#learning-body{--lr-ink:#173f4d;--lr-muted:#5c7079;--lr-panel:#f4f8fa;--lr-line:#d8e4e9;--lr-bg:#fff;color:var(--lr-ink);max-width:1036px;margin:auto;padding:0 8px 26px;line-height:1.65;overflow-wrap:anywhere}body.theme-dark #learning-body{--lr-ink:#e1edf0;--lr-muted:#adbec5;--lr-panel:#203640;--lr-line:#415760;--lr-bg:#152b35}.lr-top{display:flex;align-items:center;gap:12px;padding:14px 0 22px}.lr-top>div:nth-child(2){flex:1;line-height:1.3}.lr-top span,.lr-top b{display:block}.lr-top span{font-size:12px;color:var(--lr-muted);margin-bottom:3px}.lr-top b{font-size:17px}.lr-back{background:var(--lr-panel);color:var(--lr-ink);border:0;border-radius:12px;font-size:30px;width:40px;height:44px}.lr-medium,.lr-tabs{display:flex;gap:4px;background:var(--lr-panel);padding:4px;border:1px solid var(--lr-line);border-radius:12px}.lr-medium button,.lr-tabs button{border:0;border-radius:8px;background:none;padding:8px 12px;color:var(--lr-ink);font:inherit;font-size:13px}.lr-medium button.on,.lr-tabs button.on{background:#1d6176;color:#fff}.lr-cover{display:flex;align-items:center;gap:22px;background:linear-gradient(120deg,#e4f2f5,#eff5ff);border:1px solid #d8e8ed;border-radius:20px;padding:24px}.lr-cover img{width:108px;height:108px;border-radius:15px}.lr-cover h1{font-size:26px;line-height:1.3;margin:5px 0}.lr-cover p{margin:8px 0 0;color:#3f6675}.lr-kicker{font-size:11px;letter-spacing:.12em;color:#456e7d}.theme-dark .lr-cover{background:#234654;border-color:#466571}.theme-dark .lr-cover p,.theme-dark .lr-kicker{color:#bcd9e2}.lr-scope{font-size:14px;color:var(--lr-muted);padding:0 2px;margin:15px 0}.lr-facts{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 24px}.lr-facts span{padding:6px 12px;font-size:12px;background:var(--lr-panel);border:1px solid var(--lr-line);border-radius:9px}.lr-h2{font-size:20px;margin:8px 0}.lr-small{font-size:13px;color:var(--lr-muted);margin:8px 0 20px}.lr-index{display:grid;grid-template-columns:1fr 1fr;gap:12px}.lr-unit{display:flex;align-items:center;gap:12px;padding:16px;text-align:left;color:var(--lr-ink);border:1px solid var(--lr-line);border-radius:14px;background:var(--lr-bg);font:inherit;cursor:pointer}.lr-unit:hover{border-color:#5594a4}.lr-number{display:grid;place-items:center;flex-shrink:0;width:35px;height:38px;border-radius:10px;background:var(--lr-panel);font-size:14px}.lr-unit>span:nth-child(2){flex:1}.lr-unit b{font-size:15px;line-height:1.35;display:block}.lr-unit small{display:block;font-size:12px;color:var(--lr-muted);margin-top:5px}.lr-chevron{font-size:23px;color:var(--lr-muted)}.lr-attribution{font-size:11px;color:var(--lr-muted);border-top:1px solid var(--lr-line);margin:24px 0 0;padding-top:16px}.lr-breadcrumb{font-size:12px;color:var(--lr-muted)}.lr-title{font-size:28px;line-height:1.3;margin:6px 0 18px}.lr-tabs{max-width:540px;margin:0 0 20px}.lr-tabs button{flex:1;white-space:nowrap}.lr-panel{background:var(--lr-panel);border:1px solid 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0}.lr-pagination{display:flex;justify-content:space-between;gap:8px;border-top:1px solid var(--lr-line);padding-top:20px;margin-top:24px}.lr-pagination button{border:1px solid var(--lr-line);border-radius:10px;padding:10px 15px;background:var(--lr-bg);color:var(--lr-ink);font:inherit;font-size:13px}.lr-pagination button:disabled{opacity:.35}.lr-diagram{max-width:440px;margin:22px auto}.lr-diagram svg{display:block;width:100%;height:auto}.lr-diagram figcaption{text-align:center;font-size:12px;color:var(--lr-muted);margin-top:6px}#learning-body button:focus-visible,#learning-body summary:focus-visible{outline:3px solid #55a6cc;outline-offset:3px}@media(max-width:600px){#learning-body{padding:0 2px 22px}.lr-top{gap:8px;padding:8px 0 18px}.lr-top b{font-size:15px}.lr-top span{font-size:10px}.lr-back{width:32px;height:40px}.lr-medium{gap:0;padding:3px}.lr-medium button{font-size:11px;padding:7px 8px}.lr-cover{padding:17px;gap:13px;border-radius:16px}.lr-cover img{width:66px;height:80px}.lr-cover h1{font-size:20px}.lr-kicker{font-size:9px}.lr-index{grid-template-columns:1fr;gap:10px}.lr-unit{padding:14px}.lr-title{font-size:24px}.lr-panel,.lr-example{padding:16px}.lr-panel p,.lr-panel li,.lr-steps li{font-size:14px}.lr-example h3{font-size:16px}.lr-tabs button{font-size:12px;padding:8px}.lr-pagination button{padding:9px 12px;font-size:12px}}
.lr-catalog-scope{font-size:13px;color:#5c7079;margin:15px 0}.lr-catalog-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.lr-catalog-card{display:flex;align-items:flex-start;gap:18px;background:transparent;color:inherit;text-align:left;border:1px solid #d8e4e9;border-radius:16px;padding:20px;font:inherit;cursor:pointer}.lr-catalog-card img{width:90px;height:112px;object-fit:cover;border-radius:12px}.lr-catalog-card div{flex:1;min-width:0}.lr-catalog-card div>span{font-size:10px;letter-spacing:.07em;color:#5c7079}.lr-catalog-card h2{font-size:21px;margin:5px 0}.lr-catalog-card p{font-size:13px;line-height:1.6;margin:4px 0 10px;color:#5c7079}.lr-catalog-card small{display:block;font-size:12px}.lr-catalog-card b{display:block;margin-top:14px;font-size:13px;color:#1d6176}.lr-catalog-note{font-size:13px;line-height:1.7;color:#5c7079;margin:20px 0 95px;max-width:850px}.theme-dark .lr-catalog-card{border-color:#415760}.theme-dark .lr-catalog-card p,.theme-dark .lr-catalog-card div>span,.theme-dark .lr-catalog-note,.theme-dark .lr-catalog-scope{color:#adbec5}.theme-dark .lr-catalog-card b{color:#93cadd}@media(max-width:600px){.lr-catalog-grid{grid-template-columns:1fr;gap:12px}.lr-catalog-card{padding:16px;gap:14px}.lr-catalog-card img{width:65px;height:84px}.lr-catalog-card h2{font-size:19px}}

.lr-memory{border:1px solid var(--lr-line);background:var(--lr-panel);border-radius:12px;padding:16px;margin:18px 0}.lr-memory summary{cursor:pointer;font-weight:600;font-size:14px}

.lr-book-map{padding-left:22px;line-height:1.7}.lr-book-map li{margin:7px 0;font-size:13px}.lr-book-map span{font-size:12px;color:var(--lr-muted)}
/* Keep the existing desktop learning shell legible in the selected dark theme. */
@media(min-width:1024px){body.theme-dark:has(#view-learning.active){background:var(--bg)}body.theme-dark:has(#view-learning.active) #topbar{background:var(--card);border-color:var(--line)}body.theme-dark:has(#view-learning.active) #desknav .dn{color:var(--ink2)}body.theme-dark:has(#view-learning.active) #desknav .dn.active{background:#234654;color:#e1edf0}body.theme-dark:has(#view-learning.active) #desknav .dn:hover{background:#203640}}

/* New NCERT chapter diagrams: brighter strokes in dark mode only. */
body.theme-dark #learning-body{--lr-diagram-ink:#83d0df;--lr-diagram-accent:#f0bd7e}