.gradient-bg {
            background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
        }
        .card-hover:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
        }
        .input-focus:focus {
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.5);
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.05);
            }
            100% {
                transform: scale(1);
            }
        }
        body {
            transition: background-color 0.3s ease;
        }
        .tab-btn {
            transition: all 0.3s ease;
        }
        .tab-btn.active {
            position: relative;
        }
        .tab-btn.active:after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: currentColor;
        }