body{ background: linear-gradient(135deg, #8EC5FC 0%, #E0C3FC 100%);
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      margin: 0;
      font-family: 'Arial', sans-serif;
    }
    .card {
      max-width: 400px;
      width: 100%;
      border-radius: 15px;
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
      background: #ffffff;
      overflow: hidden;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 30px rgba(0, 0, 0, 0.3);
    }
    .card-body {
      padding: 2rem;
      color: #333;
    }
    .card-body h2 {
      color: #5C73F2;
    }
    .btn-primary {
      width: 100%;
      background: linear-gradient(135deg, #5C73F2 0%, #A3DAFB 100%);
      border: none;
      color: white;
      transition: background 0.3s;
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #A3DAFB 0%, #5C73F2 100%);
    }
    .form-label {
      color: #555;
    }
    .form-control {
      background: #f7f9fc;
      border: 1px solid #ddd;
      border-radius: 10px;
    }
    .form-control:focus {
      box-shadow: none;
      border-color: #5C73F2;
    }
    .register-link {
      margin-top: 15px;
      display: block;
      text-align: center;
      color: #5C73F2;
      text-decoration: none;
      transition: color 0.3s;
    }
    .register-link:hover {
      color: #3F54D3;
    }
    .alert {
      border-radius: 5px;
      padding: 10px;
      margin-bottom: 15px;
    }