]{display:none!important}.header{height:94px;max-width:1560px;margin:auto;padding:0 42px;display:flex;align-items:center;border-bottom:1px solid #263038;gap:40px}.brand{display:flex;gap:13px;align-items:center;color:#f2f4f3;font-size:22px;font-weight:560;letter-spacing:-.7px;white-space:nowrap}.brand:hover{text-decoration:none}.brand svg{width:37px;height:42px;color:var(--teal)}.brand span{display:block;font-weight:400;letter-spacing:.03px;font-size:11px;color:var(--muted);margin-top:6px}.header nav{display:flex;gap:30px;margin-left:auto;align-items:center;font-size:13px;white-space:nowrap}.header nav button{border:0;background:transparent;padding:12px 0;color:#aebac1}.header nav a{color:#e6efed;position:relative}.nav-active:after{content:"";position:absolute;bottom:-37px;left:0;right:0;height:2px;background:var(--teal)}.header-tag{font-size:9px;letter-spacing:1.6px;border:1px solid #3e4d50;padding:7px 9px;border-radius:4px;color:#bac9c8;margin-left:14px}
main{max-width:1500px;margin:auto;padding:34px 42px 0}.intro{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:29px}.eyebrow{font-size:10px;font-weight:600;letter-spacing:1.65px;color:#93b1b2}.intro h1{font-size:30px;letter-spacing:-1.1px;font-weight:470;line-height:1.25;margin:10px 0}.intro p{font-size:13px;color:#a6b2bb;line-height:1.7}.tour-button{font-size:12px;display:flex;align-items:center;gap:10px;padding:13px 17px;border-color:#37565b;background:#192b31;white-space:nowrap}.tour-button>span:first-child{font-size:20px;color:var(--teal)}.tour-button .muted{font-size:10px;margin-left:7px}.workspace-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:12px}.segmented{display:flex;border:1px solid var(--border);background:#111a20;padding:4px;border-radius:9px;gap:3px}.segmented button{font-size:12px;min-width:134px;background:transparent;border:0;padding:9px 16px;color:#a7b6bc}.segmented button.active{background:#2b4248;color:#cde8e4}.model-info{color:#8c9fa8;font-size:11px;display:flex;align-items:center;gap:8px}.status-dot{width:5px;height:5px;border-radius:50%;background:var(--teal)}.divider{margin:0 7px;color:#4d616b}.workspace{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(340px,1fr);gap:20px;align-items:start}.panel{border:1px solid var(--border);border-radius:12px;background:var(--panel);overflow:hidden}.panel-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid #25323b;gap:10px}.panel-head>div{display:flex;gap:10px;align-items:center}.panel-number{font-size:10px;color:#81929d;font-family:ui-monospace,SFMono-Regular,monospace;letter-spacing:.6px}.panel-head h2{font-size:13px;font-weight:520;letter-spacing:.1px}.small-badge{font-size:9px;color:#9cb4b8;background:#1c2c33;padding:5px 7px;border-radius:4px;white-space:nowrap}.anatomy-stage{height:562px;position:relative;isolation:isolate;background:radial-gradient(ellipse at center,#1c2a31 0%,#141e25 63%);overflow:hidden}#model-canvas{position:absolute;inset:0;z-index:2;touch-action:none;cursor:grab}#model-canvas:active{cursor:grabbing}#model-canvas canvas{display:block;width:100%;height:100%}.loading{position:absolute;inset:45% 0;text-align:center;color:var(--muted);font-size:12px}#model-labels{position:absolute;inset:0;z-index:3;pointer-events:none}.vessel-label{position:absolute;transform:translate(-50%,-50%);color:#c1d8d9;font:10px ui-monospace,monospace;padding:3px 5px;background:#132027cc;border:1px solid #395058;border-radius:3px;box-shadow:0 2px 6px #0003}.vessel-label.selected{color:#fff;border-color:#f8e2a9}.orbit-ring{position:absolute;border:1px dashed #38505a60;left:18%;right:18%;top:17%;bottom:17%;border-radius:50%;pointer-events:none;z-index:1}.axis-label{position:absolute;color:#6e8892;z-index:4;font-size:8px;font-weight:600;letter-spacing:2px;pointer-events:none}.axis-label.cranial{left:50%;top:16px;transform:translateX(-50%)}.axis-label.caudal{left:50%;bottom:17px;transform:translateX(-50%)}.axis-label span{color:#71878e;font-size:11px;margin-left:4px}.axis-label.rao{left:14px;top:49%;writing-mode:vertical-rl;transform:rotate(180deg)}.axis-label.lao{right:14px;top:49%;writing-mode:vertical-rl}.preset{position:absolute;z-index:5;width:123px;text-align:left;padding:10px 12px;background:#17242beb;border:1px solid #35434b;box-shadow:0 4px 20px #0001;border-radius:8px}.preset strong{display:block;font-size:11px;font-weight:530;margin-bottom:5px}.preset span{display:block;font-family:ui-monospace,monospace;font-size:9px;color:#8ca3ae}.preset svg{display:block;width:60px;height:33px;opacity:.7;margin-bottom:5px}.preset.active{background:#213b40ed;border-color:#71b9b2}.preset.active strong{color:#a5e4d9}.preset.active:after{content:"";width:5px;height:5px;border-radius:50%;background:#84d6c9;position:absolute;right:10px;top:12px}.preset.nw{left:25px;top:45px}.preset.ne{right:25px;top:45px}.preset.sw{left:25px;bottom:45px}.preset.se{right:25px;bottom:45px}.preset.n{left:50%;top:38px;transform:translateX(-50%);width:108px;padding:8px 11px}.preset.s{left:50%;bottom:38px;transform:translateX(-50%);width:108px;padding:8px 11px}.preset.n svg,.preset.s svg{display:none}.preset.w{left:25px;top:43%}.preset.e{right:25px;top:43%}.view-indicator{position:absolute;z-index:4;bottom:108px;left:50%;transform:translateX(-50%);text-align:center;pointer-events:none;padding:9px 13px;background:#122027dc;border:1px solid #2e434b;border-radius:6px;white-space:nowrap}.view-indicator span{font-size:10px;color:#9eafb7;display:block;margin-bottom:5px}.view-indicator strong{font:10px ui-monospace,monospace;color:#d3dedd}.zoom-controls{position:absolute;left:17px;top:53%;z-index:6;display:flex;flex-direction:column;gap:2px}.zoom-controls button{width:26px;height:26px;padding:0;font-size:16px;background:#15232b;opacity:.8}#orientation-note{position:absolute;right:16px;bottom:11px;font-size:8px;color:#758b96;z-index:4}.anatomy-toolbar{padding:15px 17px;display:flex;justify-content:space-between;gap:8px;align-items:center;border-top:1px solid #29343d;flex-wrap:wrap}.toggle-set{display:flex;gap:17px}.toggle-set label{display:flex;gap:6px;font-size:10px;align-items:center;cursor:pointer;color:#b7c2c8}input[type=checkbox]{accent-color:var(--teal);margin:0;width:12px;height:12px}.text-button{padding:0;border:0;color:#9fc8c6;background:transparent!important;font-size:10px}.text-button:hover{text-decoration:underline}.model-bottom{border-top:1px solid #25323b;padding:12px 17px;display:flex;gap:16px;align-items:center;justify-content:space-between;font-size:9px;color:#7f969f}.model-bottom>span{white-space:nowrap}.model-bottom i{font-style:normal;margin:0 4px}.opacity-label{display:flex;gap:7px;align-items:center;white-space:nowrap}.opacity-label input{width:55px;height:3px;accent-color:#668c91}.opacity-label output{font-size:9px;min-width:22px}.right-column{display:flex;flex-direction:column;gap:16px}.live-label{color:#87b4ad;font-size:9px;letter-spacing:1px;display:flex;gap:6px;align-items:center}.live-label i{width:4px;height:4px;border-radius:50%;background:#76c4b7}.projection-tabs{display:flex;padding:8px 16px 0;gap:20px;background:#121b21}.projection-tabs button{border:0;background:none;padding:9px 0 12px;border-radius:0;font-size:10px;color:#7f969f}.projection-tabs button.active{color:#dbe6e5;border-bottom:2px solid #66aea7}.projection-tabs span{font-size:12px;color:#678b8b;margin-left:5px}.projection-stage{position:relative;background:radial-gradient(ellipse,#192328,#0b1217);height:305px}#projection{width:100%;height:100%;overflow:hidden}.image-meta{position:absolute;left:20px;right:20px;top:17px;display:flex;justify-content:space-between;font:9px ui-monospace,monospace;color:#83949b;pointer-events:none}.image-corner{position:absolute;width:12px;height:12px;border-color:#53636b;border-style:solid;opacity:.5;pointer-events:none}.top-left{top:42px;left:15px;border-width:1px 0 0 1px}.top-right{top:42px;right:15px;border-width:1px 1px 0 0}.bottom-left{bottom:35px;left:15px;border-width:0 0 1px 1px}.bottom-right{bottom:35px;right:15px;border-width:0 1px 1px 0}.image-footer{position:absolute;bottom:14px;left:0;right:0;text-align:center;color:#6f838d;font-size:8px;pointer-events:none}.projection-path{fill:none;stroke:#d7dddc;stroke-linecap:round;stroke-linejoin:round;cursor:pointer;transition:opacity .2s}.projection-path:hover{stroke:white}.projection-hit{stroke:transparent;fill:none;stroke-width:15;cursor:pointer}.projection-label{fill:#99aaa9;font:9px ui-monospace,monospace;paint-order:stroke;stroke:#10191e;stroke-width:4px;pointer-events:none}.projection-foot{padding:12px 16px;display:flex;justify-content:space-between;gap:8px;font-size:9px;color:#849da3;border-top:1px solid #28353d}.teaching-panel{padding:20px}.teaching-heading{display:flex;align-items:center;justify-content:space-between;gap:7px}.teaching-heading .eyebrow{font-size:9px}.teaching-panel h3{font-size:17px;letter-spacing:-.3px;font-weight:510;color:#dbe8e6;margin-top:14px}.teaching-panel dl{margin:16px 0 0}.teaching-panel dt{font-size:10px;font-weight:600;color:#a5bebf;margin-top:14px}.teaching-panel dd{font-size:11px;color:#93a5af;margin:5px 0 0;line-height:1.65}.control-dock{margin-top:20px;display:grid;grid-template-columns:190px 1fr 1fr;gap:32px;padding:24px 28px;align-items:center}.control-caption h2{font-size:18px;margin:7px 0 11px;font-weight:500;letter-spacing:-.4px}.control-caption .eyebrow{font-size:8px}.angle-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:19px;gap:10px}.angle-title>label{font-size:11px;color:#b5c3c9}.number-control{display:flex;align-items:center;border:1px solid #35464e;border-radius:5px;padding:5px 7px;background:#101c23;gap:1px;font:10px ui-monospace,monospace}.number-control input{border:0;width:34px;background:none;color:#c5ddd9;padding:0;text-align:right;appearance:textfield;-moz-appearance:textfield;font:inherit}.number-control input::-webkit-inner-spin-button{display:none}.number-control output{color:#83aaa9;font-size:9px;min-width:28px;padding-left:8px}.angle-control>input[type=range]{width:100%;height:3px;display:block;accent-color:var(--teal);cursor:pointer;margin:0}.range-labels{display:flex;justify-content:space-between;color:#758c97;font:9px ui-monospace,monospace;margin-top:12px}.vessel-section{padding:27px 3px 22px;display:grid;grid-template-columns:210px 1fr;gap:15px 20px;border-bottom:1px solid #26343c;align-items:center}.vessel-section>div>p{color:#8ea4ad;font-size:10px;line-height:1.7;margin-top:6px}#vessel-buttons{display:flex;gap:7px;flex-wrap:wrap}#vessel-buttons button{font-size:10px;padding:7px 10px;border:1px solid #32434b;background:#17242b;color:#a8bdc1}#vessel-buttons button:before{content:"";display:inline-block;width:4px;height:4px;border-radius:50%;background:var(--vessel-color);margin-right:6px}#vessel-buttons button.active{background:#304343;color:#eef5ec;border-color:#a5beb0}.selected-vessel{grid-column:2;min-height:50px}.selected-vessel strong{font-size:11px;font-weight:500;color:#afc5c5}#length-metric{font-size:10px;color:#7da6a2;margin-top:7px}.educational-note{display:flex;align-items:center;gap:10px;margin:20px 0;color:#83a0a8;font-size:10px;line-height:1.65}.educational-note>span{font-size:15px}.educational-note a{margin-left:auto;white-space:nowrap;font-size:10px;color:#b7b797}footer{max-width:1500px;margin:auto;display:flex;align-items:flex-start;gap:24px;border-top:1px solid #26343c;padding:23px 42px 32px;color:#617985;font-size:9px;line-height:1.6}footer>span{white-space:nowrap;color:#839aa5}footer i{margin:0 6px;font-style:normal}footer p{max-width:640px}footer button{padding:0;border:0;background:none;color:#91abae;font-size:9px;white-space:nowrap;margin-left:auto}
.film-stage{padding:14px 17px;background:#0d151b;min-height:305px}.film-stage video{width:100%;height:220px;object-fit:contain;background:#05080a;display:block;border-radius:4px}.film-picker{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:10px;color:#96afb7}.film-picker select{flex:1;min-width:0;padding:7px;background:#1c2b34;border:1px solid #3a4c55;border-radius:5px;font-size:10px;color:#cddfdc}.film-credit{font-size:8px!important;color:#8297a0;line-height:1.6;margin-top:9px}.film-credit a{color:#9abdbb}#film-caption{font-size:9px;line-height:1.5;color:#a1b5ba;margin-top:9px}#film-unavailable{padding:44px 18px;text-align:center;height:220px;font-size:13px;color:#b0c3c8}#film-unavailable p{font-size:11px;line-height:1.7;margin-top:12px;color:#8ea6ae}dialog{width:min(680px,calc(100% - 30px));max-height:85vh;border:1px solid #405962;border-radius:14px;background:#17242c;color:#d3e0e2;padding:26px 30px;box-shadow:0 40px 100px #0008}dialog::backdrop{background:#030a10b8;backdrop-filter:blur(4px)}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:20px}.dialog-head button,.tour-top button{border:0;background:transparent;padding:0;font-size:25px;color:#94adaf}#dialog-body h2{font-size:25px;font-weight:500;margin:4px 0 20px;letter-spacing:-.6px}#dialog-body h3{font-size:14px;font-weight:550;margin:22px 0 8px}#dialog-body p,#dialog-body li{font-size:12px;color:#a5bac2;line-height:1.85}#dialog-body ul,#dialog-body ol{padding-left:21px}#dialog-body code{background:#0e1b22;border-radius:4px;padding:3px 5px;font-size:11px}#dialog-body .reference{padding:17px 0;border-bottom:1px solid #33454d}#dialog-body .reference a{font-size:13px}#dialog-body .reference p{font-size:10px;margin-top:5px}.tour-card{position:fixed;bottom:24px;right:30px;width:360px;border:1px solid #668e8c;border-radius:12px;background:#20383e;padding:22px;z-index:20;box-shadow:0 12px 50px #0008}.tour-top{display:flex;justify-content:space-between;align-items:center}.tour-card h3{font-size:19px;font-weight:500;margin:16px 0 9px}.tour-card p{font-size:12px;color:#b4cacb;line-height:1.75}.tour-actions{display:flex;justify-content:space-between;margin-top:21px}.tour-actions button{font-size:11px}.primary{background:#9ad2c9!important;color:#12282c;border-color:#9ad2c9}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip{position:fixed;left:20px;top:-70px;background:#1a343a;color:#fff;padding:12px;z-index:100}.skip:focus{top:10px}.noscript{padding:20px;background:#3c3020;color:#eee}.fallback-note{position:absolute;bottom:35px;left:50%;transform:translateX(-50%);font-size:8px;color:#b6a989;pointer-events:none}
@media(min-width:1450px){.anatomy-stage{height:588px}.preset{width:137px}.preset svg{width:68px;height:40px}.projection-stage{height:326px}.teaching-panel{padding:22px 25px}.teaching-panel dd{font-size:12px}.model-bottom{font-size:10px}}
@media(max-width:1150px){main{padding:26px 24px 0}.header{padding:0 24px;gap:20px}.header-tag{display:none}.header nav{gap:22px}.workspace{grid-template-columns:minmax(0,1.4fr) minmax(315px,1fr);gap:14px}.anatomy-stage{height:548px}.preset{width:105px;padding:9px}.preset strong{font-size:10px}.preset span{font-size:8px}.preset.nw,.preset.sw,.preset.w{left:13px}.preset.ne,.preset.se,.preset.e{right:13px}.axis-label.rao,.axis-label.lao{display:none}.model-bottom{flex-wrap:wrap;justify-content:center;gap:10px}.anatomy-toolbar{justify-content:center;gap:15px}.control-dock{grid-template-columns:150px 1fr 1fr;gap:24px;padding:22px}.model-info{font-size:9px}.opacity-label input{width:80px}.panel-head{padding:16px 14px}.small-badge{font-size:8px}.intro h1{font-size:27px}.intro p{font-size:11px}.tour-button{font-size:11px;padding:11px}.tour-button .muted{display:none}.projection-foot{flex-wrap:wrap}.teaching-panel{padding:17px}.teaching-panel h3{font-size:16px}footer{padding:20px 24px}}
@media(max-width:880px){.workspace{grid-template-columns:1fr}.anatomy-stage{height:570px}.right-column{display:grid;grid-template-columns:1fr 1fr;gap:14px}.projection-stage{height:275px}.preset{width:130px;padding:11px}.preset strong{font-size:11px}.preset span{font-size:9px}.preset.nw,.preset.sw,.preset.w{left:33px}.preset.ne,.preset.se,.preset.e{right:33px}.anatomy-toolbar{justify-content:space-between}.model-bottom{justify-content:space-between}.control-dock{grid-template-columns:1fr 1fr;gap:23px}.control-caption{grid-column:1/-1;display:flex;align-items:center;gap:13px}.control-caption .eyebrow{display:none}.control-caption h2{margin:0}.control-caption button{margin-left:auto}.vessel-section{grid-template-columns:170px 1fr}.model-info .divider{margin:0 3px}.header{height:83px}.brand{font-size:20px}.brand span{font-size:9px}.header nav{font-size:12px;gap:17px}.nav-active:after{bottom:-32px}.header nav button{font-size:11px}.intro{margin-bottom:24px}.teaching-panel dd{font-size:10px}.teaching-panel dt{font-size:9px}.teaching-panel h3{font-size:16px}.teaching-heading .small-badge{display:none}.projection-tabs{gap:12px}.projection-tabs button{font-size:9px}.film-stage video{height:195px}.model-info{max-width:270px;line-height:1.6;flex-wrap:wrap;justify-content:flex-end}}
@media(max-width:590px){.header{padding:0 17px;gap:10px;align-items:center;height:79px}.brand{font-size:17px;gap:8px}.brand svg{width:29px}.brand span{font-size:8px;max-width:160px;line-height:1.6}.header nav{gap:14px}.header nav a{display:none}.header nav button{font-size:9px}.header nav button:first-of-type{display:none}main{padding:25px 14px 0}.intro{display:block}.intro h1{font-size:27px;margin:10px 0}.intro p{max-width:310px;font-size:11px}.intro .eyebrow{font-size:8px}.tour-button{margin-top:17px;padding:7px 11px;font-size:10px}.tour-button>span:first-child{font-size:16px}.workspace-top{align-items:flex-start}.segmented button{min-width:0;padding:8px 10px;font-size:10px}.model-info{max-width:130px;font-size:8px;gap:4px}.model-info .divider{display:none}.anatomy-stage{height:514px}.preset{width:103px;padding:9px}.preset svg{width:54px;height:29px}.preset strong{font-size:10px}.preset span{font-size:8px}.preset.nw,.preset.sw,.preset.w{left:11px}.preset.ne,.preset.se,.preset.e{right:11px}.preset.n,.preset.s{width:94px;padding:7px;top:32px}.preset.s{top:auto;bottom:36px}.preset.nw,.preset.ne{top:94px}.preset.sw,.preset.se{bottom:73px}.view-indicator{bottom:169px}.zoom-controls{left:10px;top:49%}.panel-head{padding:14px 13px}.panel-head h2{font-size:12px}.panel-number{font-size:9px}.anatomy-toolbar{justify-content:center;padding:14px 8px}.toggle-set{gap:20px}.toggle-set label{font-size:10px}.text-button{font-size:9px}.model-bottom{justify-content:center;font-size:8px}.right-column{display:flex}.projection-stage{height:310px}.projection-tabs button{font-size:11px}.teaching-panel{padding:22px}.teaching-panel h3{font-size:18px}.teaching-panel dt{font-size:10px}.teaching-panel dd{font-size:12px}.teaching-heading .small-badge{display:block}.control-dock{grid-template-columns:1fr;padding:20px;gap:27px}.control-caption{grid-column:1}.angle-title{margin-bottom:19px}.range-labels{margin-top:14px}.vessel-section{grid-template-columns:1fr;gap:14px;padding:24px 3px}.selected-vessel{grid-column:1}.vessel-section>div>p{font-size:11px}.educational-note{flex-wrap:wrap;font-size:9px;gap:7px}.educational-note p{flex:1}.educational-note a{width:100%;margin-left:21px}footer{flex-wrap:wrap;padding:20px 17px;gap:10px}footer p{order:3;font-size:8px}footer button{font-size:8px}.tour-card{width:calc(100% - 28px);bottom:14px;right:14px;padding:18px}.tour-card h3{margin:10px 0;font-size:17px}.tour-card p{font-size:11px}.tour-actions{margin-top:13px}dialog{padding:22px}.film-stage video{height:245px}#orientation-note{font-size:7px}.axis-label{font-size:7px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

#patient-axes{position:absolute;left:15px;bottom:8px;width:68px;height:57px;z-index:4;pointer-events:none}#patient-axes text{font:8px ui-monospace,monospace;fill:#8babb2}#patient-axes line{stroke-width:1.2;stroke:#617c85}
@media(max-width:590px){#patient-axes{width:52px;height:46px;left:10px;bottom:6px}}