.nk-heading-font,
.nk-portfolio-item-title,
h1, .h1,
h2, .h2,
h3, .h3,
h4, .h4,
h5, .h5,
h6, .h6,
.display-1,
.display-2,
.display-3,
.display-4,
.display-big,
.display-extra-big {
    font-weight: 500;
}