* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: Arial, sans-serif;
      background-color: #ffffff;
      color: #333;
      line-height: 1.6;
    }
    header {
      background-color: #007BFF;
      color: #fff;
      padding: 20px;
      text-align: center;
    }
    nav {
      background-color: #0056b3;
    }
    nav ul {
      list-style: none;
      display: flex;
      justify-content: center;
    }
    nav ul li {
      margin: 10px 15px;
    }
    nav ul li a {
      color: #fff;
      text-decoration: none;
      font-weight: bold;
    }
    nav ul li a:hover {
      text-decoration: underline;
    }
    main {
      padding: 20px;
      max-width: 800px;
      margin: 0 auto;
    }
    footer {
      background-color: #007BFF;
      color: #fff;
      text-align: center;
      padding: 15px;
      position: fixed;
      bottom: 0;
      width: 100%;
    }
    h1, h2, h3, h4 {
      text-align: center;
    }
    .form {
      max-width: 350px;
      margin: 20px auto;
      padding: 20px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-family: Arial, sans-serif;
      background-color: #f9f9f9;
    }
    .form-group {
      display: flex;
      align-items: center;
      margin-bottom: 15px;
    }
    .form-group label {
      width: 90px;
      text-align: right;
      margin-right: 10px;
      font-weight: bold;
    }
    .form-group input {
      flex: 1;
      padding: 8px;
      border: 1px solid #ccc;
      border-radius: 3px;
      font-size: 1em;
    }
    .form button {
      width: 100%;
      padding: 10px;
      background-color: #007BFF;
      border: none;
      border-radius: 3px;
      color: #fff;
      font-size: 1em;
      cursor: pointer;
    }
    .form button:hover {
      background-color: #0069d9;
    }
    table {
      border-collapse: collapse;
      width: 80%;
      margin: 20px auto;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      overflow: hidden;
    }
    thead {
      background-color: #007BFF;
      color: #fff;
      font-size: 1.1em;
    }
    thead th {
      padding: 12px 15px;
      text-align: left;
    }
    tbody td {
      padding: 12px 15px;
      border-bottom: 1px solid #ddd;
    }
    tbody tr:nth-child(even) {
      background-color: #e0f0ff;
    }
    tbody tr:nth-child(odd) {
      background-color: #f5faff;
    }
    tbody tr:hover {
      background-color: #cce5ff;
    }