.bd-placeholder-img {
    font-size: 1.125rem;
    text-anchor: middle;
  }

  @media (min-width: 768px) {
    .bd-placeholder-img-lg {
      font-size: 3.5rem;
    }
  }

  .jumbotron {
    margin-top: 75px;
    margin-bottom: 75px;
  }

  .spacer {
    margin-left: 20px;
    margin-right: 20px;
  }

  .card {
    background-color: #fff;
    width: 300px;
    margin: auto;
    text-align: center;
    font-family: arial;
    box-shadow: 10px 10px #A5A5A5;
  }
  
  #profile-pic {
    width: 299px;
    height: 300px;
  }

  #profile-pic2 {
    width: 299px;
    height: 300px;
  }
  
  .bio {
    text-align: left;
    margin-top: 10px;
  }
  
  .links {
    padding: 14px 0 16px 0;
    background-color: #C7D6D5;
    text-align: center;
    width: 300px;
  }
  
  .links a {
    padding: 14px 0 16px 0;
    text-decoration: none;
    font-size: 15px;
    color: #101935; 
    
  }
  
  a:hover {
    
    color: black;
    font-weight: bold; 
  }

  .pad {
    padding: 15px;
  }

  .carousel {
    width:700px;
    height: 800px;
    align-items: center;
    margin: 50px 0px 150px 500px;;
  
  }

  .cert {
    margin: 50px;
    box-shadow: 10px 10px #A5A5A5;
  }

  body {
      font-family: Arial, sans-serif;
      max-width: 800px;
      margin: 0 auto;
      padding: 20px;
      background-color: #f5f5f5;
    }
    .container {
      background: white;
      padding: 20px;
      border-radius: 8px;
      margin-bottom: 20px;
      box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    h1, h2 {
      color: #333;
    }
    .class-info {
      background: #e8f4fd;
      border-left: 4px solid #2196F3;
    }
    .form-group {
      margin-bottom: 15px;
    }
    label {
      display: block;
      margin-bottom: 5px;
      font-weight: bold;
    }
    input {
      width: 100%;
      padding: 8px;
      border: 1px solid #ddd;
      border-radius: 4px;
      font-size: 16px;
    }
    button {
      background: #2196F3;
      color: white;
      padding: 10px 20px;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 16px;
      margin-right: 10px;
    }
    button:hover {
      background: #1976D2;
    }
    .delete-btn {
      background: #f44336;
    }
    .delete-btn:hover {
      background: #d32f2f;
    }
    .edit-btn {
      background: #ff9800;
    }
    .edit-btn:hover {
      background: #f57c00;
    }
    .message {
      padding: 10px;
      margin: 10px 0;
      border-radius: 4px;
    }
    .success {
      background: #d4edda;
      color: #155724;
      border: 1px solid #c3e6cb;
    }
    .error {
      background: #f8d7da;
      color: #721c24;
      border: 1px solid #f5c6cb;
    }
    .record {
      background: #f8f9fa;
      padding: 10px;
      margin: 5px 0;
      border-radius: 4px;
      border: 1px solid #dee2e6;
    }
    #attendanceList {
      max-height: 400px;
      overflow-y: auto;
    }