.main {
    padding: 10px 20px;
    width: 1200px;
    margin: auto;
}

.main * {
    transition: all 0.4s;
}

.main .main_content {
    margin: 50px 0 40px;
    column-gap: 20px;
    width: 100%;
}

.main .main_content .picture_wrapper {
    margin-bottom: 20px;
}

.main .main_content .picture_wrapper img {
    height: 100%;
    width: 100%;
    object-fit: cover;
    border-radius: 2px;
}

.main .main_content .picture_wrapper img:hover {
    transform: scale(1.05);
}

/* responsive */
@media (min-width: 1200px) {
    .main_content {
        column-count: 4;
    }
}

@media (min-width: 768px) and (max-width: 1199px) {
    .main_content {
        column-count: 3;
    }
}

@media (min-width: 576px) and (max-width: 767px) {
    .main_content {
        column-count: 2;
    }
}

@media (max-width: 575px) {
    .main_content {
        column-count: 1;
    }
}