_promo-banner.scss

.promo {
    &-banner {
        width: 100%;
        height: 0;
        transition-property: all;
        transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
        transition-duration: 0.15s;
        &.active {
            height: 50px;
        }
    }
}

.close {
    &-banner {
        right: 0;
        top: 0;
        bottom: 0;
        display: flex;
        align-items: center;
        width: 20px;
        height: 100%;
        margin-right: 20px;
        justify-content: center;
        cursor: pointer;
    }
}