juju.re/jujure/themes/hello_friend/assets/scss/_menu.scss

.menu {
  z-index: 9999;
  // Default
  background: $light-background-header;

  @media (prefers-color-scheme: dark) {
    background: $dark-background-header;
  }

  @media (prefers-color-scheme: light) {
    background: $light-background-header;
  }

  [data-theme=dark] & {
    background: $dark-background-header;
  }

  [data-theme=light] & {
    background: $light-background-header;
  }

  @media #{$media-size-phone} {
    position: absolute;
    top: 50px;
    right: 0;
    border: none;
    margin: 0;
    padding: 10px;
  }

  &__inner {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 15px;
    font-size: 1rem;
    list-style: none;

    li {
      margin: 0 12px;
    }

    @media #{$media-size-phone} {
      flex-direction: column;
      align-items: flex-start;
      padding: 0;

      li {
        margin: 0;
        padding: 5px;
      }
    }
  }

  &-trigger {
    width: 24px;
    height: 24px;
    fill: currentColor;
    margin-left: 10px;
    cursor: pointer;
    display: none;

    @media #{$media-size-phone} {
      display: block;
    }
  }

  a {
    display: inline-block;
    margin-right: 15px;
    text-decoration: none;

    &:hover {
      text-decoration: underline;
    }

    &:last-of-type {
      margin-right: 0;
    }
  }
}


.submenu {
  background: $light-background-header;

  @media (prefers-color-scheme: dark) {
    background: $dark-background-header;
  }

  @media (prefers-color-scheme: light) {
    background: $light-background-header;
  }

  [data-theme=dark] & {
    background: $dark-background-header;
  }

  [data-theme=light] & {
    background: $light-background-header;
  }

  ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
  }

  li a, .dropbtn {
    display: inline-block;
    text-decoration: none;
  }

  li.dropdown {
    display: inline-block;
  }

  .dropdown-content {
    display: none;
    position: absolute;
    background: $dark-background-header;

    @media (prefers-color-scheme: light) {
      background: $light-background-header;
    }
    
    [data-theme=dark] & {
      background: $dark-background-header;
    }
  
    [data-theme=light] & {
      background: $light-background-header;
    }
  }

  .dropdown-content a {
    padding: 12px 20px;
    text-decoration: none;
    display: block;
    text-align: left;
  }

  .dropdown-content a:hover {
    background: $dark-background-header;
    
    @media (prefers-color-scheme: light) {
      background: $light-background-header;
    }

    [data-theme=dark] & {
      background: $dark-background-header;
    }
  
    [data-theme=light] & {
      background: $light-background-header;
    }
  }

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