:root{--bg:#0b0f13;--panel:#10161c;--raised:#16202a;--line:#223040;--line-2:#2d3e50;--text:#dde6ec;--muted:#8b9cab;--faint:#5d6e7d;--work:#46c2c7;--work-bg:#46c2c71f;--danger:#ff5a63;--danger-bg:#ff5a631f;--steel:#c9d1d9;--pearl:#e3b765;--sans:"IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--cond:"IBM Plex Sans Condensed", "Arial Narrow", var(--sans);--mono:"IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body{height:100%;margin:0}body{background:var(--bg);color:var(--text);font:14px/1.5 var(--sans);-webkit-font-smoothing:antialiased;overflow:hidden}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:0}button:focus-visible,input:focus-visible,summary:focus-visible,label.btn:focus-within{outline:2px solid var(--work);outline-offset:2px}[hidden]{display:none!important}#app{grid-template:"top top top""ct stage panel"1fr/minmax(300px,34%) 1fr minmax(320px,360px);height:100%;display:grid}#topbar{padding:8px 16px;padding-top:calc(8px + env(safe-area-inset-top,0px));border-bottom:1px solid var(--line);background:var(--panel);flex-wrap:wrap;grid-area:top;align-items:center;gap:12px;display:flex}.brand{align-items:baseline;gap:8px;margin-right:8px;display:flex}.brand b{font:600 18px/1 var(--cond);letter-spacing:.02em}.brand span{color:var(--muted);font-size:12px}.spacer{flex:1}.seg{border:1px solid var(--line-2);border-radius:6px;display:inline-flex;overflow:hidden}.seg button{color:var(--muted);border-right:1px solid var(--line-2);padding:5px 11px;font-size:13px}.seg button:last-child{border-right:0}.seg button[aria-pressed=true]{background:var(--raised);color:var(--text);box-shadow:inset 0 -2px 0 var(--work)}.seg button:hover{color:var(--text)}.seg.small button{padding:3px 8px;font-size:12px}.btn{border:1px solid var(--line-2);cursor:pointer;white-space:nowrap;border-radius:6px;align-items:center;gap:6px;padding:6px 12px;font-size:13px;display:inline-flex}.btn:hover{border-color:var(--muted)}.btn.primary{background:var(--work);color:#06221f;border-color:var(--work);font-weight:600}.btn.primary:disabled{opacity:.35;cursor:default}.btn.ghost:disabled{opacity:.3;cursor:default}.btn.staple{color:#111820;background:linear-gradient(#dfe5ea,#aab4bd);border-color:#dfe5ea;font-weight:600}.link{color:var(--work);text-underline-offset:2px;padding:0 2px;font-size:12px;text-decoration:underline}#ct{border-right:1px solid var(--line);background:#000;flex-direction:column;grid-area:ct;min-height:0;display:flex;position:relative}.ct-bar{background:var(--panel);flex-wrap:wrap;align-items:center;gap:8px;padding:8px 10px;display:flex}.ct-bar.lower{border-top:1px solid var(--line)}.ct-bar .hint{color:var(--faint);margin-left:auto;font-size:11px}.chip-toggle{border:1px solid var(--line-2);color:var(--muted);border-radius:99px;padding:3px 9px;font-size:12px}.chip-toggle.on{color:var(--text);border-color:var(--work);background:var(--work-bg)}.ct-main{flex:1;min-height:200px;position:relative}.ct-main canvas{object-fit:contain;cursor:crosshair;touch-action:none;width:calc(100% - 44px);height:calc(100% - 44px);position:absolute;inset:22px}.edge{font:500 11px var(--mono);color:var(--pearl);position:absolute}.edge.t{top:4px;left:50%}.edge.b{bottom:4px;left:50%}.edge.l{top:50%;left:7px}.edge.r{top:50%;right:7px}.ct-hud{font:11px/1.35 var(--mono);color:var(--muted);pointer-events:none;flex-direction:column;gap:1px;max-width:45%;display:flex;position:absolute;top:4px;left:10px}.ct-hud .under{color:var(--work)}.ct-minis{background:var(--line);grid-template-columns:1fr 1fr;gap:1px;height:24%;min-height:110px;display:grid}.mini{background:#000;padding:0;position:relative;overflow:hidden}.mini canvas{object-fit:contain;pointer-events:none;width:100%;height:100%;display:block}.mini-lab,.mini-ro{font:10px var(--mono);color:var(--muted);text-transform:capitalize;position:absolute;left:6px}.mini-lab{top:4px}.mini-ro{text-transform:none;bottom:4px}.mini:hover{outline:1px solid var(--work);outline-offset:-1px}.drop-hint{border:2px dashed var(--work);font:600 15px var(--cond);color:var(--work);background:#061e1eb3;border-radius:10px;justify-content:center;align-items:center;display:none;position:absolute;inset:12px}#ct.dragging .drop-hint{display:flex}#ct.aligning .ct-main canvas{cursor:cell}#ct.aligning .ct-main:after{content:"Click the carina";font:600 12px var(--cond);color:#06221f;background:var(--work);border-radius:4px;padding:2px 8px;position:absolute;top:6px;right:10px}#stage{grid-area:stage;min-width:0;min-height:0;position:relative}#view3d{position:absolute;inset:0}#view3d canvas{width:100%;height:100%;display:block}#hover{font:12px var(--mono);color:var(--muted);pointer-events:none;position:absolute;bottom:10px;left:12px}#status{font:500 14px var(--mono);color:var(--muted);background:var(--bg);place-items:center;display:grid;position:absolute;inset:0}.labels3d{pointer-events:none;position:absolute;inset:0;overflow:hidden}.lab3d{font:500 12px/1.2 var(--cond);white-space:nowrap;border-left:2px solid var(--muted);color:var(--text);background:#0b0f13d1;border-radius:3px;margin:-10px 0 0 10px;padding:2px 7px;position:absolute;top:0;left:0}.lab3d.hi{border-color:var(--work);color:#d8fbfb}.lab3d.danger{border-color:var(--danger);color:#ffd6d9}.upload-note{border:1px solid var(--line-2);z-index:2;background:#10161cf0;border-radius:8px;flex-wrap:wrap;align-items:baseline;gap:4px 10px;padding:9px 12px;font-size:13px;display:flex;position:absolute;top:12px;left:12px;right:12px}.upload-note span{color:var(--muted)}.upload-note .align-cta{color:var(--work);font-weight:500}.upload-note.err{border-color:var(--danger)}#panel{border-left:1px solid var(--line);background:var(--panel);grid-area:panel;padding:16px 18px 24px;overflow-y:auto}.proc-head h2{font:600 22px/1.15 var(--cond);text-wrap:balance;margin:4px 0 12px}.eyebrow{font:500 11px var(--mono);color:var(--muted);letter-spacing:.04em;text-transform:uppercase}.body{color:#c9d4dc}.body p{margin:0 0 10px}.body b,.body strong{color:var(--text)}.body.veiled{display:none}.veil-note{color:var(--muted);margin:2px 0 8px;font-size:12px}.ask{border:1px solid var(--line-2);background:var(--raised);border-radius:8px;margin:0 0 14px;padding:12px}.ask.nudge{border-color:var(--work);animation:.4s nudge}@keyframes nudge{25%{transform:translate(-4px)}75%{transform:translate(4px)}}.ask .q{margin-bottom:8px;font-weight:600}.choices{gap:6px;display:grid}.choice{text-align:left;border:1px solid var(--line-2);background:var(--panel);border-radius:6px;padding:7px 10px}.choice:hover:not(:disabled){border-color:var(--work)}.choice.right{border-color:var(--work);background:var(--work-bg)}.choice.wrong{border-color:var(--danger);background:var(--danger-bg)}.choice.dim{opacity:.45}.choice:disabled{cursor:default}.why{color:#c9d4dc;margin:10px 0 0;font-size:13px}.why.ok b{color:var(--work)}.why.no b{color:var(--danger)}.legend{font:11px var(--mono);color:var(--muted);gap:14px;margin:6px 0;display:flex}.legend .k:before{content:"";vertical-align:-1px;border-radius:2px;width:9px;height:9px;margin-right:6px;display:inline-block}.legend .hi:before{background:var(--work)}.legend .danger:before{background:var(--danger)}.chips{flex-wrap:wrap;gap:6px;margin:4px 0 12px;display:flex}.chip{border:1px solid var(--line-2);border-radius:99px;padding:3px 9px;font-size:12px}.chip.hi{border-color:var(--work);background:var(--work-bg)}.chip.danger{border-color:var(--danger);background:var(--danger-bg)}.chip i,.tree i{color:var(--faint);font-style:italic}.pearl{border-left:2px solid var(--pearl);color:#e8d6ae;margin:0 0 14px;padding:2px 0 2px 10px;font-size:13px}.nav{border-top:1px solid var(--line);background:var(--panel);align-items:center;gap:8px;margin-top:6px;padding:10px 0;display:flex;position:sticky;bottom:-24px}.nav .primary{margin-left:auto}.outline{margin-top:8px}.outline summary{cursor:pointer;color:var(--muted);font-size:12px}.steps{gap:2px;margin:8px 0 0;padding:0;list-style:none;display:grid}.steps button{text-align:left;width:100%;color:var(--muted);border-radius:4px;gap:10px;padding:4px 6px;font-size:13px;display:flex}.steps .n{font:500 11px var(--mono);text-align:right;width:18px;color:var(--faint);padding-top:2px}.steps li.done button{color:#9fb0bd}.steps li.done .n{color:var(--work)}.steps li.cur button{background:var(--raised);color:var(--text)}.steps button:hover{color:var(--text)}.foot{color:var(--faint);margin-top:16px;font-size:11px}.tree details{border-top:1px solid var(--line);padding:6px 0}.tree summary{cursor:pointer;font:600 13px var(--cond);letter-spacing:.02em;justify-content:space-between;padding:2px 0;display:flex}.tree-items{gap:1px;margin:4px 0;display:grid}.tree-row{border-radius:4px;align-items:center;gap:8px;padding:2px 4px;display:flex}.tree-row.sel{background:var(--work-bg)}.tree-row .sw{border-radius:2px;flex:none;width:9px;height:9px}.tree-row .name{text-align:left;color:#c9d4dc;font-size:13px}.tree-row input{accent-color:var(--work);margin:0}@media (width<=1000px){body{overflow:auto}#app{grid-template-columns:1fr;grid-template-areas:"top""stage""ct""panel";height:auto}#stage{height:55vh}#ct{border-right:0;height:75vh}#panel{border-left:0;border-top:1px solid var(--line);overflow:visible}.nav{position:static}}@media (prefers-reduced-motion:reduce){.ask.nudge{animation:none}}.lab3d.shifted{border-left-style:dashed}.seqstrip{flex-wrap:wrap;align-items:center;gap:4px;margin:0 0 14px;padding:0;list-style:none;display:flex}.seqstrip li{align-items:center;display:flex}.seqstrip li+li:before{content:"→";color:var(--faint);margin:0 4px 0 0;font-size:12px}.seqstrip button{font:600 12px var(--cond);letter-spacing:.02em;border:1px solid var(--line-2);color:var(--muted);background:0 0;border-radius:4px;padding:4px 8px}.seqstrip .artery button{border-color:#5068b4}.seqstrip .vein button{border-color:#9a2e48}.seqstrip .bronchus button{border-color:#ece3d1}.seqstrip .fissure button{border-color:#f4e3a1}.seqstrip .done button{color:var(--text);opacity:.55;text-decoration:line-through;text-decoration-thickness:1px}.seqstrip .cur button{color:#0b0f13;opacity:1;text-decoration:none}.seqstrip .cur.artery button{color:#fff;background:#5068b4}.seqstrip .cur.vein button{color:#fff;background:#9a2e48}.seqstrip .cur.bronchus button{background:#ece3d1}.seqstrip .cur.fissure button{background:#f4e3a1}.seqstrip .cur.other button{background:var(--work)}.btn.staple:disabled{opacity:.6}body.proc #view3d:after{content:"";pointer-events:none;background:radial-gradient(72% 78%,#0000 62%,#0403038c 88%,#040303d9 100%);position:absolute;inset:0}
