/* Site-shell integration of the approved 9 October prototype. All rules are scoped. */
.oncology-interactive{--ink:#243d3b;--deep:#184d49;--paper:#fffcf5;--cream:#f3efe6;--accent:#965438;--line:#bcbfb2;max-width:1280px;margin:auto;padding:0 30px;color:var(--ink);font:18px/1.55 'Source Sans 3',system-ui,sans-serif}
.oncology-interactive *{box-sizing:border-box}
.oncology-interactive a{color:var(--deep);text-underline-offset:4px}
.oncology-interactive button,.oncology-interactive input{font:inherit}
.oncology-interactive button,.oncology-interactive a,.oncology-interactive input{touch-action:manipulation}
.oncology-interactive button:focus-visible,.oncology-interactive a:focus-visible,.oncology-interactive input:focus-visible{outline:3px solid var(--accent);outline-offset:5px}
.oncology-interactive h1,.oncology-interactive h2,.oncology-interactive h3{font-family:Newsreader,Georgia,serif;font-weight:400;letter-spacing:-.025em;line-height:1.1}
.oncology-interactive .eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:.77rem;font-weight:600;color:var(--accent);margin:0 0 18px}
.oncology-interactive .interactive-breadcrumb{font-size:.9rem;padding-top:25px}
.oncology-interactive .opening{padding-block:48px 40px}
.oncology-interactive .opening>div{display:grid;grid-template-columns:1fr 1fr;align-items:end;gap:90px}
.oncology-interactive .opening h1{font-size:clamp(3rem,4.8vw,4.8rem);margin:0}
.oncology-interactive .opening>div>p{max-width:440px;font-size:1.3rem;margin:0 0 12px}
.oncology-interactive .chapter-nav{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--deep);border-bottom:1px solid var(--deep);margin-bottom:30px}
.oncology-interactive .chapter-nav[hidden]{display:none}
.oncology-interactive .chapter-nav button{background:transparent;color:var(--ink);border:0;border-right:1px solid var(--line);padding:18px 16px;text-align:left;cursor:pointer;font-size:.95rem;min-height:70px;border-radius:0;box-shadow:none}
.oncology-interactive .chapter-nav button:last-child{border-right:0}
.oncology-interactive .chapter-nav button span{display:block;color:var(--accent);font-size:.8rem;margin-bottom:6px}
.oncology-interactive .chapter-nav button[aria-pressed=true]{background:var(--deep);color:var(--paper)}
.oncology-interactive .chapter-nav button[aria-pressed=true] span{color:#e0b48e}
.oncology-interactive .workbench{display:grid;grid-template-columns:1.55fr 1fr;gap:46px;align-items:start}
.oncology-interactive .diagram-shell{background:var(--paper);border:1px solid var(--line)}
.oncology-interactive .diagram-heading{display:flex;justify-content:space-between;padding:18px 22px;margin:0;font-size:.85rem}
.oncology-interactive .diagram-heading span:last-child{color:#526663}
.oncology-interactive svg{width:100%;height:auto;display:block}
.oncology-interactive .diagram-key{display:flex;gap:15px;flex-wrap:wrap;font-size:.82rem;padding:15px 20px;border-top:1px solid var(--line)}
.oncology-interactive .diagram-key span{display:flex;align-items:center;gap:8px}
.oncology-interactive .diagram-key i{display:inline-block;width:14px;height:14px}
.oncology-interactive .key-target{border:2px solid #9b5138;background:#edd8ca}
.oncology-interactive .key-tissue{background:#a4b8ad;border:1px solid #316b62}
.oncology-interactive .key-route{height:0!important;width:22px!important;border-top:2px dashed #a6803d}
.oncology-interactive .diagram-limit{font-size:.88rem;color:#526663;margin:0;padding:0 20px 20px}
.oncology-interactive .explanation-panel h2{font-size:2.7rem;margin:0 0 23px}
.oncology-interactive .explanation-panel section{padding-block:15px 22px}
.oncology-interactive .explanation-panel section[hidden]{display:none}
.oncology-interactive .takeaway{border-left:2px solid var(--accent);padding-left:18px;margin-top:25px}
.oncology-interactive .interaction-note{color:#526663;font-size:.9rem;border-top:1px solid var(--line);padding-top:18px}
.oncology-interactive .normal-tissue,.oncology-interactive .target,.oncology-interactive .beam-routes{transition:opacity .35s ease}
.oncology-interactive .is-muted{opacity:.24}
.oncology-interactive .beam-routes.is-muted{opacity:.13}
.oncology-interactive [data-beam][hidden]{display:none}
.oncology-interactive fieldset{border:1px solid var(--line);padding:12px 18px;margin:25px 0}
.oncology-interactive legend{font-size:.92rem}
.oncology-interactive fieldset label{display:block;padding-block:8px;cursor:pointer}
.oncology-interactive input{accent-color:var(--deep);width:18px;height:18px;vertical-align:middle;margin-right:10px}
.oncology-interactive .static-alternative{border-top:2px solid var(--deep);margin-top:50px;padding:30px 0 38px;max-width:950px}
.oncology-interactive .static-alternative h2{font-size:2.2rem}
.oncology-interactive .static-alternative ol{display:grid;grid-template-columns:1fr 1fr;gap:25px 40px;padding-left:22px}
.oncology-interactive .static-alternative li strong{display:block}
.oncology-interactive .static-alternative>p{color:#526663}
.oncology-interactive .interactive-sources{border-top:1px solid var(--line);padding-block:25px 45px;max-width:950px}
.oncology-interactive .interactive-sources h2{font-size:2rem}
.oncology-interactive .interactive-sources p,.oncology-interactive .interactive-sources li{font-size:1rem}
@media(max-width:900px){.oncology-interactive .opening>div{gap:40px}.oncology-interactive .workbench{gap:28px;grid-template-columns:1.25fr 1fr}.oncology-interactive .explanation-panel h2{font-size:2.2rem}.oncology-interactive .chapter-nav button{font-size:.9rem}}
@media(max-width:650px){.oncology-interactive{padding-inline:18px}.oncology-interactive .opening{padding-block:30px}.oncology-interactive .opening>div,.oncology-interactive .workbench{grid-template-columns:1fr;gap:22px}.oncology-interactive .opening h1{font-size:3rem}.oncology-interactive .opening>div>p{font-size:1.15rem}.oncology-interactive .chapter-nav{grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}.oncology-interactive .chapter-nav button{background:var(--cream);border:0;padding:14px}.oncology-interactive .diagram-heading{padding:14px;font-size:.8rem}.oncology-interactive .diagram-key{gap:10px;padding:12px 14px;font-size:.76rem}.oncology-interactive .explanation-panel h2{font-size:2.5rem}.oncology-interactive .explanation-panel section{padding-top:0}.oncology-interactive .static-alternative{margin-top:25px}.oncology-interactive .static-alternative ol{grid-template-columns:1fr;gap:18px}.oncology-interactive .static-alternative h2{font-size:2rem}.oncology-interactive .diagram-limit{padding:0 14px 14px}.oncology-interactive .diagram-labels{font-size:34px}.oncology-interactive .beam-routes{stroke-width:3}.oncology-interactive .beam-routes text{font-size:30px}.oncology-interactive .interactive-sources li{margin-bottom:10px}}
.oncology-interactive .chapter-nav button { transition:background-color .2s ease,color .2s ease; }
.oncology-interactive .chapter-nav button:hover:not([aria-pressed=true]) { background:#e6e9df; }
.oncology-interactive .chapter-nav button[aria-pressed=true] { box-shadow:inset 0 -3px #d8a17b; }
.oncology-interactive .explanation-panel section:not([hidden]) { animation:explanation-reveal .24s ease-out; }
.oncology-interactive fieldset label { min-height:44px; padding:10px 8px; }
.oncology-interactive fieldset label:has(input:checked) { background:#edf0e6; }
@keyframes explanation-reveal { from { opacity:.4; } to { opacity:1; } }
@media(prefers-reduced-motion:reduce){.oncology-interactive *{transition:none!important;animation:none!important;scroll-behavior:auto!important}}