AdminLTE/build/scss/_mixins.scss

// AdminLTE mixins
// ===============

// Changes the color and the hovering properties of the navbar
@mixin navbar-variant($color, $font-color: rgba(255, 255, 255, 0.8), $hover-color: #f6f6f6, $hover-bg: rgba(0, 0, 0, 0.1)) {
  background-color: $color;
  // Navbar links
  .nav > li > a {
    color: $font-color;
  }

  .nav > li > a:hover,
  .nav > li > a:active,
  .nav > li > a:focus,
  .nav .open > a,
  .nav .open > a:hover,
  .nav .open > a:focus,
  .nav > .active > a {
    background: $hover-bg;
    color: $hover-color;
  }

  // Add color to the sidebar toggle button
  .sidebar-toggle {
    color: $font-color;
    &:hover,
    &:focus {
      color: $hover-color;
      background: $hover-bg;
    }
  }
}

// Logo color variation
@mixin logo-variant($bg-color, $color: #fff, $border-bottom-color: transparent, $border-bottom-width: 0) {
  background-color: $bg-color;
  color: $color;
  border-bottom: $border-bottom-width solid $border-bottom-color;

  &:hover,
  &:focus {
    background-color: darken($bg-color, 1%);
  }
}

// Box solid color variantion creator
@mixin box-solid-variant($color, $text-color: #fff) {
  border: 1px solid $color;
  > .card-header {
    color: $text-color;
    background: $color;
    background-color: $color;
    a,
    .btn {
      color: $text-color;
    }
  }
}

// Direct Chat Variant
@mixin direct-chat-variant($bg-color, $color: #fff) {
  .right > .direct-chat-text {
    background: $bg-color;
    border-color: $bg-color;
    color: color-yiq($bg-color);
    &:after,
    &:before {
      border-left-color: $bg-color;
    }
  }
}

@mixin translate($x, $y) {
  -webkit-transform: translate($x, $y);
  -ms-transform: translate($x, $y); // IE9 only
  transform: translate($x, $y);
}

// Different radius each side
@mixin border-radius-sides($top-left, $top-right, $bottom-left, $bottom-right) {
  border-radius: $top-left $top-right $bottom-left $bottom-right;
}

@mixin calc($property, $expression) {
  #{$property}: -webkit-calc(#{$expression});
  #{$property}: calc(#{$expression});
}

@mixin rotate($value) {
  -ms-transform: rotate($value);
  transform: rotate($value);
}

@mixin animation($animation) {
  animation: $animation;
}

// Gradient background
@mixin gradient($color: #F5F5F5, $start: #EEE, $stop: #FFF) {
  background: $color;
  background: -webkit-gradient(linear, left bottom, left top, color-stop(0, $start), color-stop(1, $stop));
  background: -ms-linear-gradient(bottom, $start, $stop);
  background: -moz-linear-gradient(center bottom, $start 0%, $stop 100%);
  background: -o-linear-gradient($stop, $start);
}

// Skins Mixins

// Dark Sidebar Mixin
@mixin skin-dark-sidebar($link-hover-border-color) {
  // Sidebar background color
  background-color: $sidebar-dark-bg;

  // User Panel (resides in the sidebar)
  .user-panel {
    a:hover {
      color: $sidebar-dark-hover-color;
    }

    .status {
      color: $sidebar-dark-color;
      background: $sidebar-dark-hover-bg;
      &:hover,
      &:focus,
      &:active {
        color: $sidebar-dark-hover-color;
        background: darken($sidebar-dark-hover-bg, 3%);
      }
    }

    .dropdown-menu {
      border-color: darken($sidebar-dark-hover-bg, 5%);
      @include box-shadow(0 2px 4px rgba(0, 0, 0, .4));
    }

    .dropdown-item {
      color: $body-color;
    }
  }

  // Sidebar Menu. First level links
  .nav-sidebar > .nav-item {
    // links
    > .nav-link {
      // border-left: 3px solid transparent;
      &:active {
        color: $sidebar-dark-color;
      }
    }

    // Hover and active states
    &.menu-open > .nav-link,
    &:hover > .nav-link,
    & > .nav-link:focus  {
      color: $sidebar-dark-hover-color;
      background-color: $sidebar-dark-hover-bg;
    }

    > .nav-link.active {
      color: $sidebar-dark-hover-color;
      background-color: $link-hover-border-color;
      @if $enable-shadows {
        @extend .elevation-1;
      }
    }

    // First Level Submenu
    > .nav-treeview {
      background: $sidebar-dark-submenu-bg;
    }
  }

  // Section Heading
  .nav-header {
    color: lighten($sidebar-dark-color, 5%);
    background: inherit; //darken($sidebar-dark-bg, 3%);
  }

  // All links within the sidebar menu
  .sidebar a {
    color: $sidebar-dark-color;
    &:hover,
    &:focus {
      text-decoration: none;
    }
  }

  // All submenus
  .nav-treeview {
    > .nav-item {
      > .nav-link {
        color: $sidebar-dark-submenu-color;

        &:hover,
        &:focus {
          color: $sidebar-dark-submenu-hover-color;
          background-color: $sidebar-dark-submenu-hover-bg
        }
      }

      > .nav-link.active {
        &,
        &:hover,
        &:focus {
          color: $sidebar-dark-submenu-active-color;
          background-color: $sidebar-dark-submenu-active-bg;
        }
      }
    }
  }
}

// Light Sidebar Mixin
@mixin skin-light-sidebar($link-hover-border-color) {
  // Sidebar background color
  background-color: $sidebar-light-bg;

  // User Panel (resides in the sidebar)
  .user-panel {
    a:hover {
      color: $sidebar-light-hover-color;
    }

    .status {
      color: $sidebar-light-color;
      background: $sidebar-light-hover-bg;
      &:hover,
      &:focus,
      &:active {
        color: $sidebar-light-hover-color;
        background: darken($sidebar-light-hover-bg, 3%);
      }
    }

    .dropdown-menu {
      border-color: darken($sidebar-light-hover-bg, 5%);
      @include box-shadow(0 2px 4px rgba(0, 0, 0, .4));
    }

    .dropdown-item {
      color: $body-color;
    }
  }

  // Sidebar Menu. First level links
  .nav-sidebar > .nav-item {
    // links
    > .nav-link {
      // border-left: 3px solid transparent;
      &:active,
      &:focus {
        color: $sidebar-light-color;
      }
    }

    // Hover and active states
    &.menu-open > .nav-link,
    &:hover > .nav-link {
      color: $sidebar-light-hover-color;
      background-color: $sidebar-light-hover-bg;
    }

    > .nav-link.active {
      color: $sidebar-light-active-color;
      background-color: $link-hover-border-color;
      @if $enable-shadows {
        @extend .elevation-1;
      }
    }

    // First Level Submenu
    > .nav-treeview {
      background: $sidebar-light-submenu-bg;
    }
  }

  // Section Heading
  .nav-header {
    color: darken($sidebar-light-color, 5%);
    background: inherit;
  }

  // All links within the sidebar menu
  .sidebar a {
    color: $sidebar-light-color;
    &:hover {
      text-decoration: none;
    }
  }

  // All submenus
  .nav-treeview {
    > .nav-item {
      > .nav-link {
        color: $sidebar-light-submenu-color;
      }

      > .nav-link.active {
        &,
        &:hover {
          color: $sidebar-light-submenu-active-color;
          background-color: $sidebar-light-submenu-active-bg;
        }
      }

      > .nav-link:hover {
        background-color: $sidebar-light-submenu-hover-bg;
      }
    }
  }
}