.calculation{font-size:2rem;font-weight:700;padding:1rem 0;text-align:center}.card{background:#fff;border-radius:12px;box-shadow:0 4px 10px rgba(0,0,0,.05);margin:0 auto 2rem;max-width:700px;padding:2rem}.tabs{display:flex;gap:.5rem;margin-bottom:1rem}.tabs button{background:#e5e7eb;border:none;border-radius:8px;cursor:pointer;flex:1;font-size:17px;font-weight:600;padding:1.2rem .75rem}.tabs button.active{background:#2563eb;color:#fff}label{color:#304054!important;display:block;font-size:18px!important;font-weight:600;margin:.75rem 0 .25rem}input{border:1px solid #d1d5db;border-radius:6px;font-size:1rem;padding:.6rem;width:100%}.result{font-size:1.6rem!important;font-weight:700!important;margin:1rem 0;text-align:center}