tabler/scss/layout/_navbar.scss

.navbar {
  background: #fff;
  border-bottom: 1px solid $border-color;
  display: flex;
  min-height: 3.75rem;
  padding: .75rem 1rem;
  width: 100%;

  .nav-link {
    color: inherit;
    white-space: nowrap;
  }
}

.navbar-nav {
  flex-direction: row;

  .navbar-nav {
    padding-left: .5rem;
    padding-right: .5rem;
  }
}

.navbar-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin: 0;

  @at-root a#{&} {
    transition: .3s opacity;

    &:hover {
      opacity: .8;
    }
  }
}

.navbar-brand-logo {
  height: 2rem;
}

/**
Fixed navbar
 */
.navbar-fixed {
  position: fixed;
  z-index: $zindex-sticky;

  &.navbar-side {
    top: 0;
    left: 0;
    bottom: 0;

    &.navbar-right {
      right: 0;
      left: auto;
    }
  }
}

/**
Navbar expand
 */
@each $breakpoint, $dimension in $grid-breakpoints {
  .navbar-expand-#{$breakpoint} {
    display: none;

    @include media-breakpoint-up(#{$breakpoint}) {
      display: block;
      padding-right: 0;
      padding-left: 0;

      .navbar-nav {
        margin-right: 0;
        margin-left: 0;
      }

      .navbar-nav .nav-link {
        padding: .5rem $sidenav-link-padding-x;

        &.active {
          position: relative;

          &::before {
            top: auto;
            right: $sidenav-link-padding-x;
            bottom: calc(-#{$navbar-padding-y} - #{$border-width});
            left: $sidenav-link-padding-x;
            border-bottom: 1px solid $primary;
            border-left: 0;
          }
        }
      }


      > .container,
      > .container-fluid {
        padding-right: 0;
        padding-left: 0;
      }

      &.navbar-side.navbar-fixed {
        @include media-breakpoint-up(#{$breakpoint}) {
          ~ .main-content {
            margin-left: $sidenav-width;
          }

          &.navbar-right ~ .main-content {
            margin-right: $sidenav-width;
            margin-left: 0;
          }
        }
      }
    }
  }
}


/*
Sidebar
 */
.navbar-side {
  width: $sidenav-width;
  min-width: $sidenav-width;
  background: $sidenav-bg;
  border-right: 1px solid $sidenav-border-color;
  user-select: none;

  .nav-link {
    display: flex;
    align-items: center;
    color: $text-muted;
    transition: .3s background, .3s box-shadow;

    &.active,
    &:hover {
      color: $body-color;
      background: rgba($link-color, .04);
      border-color: $primary;
      box-shadow: inset 2px 0 0 0 $primary;
    }

    > .icon {
      width: 2rem;
    }

    &[data-toggle="collapse"] {
      &.active {
        background: none;
        box-shadow: none;
      }

      &:after {
        display: block;
        font-family: $font-icons !important;
        content: $icon-fe-chevron-down;
        margin-left: auto;
        transition: transform .3s;
      }

      &[aria-expanded="true"]:after {
        transform: rotate(-180deg);
      }
    }
  }

  &:not(.sidenav-folded) {
    .nav-item .nav-item .nav-link {
      padding-left: 2.5rem;
    }

    .nav-item .nav-item .nav-item .nav-link {
      padding-left: 3.5rem;
    }

    .nav-item .nav-item .nav-item .nav-item .nav-link {
      padding-left: 4.5rem;
    }
  }

  .nav-link-title {
    display: flex;
    width: 100%;
    align-items: center;
  }

  .navbar-brand {
    text-align: center;
  }

  .navbar-heading {
    @extend .text-subheader;
    padding: .5rem $sidenav-link-padding-x;
    margin: 0;
  }

  .navbar-nav {
    flex-direction: column;
  }
}

/*
Right navbar
 */
.navbar-right {
  order: 9;
  border-right: none;
  border-left: 1px solid $sidenav-border-color;
}

/*
Dark navbar
 */
.navbar-dark {
  color: #fff;
  background-color: $sidenav-dark-bg;
  border: none;

  .navbar-brand {
    filter: brightness(0) invert(1);
  }

  .navbar-divider {
    border-color: rgba(#fff, .2);
  }

  .nav-link {
    color: $text-muted-light;

    &.active,
    &:hover {
      color: $white;
      background: rgba($white, .04);
    }
  }
}

/**
Utils
 */
.hide-sidenav-folded {
  @at-root .sidenav.sidenav-folded & {
    display: none;
  }
}

.hide-sidenav-expanded {
  @at-root .sidenav:not(.sidenav-folded) & {
    display: none;
  }
}