hugo-theme-zzo/assets/sass/layout/_navigation.scss

.navbar {  
  margin: auto;
  width: inherit;
  max-width: inherit;
  height: $grid_navbar_height;
  z-index: z('navbar');
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  
  @include transition(all, 0.2s, ease);  
  @include flexbox();
  @include justify-content(space-between);
  @include themify($themes) {
    border-bottom: 1px solid themed('navbar-border-bottom-color');
    background-color: themed('navbar-background-color');
  }

  &--hide {
    top: -$grid_navbar_height;
  }

  &--show {
    top: 0;
  }

  &__slide-down {
    @for $i from 1 through 8 {
      &:nth-child(#{$i}) {
        @include animation('slide-in-down .25s #{$i * .1}s 1 ease both');
      }
    }
  }
  
  &__brand {
    height: $grid_navbar_height;

    @include flexbox();
    @include align-items(center);
    @include flex-shrink(0);  
  }

  &__burger {        
    display: none;
    position: relative;

    @include respond-to(sm) {
      cursor: pointer;
      margin-left: auto;
      position: relative;
      height: $grid_navbar_height;    
      width: $grid_navbar_height;

      @include flexbox();
      @include align-items(center);
      @include justify-content(flex-end);

      span {
        @include themify($themes) {
          background-color: themed('burger-menu-color');
        }        
        
        border-radius: 1rem;
        display: block;
        height: 2px;
        left: calc(50% - 8px);
        position: absolute;
        transform-origin: center;
        transition-duration: 86ms;
        transition-property: background-color, opacity, transform;
        transition-timing-function: ease-out;
        width: 16px;
        &:nth-child(1) {
          top: calc(50% - 6px);
        }      
        &:nth-child(2) {
          top: calc(50% - 1px);
        } 
        &:nth-child(3) {
          top: calc(50% + 4px);
        }      
      }      
          
      &:hover {
        span {
          @include themify($themes) {
            background-color: themed('link-hover');
          }
        }        
      }

      // Modifers
      &.is-active {
        display: block;
        span {
          &:nth-child(1) {
            transform: translateY(5px) rotate(45deg);
          }        
          &:nth-child(2) {
            opacity: 0;
          }        
          &:nth-child(3) {
            transform: translateY(-5px) rotate(-45deg);
          }        
        }      
      }
    }    
  }

  &__logo {
    width: 100%;
    height: 100%;

    &-link {
      width: 40px;
      height: 40px;
      padding: 0.1rem;
      margin: auto 0.25rem;
      @include flex-shrink(0);
      flex-shrink: 0;
    }
  }

  &__title {
    height: $grid_navbar_height;
    font-size: 1.5rem;
    @include flexbox();
    @include align-items(center);        
    
    &-link {
      @include themify($themes) {
        color: themed("navbar-title-color");
        @include on-event {
            text-decoration: none;
            color: themed("navbar-title-color");
        }
      }
    }
  }

  &__menu {
    @include flex-grow(1);
    @include flexbox();
    @include align-items(center);
    @include justify-content(flex-end);
    height: $grid_navbar_height;
    position: relative;
    
    @include respond-to(sm) {
      display: none;
    }

    &-item {
      height: $grid_navbar_height;      
      padding: 0.5rem;
      font-size: 1rem;
      font-family: $navbar_item_font;
      font-weight: 400;

      @include flexbox();
      @include align-items(center);
      @include justify-content(center);
      @include no-select;
      @include themify($themes) {
        color: themed('navbar-title-color');        
        @include on-event {
          color: themed('navbar-title-hover-color');
          background-color: themed('navbar-menu-hover-background-color');
          text-decoration: none;
          border-bottom: 1px solid themed('navbar-border-bottom-color');
          @include respond-to(sm) {
            border-bottom: none;
          }

        }
        &.active {
          color: themed('navbar-title-active-color') !important;
        }
      }

      @include respond-to(sm) {
        @include justify-content(flex-start);
        width: 100%;
        padding: 0 0.75rem;
      }
    }

    &-icon {
      margin-top: 0.4rem;
    }

    &.is-active {
      position: absolute;
      @include flexbox();
      @include flex-direction(column);
      @include align-items(flex-start);
      top: 100%;
      width: 100%;
      height: auto;      
      overflow: hidden; 
      @include themify($themes) {        
        border-top: 1px solid themed('navbar-dropdown-item-hover-background-color');
        background-color: themed('navbar-background-color');
      }
    }
  }

  &__dropdown {
    display: inline-block;
    height: $grid_navbar_height;
    @include respond-to(sm) {
      width: 100%;
      height: auto;
    }

    &--content {
      position: absolute;
      display: none;
      width: inherit;      
      z-index: z("dropdown");
      border-bottom-left-radius: 0.15rem;
      border-bottom-right-radius: 0.15rem;

      @include box-shadow(0, 1px, 3px, 0, rgba(0, 0, 0, 0.4));
      @include themify($themes) {
        border-top: 4px solid themed("dropdown-border-top-color");
        background-color: themed("dropdown-content-background-color");
      }
      @include respond-to(sm) {
        position: relative;
        display: block;
        box-shadow: none;
        @include themify($themes) {
          border-top: none;
          background-color: themed("navbar-background-color");          
        }
      }      
    }

    &--item {
      padding: 0.25rem 0.75rem;
      height: auto;
      margin: auto;
      text-decoration: none;
      display: block;
      font-size: 1rem;

      // @for $i from 1 through 4 {        
      //   &:nth-child(#{$i}) {
      //     @include animation('slide-in-down .25s #{$i * .1}s 1 ease both');
      //   }
      // }

      @include themify($themes) {
        color: themed("dropdown-item-color");
        @include on-event {
          color: themed("navbar-dropdown-item-hover-color");
          background-color: themed("navbar-menu-hover-background-color");
          text-decoration: none;          

          &:last-child {
            border-bottom-left-radius: 0.15rem;
            border-bottom-right-radius: 0.15rem;
          }
        }
      }

      @include respond-to(sm) {
        padding-left: 2.5rem;
      }
    }
  }
}

.navbar__dropdown:hover .navbar__dropdown--content {
  display: block;
}