* {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'Segoe UI', sans-serif;
      background: #f0f0f0;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    /* Header */
    header {
      background-color: #ffffff;
      padding: 15px 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }

    .logo {
      font-weight: bold;
      font-size: 1.2em;
      color: #333;
    }

    .menu {
      display: flex;
      gap: 20px;
    }

    .menu a {
      text-decoration: none;
      color: #007BFF;
      font-weight: bold;
      transition: color 0.3s ease;
    }

    .menu a:hover {
      color: #0056b3;
    }

    /* Main Section */
    main {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 40px 20px;
      background: #fff;
    }

    .about-container {
      max-width: 800px;
      margin: 0 auto;
      text-align: left;
      padding: 20px;
      background: #fff;
      border-radius: 10px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }

    .about-container h1 {
      font-size: 2.5em;
      margin-bottom: 20px;
      color: #333;
    }

    .about-container h2 {
      font-size: 1.8em;
      margin-top: 30px;
      color: #333;
    }

    .about-container p {
      line-height: 1.6;
      font-size: 1.1em;
      color: #555;
    }

    footer {
      background-color: #ffffff;
      padding: 15px;
      text-align: center;
      color: #777;
      border-top: 1px solid #ddd;
      font-size: 0.9em;
    }