html, body {
      margin: 0;
      padding: 0;
      background: #101014;
      color: #fff;
      font-family: 'Poppins', sans-serif;
      height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .panel {
      background-color: rgba(255, 255, 255, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 100px;
      border-radius: 16px;
      text-align: center;
      width: 100%;
      max-width: 700px;
    }

    .logo {
      width: 64px;
      height: 64px;
      margin-bottom: 24px;
    }

    h1 {
      margin: 0;
      font-size: 24px;
    }

    .spinner {
      margin-top: 24px;
      border: 4px solid rgba(21, 21, 25);
      border-top: 4px solid rgba(135, 0, 255);
      border-radius: 50%;
      width: 40px;
      height: 40px;
      animation: spin 1s linear infinite;
      margin-left: auto;
      margin-right: auto;
    }

    @keyframes spin {
      to { transform: rotate(360deg); }
    }