:root{color-scheme:dark;--bg:#080e1a;--panel:#101d2c;--ink:#e9f0f7;--muted:#a8bacd;--line:#26394d;--cyan:#21cce6;--gold:#f0cb84}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 'Inter Tight',Arial,sans-serif}a{color:inherit;text-underline-offset:5px}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:6px}button{font:inherit;color:inherit;cursor:pointer}h1,h2,h3,p,figure{margin:0}h1,h2{font-family:'Instrument Serif',Georgia,serif;font-weight:400;line-height:1.05;letter-spacing:-.025em}h1{font-size:clamp(48px,5.9vw,84px)}h1 em{display:block;color:var(--cyan);font-weight:400}h2{font-size:clamp(37px,4.2vw,62px);margin:14px 0 30px}h2 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1fr;gap:60px;align-items:start}.region-visual{position:sticky;top:115px}.anatomy-plate{background:radial-gradient(ellipse,#12263b,#0a1422);border:1px solid var(--line);border-radius:20px;overflow:hidden}.anatomy-plate svg{width:100%;display:block}.anatomy-plate figcaption{font-size:12px;line-height:1.65;padding:5px 22px 24px;color:var(--muted)}.visual-note{font-size:12px;margin-top:16px}.small .canvas-wrap{height:335px}.nerve-card{padding:30px 0;border-bottom:1px solid var(--line)}.nerve-card:first-child{padding-top:0}.nerve-card:last-child{border:0;padding-bottom:0}.nerve-card h3{font-family:'Instrument Serif',Georgia,serif;font-size:34px;color:var(--ink);margin-bottom:16px}.nerve-card p{font-size:16px}.nerve-card dl{margin:22px 0 0;display:grid;grid-template-columns:150px 1fr;gap:14px;font-size:14px;line-height:1.65}.nerve-card dt{color:var(--cyan)}.nerve-card 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article{background:linear-gradient(135deg,#132336,#0b1725);border:1px solid var(--line);border-radius:15px;padding:28px}.treatment-grid h3{font-family:'Instrument Serif',Georgia,serif;font-size:33px;margin:20px 0}.treatment-grid p{font-size:15px}.urgent{background:radial-gradient(ellipse at left,#302622,transparent 75%);padding:40px!important;border:1px solid #68574a!important;border-radius:18px;margin-top:65px}.urgent .kicker{color:var(--gold)}.urgent h2 em{color:var(--gold)}.urgent p{max-width:920px}.preparation{max-width:880px}.sources{font-size:13px;line-height:1.8}.sources h2{font-size:30px}.sources li{margin-bottom:14px}.sources p{max-width:980px}footer{display:flex;gap:25px;justify-content:space-between;flex-wrap:wrap;padding:35px 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.nerve-view{max-width:600px;width:100%}.canvas-wrap{height:330px}.shell{width:calc(100% - 40px)}.region-nav{grid-template-columns:1fr 1fr}.region-nav a{font-size:18px;padding:18px!important}.region-nav a:nth-child(2){border-right:0}.region-nav a:nth-child(-n+2){border-bottom:1px solid var(--line)}.subnav{gap:18px;padding:22px 0}.explain{grid-template-columns:1fr;gap:30px}section:not(.hero){padding:55px 0}.region-layout{grid-template-columns:1fr;gap:30px}.region-visual{position:static;max-width:600px;width:100%}.anatomy-plate svg{max-height:360px}.small .canvas-wrap{height:300px}.nerve-card h3{font-size:31px}.nerve-card dl{grid-template-columns:130px 1fr;gap:12px}.steps{grid-template-columns:1fr 1fr;gap:28px}.treatment-grid{grid-template-columns:1fr}.urgent{padding:25px!important}.urgent h2{font-size:38px}footer{padding:30px 20px}.sources ol{padding-left:20px}}@media(max-width:400px){.brand-mark{display:none}.site-header nav{gap:10px}.brand{font-size:20px}.nerve-card dl{grid-template-columns:1fr;gap:5px}.steps{grid-template-columns:1fr 1fr;gap:20px}summary{font-size:17px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

.model-legend{font:11px/1.6 'Inter Tight',Arial,sans-serif;padding:0 20px 12px;color:var(--gold)}.mini-plate{padding:20px;background:#101d2c;border:1px solid var(--line);border-radius:18px;margin-top:35px}.mini-plate svg{width:100%;height:auto;display:block;max-height:360px}.mini-plate figcaption{color:var(--muted);font-size:13px;line-height:1.7;margin-top:15px}section{position:relative}#section-0,#section-1,#section-2,#section-3{position:absolute}.related-reading{width:min(1240px,calc(100% - 88px));margin:0 auto;padding:0 0 50px}.related-reading h2{font-size:28px}.related-reading a{color:var(--cyan)}@media(max-width:760px){.related-reading{width:calc(100% - 40px)}.mini-plate{padding:12px}}

.view-label{background:#0a1422dd;padding:4px 7px;border-radius:5px;top:15px;left:16px}
/* Atlas-based 3D anatomy, slow automatic rotation. */
.hero .canvas-wrap{height:620px}.small .canvas-wrap{height:460px}.canvas-fallback{display:grid;place-items:center;padding:35px;font-size:14px;text-align:center}.model-legend{color:#fff000}.nerve-view figcaption{padding-bottom:22px}.view-controls{display:none}@media(max-width:760px){.hero .canvas-wrap{height:520px}.small .canvas-wrap{height:440px}}
.canvas-fallback{padding:0;inset:45px 0 0}.canvas-fallback img{width:100%;height:100%;object-fit:contain;display:block}
.surgeon-approach{padding:32px;border:1px solid #2e778c;border-radius:20px;background:linear-gradient(130deg,#12303e,#0a1725);margin:30px 0}.surgeon-approach h3{font:36px/1.15 'Instrument Serif',Georgia,serif;margin:16px 0 22px}.surgeon-signature{display:block;margin-top:20px;color:var(--cyan);font-size:14px}.operative-zones{margin-top:35px;padding:25px;background:#101f2d;border:1px solid #294959;border-radius:18px}.operative-zones h3{font:29px/1.15 'Instrument Serif',Georgia,serif;margin:12px 0 22px}.operative-zones ol{list-style:none;padding:0;margin:0}.operative-zones li{display:flex;align-items:start;gap:13px;margin:22px 0;scroll-margin-top:120px}.zone-number{border:1px solid var(--cyan);border-radius:50%;color:var(--cyan);font:11px monospace;min-width:27px;height:27px;display:grid;place-items:center}.operative-zones h4{margin:0 0 9px;font-size:15px;color:var(--ink)}.operative-zones p{font-size:14px;line-height:1.7}.operative-zones .zone-note{font-size:12px;margin-top:20px}.anatomy-markers{position:absolute;inset:0;z-index:3;pointer-events:none}.anatomy-marker{position:absolute;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;border:1px solid #62e7ff;background:#071726e8;color:#8eeeff;font:11px monospace;text-decoration:none;pointer-events:auto;box-shadow:0 0 14px #21cce633}.anatomy-marker:before{content:'';position:absolute;width:5px;height:5px;border-radius:50%;background:#62e7ff;left:-6px;top:12px}.anatomy-markers:empty{display:none}@media(max-width:760px){.surgeon-approach{padding:23px}.operative-zones{padding:20px}}