body {
            background: linear-gradient(135deg, #2fa4e7 0%, #1a7ab8 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .login-container {
            width: 100%;
            max-width: 400px;
            padding: 20px;
        }
        .login-card {
            background: white;
            border-radius: 10px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.2);
            padding: 40px 30px;
        }
        .login-header {
            text-align: center;
            margin-bottom: 30px;
        }
        .login-header h1 {
            color: #333;
            font-size: 1.8rem;
            margin-bottom: 10px;
        }
        .login-header i {
            color: #2fa4e7;
        }
        .form-label {
            font-weight: 500;
            color: #555;
        }
        .btn-login {
            background: linear-gradient(135deg, #2fa4e7 0%, #1a7ab8 100%);
            border: none;
            color: white;
            font-weight: 600;
            padding: 12px;
            width: 100%;
            border-radius: 5px;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 20px rgba(47, 164, 231, 0.4);
        }
        .error-message {
            color: #dc3545;
            font-size: 0.9rem;
            text-align: center;
            margin-bottom: 15px;
        }