.container{max-width:960px;margin:0 auto;padding:1.5rem}.card{background:#fff;border:1px solid #e2e6ea;border-radius:8px;padding:1.25rem 1.5rem;margin-bottom:1.5rem}.hint{color:#64707d;font-size:.9rem}.error{color:#b00020;background:#fdecee;padding:.5rem .75rem;border-radius:6px}table{width:100%;border-collapse:collapse;margin-top:.5rem}th,td{text-align:left;padding:.45rem .6rem;border-bottom:1px solid #eef1f4}th{font-size:.85rem;color:#64707d;font-weight:600}fieldset{border:1px solid #e2e6ea;border-radius:6px;margin-bottom:1rem;display:grid;gap:.75rem;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}legend{font-weight:600;padding:0 .4rem}label{display:flex;flex-direction:column;gap:.3rem;font-size:.9rem}input[type=number]{padding:.45rem .6rem;border:1px solid #c7ced6;border-radius:6px}button{padding:.6rem 1.25rem;background:#2563eb;color:#fff;border:none;border-radius:6px;font-size:1rem;cursor:pointer}button:disabled{background:#93b4f0;cursor:wait}.result{margin-top:1.5rem;border-top:1px solid #e2e6ea;padding-top:1rem}:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1f2933;background:#f4f6f8}body{margin:0}h1{margin-top:0}