.bhc-card{max-width:720px;margin:12px auto;padding:14px;border-radius:10px;border:1px solid rgba(0,0,0,.06);font-family:Lato,Arial,Helvetica,sans-serif}.bhc-row{display:flex;gap:10px;flex-wrap:wrap}.bhc-field{flex:1;min-width:140px}.bhc-field label{display:block;font-size:18px;color:#555;margin-bottom:6px}.bhc-field input,.bhc-field select{width:100%;padding:8px;border-radius:8px;border:1px solid #e6e6e6;font-size:18px}.bhc-actions{margin-top:12px;display:flex;gap:8px}.bhc-btn{padding:9px 12px;border-radius:8px;border:none;background:#6b21a8;color:#fff;font-weight:600;cursor:pointer}.bhc-btn.secondary{background:#eef2ff;color:#111;border:1px solid #e5e7eb}.bhc-result{margin-top:12px;padding:12px;border-radius:10px;border:1px solid rgba(0,0,0,.04);display:flex;gap:12px;align-items:center}.bhc-bmi{font-size:30px;font-weight:700}.bhc-category{font-size:18px;color:#555}.bhc-bar{flex:1;height:12px;background:#eee;border-radius:999px;overflow:hidden}.bhc-bar-fill{height:100%;width:0%;border-radius:999px;transition:width 600ms ease,background-color 300ms ease}.bhc-msg{font-size:13px;color:#444;margin-top:12px}.bhc-success{padding:10px;background:#ecfdf5;color:#065f46;border-radius:8px;margin-top:10px}.bhc-error{padding:10px;background:#fff1f2;color:#7f1d1d;border-radius:8px;margin-top:10px}