body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }
  
  header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
  }
  
  h1 {
    margin: 0;
  }
  
  .container {
    display: flex;
    justify-content: space-between;
    padding: 20px;
  }
  
  .skills, .certificate-upload {
    width: 48%;
  }
  
  ul {
    list-style: none;
    padding: 0;
  }
  
  li {
    margin-bottom: 10px;
  }
  
  form {
    margin-top: 10px;
  }
  
  label, input, button {
    display: block;
    margin-bottom: 10px;
  }
  
  button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #555;
  }