Menu not working on mobile

/*================ Mobile Site Nav ================*/
.mobile-nav {
  display: block;
  @include transform(translate3d(0, 0, <img src="https://www.csscreator.com/sites/all/modules/smileys/packs/Roving/innocent.png" title="Innocent" alt="Innocent" class="smiley-content" />);
  transition: $transition-drawer;
 
  .sub-nav--is-open & {
    @include transform(translate3d(-100%, 0, <img src="https://www.csscreator.com/sites/all/modules/smileys/packs/Roving/innocent.png" title="Innocent" alt="Innocent" class="smiley-content" />);
  }
 
  .third-nav--is-open & {
    @include transform(translate3d(-200%, 0, <img src="https://www.csscreator.com/sites/all/modules/smileys/packs/Roving/innocent.png" title="Innocent" alt="Innocent" class="smiley-content" />);
  }
}
 
.mobile-nav__link,
.mobile-nav__sublist-link {
  display: block;
  width: 100%;
  padding: $nav-button-padding ($nav-button-padding * 2);
  font-size: $font-size-mobile-input;
}
 
 
.mobile-nav__link {
  position: relative;
}
 
.mobile-nav__sublist-link:not(.mobile-nav__sublist-header) {
  padding-left: $return-button-width + $nav-button-padding;
  padding-right: ($nav-button-padding * 2);
}
 
.mobile-nav__item {
  display: block;
  width: 100%;
 
  .icon {
    position: absolute;
    top: 50%;
    left: 50%;
    height: 12px;
    width: 10px;
    margin: -6px 0 0 -5px;
  }
}
 
.mobile-nav__return {
  border-right: 1px solid $color-border;
}
 
.mobile-nav__return-btn {
  position: relative;
  padding: 24px 0;
  width: $return-button-width;
}
 
.mobile-nav__icon {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  padding-left: $gutter-site-mobile;
  padding-right: $gutter-site-mobile;
  pointer-events: auto;
  overflow: hidden;
 
}
 
.mobile-nav__table {
  display: table;
  width: 100%;
}
 
.mobile-nav__table-cell {
  display: table-cell;
  vertical-align: middle;
  width: 1%;
  text-align: left;
  white-space: normal;
}
 
.mobile-nav__toggle-button {
  padding: 20px 15px;
}
 
.mobile-nav__dropdown {
  position: absolute;
  background-color: $color-body;
  z-index: $z-index-sub-nav;
  width: 100%;
  top: 0;
  right: -100%;
  display: none;
 
  .is-active + & {
    display: block;
    opacity: 1;
  }
 
  // Need the transition so `prepareTransition` removes class
  &.is-closing {
    transition: $transition-drawer;
    opacity: 0.99;
  }
 
  .mobile-nav__sublist-header {
    font-family: $font-stack-header;
    font-style: $font-style-header;
    font-weight: $font-weight-header;
    display: table-cell;
    vertical-align: middle;
    padding-left: $nav-button-padding;
  }
 
  .mobile-nav__sublist-header--main-nav-parent {
    color: $color-body-text;
  }
}
 
/*================ Mobile nav wrapper ================*/
.mobile-nav-wrapper {
  @include transform(translateY(-100%));
  position: absolute;
  top: 0;
  left: 0;
  background-color: $color-body;
  transition: $transition-drawer;
  display: none;
  overflow: hidden;
  width: 100%;
  z-index: 300;
 
  &::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    border-bottom: 1px solid $color-border;
  }
 
  &.js-menu--is-open {
    display: block;
  }
}
 
.mobile-nav--open {
  .icon-close {
    display: none;
  }
}
 
.mobile-nav--close {
  .icon-hamburger {
    display: none;
  }
}
 
.site-header__mobile-nav {
  z-index: 999;
  position: relative;
  background-color: $color-body;
 
  @include media-query($small) {
    @include display-flexbox();
    @include align-items(center);
  }
}