.resource-index>.beginner-handbook{grid-column:1/-1;min-width:0;margin:12px 0 28px;border:1px solid #dce3ed;border-radius:24px;background:#fff;overflow:clip;color:#273448}
.handbook-intro{padding:32px 36px 28px;border-bottom:1px solid #e4e9f0}
.handbook-intro .eyebrow{margin:0 0 10px;color:#41649b;font-size:14px}
.handbook-intro h2{font-size:clamp(26px,2.5vw,36px);line-height:1.4;letter-spacing:-.035em;margin:0 0 12px;color:#172e52}
.handbook-intro>p:last-child{margin:0;font-size:16px;line-height:1.8;color:#657184}
.handbook-layout{display:grid;grid-template-columns:minmax(220px,.85fr) minmax(0,2.7fr);gap:32px;padding:32px 36px 36px;align-items:start}
.handbook-contents{position:sticky;top:112px;display:flex;flex-direction:column;gap:8px;min-width:0}
.handbook-contents-label{font-size:14px;font-weight:700;color:#67748a;margin:0 0 8px 12px}
.handbook-contents button{display:flex;align-items:flex-start;gap:12px;width:100%;border:1px solid transparent;border-radius:12px;padding:14px 12px;background:transparent;color:#52627b;font:inherit;font-size:15px;line-height:1.65;text-align:left;cursor:pointer;transition:background .18s,color .18s,border-color .18s}
.handbook-contents button>span:last-child{min-width:0;overflow-wrap:anywhere;word-break:keep-all}
.handbook-chapter-number{flex:none;font-size:13px;line-height:1.9;opacity:.7}
.handbook-contents button:hover{background:#f0f4fa;color:#1c3f74}
.handbook-contents button[aria-current=true]{background:#1d3863;color:#fff;font-weight:650;border-color:#1d3863}
.handbook-contents button:focus-visible{outline:3px solid #7198e7;outline-offset:3px}
.handbook-reading{min-width:0;border-left:1px solid #e4e9f0;padding-left:32px}
.handbook-reading>[hidden]{display:none!important}
.cinema-site.immersive-site .handbook-reading>:is(#benefits,#basics,.beginner-answer){margin:0;padding:0;scroll-margin-top:130px}
.cinema-site.immersive-site .handbook-reading>#basics{border:0;border-radius:0}
.handbook-reading .learning-heading h2,.handbook-reading .learning-basics-intro h2,.handbook-reading .beginner-heading h2{font-size:clamp(23px,2vw,30px);line-height:1.5}
.handbook-reading .learning-cases{gap:16px}
.handbook-reading .learning-case-copy{padding:20px}
.handbook-reading .beginner-heading{gap:24px;padding-top:0}
@media(max-width:1100px){.handbook-layout{grid-template-columns:minmax(0,1fr);gap:24px}.handbook-contents{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.handbook-contents-label{grid-column:1/-1}.handbook-reading{border-left:0;border-top:1px solid #e4e9f0;padding-left:0;padding-top:28px}}
@media(max-width:600px){.handbook-intro{padding:24px 20px}.handbook-layout{padding:20px;gap:20px}.handbook-contents{grid-template-columns:minmax(0,1fr);gap:4px}.handbook-contents button{padding:11px 12px}.handbook-reading{padding-top:24px}.resource-index>.beginner-handbook{border-radius:18px}.handbook-reading .beginner-heading{grid-template-columns:minmax(0,1fr)}}
@media(prefers-reduced-motion:reduce){.handbook-contents button{transition:none}}