.atlas-intro-note{max-width:760px;color:var(--muted);font-size:18px;margin-top:24px}.atlas-tools{padding:25px 0 22px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:35px}.atlas-categories{display:flex;gap:10px;flex-wrap:wrap}.atlas-search-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:23px}.atlas-search-row label{display:flex;flex-direction:column;gap:8px;color:var(--muted);font-size:14px}.atlas-search-row input,.atlas-search-row select{box-sizing:border-box;width:100%;max-width:100%;min-width:0;margin:0;background:var(--bg-alt);color:var(--ink);border:1px solid var(--line);padding:12px 15px;font:17px 'Times New Roman',Times,serif;border-radius:0}.atlas-search-row select option{background:var(--bg);color:var(--ink)}.atlas-tool-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:18px;font-size:14px}.atlas-tool-foot p{color:var(--muted);margin:0}.atlas-topic{padding:50px 0 58px;border-bottom:1px solid var(--line);scroll-margin-top:115px}.atlas-topic[hidden]{display:none}.atlas-topic-heading{margin-bottom:26px;max-width:1000px}.atlas-topic-heading .eyebrow{margin:0 0 10px;font-size:11px}.atlas-topic-heading h2{font-size:clamp(30px,3vw,43px);line-height:1.12;letter-spacing:-.025em}.atlas-topic-grid{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,1fr);gap:44px;align-items:start}.atlas-figure{margin:0;position:sticky;top:115px}.atlas-image{position:relative;display:block;line-height:0;background:white;border:1px solid var(--line);overflow:hidden}.atlas-image img{display:block;width:100%;height:auto;max-width:100%}.slide-page-mask{display:block;position:absolute;background:#fff;pointer-events:none}.atlas-figure figcaption{font-size:12px;line-height:1.6;color:var(--muted);margin-top:12px}.atlas-figure figcaption span{color:var(--accent)}.atlas-summary{font-size:21px;line-height:1.5;color:var(--ink);margin-bottom:23px}.atlas-topic-copy h3{font-size:23px;line-height:1.25;margin:24px 0 10px;color:var(--ink);font-weight:400}.atlas-topic-copy p,.atlas-topic-copy li{font-size:17px;line-height:1.7;color:var(--muted);margin:0 0 14px}.atlas-topic-copy .atlas-summary{font-size:21px;color:var(--ink);line-height:1.5;margin:0 0 23px}.atlas-caution{border-left:2px solid var(--gold);padding:1px 0 1px 18px;margin:25px 0}.atlas-caution h3{font-size:17px;color:var(--gold);margin:0 0 7px}.atlas-caution p{font-size:15px;margin:0}.atlas-deep{margin-top:24px;border-top:1px solid var(--line)}.atlas-deep summary{display:flex;align-items:center;justify-content:space-between;cursor:pointer;list-style:none;padding:17px 0;color:var(--accent);font-size:17px}.atlas-deep summary::-webkit-details-marker{display:none}.atlas-deep[open] summary span{transform:rotate(45deg)}.atlas-deep-content{padding:2px 0 5px}.atlas-deep-content ul{padding-left:22px;margin:10px 0 22px}.atlas-topic-copy .atlas-sources{font-size:12px;line-height:1.6;border-top:1px solid var(--line);padding-top:17px}.atlas-paper-links{display:flex;flex-direction:column;gap:12px;align-items:flex-start;margin-top:20px;font-size:15px}.atlas-empty{padding:45px 0;color:var(--muted)}.atlas-bottom-note{margin:45px 0 70px}.lightbox-visual{position:relative;margin:auto;line-height:0;max-width:100%}.lightbox .lightbox-visual img{width:100%;height:auto;max-height:none;display:block;object-fit:contain}.lightbox-visual .slide-page-mask[hidden]{display:none}@media(max-width:950px){.atlas-topic-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px}.atlas-summary{font-size:19px}.atlas-topic-copy p,.atlas-topic-copy li{font-size:16px}}@media(max-width:700px){.atlas-topic-grid{grid-template-columns:1fr;gap:26px}.atlas-figure{position:static}.atlas-search-row{grid-template-columns:1fr;gap:16px}.atlas-topic{padding:33px 0 40px}.atlas-tools{margin-bottom:8px}.atlas-tool-foot{align-items:flex-start;font-size:13px}.atlas-topic-copy .atlas-summary{font-size:20px}.atlas-topic-heading h2{font-size:32px}.atlas-categories{gap:7px}.atlas-categories .filter{font-size:13px;padding:7px 10px}}@media print{.atlas-tools,.atlas-deep summary{display:none}.atlas-topic-grid{display:block}.atlas-figure{position:static;max-width:650px}.atlas-deep:not([open])>*:not(summary){display:block}.atlas-topic{break-before:page}.atlas-topic-heading h2{font-size:24pt}}

/* Readability: each topic reads as one card, with a clear title → key idea → explanation hierarchy.
   Uses the existing palette tokens only. */
.atlas .atlas-topic{overflow:clip;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:38px 44px 42px;margin-bottom:28px;box-shadow:0 8px 28px #1b426207}
.atlas .atlas-topic-heading{max-width:none;margin-bottom:30px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.atlas .atlas-topic-heading .eyebrow{display:flex;align-items:center;gap:12px;color:var(--teal)}
.atlas .atlas-topic-heading .eyebrow:after{content:attr(data-topic-index);margin-left:auto;color:var(--muted);font-weight:400;letter-spacing:.08em}
.atlas .atlas-topic-heading h2{color:var(--paper);max-width:28ch}
.atlas .atlas-topic-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.06fr);gap:48px}
.atlas .atlas-figure{top:108px}
.atlas .atlas-image{border-radius:12px;box-shadow:0 10px 30px #1b42620f}
.atlas .atlas-topic-copy{max-width:66ch}
.atlas .atlas-topic-copy .atlas-summary{font-size:20px;line-height:1.55;color:var(--ink);background:var(--bg-alt);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;padding:18px 22px;margin:0 0 8px}
.atlas .atlas-topic-copy h3{font-size:21px;line-height:1.3;color:var(--accent);font-weight:600;margin:30px 0 10px}
.atlas .atlas-topic-copy p,.atlas .atlas-topic-copy li{color:var(--ink);font-size:17px;line-height:1.75}
.atlas .atlas-topic-copy li{margin-bottom:8px}
.atlas .atlas-topic-copy li::marker{color:var(--accent)}
.atlas .atlas-topic-copy .atlas-caution{background:var(--bg-alt);border-left:3px solid var(--gold);border-radius:0 12px 12px 0;padding:14px 20px;margin:28px 0}
.atlas .atlas-topic-copy .atlas-caution h3{font-size:16px;color:var(--gold);letter-spacing:.02em;margin:0 0 6px}
.atlas .atlas-topic-copy .atlas-caution p{font-size:15.5px;line-height:1.65;color:var(--muted);margin:0}
.atlas .atlas-deep{border-top:0;margin-top:26px}
.atlas .atlas-deep summary{padding:13px 18px;border:1px solid var(--line);border-radius:10px;background:var(--bg-alt);font-weight:600}
.atlas .atlas-deep summary:hover{border-color:var(--accent)}
.atlas .atlas-deep[open] summary{margin-bottom:4px}
.atlas .atlas-deep-content .atlas-explanation-section+.atlas-explanation-section,.atlas .atlas-deep-content>section:not(.atlas-explanation-section){border-top:1px dashed var(--line);margin-top:26px}
.atlas .atlas-topic-copy .atlas-sources{color:var(--muted);font-size:13px}
.atlas .atlas-paper-links{flex-direction:row;flex-wrap:wrap;gap:10px}
.atlas .atlas-paper-links .text-link{border:1px solid var(--line);border-radius:30px;padding:4px 14px;background:var(--surface);font-size:15px}
@media(max-width:950px){.atlas .atlas-topic{padding:30px 28px 34px}.atlas .atlas-topic-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:30px}.atlas .atlas-topic-copy .atlas-summary{font-size:18.5px}.atlas .atlas-topic-copy p,.atlas .atlas-topic-copy li{font-size:16.5px}}
@media(max-width:700px){.atlas .atlas-topic{padding:22px 18px 26px;border-radius:14px}.atlas .atlas-topic-grid{grid-template-columns:1fr;gap:24px}.atlas .atlas-topic-heading{margin-bottom:22px;padding-bottom:16px}.atlas .atlas-topic-copy .atlas-summary{font-size:18px;padding:14px 16px}.atlas .atlas-topic-copy h3{font-size:19px}}
@media print{.atlas .atlas-topic{border:0;box-shadow:none;padding:0}.atlas .atlas-deep summary{display:none}}