.line-full{
    position: relative
}

.line-full::after{
    content: "";
    position: absolute;
    height: 2px;
    background-color: var(--blue);
    width: calc(100% - var(--gap));
    left: calc(var(--gap) / 2);
    right: calc(var(--gap) / 2);
    top: -3px;
}