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.engagement-section{max-width:1180px;margin:auto;padding:30px 24px 88px;display:grid;grid-template-columns:1.25fr .75fr;gap:20px}.since-card,.discovery-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:0 8px 30px rgba(28,39,64,.05)}.engagement-section h2{font-size:clamp(1.8rem,3vw,2.8rem)}.section-copy{color:var(--muted);max-width:620px}.since-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:24px}.since-grid article{border:1px solid var(--line);background:#fafbff;border-radius:15px;padding:16px;display:grid;grid-template-columns:36px 1fr;align-items:center}.since-grid article>span{font-size:1.35rem;grid-row:1/4}.since-grid strong{font-size:1.35rem;letter-spacing:-.04em;font-variant-numeric:tabular-nums}.since-grid b{font-size:.8rem}.since-grid small{font-size:.62rem;color:var(--muted)}.discovery-list{display:grid;gap:9px;margin-top:25px}.discovery-list a{display:grid;grid-template-columns:36px 1fr auto;gap:10px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:12px;text-decoration:none}.discovery-list a:hover{border-color:var(--blue);color:var(--blue)}.discovery-list a>span:first-child{font-size:1.25rem}.discovery-list a span:nth-child(2){display:flex;flex-direction:column}.discovery-list small{color:var(--muted);font-size:.68rem;font-variant-numeric:tabular-nums}.discovery-list b{color:var(--blue)}
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.method{padding-top:100px}.method-intro{max-width:700px}.method-intro>p:last-child{color:var(--muted);font-size:1.1rem}.formula{margin:38px 0;display:flex;align-items:center;justify-content:center;gap:16px;background:linear-gradient(100deg,#edf1ff,#fff8e7);border:1px solid var(--line);padding:25px;border-radius:var(--radius);font-family:ui-monospace,monospace}.formula span{background:#fff;padding:8px 11px;border:1px solid var(--line);border-radius:8px}.formula b{color:var(--blue)}.assumption-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}.assumption-head,.assumption-head>div{display:flex;align-items:center;justify-content:space-between}.assumption-head>div{gap:14px;justify-content:flex-start}.assumption-head .topic-icon{margin:0;width:54px;height:54px;display:grid;place-items:center;border-radius:14px;background:var(--soft)}.assumption-head small{color:var(--muted)}.assumption-head h3{margin:0}.estimate-badge{font-size:.65rem;text-transform:uppercase;letter-spacing:.14em;color:var(--blue);border:1px solid #b8c4ea;padding:6px 10px;border-radius:20px;background:#f4f6ff}dl{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);margin:24px 0 0;border-radius:14px;overflow:hidden}dl div{background:#fbfcfe;padding:17px}dt{color:var(--muted);font-size:.72rem;margin-bottom:5px}dd{margin:0;font-weight:750}.method-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:45px}.method-notes article>span{color:var(--blue);font-family:ui-monospace,monospace;font-size:.75rem}.method-notes h3{margin:8px 0}.method-notes p{color:var(--muted);font-size:.9rem;margin:0}.disclaimer{margin-top:42px;border-left:3px solid var(--blue);background:#eef2ff;padding:16px 18px;color:var(--muted);font-size:.85rem}.disclaimer strong{color:var(--ink)}.detail-link{display:inline-flex;align-items:center;gap:8px;margin-top:20px;color:var(--blue);font-weight:750;text-decoration:none}.detail-link:hover{text-decoration:underline}
.topics-dialog{width:min(1060px,calc(100% - 28px));height:min(820px,calc(100% - 28px));padding:0;border:1px solid var(--line);border-radius:28px;background:var(--bg);color:var(--ink);box-shadow:0 30px 100px rgba(15,23,42,.25)}.topics-dialog::backdrop{background:rgba(17,24,39,.46);backdrop-filter:blur(5px)}.dialog-shell{padding:32px;height:100%;overflow:auto}.dialog-head{display:flex;align-items:start;justify-content:space-between;gap:20px}.close-dialog{border:1px solid var(--line);background:#fff;color:var(--ink);width:44px;height:44px;border-radius:50%;font-size:1.7rem;line-height:1;cursor:pointer}.close-dialog:hover{border-color:var(--blue);color:var(--blue)}.search-label{display:block;font-weight:750;margin:30px 0 8px}.topic-search{width:100%;border:1px solid #bcc5d2;background:#fff;color:var(--ink);border-radius:15px;padding:15px 17px;font-size:1rem}.category-filters{display:flex;gap:8px;overflow:auto;padding:18px 0 6px}.filter-chip{white-space:nowrap;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 13px;color:var(--muted);cursor:pointer;font-weight:700;font-size:.82rem}.filter-chip.active{background:var(--blue);color:#fff;border-color:var(--blue)}.result-count{color:var(--muted);font-size:.8rem}.all-topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding-bottom:20px}.compact-card{min-height:125px;padding:15px}.compact-card strong{margin-top:15px}.empty-state{grid-column:1/-1;color:var(--muted);text-align:center;padding:60px}
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@media(max-width:390px){.ranking-row a{grid-template-columns:31px 29px minmax(0,1fr) auto 20px}.rank-name{font-size:.8rem}.rank-value{font-size:.9rem}.topic-grid{grid-template-columns:1fr}.all-topic-grid{grid-template-columns:1fr 1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.pulse{animation:none}.topic-card,.primary,.ranking-row{transition:none}}