body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }
  
  header {
    background-color: #333;
    padding: 20px;
    text-align: center;
  }
  
  header img {
    max-width: 200px;
  }
  
  main {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
  }
  
  .dark-theme {
    background-color: #111;
    color: #fff;
    padding: 20px;
    border-radius: 5px;
  }
  
  form {
    margin-top: 20px;
  }
  
  label, input, textarea {
    display: block;
    margin-bottom: 10px;
  }
  
  input, textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
  }
  
  button {
    background-color: #08007e;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #1808ee;
  }
  
  button.notification {
    position: relative;
  }
  
  button.notification:after {
    content: "Candidature envoyée";
    position: absolute;
    top: -30px;
    right: -20px;
    background-color: #4caf50;
    color: #fff;
    padding: 5px;
    border-radius: 5px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
  }
  
  .dark-theme button.notification:after {
    background-color: #45a049;
  }
  
  button.notification.show {
    opacity: 1;
    visibility: visible;
  }