body {
            font-family: 'Inter', sans-serif;
        }
        .tab-button.active {
            border-color: #3b82f6;
            color: #3b82f6;
            font-weight: 600;
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }
        select:disabled {
            background-color: #f3f4f6;
            cursor: not-allowed;
        }
        /* Animasi sederhana untuk hasil */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .result-item {
            animation: fadeIn 0.5s ease-out forwards;
        }