body .cs-calc { border: 1px solid #ddd; padding: 16px; border-radius: 8px; background: #f9f9f9; }
.cs-calc label { display: block; margin-bottom: 8px; }
.cs-btn { padding: 8px 16px; background: #0073aa; color: white; border: none; border-radius: 4px; }
.cs-btn:hover { background: #005f8d; }
.cs-loading { display: none; }
.cs-output { margin-top: 16px; font-weight: bold; }