body {
      font-family: 'Segoe UI', sans-serif;
      background: #f5f7fa;
      margin: 0;
      padding: 0;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
    }

    .container {
      background: #fff;
      padding: 40px;
      border-radius: 16px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.1);
      text-align: center;
      max-width: 400px;
      width: 90%;
    }

    h1 {
      margin-bottom: 24px;
      font-size: 28px;
      color: #333;
    }

    .btn {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      background-color: #eee;
      padding: 12px 20px;
      border-radius: 10px;
      text-decoration: none;
      font-weight: 500;
      color: #222;
      margin: 10px 0;
      transition: all 0.3s ease;
    }

    .btn:hover {
      background-color: #ddd;
      transform: scale(1.02);
    }

    .btn img {
      width: 24px;
      height: 24px;
    }

    footer {
      margin-top: 20px;
      font-size: 12px;
      color: #777;
    }