// Disable sidenav animations for the initial render.
.starting.mat-drawer-transition .mat-drawer-content {
  transition: none;
}

aio-nav-menu {
  display: block;
  margin: 0 auto;
  max-width: 260px;
  @include font-size(13);

  ul, a {
    margin: 0;
  }

  &:first-child {
    margin-top: 16px;
  }

  aio-nav-item div a {
    padding-left: 6px;
  }
}

mat-sidenav.mat-sidenav.sidenav {
  position: fixed;
  top: 64px;
  bottom: 0;
  left: 0;
  padding: 0;
  min-width: 260px;
  background-color: $white;
  box-shadow: 6px 0 6px rgba(0,0,0,0.10);

  &.collapsed {
    top: 56px;
  }
}

mat-sidenav-container.sidenav-container {
  min-height: 100%;
  height: auto !important;
  max-width: 100%;
  margin: 0;
  transform: none;

  &.has-floating-toc {
    max-width: 82%;
  }
}

mat-sidenav-container.sidenav-container.mat-drawer-container.mat-sidenav-container,
mat-sidenav-container .sidenav-content {
  background-color: $white;
}

mat-sidenav-container div.mat-sidenav-content {
  height: auto;
}

.vertical-menu-item {
  box-sizing: border-box;
  color: $darkgray;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  overflow-wrap: break-word;
  padding: 8px;
  text-decoration: none;
  text-align: left;
  width: 100%;
  word-wrap: break-word;

  &:hover {
    background-color: $lightgray;
    color: $blue;
    text-shadow: 0 0 5px #ffffff;
  }

  &:focus {
    outline: $focus-outline-onlight auto 2px;
  }

  &.selected {
    color: $blue;
  }

  &.level-2 {
    padding-top: 4px;
    padding-bottom: 4px;
  }

  span {
    padding-right: 32px;
  }

  //icons _within_ nav
  .mat-icon {
    height: 24px;
    width: 24px;
  }
}

button.vertical-menu-item {
  border: none;
  background-color: transparent;
  padding-top: 10px;
  padding-bottom: 10px;
  margin: 0;
  width: 100%;
}

.heading {
  color: $darkgray;
  cursor: pointer;
  position: relative;
  text-transform: uppercase;
}

.heading-children {
  &.expanded {
    visibility: visible;
    opacity: 1;
    padding-left: 0;
    max-height: 4000px; // Arbitrary max-height. Can increase if needed. Must have measurement to transition height.
    transition: visibility 500ms, opacity 500ms, max-height 500ms;
    transition-timing-function: ease-in-out;
  }

  &.collapsed {
    overflow: hidden;  // Needed to prevent unnecessary sidenav scrollbar.
    visibility: hidden;
    padding-left: 0;
    opacity: 0;
    max-height: 1px; // Must have measurement to transition height.
    transition: visibility 275ms, opacity 275ms, max-height 280ms;
    transition-timing-function: ease-out;
  }
}

.no-animations {
  .heading-children.expanded,
  .heading-children.collapsed {
    transition: none! important;
  }
}

.level-1 {
  font-family: $main-font;
  @include font-size(14);
  font-weight: 400;
  padding-left: 20px;
  margin: 0;
  transition: background-color 0.2s;
  text-transform: uppercase;

  &.expanded .mat-icon,
  .level-2.expanded .mat-icon {
    @include rotate(90deg);
  }

  &:not(.expanded) .mat-icon,
  .level-2:not(.expanded) .mat-icon {
    @include rotate(0deg);
  }

}

.level-2 {
  color: $mediumgray;
  font-family: $main-font;
  @include font-size(14);
  font-weight: 400;
  margin: 0;
  padding-left: 32px;
  text-transform: none;

  &.expanded .mat-icon,
  .level-3.expanded .mat-icon {
    @include rotate(90deg);
  }

  &:not(.expanded) .mat-icon,
  .level-3:not(.expanded) .mat-icon {
    @include rotate(0deg);
  }
}

.level-3 {
  color: $mediumgray;
  font-family: $main-font;
  @include font-size(14);
  margin: 0;
  padding-left: 40px;
  text-transform: none;
}

.level-4 {
  color: $mediumgray;
  font-family: $main-font;
  @include font-size(14);
  margin: 0;
  padding-left: 48px;
  text-transform: none;
}

aio-nav-menu.top-menu {
  padding: 24px 0 0;

  aio-nav-item:last-child div {
    border-bottom: 1px solid rgba($mediumgray, 0.5);
  }

  aio-nav-item:first-child div {
    border-top: 1px solid rgba($mediumgray, 0.5);
  }
}

// Angular Version Selector
mat-sidenav .doc-version {
  padding: 8px;
  border-top: 1px solid $lightgray;

  select {
    outline: none;
    width: 100%;
    background: rgba($lightgray, 0.5);
    height: 32px;
    border: 1px solid $lightgray;
    color: $darkgray;

    option {
      font-family: $main-font;
      @include font-size(14);
    }
  }
}
