@mixin pseudo($t: 0, $r: 0, $b: 0, $l: 0) {
    content: "";
    position: absolute;
    top: $t;
    left: $l;
    right: $r;
    bottom: $b;
}

@mixin bg-props($s: cover, $p: center top, $r: no-repeat) {
    background-size: $s;
    background-position: $p;
    background-repeat: $r;
}
@mixin bg-overlay($t: 0, $r: 0, $b: 0, $l: 0) {
    position: absolute;
    content: "";
    top: $t;
    left: $l;
    right: $r;
    bottom: $b;
    height: 100%;
    width: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: -1;
}
@mixin flexbox($a: inherit, $jc: space-between) {
    align-items: $a;
    display: flex;
    flex-wrap: wrap;
    justify-content: $jc;
}
@mixin transform($t: 50%, $l: 50%) {
    position: absolute;
    top: $t;
    left: $l;
    transform: translate(-$t, -$l);
}
