body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: linear-gradient(180deg, #001f4d, #003399);
      color: #fff;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
    }

    .container {
      background: rgba(0, 0, 50, 0.6);
      border-radius: 15px;
      padding: 30px 20px;
      width: 350px;
      text-align: center;
      box-shadow: 0 0 15px rgba(0,0,0,0.4);
    }

    .icon {
      font-size: 40px;
      margin-bottom: 10px;
    }

    h1 {
      font-size: 22px;
      margin: 0;
    }

    p.subtitle {
      font-size: 14px;
      color: #ccc;
      margin-bottom: 15px;
    }

    p.desc {
      font-size: 14px;
      margin-bottom: 25px;
    }

    .features {
      display: flex;
      justify-content: space-around;
      margin-bottom: 20px;
    }

    .feature {
      background: rgba(0, 50, 100, 0.5);
      padding: 10px;
      border-radius: 10px;
      width: 90px;
      margin-top: 15px;
    }

    .feature strong {
      display: block;
      margin-top: 5px;
    }

    .feature span {
      font-size: 12px;
      color: #ccc;
    }

    .btn {
      display: inline-block;
      background: #0066ff;
      color: #fff;
      padding: 12px 20px;
      border-radius: 10px;
      font-weight: bold;
      text-decoration: none;
      transition: 0.3s;
    }

    .btn:hover {
      background: #3385ff;
    }

    .cert {
      margin-top: 15px;
      font-size: 13px;
      color: #a3ffcc;
    }

    .footer {
      margin-top: 15px;
      font-size: 11px;
      color: #aaa;
    }

    .footer a {
      color: #80bfff;
      text-decoration: none;
    }

    .footer a:hover {
      text-decoration: underline;
    }