:root{--bg:#f7f8fa;--surface:#fff;--surface-2:#eef2f6;--text:#17202a;--muted:#5b6776;--border:#d9e0e8;--accent:#1f5f8b;--accent-strong:#164a6d;--accent-soft:#e3eef7;--warn-soft:#fff4dc;--warn:#8a5a00;--ok:#1d7a46;--bad:#b3261e;--radius:10px;--shadow:0 1px 2px #1018280f, 0 1px 3px #10182814;--font:"Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--serif:"Source Serif 4", Georgia, "Times New Roman", serif;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#0f141a;--surface:#161d25;--surface-2:#1d2630;--text:#e6ebf0;--muted:#9aa7b4;--border:#2a3542;--accent:#6fb1e0;--accent-strong:#9ccbee;--accent-soft:#1b2f40;--warn-soft:#3a2e14;--warn:#f0c46b;--ok:#5fcf8f;--bad:#ff8a80;--shadow:none;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font:16px/1.6 var(--font);flex-direction:column;min-height:100vh;margin:0;display:flex}a{color:var(--accent)}a:hover{color:var(--accent-strong)}img{max-width:100%;height:auto}h1,h2,h3,h4{line-height:1.25}h1{margin:.2em 0 .4em;font-size:clamp(1.7rem,3vw,2.3rem)}:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.skip{background:var(--surface);z-index:10;padding:8px 12px;position:absolute;top:0;left:-999px}.skip:focus{left:8px}.site-header{z-index:5;background:color-mix(in srgb, var(--surface) 92%, transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:16px;padding:10px max(16px,50vw - 560px);display:flex;position:sticky;top:0}.brand{letter-spacing:.08em;color:var(--text);align-items:center;gap:8px;font-weight:750;text-decoration:none;display:flex}.brand svg{width:30px;height:30px;fill:var(--accent);stroke:var(--accent);stroke-width:2.4px}.brand svg path{fill:none}.site-header nav{flex-wrap:wrap;gap:4px;display:flex}.site-header nav a{color:var(--muted);border-radius:8px;padding:6px 10px;font-weight:550;text-decoration:none}.site-header nav a:hover{background:var(--surface-2);color:var(--text)}.site-header nav a.active{background:var(--accent-soft);color:var(--accent-strong)}main{flex:1;width:100%;max-width:1120px;margin:0 auto;padding:24px 16px 48px}main:focus{outline:none}.site-footer{border-top:1px solid var(--border);color:var(--muted);text-align:center;padding:16px;font-size:.85rem}.lede{color:var(--muted);max-width:62ch;font-size:1.15rem}.crumbs{color:var(--muted);margin-bottom:4px;font-size:.9rem}.crumbs a{color:var(--muted)}.hero{grid-template-columns:1.3fr 1fr;align-items:center;gap:24px;padding:16px 0 8px;display:grid}.hero img{border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}@media (width<=760px){.hero{grid-template-columns:1fr}}.cta{flex-wrap:wrap;gap:12px;margin-top:16px;display:flex}.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit;cursor:pointer;border-radius:8px;align-items:center;gap:6px;padding:9px 16px;font-weight:600;text-decoration:none;display:inline-flex}.btn:hover{border-color:var(--accent);color:var(--accent-strong)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover{background:var(--accent-strong);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed}@media (prefers-color-scheme:dark){.btn.primary,.btn.primary:hover{color:#0f141a}}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px}.grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;display:grid}.section{margin-top:36px}.nerve-tile{color:inherit;align-items:flex-start;gap:14px;text-decoration:none;transition:border-color .15s,transform .15s;display:flex}.nerve-tile:hover{border-color:var(--accent);transform:translateY(-1px)}.numeral{background:var(--accent-soft);width:46px;height:46px;color:var(--accent-strong);font-weight:750;font-family:var(--serif);border-radius:10px;flex:none;place-items:center;display:grid}.nerve-tile h3{margin:2px 0 4px;font-size:1.05rem}.nerve-tile p{color:var(--muted);margin:0;font-size:.9rem}.tabs{border-bottom:1px solid var(--border);scrollbar-width:thin;gap:2px;margin:20px 0 0;display:flex;overflow-x:auto}.tabs button{font:inherit;color:var(--muted);cursor:pointer;white-space:nowrap;background:0 0;border:0;border-bottom:3px solid #0000;padding:10px 14px;font-weight:600}.tabs button[aria-selected=true]{color:var(--accent-strong);border-bottom-color:var(--accent)}.tabpanel{padding-top:20px}.prose{max-width:75ch}.prose h3{margin-top:1.6em}.prose table{border-collapse:collapse;width:100%;font-size:.92rem;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--border);text-align:left;vertical-align:top;padding:6px 10px}.prose th{background:var(--surface-2)}.prose figure{margin:1.4em 0}.prose figcaption{color:var(--muted);font-size:.88rem}.prose img{background:#fff;border-radius:8px}.notice{background:var(--warn-soft);color:var(--warn);border-radius:var(--radius);padding:14px 16px}.notice strong{color:inherit}.muted{color:var(--muted)}.pager{justify-content:space-between;gap:12px;margin-top:36px;display:flex}.quiz-q{margin-bottom:18px}.quiz-q fieldset{border:0;margin:0;padding:0}.quiz-q legend{margin-bottom:8px;font-weight:650}.quiz-q label{border:1px solid var(--border);cursor:pointer;border-radius:8px;align-items:flex-start;gap:10px;margin-bottom:6px;padding:8px 10px;display:flex}.quiz-q label.correct{border-color:var(--ok)}.quiz-q label.wrong{border-color:var(--bad)}.quiz-q .explain{color:var(--muted);margin-top:6px;font-size:.92rem}.patient-card{color:inherit;flex-direction:column;gap:10px;text-decoration:none;display:flex}.patient-card:hover{border-color:var(--accent)}.patient-card img{aspect-ratio:4/3;object-fit:cover;background:var(--surface-2);border-radius:8px;width:100%}.patient-card h3{margin:0}.patient-card p{color:var(--muted);margin:0}.encounter{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:start;gap:18px;display:grid}@media (width<=860px){.encounter{grid-template-columns:1fr}}.encounter-head{align-items:center;gap:16px;display:flex}.encounter-head img{object-fit:cover;background:var(--surface-2);border-radius:50%;width:84px;height:84px}.chat{flex-direction:column;height:min(62vh,620px);padding:0;display:flex;overflow:hidden}.chat-log{flex-direction:column;flex:1;gap:10px;padding:16px;display:flex;overflow-y:auto}.msg{white-space:pre-wrap;overflow-wrap:anywhere;border-radius:14px;max-width:85%;padding:9px 13px}.msg.student{background:var(--accent);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}@media (prefers-color-scheme:dark){.msg.student{color:#0f141a}}.msg.patient{background:var(--surface-2);border-bottom-left-radius:4px;align-self:flex-start}.msg.system{color:var(--muted);background:0 0;align-self:center;font-size:.88rem}.msg.error{color:var(--bad);align-self:center;font-size:.9rem}.typing:after{content:"…";animation:1s steps(2,end) infinite blink}@keyframes blink{50%{opacity:.2}}.chat-form{border-top:1px solid var(--border);gap:8px;padding:10px;display:flex}.chat-form textarea{resize:none;font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;flex:1;min-height:42px;max-height:140px;padding:8px 10px}.exam-list{flex-direction:column;gap:6px;display:flex}.exam-item button{text-align:left;justify-content:space-between;width:100%}.exam-item .finding{margin:6px 2px 4px;font-size:.93rem}.dx-form{gap:10px;display:grid}.dx-form select,.dx-form textarea,.dx-form input{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:8px 10px}.chips{flex-wrap:wrap;gap:6px;display:flex}.chips label{border:1px solid var(--border);cursor:pointer;border-radius:999px;padding:3px 10px;font-size:.9rem}.chips input{margin-right:4px}.stack>*+*{margin-top:16px}.placeholder3d{text-align:center;border:2px dashed var(--border);border-radius:var(--radius);min-height:300px;color:var(--muted);place-items:center;gap:8px;padding:24px;display:grid}.verdict{border-radius:var(--radius);border:1px solid;padding:12px 14px}.verdict.ok{border-color:var(--ok);color:var(--ok)}.verdict.bad{border-color:var(--bad);color:var(--bad)}.verdict strong{color:inherit}.exam-list details{border-bottom:1px solid var(--border);padding:6px 0}.exam-list details:last-child{border-bottom:0}.exam-list summary{cursor:pointer;padding:4px 2px}.exam-list .exam-item{margin:6px 0 0}