kazhnuz.css/scss/_definitions.scss

$large-shadow: 0px 2px 10px rgba(0, 0, 0, 0);
$narrow-shadow: 0px 2px 6px rgba(0, 0, 0, 0);
$inset-shadow: inset 0px -2px 0px rgba(0, 0, 0, 0);
$inset-shadow-inverted: inset 0px 2px 0px rgba(0, 0, 0, 0);
$inset-relief: inset 0px 2px 0px rgba(255, 255, 255, 0);

$border-radius: 0px;
$border-size: 0px;

@mixin borders() {
  border: $border-size solid rgba(0, 0, 0, 0.3)
}

@mixin border-radius() {
  border-radius: $border-radius $border-radius $border-radius $border-radius;
}

@mixin biseau($size) {
    position: relative;
    z-index:1;
    overflow: visible;

    &:before {
        content: " ";
        position: absolute;
        top:0;
        left:-$size/2;
        right:-$size/2;
        bottom:0;
        z-index:-1;
        transform: skewX(-15deg);
    }
}