.rsc-calculator {
  max-width: 500px;
  margin: auto;
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.rsc-calculator h2 { text-align: center; margin-bottom: 20px; }
.rsc-calculator label { display: block; margin-top: 10px; font-weight: bold; }
.rsc-calculator input { width: 100%; padding: 8px; margin-top: 5px; border: 1px solid #ccc; border-radius: 5px; }
.rsc-calculator button { margin-top: 20px; padding: 10px; width: 100%; background: #007bff; color: #fff; border: none; border-radius: 5px; cursor: pointer; }
.rsc-calculator button:hover { background: #0056b3; }
.rsc-result { margin-top: 20px; padding: 15px; background: #e9f7ef; border-radius: 5px; font-size: 16px; }