.bfa-import-review{margin:18px 0;padding:22px;border:1px solid #d8e3ef;border-left:6px solid #7652c7;border-radius:14px;background:#fff;box-shadow:0 8px 24px rgba(35,62,105,.08)}
.bfa-source-compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.bfa-source-compare pre{max-height:280px;overflow:auto;white-space:pre-wrap;padding:14px;border-radius:10px;background:#f4f7fb}
.bfa-source-compare textarea,.bfa-import-review textarea,.bfa-import-review input,.bfa-import-review select{width:100%;box-sizing:border-box}
.bfa-review-grid{display:grid;grid-template-columns:repeat(4,minmax(140px,1fr));gap:12px;margin:16px 0}
.bfa-import-review label{display:grid;gap:5px;font-weight:700}
.bfa-geometry{display:flex;gap:14px;align-items:end;margin:16px 0;padding:15px;border:1px solid #d8e3ef;border-radius:10px}
.bfa-geometry label{flex:1}.bfa-math-preview{margin-top:8px;padding:12px;border:1px dashed #9eb5cc;border-radius:8px;background:#fbfdff;font-size:18px}
.bfa-frac{display:inline-grid;grid-template-rows:auto auto;vertical-align:middle;margin:0 .14em;text-align:center;line-height:1.05}
.bfa-frac>span:first-child{padding:0 .18em .08em;border-bottom:1.6px solid currentColor}.bfa-frac>span:last-child{padding:.08em .18em 0}
.bfa-mixed{display:inline-flex;align-items:center;gap:.12em}.bfa-working-space{margin-top:10px}.bfa-working-line{height:24px;border-bottom:1px solid #9aa5b1}.bfa-exam-paper article{break-inside:avoid}
.bfa-source-preview{display:block;width:100%;height:360px;margin:0 0 14px;border:1px solid #d8e2ee;border-radius:12px;background:#fff}
@media(max-width:900px){.bfa-source-compare{grid-template-columns:1fr}.bfa-review-grid{grid-template-columns:1fr 1fr}.bfa-geometry{display:grid;grid-template-columns:1fr}}