AdminLTE/build/scss/_sidebar.scss

/*
 * Component: Sidebar
 * ------------------
 *
//Main Sidebar
.main-sidebar {
  position: absolute;
  top: $main-header-height;
  left: 0;
  @include calc("min-height", "100% - #{$main-header-height}");
  z-index: 810;
  width: $sidebar-width;
  transition: transform $transition-speed $transition-fn,
              width $transition-speed $transition-fn;
  .layout-fixed & {
    height: 100%;
    overflow-y: auto;
    padding-bottom: 55px;
  }
  @include media-breakpoint-down(md) {
    @include translate(-$sidebar-width, 0);
  }
  .sidebar-collapse & {
    @include media-breakpoint-up(md) {
      @include translate(-$sidebar-width, 0);
    }
  }
  .sidebar-open & {
    @include media-breakpoint-down(md) {
      @include translate(0, 0);
    }
  }
}*/
.sidebar {
  padding-bottom: 10px;
}
//Sidebar user panel
.user-panel {
  position: relative;
  width: 100%;
  padding: 10px;
  overflow: hidden;
  @include clearfix();
  > .image > img {
    width: 100%;
    max-width: 45px;
    height: auto;
  }
  > .info {
    padding: 5px 5px 5px 15px;
    line-height: 1;
    position: absolute;
    left: 55px;
    > p {
      font-weight: 600;
      margin-bottom: 9px;
    }
    > a {
      text-decoration: none;
      padding-right: 5px;
      margin-top: 3px;
      font-size: 11px;
      > .fa,
      > .ion,
      > .glyphicon {
        margin-right: 3px;
      }
    }
  }
}

// Sidebar menu
.nav-sidebar {
  //First Level
  > .nav-item {
    > .nav-link {
      @include border-radius(0);
      > .nav-icon {
        width: 20px;
      }
    }
    .pull-right {
      margin-top: 3px;
      margin-right: 5px;
    }
  }
  .nav-header {
    padding: $nav-link-padding;
    font-size: .85em;
  }
  // All other levels
  .nav-link > .fa-angle-left {
    width: auto;
    height: auto;
    padding: 0;
    margin-right: 10px;
    margin-top: 3px;
  }
  .nav-item.active {
    > .nav-link {
      font-weight: $display1-weight;
    }
    > .nav-link > .fa-angle-left {
      @include rotate(-90deg);
    }
    > .nav-treeview {
      display: block;
    }
  }

  // Tree view menu
  .nav-treeview {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    padding-left: 5px;
    .nav-treeview {
      padding-left: 20px;
    }
    > .nav-item {
      margin: 0;
      > .nav-link {
        padding: 5px 5px 5px 15px;
        display: block;
        font-size: 14px;
        > .nav-icon {
          width: 20px;
        }
      }
    }
  }
}