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

        .login-card {
            background: #fff;
            padding: 2rem 2.5rem;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 420px;
        }

        .login-card h2 {
            font-size: 1.6rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            text-align: center;
        }

        .form-label {
            font-weight: 500;
        }

        .alert {
            font-size: 0.95rem;
        }

        button {
            width: 100%;
        }

        input[type="email"] {
            font-size: 0.95rem;
        }