.content {
      flex: 1;
      padding: 20px;
    }

    .container {
      max-width: 700px;
      margin: auto;
      background: white;
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 0 10px #ccc;
    }

    .about-section {
      margin-top: 40px;
      background: #f1f5f9;
      padding: 25px;
      border-radius: 8px;
      font-size: 15px;
      line-height: 1.6;
    }

    .about-section h3 {
      font-size: 20px;
      margin-bottom: 10px;
    }

    .about-section ul {
      padding-left: 20px;
    }

   

    @media (max-width: 768px) {
      .dropdown-group {
        flex-direction: column;
      }
    }
   h2 {
      color: #002e5b;
    }

    .tab-buttons {
      display: flex;
      margin-bottom: 15px;
    }

    .tab-buttons button {
      padding: 10px 16px;
      border: 1px solid #ccc;
      background: #e4eaf1;
      margin-right: 5px;
      cursor: pointer;
    }

    .tab-buttons button.active {
      /*background-color: #002e5b;*/
      background: linear-gradient(135deg, #d0e7ffcc, #90caf9cc);
      color: #002e5b;
      border-color: #002e5b;
    }

    .converter-box {
      background: #fff;
      border: 1px solid #ccc;
      padding: 20px;
      max-width: 700px;
      display: flex;
      justify-content: space-between;
    }

    .converter-section {
      width: 45%;
    }

    .converter-section label {
      font-weight: bold;
      display: block;
      margin-bottom: 5px;
    }

    .converter-section select {
      width: 100%;
      height: 150px;
      margin-bottom: 10px;
    }

    .converter-section input {
      width: 100%;
      padding: 8px;
      margin-top: 10px;
    }

    .result-box {
      margin-top: 20px;
      font-weight: bold;
    }