:root{--green:#198754}.lesson-heading h1{font-size:clamp(25px,3vw,34px)}.lesson-heading .eyebrow{font-size:12px;letter-spacing:.035em}main.wrap{padding-top:16px}.note-content{padding:16px 22px;gap:18px}.visual img{height:210px}.note-content h2{font-size:25px}.feedback{min-height:68px}.animation-controls{clear:both;flex-wrap:wrap}.animation-controls .btn,.enlarge{min-height:44px;font-size:16px}.next-lesson{margin-top:12px}.resources{margin-top:14px}footer{padding:12px 0}.practice-card{padding:18px}.question-image{height:140px}.support-note{margin-top:8px}
.sb-hub{font:17px/1.55 system-ui,-apple-system,Segoe UI,sans-serif;background:#f4f7fa;color:#163247}.sb-hub h1{font-size:clamp(29px,4vw,42px);margin:6px 0 8px}.sb-hub h2{font-size:25px;margin:0 0 12px}.sb-intro{max-width:740px;margin:0 0 18px}.sb-label{font-size:13px;color:#167846;font-weight:750;text-transform:uppercase;letter-spacing:.04em}.sb-actions{display:flex;flex-wrap:wrap;gap:9px;margin:15px 0 24px}.sb-actions a{min-height:44px}.sb-section{margin:22px 0;scroll-margin-top:15px}.sb-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.sb-box{background:white;border:1px solid #d7e1e8;border-radius:13px;padding:20px;min-width:0}.sb-box p{font-size:16px;margin:0 0 12px}.sb-links{list-style:none;margin:0;padding:0}.sb-links li+li{border-top:1px solid #e2e9ee}.sb-links a{display:flex;gap:13px;align-items:center;min-height:60px;padding:10px 0;text-decoration:none;color:#163247}.sb-links a:hover strong{text-decoration:underline}.sb-links .number{background:#eaf5ee;color:#167846;border-radius:7px;padding:7px;font-weight:750;min-width:42px;text-align:center}.sb-links strong{display:block;font-size:17px}.sb-links small{display:block;color:#526679;font-size:13px}.sb-higher{border-top:4px solid #198754}.sb-higher summary{font-size:21px;font-weight:750;cursor:pointer;min-height:44px}.sb-resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.sb-resource-grid a{display:block;padding:15px;border:1px solid #cfdfd7;border-radius:10px;background:white;text-decoration:none;font-weight:700}.sb-resource-grid small{display:block;font-size:14px;color:#526679;font-weight:400;margin-top:5px}.sb-fine{font-size:14px;color:#526679}.sb-photo{display:block;width:100%;height:145px;object-fit:contain;background:#fff;border-radius:8px;margin:10px 0}.sb-hub a:focus-visible{outline:3px solid #1768ac;outline-offset:4px}
@media(max-width:700px){.note-content{padding:13px;gap:8px}.note-content p{font-size:16px;line-height:1.45}.note-content h2{font-size:22px}.visual img{height:clamp(125px,23dvh,175px)}.caption{font-size:13px}.lesson-heading h1{font-size:26px}.tabs{margin-bottom:10px}.sb-grid,.sb-resource-grid{grid-template-columns:1fr}.sb-box{padding:16px}.sb-hub .back{font-size:14px}.sb-actions .btn{flex:1 1 145px}.sb-links a{min-height:64px}body.practising .option,body.practising .feedback{font-size:16px}.sb-hub .top .wrap{gap:12px}.sb-hub .brand{font-size:20px}}
@media(min-width:701px) and (max-height:760px){.top .wrap{min-height:52px}.lesson-heading h1{font-size:28px}.tabs{margin-bottom:10px}.visual img{height:175px}.note-content{padding-top:12px;padding-bottom:12px}.note-top{padding-top:10px}.note-content p{font-size:17px}.next-lesson,.resources{margin-top:9px}.practice-card h2{font-size:22px}.question-image{height:115px}.option{min-height:53px}.practice-card{padding:14px}.feedback{min-height:58px}}
.sb-topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.sb-topic-card{background:white;border:1px solid #d7e1e8;border-left:4px solid #198754;border-radius:10px;padding:15px 18px;min-width:0;scroll-margin-top:16px}.sb-hub .sb-topic-card h2{font-size:21px;margin:0 0 6px}.sb-topic-status{display:block;color:#167846;font-size:14px;line-height:1.45}.sb-topic-card p{font-size:16px;margin:6px 0 3px;line-height:1.4}.sb-topic-links{display:flex;flex-wrap:wrap;gap:0 16px}.sb-topic-links a,.sb-topic-higher{display:inline-flex;align-items:center;min-height:44px;font-size:16px;font-weight:700}.sb-extra-topics{align-items:start}.sb-extra-topics>section,#b1-higher,#b3-higher{scroll-margin-top:16px}.sb-higher h3{font-size:20px;margin:20px 0 5px}.sb-topic-higher{margin-top:10px}@media(max-width:700px){.sb-topic-grid{grid-template-columns:1fr}.sb-topic-card{padding:13px 15px}.sb-hub .sb-topic-card h2{font-size:20px}}