body {
      margin: 0;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #f4f5f7;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
      color: #172b4d;
    }
    .card {
      width: 360px;
      padding: 32px;
      background: white;
      border: 1px solid #dfe1e6;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(9, 30, 66, .12);
      text-align: center;
    }
    .logo {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .logo span { color: #1868db; }
    p {
      color: #5e6c84;
      line-height: 1.5;
      margin-bottom: 24px;
    }
    .button {
      display: inline-block;
      box-sizing: border-box;
      width: 100%;
      padding: 12px 16px;
      border-radius: 4px;
      background: #1868db;
      color: white;
      text-decoration: none;
      font-weight: 600;
    }
    .button:hover { background: #0c53b8; }
    .note {
      margin-top: 18px;
      font-size: 12px;
      color: #6b778c;
    }