body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }
  
  header {
    background-color: #333;
    color: #fff;
    padding: 20px;
  }
  
  .container {
    display: flex;
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
  }
  
  aside {
    width: 20%;
    padding-right: 20px;
    background-color: #f5f5f5;
    margin-right: 20px;
  }
  
  aside h2 {
    margin-top: 0;
  }
  
  aside ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
  }
  
  aside li {
    margin-bottom: 10px;
  }
  
  main {
    flex-grow: 1;
  }
  
  h1 {
    margin-top: 0;
  }
  
  
  .converter-wrapper {
    border: 1px solid #ccc;
    padding: 20px;
    background-color: #f9f9f9;
  }
  
  .converter-wrapper h2 {
    margin-top: 0;
  }
  
  .converter-wrapper table {
    width: 100%;
  }
  
  .converter-wrapper td {
    padding: 5px;
  }
  
  .converter-wrapper button {
    padding: 10px 20px;
    background-color: #333;
    color: #fff;
  }
  
  .result-box {
    margin-top: 20px;
    background-color: #f5f5f5;
    padding: 20px;
  }
  
  #result-value {
    margin-top: 0;
  }