.calculator-container {
      background-color: #fff;
      padding: 1.5rem;
      border: 1px solid #2c3e50;
      max-width: 400px;
      width: 100%;
margin: 0 auto;
margin-top: 20px;
margin-bottom: 20px;
    }
    h1 {
      text-align: center;
      margin-bottom: 1rem;
         color: #2c3e50;
font-size: 1.5rem;
    }
    .form-group {
      margin-bottom: 1rem;
    }
    label {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: bold;
    }
    input {
      width: 100%;
      padding: 0.5rem;
      font-size: 1rem;
      border: 1px solid #ccc;
      border-radius: 4px;
    }
    button {
      width: 100%;
      padding: 0.7rem;
      font-size: 1rem;
      background-color: #2c3e50;
      color: #fff;
      border: none;
      border-radius: 4px;
      cursor: pointer;
    }
    button:hover {
      background-color: #2a36a5;
    }
    .result {
      margin-top: 1rem;
      padding: 1rem;
      background-color: #e7f4e4;
      border: 1px solid #b2d8b2;
      border-radius: 4px;
      text-align: center;
      font-size: 1.2rem;
      color: #2a5d2a;
    }