.mainHeader {
    display: flex;
    height: 4.5rem;
    border-bottom: 1px white solid;
}

.leftSection {
    display: flex;
    align-items: center;
    margin-left: 20px;
}

.mainTitle {
    margin: 0;
    font-size: 1.5rem;
    font-weight: bold;
}

.activityHeading {
    font-size: 2rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1.5rem;
}


@media (max-width: 700px) {
    .mainHeader {
        height: auto;
        flex-direction: column;
        align-items: flex-start;
        padding: 0.5rem;
    }

    .mainTitle {
        font-size: 1.2rem;
    }

    .activityHeading {
        font-size: 1.2rem;
        margin-top: 1rem;
    }
}