.test-series-container {
    display: flex;
    flex-wrap: wrap;
    margin: 20px;
}

.test-series-left, .test-series-right {
    flex: 1 1 45%;
    margin: 10px;
}

label {
    font-weight: bold;
    display: block;
    margin-bottom: 8px;
}

select {
    width: 100%;
    padding: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.test-series-right {
    padding: 10px;
    background-color: #f9f9f9;
}

#test-content p {
    display: none;
    font-size: 16px;
}

@media (max-width: 768px) {
    .test-series-container {
        flex-direction: column;
    }
    .test-series-left, .test-series-right {
        flex: 1 1 100%;
    }
}