:root{--deep:#01017c;--blue:#22a9f8;--ink:#18344a;--muted:#52677b;--line:#dbe6ef;--soft:#eff8ff}*{box-sizing:border-box}body{margin:0;font:14px/1.7 system-ui,-apple-system,sans-serif;background:white;color:var(--ink)}[hidden]{display:none!important}.nerve-atlas{max-width:1200px;padding:34px;margin:auto}.eyebrow{font-size:9px;font-weight:750;letter-spacing:2px;color:var(--muted);margin:0 0 15px}header h1{font-size:clamp(28px,4vw,43px);line-height:1.13;letter-spacing:-1.5px;color:var(--deep);margin:0;font-weight:750}header h1>span{font-weight:440}.lead{font-size:14px;color:var(--muted);max-width:790px;margin:19px 0 28px}.journey{border:1px solid var(--line);border-radius:25px;overflow:hidden}.journey-stage{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:15px;background:radial-gradient(ellipse at 40% 55%,white,var(--soft));padding:24px 24px 16px}.journey-stage>div{min-width:0}.stage-tag{font-size:8px;letter-spacing:1.4px;color:var(--muted);font-weight:750;margin:0 0 14px}.eye-image{position:relative}.eye-image>img{display:block;width:100%;height:auto;mix-blend-mode:multiply}.atlas-spot{position:absolute;width:32px;height:32px;border:2px solid var(--blue);border-radius:50%;background:#22a9f81a;transform:translate(-50%,-50%);box-shadow:0 0 0 7px #22a9f80d;opacity:.3}.retina-spot{left:60%;top:33%}.disc-spot{left:73.8%;top:45%}.nerve-spot{left:91%;top:44.5%}.atlas-spot.active{opacity:1;background:#22a9f83d}.atlas-legend{display:flex;justify-content:space-between;gap:8px;color:var(--muted);font-size:9px;margin-top:10px}.detail-panel{padding-left:22px;border-left:1px solid var(--line);display:flex;flex-direction:column;justify-content:center}svg{display:block;width:100%;height:auto}.detail-panel>svg{max-height:320px}.detail-label{font-size:11px;color:var(--deep);font-weight:650;text-align:center;margin:5px 0 0;min-height:38px}.detail-panel #brain-zoom svg{max-height:260px}.detail-panel #brain-zoom p{font-size:12px;text-align:center;color:var(--muted);max-width:280px;margin:0 auto 8px}.interactive-controls{padding:20px 24px 0}.journey-buttons{display:grid;grid-template-columns:minmax(0,1fr) 12px minmax(0,1fr) 12px minmax(0,1fr) 12px minmax(0,1fr);gap:7px;align-items:center}.journey-buttons button{display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:14px;min-height:49px;background:white;padding:9px 12px;font:650 11px system-ui;color:var(--deep);cursor:pointer}.journey-buttons button>span{font-size:9px;display:grid;place-items:center;background:var(--soft);min-width:23px;height:23px;border-radius:50%;color:var(--deep)}.journey-buttons button[aria-pressed=true]{background:var(--deep);color:white;border-color:var(--deep)}.journey-buttons b{font-size:13px;font-weight:400;color:var(--blue)}.manual-control{display:grid;grid-template-columns:150px minmax(0,1fr) 220px;align-items:center;gap:15px;margin-top:18px}.manual-control>label{font-size:10px;font-weight:650;color:var(--deep)}input{width:100%;height:44px;accent-color:var(--deep);cursor:pointer}.manual-control>span{font-size:9px;text-align:right;color:var(--muted)}.journey-readout{display:flex;gap:20px;padding:18px 24px 10px;min-height:182px}.journey-readout>span{font-size:44px;line-height:1;font-weight:400;color:var(--deep);letter-spacing:-2px;margin-top:5px;min-width:52px}.journey-readout .eyebrow{font-size:8px;margin:0 0 6px}.journey-readout h3{font-size:29px;line-height:1.2;letter-spacing:-.7px;margin:0 0 12px;color:var(--deep)}.journey-readout p:not(.eyebrow){font-size:12px;line-height:1.8;color:var(--muted);max-width:870px;margin:0}.journey-note{font-size:9px;line-height:1.75;color:var(--muted);margin:0 24px 23px;border-top:1px solid var(--line);padding-top:13px}.fundus-section{padding-top:32px}.fundus-heading>h2{font-size:32px;line-height:1.2;letter-spacing:-.8px;color:var(--deep);margin:0 0 14px}.fundus-heading>p:last-child{font-size:14px;color:var(--muted);max-width:750px;margin:0 0 23px}.fundus-layout{display:grid;grid-template-columns:minmax(0,1.13fr) minmax(0,.87fr);align-items:center;gap:32px}.fundus-frame{position:relative;overflow:hidden;border-radius:25px;background:#050607;isolation:isolate;aspect-ratio:1}.fundus-transform{position:relative;transform-origin:83.5% 51%}.fundus-transform>img{display:block;width:100%;height:auto}.fundus-transform>svg{position:absolute;inset:0}.disc-ring{fill:none;stroke:#22a9f8;stroke-width:3}.macula-ring{fill:none;stroke:white;stroke-width:2.3;stroke-dasharray:8 8;opacity:.85}.disc-callout{fill:white;stroke:white;stroke-width:2.5}.macula-callout{fill:white;stroke:white;stroke-width:2}.fundus-transform path{fill:none}.fundus-transform text{font-weight:650;stroke:none;paint-order:stroke;filter:drop-shadow(0 1px 3px #000)}.fundus-transform.is-close{transform:translateX(-33.5%) scale(2.4)}.fundus-transform.is-close .macula-callout,.fundus-transform.is-close .macula-ring,.fundus-transform.is-close .disc-callout{opacity:0}.photo-badge{position:absolute;left:16px;bottom:14px;margin:0;color:white;letter-spacing:1.2px;font-size:8px;font-weight:700;background:#0008;padding:6px 9px;border-radius:7px}.photo-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin-bottom:28px}.photo-controls>button{min-height:46px;border:1px solid var(--line);background:white;border-radius:12px;padding:9px 10px;font:650 10px system-ui;color:var(--deep);cursor:pointer}.photo-controls>button[aria-pressed=true]{background:var(--deep);color:white;border-color:var(--deep)}.disc-explanation .eyebrow{font-size:8px}.disc-explanation h3{font-size:27px;line-height:1.2;letter-spacing:-.7px;color:var(--deep);margin:0 0 17px}.disc-explanation>p:not(.eyebrow){font-size:12px;line-height:1.8;color:var(--muted);margin:0 0 15px}.disc-explanation>p.photo-limit{font-size:10px;border-left:2px solid var(--blue);padding-left:12px}.source{font-size:10px;color:var(--muted);line-height:1.8;margin:16px 0 0}.source a{color:var(--deep);text-underline-offset:3px}.text-guide{margin-top:28px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0}.text-guide>summary{cursor:pointer;font-size:12px;color:var(--deep);font-weight:650;display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:44px}.text-guide dl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:20px}.text-guide dt{font-weight:650;font-size:12px;color:var(--deep)}.text-guide dd{margin:6px 0 0;font-size:11px;color:var(--muted);line-height:1.8}footer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px 24px;padding-top:20px;color:var(--muted)}footer p{font-size:9px;line-height:1.75;margin:0}footer span{font-size:8px;font-weight:750;letter-spacing:1px;white-space:nowrap;color:var(--deep)}footer b{color:var(--blue)}footer p:last-child{grid-column:1/-1}.static-diagram{display:block;width:100%;height:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}button:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
@media(max-width:680px){.nerve-atlas{padding:25px 16px 22px}.eyebrow{font-size:8px;letter-spacing:1.6px}header h1{font-size:29px;letter-spacing:-1.15px}.lead{font-size:13px;line-height:1.8;margin:17px 0 24px}.journey-stage{grid-template-columns:minmax(0,1fr);gap:19px;padding:20px 14px 17px}.stage-tag{font-size:7px;letter-spacing:1px}.detail-panel{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.detail-panel>svg{max-width:340px;max-height:255px;margin:auto}.detail-label{font-size:11px;margin-top:9px;min-height:25px}.atlas-spot{width:23px;height:23px;box-shadow:0 0 0 5px #22a9f80d}.atlas-legend{font-size:8px}.interactive-controls{padding:17px 14px 0}.journey-buttons{grid-template-columns:minmax(0,1fr) 10px minmax(0,1fr);gap:7px}.journey-buttons>b:nth-of-type(2){display:none}.journey-buttons>b:nth-of-type(3){grid-column:2;grid-row:2}.journey-buttons>button:last-child{grid-column:3;grid-row:2}.journey-buttons>button{min-height:48px;font-size:9px;padding:8px 7px;gap:6px}.journey-buttons button>span{height:20px;min-width:20px;font-size:8px}.manual-control{grid-template-columns:minmax(0,1fr);gap:0;margin-top:19px}.manual-control>label{font-size:10px}.manual-control>span{text-align:left;font-size:8px;margin-top:-5px}.journey-readout{padding:23px 14px 14px;gap:12px;min-height:243px}.journey-readout>span{font-size:34px;min-width:40px}.journey-readout .eyebrow{font-size:7px;letter-spacing:1.1px}.journey-readout h3{font-size:25px}.journey-readout p:not(.eyebrow){font-size:12px;line-height:1.85}.journey-note{font-size:9px;margin:0 14px 21px}.fundus-section{padding-top:29px}.fundus-heading>h2{font-size:28px;letter-spacing:-.7px}.fundus-heading>p:last-child{font-size:13px;line-height:1.8}.fundus-layout{grid-template-columns:minmax(0,1fr);gap:22px}.fundus-frame{border-radius:21px}.photo-badge{font-size:7px;left:11px;bottom:10px;letter-spacing:.8px}.photo-controls{margin-bottom:25px}.photo-controls>button{font-size:10px}.disc-explanation h3{font-size:26px}.disc-explanation>p:not(.eyebrow){font-size:12px}.source{font-size:9px}.text-guide>summary{font-size:11px}.text-guide dl{grid-template-columns:minmax(0,1fr);gap:18px}.text-guide dd{font-size:11px}.text-guide dt{font-size:12px}footer{grid-template-columns:minmax(0,1fr);gap:13px}footer p{font-size:9px}footer p:last-child{grid-column:auto}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

.fundus-layout>*,.manual-control>*,.text-guide dl>*,footer>*{min-width:0}