/* Course hubs are directories, with optional exploration kept secondary. */
.subject-landing{max-width:1120px;margin:12px auto 0;--subject-accent:#1560bc}.subject-landing-science{--subject-accent:#087e76}
.subject-landing .reference-content{background:none;border:0;box-shadow:none;padding:0;min-width:0}
.subject-intro{display:flex;justify-content:space-between;align-items:end;gap:24px;padding:10px 0 24px;border-bottom:1px solid var(--line)}
.subject-intro .breadcrumb{font-size:12px;margin:0 0 14px}.subject-intro h1{font-size:36px;line-height:1.15;margin:0 0 9px}.subject-intro p{font-size:15px;color:var(--muted);margin:0}
.subject-shortcuts{display:flex;gap:22px;flex-wrap:wrap}.subject-shortcuts a{font-size:13px;font-weight:700;color:var(--subject-accent);min-height:36px;display:flex;align-items:center;gap:6px}
.subject-start{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:36px;margin-top:26px}
.subject-landing h2{font-size:23px;line-height:1.3;margin:0 0 7px}.subject-caption{font-size:13px;line-height:1.6;margin:0;color:var(--muted)}
.subject-unit-links{display:grid;grid-template-columns:1fr 1fr;column-gap:25px;margin-top:15px}.subject-unit-link{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:9px;align-items:center;border-top:1px solid var(--line);min-height:68px}
.subject-unit-link>a:first-child{display:grid;grid-template-columns:25px minmax(0,1fr);align-items:center;gap:9px;padding:12px 0;min-height:44px;box-sizing:border-box;color:var(--ink)}
.subject-unit-link strong{font-size:15px;line-height:1.4}.subject-unit-mark{font-size:11px;font-weight:700;color:var(--subject-accent)}.unit-link-arrow{font-size:16px;color:var(--subject-accent)}
.subject-unit-link .subject-notes-link{font-size:11px;color:var(--subject-accent);display:flex;gap:4px;min-height:40px;align-items:center}.subject-unit-link>a:hover strong{text-decoration:underline;text-underline-offset:3px}
.subject-textbooks{border-left:1px solid var(--line);padding-left:28px}.subject-textbooks h2{font-size:20px;margin-bottom:18px}.subject-book{display:flex;align-items:center;gap:17px}.subject-book img{width:76px;height:100px;object-fit:contain}.subject-book strong{display:block;font-size:16px}.subject-book small{display:block;font-size:12px;color:var(--muted);line-height:1.6;margin:6px 0 10px}.subject-book b{font-size:12px;color:var(--subject-accent)}
.subject-book-pair{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-bottom:12px}.subject-book-pair a{display:flex;flex-direction:column;align-items:center;gap:9px}.subject-book-pair img{height:98px;width:72px;object-fit:contain}.subject-book-pair strong{font-size:11px;font-weight:600;text-align:center}.subject-textbooks>a:not(.subject-book){font-size:12px;font-weight:700;color:var(--subject-accent)}
.subject-classroom-note{font-size:12px;color:var(--muted);line-height:1.7;margin:24px 0 0;padding-top:15px;border-top:1px solid var(--line)}
.subject-general{display:grid;grid-template-columns:1fr 1.7fr;gap:32px;align-items:center;border-top:1px solid var(--line)!important;margin:28px 0 0;padding-top:24px!important}.subject-general h2{font-size:20px}.subject-resource-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.subject-resource-links a{display:flex;flex-direction:column;gap:10px;align-items:flex-start}.subject-resource-links img{width:100%;max-width:155px;height:38px;object-fit:contain;object-position:left center;mix-blend-mode:multiply}.subject-resource-links a>span{font-size:11px;color:var(--muted);line-height:1.5}
.subject-highlights{border-top:1px solid var(--line)!important;padding-top:23px!important;margin-top:24px}.subject-highlights h2{font-size:20px;margin-bottom:18px}.subject-highlight-layout{display:grid;grid-template-columns:1fr 1fr;gap:36px}.subject-feature{display:grid;grid-template-columns:150px minmax(0,1fr);gap:22px;align-items:center}.subject-feature>img{width:150px;height:95px;object-fit:contain;mix-blend-mode:multiply}.subject-feature h3{font-size:19px;line-height:1.4;margin:0 0 7px}.subject-feature p{font-size:13px;line-height:1.65;color:var(--muted);margin:0 0 9px}.subject-feature a{font-size:13px;font-weight:700;color:var(--subject-accent)}.subject-feature small{display:block;font-size:10px;color:var(--muted);margin-top:8px}.subject-project-links{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;align-content:center}.subject-project-links a{font-size:12px;color:var(--subject-accent);line-height:1.5;padding:3px 0}.subject-project-links a:hover{text-decoration:underline}.subject-landing :is(a,button,summary):focus-visible{outline:2px solid var(--subject-accent);outline-offset:4px}
.dark .subject-resource-links img,.dark .subject-feature>img{mix-blend-mode:normal}.dark .subject-resource-links img,.dark .subject-feature>img{background:#fff;border-radius:3px}
@media(max-width:900px){.subject-start{grid-template-columns:minmax(0,1fr) 245px;gap:24px}.subject-unit-links{grid-template-columns:1fr}.subject-textbooks{padding-left:22px}.subject-general{grid-template-columns:1fr;gap:20px}.subject-highlight-layout{grid-template-columns:1fr;gap:22px}}
@media(max-width:650px){.subject-landing{margin-top:0}.subject-intro{display:block;padding:7px 0 16px}.subject-intro h1{font-size:30px}.subject-intro p{font-size:13px;line-height:1.6}.subject-intro .breadcrumb{margin-bottom:10px}.subject-shortcuts{margin-top:10px;gap:23px}.subject-shortcuts a{font-size:12px}.subject-start{grid-template-columns:1fr;gap:22px;margin-top:20px}.subject-landing h2{font-size:21px}.subject-caption{font-size:12px}.subject-unit-links{margin-top:12px}.subject-unit-link{min-height:58px}.subject-unit-link strong{font-size:15px}.subject-unit-link .subject-notes-link{font-size:12px;min-height:44px}.subject-textbooks{padding:18px 0 0;border-left:0;border-top:1px solid var(--line)}.subject-textbooks h2{font-size:20px;margin-bottom:14px}.subject-book-pair{display:flex;gap:32px;justify-content:flex-start}.subject-book-pair a{flex-direction:row;align-items:center;max-width:46%;gap:10px}.subject-book-pair img{width:49px;height:68px}.subject-book-pair strong{text-align:left;font-size:12px}.subject-classroom-note{margin-top:16px}.subject-general{margin-top:22px;gap:18px;padding-top:18px!important}.subject-resource-links{gap:15px}.subject-resource-links img{height:32px}.subject-resource-links a>span{font-size:10px}.subject-highlights{margin-top:18px;padding-top:18px!important}.subject-feature{grid-template-columns:110px minmax(0,1fr);gap:18px}.subject-feature>img{width:110px;height:85px}.subject-feature h3{font-size:18px}.subject-feature p{font-size:12px}.subject-project-links{gap:12px 20px}.subject-project-links a{font-size:12px;min-height:28px}}

.subject-landing .reference-content{border-radius:0}
/* Course highlights must wrap rather than push mobile content off-screen. */
.subject-highlight-layout{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.subject-highlight-layout>* , .subject-feature>div,.subject-project-links>*{min-width:0}.subject-feature :is(p,h3,a){overflow-wrap:anywhere}.subject-feature a{display:inline-flex;align-items:center;gap:8px;min-height:44px;white-space:normal}.subject-project-links{grid-template-columns:repeat(2,minmax(0,1fr))}.subject-project-links a{display:flex;align-items:center;justify-content:center;min-height:48px;padding:12px 16px;border:1px solid var(--line);border-radius:10px;background:var(--paper,#fff);text-align:center;box-sizing:border-box}.subject-lab-feature{display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:24px;align-items:center;background:linear-gradient(115deg,#092c39,#103b4d)!important;color:#fff;border:1px solid #397c87;border-top:5px solid #40e0cf;border-radius:18px;padding:30px!important;margin:28px auto!important;box-sizing:border-box}.subject-lab-feature>div{min-width:0}.subject-lab-feature .section-kicker{color:#80e9dd}.subject-lab-feature h2{font-size:30px;color:#fff;margin:5px 0 12px}.subject-lab-feature p{font-size:15px;line-height:1.65;margin:0 0 10px;color:#e0eef2}.subject-lab-feature .subject-lab-skills{font-size:13px;color:#aee9df}.subject-lab-emblem{width:72px;height:72px;border-radius:18px;background:#40e0cf20;display:grid;place-items:center;border:1px solid #63b9b6}.subject-lab-emblem .icon{width:42px;height:42px;color:#80e9dd}.subject-lab-feature .primary{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:52px;white-space:normal;text-align:center;background:#40e0cf!important;color:#082f39!important;border:1px solid #40e0cf;text-decoration:none;font-weight:750;padding:14px 20px;border-radius:10px}.subject-lab-feature .primary:hover{background:#80ede0!important}.subject-lab-feature .primary:focus-visible{outline:3px solid #fff;outline-offset:4px}@media(max-width:1000px){.subject-lab-feature{grid-template-columns:64px minmax(0,1fr)}.subject-lab-feature>a{grid-column:1/-1;justify-self:stretch}}@media(max-width:900px){.subject-highlight-layout{grid-template-columns:minmax(0,1fr)}}@media(max-width:650px){.subject-feature{grid-template-columns:minmax(0,1fr);gap:16px;padding:22px;border:1px solid var(--line);border-radius:14px;background:var(--paper,#fff);text-align:center}.subject-feature>img{width:180px;max-width:100%;height:100px;justify-self:center}.subject-feature h3{font-size:23px}.subject-feature p{font-size:15px}.subject-feature a{justify-content:center;font-size:15px}.subject-project-links{grid-template-columns:minmax(0,1fr);gap:12px}.subject-project-links a{font-size:15px}.subject-lab-feature{grid-template-columns:minmax(0,1fr);text-align:center;gap:18px;padding:24px!important}.subject-lab-emblem{justify-self:center}.subject-lab-feature h2{font-size:29px}.subject-lab-feature .primary{width:100%;box-sizing:border-box}.subject-lab-feature p{font-size:15px}}

#science-lab-home{scroll-margin-top:100px}