.arts-bs-calculator { margin: 16px 0; padding: 12px; border: 1px dashed #ddd; background: #fafafa; }
.arts-bs-calculator label { display:block; margin-bottom:6px; font-weight:600; }
.arts-bs-calculator input[type="number"] { width:140px; margin-right:8px; padding:6px; }
.arts-bs-result { margin-top:12px; }
.arts-bs-table { width:100%; border-collapse:collapse; }
.arts-bs-table th, .arts-bs-table td { padding:6px 8px; border:1px solid #eee; text-align:left; }
.arts-bs-note { margin-top:8px; color:#444; font-size:13px; }
.arts-bs-error { color:#b00; font-weight:600; }