.secDefault {
    min-height: 1000px;
    max-height: content;
    padding: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.about, .testimonial {
    background-color: #f8f7f2;
}

.gallery, .contact {
    background-color: #a69981;
}

.mainContainer {
    max-width: calc(100vh * 4 / 3);
    width: 100%;
    min-height: 900px;
    max-height: content;
}

.mainContainer > * {
    padding: 25px;
}

@media (max-width: 830px) {
    .mainContainer {
        max-width: 100%;
    }

    .secDefault {
        padding: 10px;
    }
}