/* Diagram-only presentation. Approved 3.1.3 page CSS remains byte-for-byte intact. */
body.brbv3-biology .brbd-course{width:100%;min-width:0;background:#fff;border:1px solid #dfd3ea;border-radius:18px;overflow:hidden;line-height:1.55;color:#34204f;box-shadow:0 5px 20px rgba(52,32,79,.035);font-family:inherit}
body.brbv3-biology .brbd-course .brbd-heading{font-size:19px;font-weight:800;line-height:1.4;margin:0;padding:19px 22px;background:linear-gradient(110deg,#f5effb,#fcfaff);border-bottom:1px solid #e7ddef;color:#3f235f}
body.brbv3-biology .brbd-course svg.brbd-vector{display:block!important;width:100%!important;min-width:0!important;height:auto!important;max-height:none!important;margin:0;padding:12px;box-sizing:border-box}
body.brbv3-biology .brbd-course .brbd-panels{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0}
body.brbv3-biology .brbd-course .brbd-panel{background:#fff;border:0;border-bottom:1px solid #e8e0ef;border-radius:0;box-shadow:none;margin:0;padding:18px 12px;min-width:0}
body.brbv3-biology .brbd-course .brbd-panel:nth-child(odd){border-right:1px solid #e8e0ef}
body.brbv3-biology .brbd-course .brbd-panel h4{font-size:17px;font-weight:750;line-height:1.45;color:#4d2f70;margin:0 5px 7px;text-align:center}
body.brbv3-biology .brbd-course .brbd-key{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;margin:0;padding:10px 22px 20px;font-size:15px;line-height:1.45}
body.brbv3-biology .brbd-course .brbd-key>div{display:grid;grid-template-columns:25px minmax(0,1fr);gap:8px;align-items:start}
body.brbv3-biology .brbd-course .brbd-key dt{display:flex;align-items:center;justify-content:center;background:#f0e7f8;border:1px solid #d8c6e8;border-radius:50%;width:24px;height:24px;font-size:13px;font-weight:750;color:#513177;margin:0}
body.brbv3-biology .brbd-course .brbd-key dd{margin:1px 0 0}
body.brbv3-biology .brbd-course .brbd-panel .brbd-key{grid-template-columns:1fr;padding:9px 6px 0;font-size:14px}
body.brbv3-biology .brbd-course p.brbd-note{font-size:14px;line-height:1.6;margin:0;padding:15px 22px;background:#faf7fd;color:#60516f;border-top:1px solid #ebe2f2}
body.brbv3-biology .brbd-course p.brbd-detail{font-size:14px;line-height:1.55;margin:6px 7px 0;color:#625170;text-align:center}
body.brbv3-biology .brbd-course .brbd-flow-list{display:grid;gap:14px;padding:22px}
body.brbv3-biology .brbd-course .brbd-flow-card{display:grid;grid-template-columns:38px minmax(0,1fr);gap:14px;background:linear-gradient(110deg,#fff,#fcfaff);border:1px solid #e1d4ec;border-radius:13px;padding:17px;align-items:start;box-shadow:0 2px 6px rgba(52,32,79,.025)}
body.brbv3-biology .brbd-course .brbd-step{display:flex;align-items:center;justify-content:center;height:36px;width:36px;border-radius:10px;background:#efe5f8;color:#72469b;font-size:14px;font-weight:800}
body.brbv3-biology .brbd-course .brbd-flow-card strong{display:block;color:#40235f;font-size:17px;line-height:1.45;font-weight:750}
body.brbv3-biology .brbd-course .brbd-flow-card p{font-size:15px;line-height:1.6;margin:5px 0 0;color:#675575}
body.brbv3-biology .brbd-course .brbd-precision-window{overflow-x:auto;padding:0 8px;max-width:100%;outline-offset:-3px;overscroll-behavior-x:contain}
body.brbv3-biology .brbd-course .brbd-precision-window svg.brbd-vector{min-width:610px!important;padding:0}
body.brbv3-biology .brbd-course .brbd-zoom{display:none;border-top:1px solid #e5d9ef;margin:0;padding:0}
body.brbv3-biology .brbd-course .brbd-zoom summary{display:list-item;cursor:pointer;min-height:48px;padding:13px 17px;background:#f4ecfb;color:#513177;font-size:15px;font-weight:750;line-height:1.6}
body.brbv3-biology .brbd-course .brbd-zoom summary:focus-visible{outline:3px solid #9b6900;outline-offset:-3px}
body.brbv3-biology .brbd-course p.brbd-pan-hint{display:none;margin:0;padding:9px 16px;background:#faf7fd;font-size:13px;color:#625170}
@media(max-width:650px){
 body.brbv3-biology .brbd-course svg.brbd-wide text{font-size:34px}
 body.brbv3-biology .brbd-course svg.brbd-wide .brbd-number-disc{r:25px}
 body.brbv3-biology .brbd-course .brbd-zoom{display:block}
 body.brbv3-biology .brbd-course .brbd-panels{grid-template-columns:1fr}
 body.brbv3-biology .brbd-course .brbd-panel:nth-child(odd){border-right:0}
 body.brbv3-biology .brbd-course .brbd-heading{font-size:17px;padding:16px}
 body.brbv3-biology .brbd-course .brbd-key{grid-template-columns:1fr;font-size:15px;padding:8px 16px 18px;gap:10px}
 body.brbv3-biology .brbd-course .brbd-panel .brbd-key{font-size:15px;padding:7px 5px 0}
 body.brbv3-biology .brbd-course .brbd-flow-list{gap:11px;padding:14px}
 body.brbv3-biology .brbd-course .brbd-flow-card{grid-template-columns:30px minmax(0,1fr);padding:13px;gap:10px}
 body.brbv3-biology .brbd-course .brbd-step{width:29px;height:29px;border-radius:8px;font-size:12px}
 body.brbv3-biology .brbd-course .brbd-flow-card strong{font-size:16px}
 body.brbv3-biology .brbd-course .brbd-flow-card p{font-size:15px}
 body.brbv3-biology .brbd-course p.brbd-note{padding:13px 16px}
 body.brbv3-biology .brbd-course p.brbd-pan-hint{display:block}
}