// Animations
.animation(@animation) {
    animation: @animation;
}

.box-shadow(@shadow) {
    box-shadow: @shadow;
}

.box-sizing(@boxmodel) {
    box-sizing: @boxmodel;
}

.placeholder(@color: @input-color-placeholder) {
    &::placeholder {
        color: @color;
    }
}

.transition(@transition) {
    transition: @transition;
}
.transition-property(@transition-property) {
    transition-property: @transition-property;
}
.transition-delay(@transition-delay) {
    transition-delay: @transition-delay;
}
.transition-duration(@transition-duration) {
    transition-duration: @transition-duration;
}
.transition-timing-function(@timing-function) {
    transition-timing-function: @timing-function;
}