nikolasf Hi
It's padding value set for the main body section in template. You can override this css rule:
@media (min-width: 768px) {
.t4-main-body {
padding-top: 4.5rem;
padding-bottom: 4.5rem;
}
}
#t4-main-body .t4-row>div {
padding-left: 18px;
padding-right: 18px;
}
and adjust to suit your need.