bulma/sass/components/navbar.sass

$navbar-background: $white !default
$navbar-height: 3.25rem !default

$navbar-item: $grey-dark !default
$navbar-item-hover: $black !default
$navbar-item-hover-background: $background !default
$navbar-item-active: $black !default
$navbar-item-active-background: transparent !default

$navbar-dropdown-background: $white !default
$navbar-dropdown-border: $border !default
$navbar-dropdown-offset: -4px !default
$navbar-dropdown-arrow: $link !default
$navbar-dropdown-radius: $radius-large !default
$navbar-dropdown-z: 20 !default

$navbar-dropdown-item-hover: $black !default
$navbar-dropdown-item-hover-background: $background !default
$navbar-dropdown-item-active: $primary !default
$navbar-dropdown-item-active-background: $background !default

$navbar-divider-background: $border !default

.navbar
  background-color: $navbar-background
  min-height: $navbar-height
  position: relative

.navbar-brand
  align-items: stretch
  height: $navbar-height
  display: flex

.navbar-burger
  +hamburger($navbar-height)
  margin-left: auto

.navbar-menu
  display: none

.navbar-item,
.navbar-link
  color: $navbar-item
  display: block
  line-height: 1.5
  padding: 0.5rem 1rem
  position: relative

a.navbar-item,
.navbar-link
  &:hover,
  &.is-active
    background-color: $navbar-item-hover-background
    color: $navbar-item-hover

.navbar-item
  flex-grow: 0
  flex-shrink: 0
  img
    max-height: 1.75rem
  &.has-dropdown
    padding: 0

.navbar-content
  flex-grow: 1
  flex-shrink: 1

.navbar-link
  padding-right: 2.5em

.navbar-dropdown
  font-size: 0.875rem
  padding-bottom: 0.5rem
  padding-top: 0.5rem
  .navbar-item
    padding-left: 1.5rem
    padding-right: 1.5rem

.navbar-divider
  background-color: $navbar-divider-background
  border: none
  display: none
  height: 1px
  margin: 0.5rem 0

+touch
  .navbar-brand
    .navbar-item
      align-items: center
      display: flex
  .navbar-menu
    box-shadow: 0 8px 16px rgba($black, 0.1)
    padding: 0.5rem 0
    &.is-active
      display: block

+desktop
  .navbar,
  .navbar-menu,
  .navbar-start,
  .navbar-end
    align-items: stretch
    display: flex
  .navbar
    height: $navbar-height
    &.is-transparent
      a.navbar-item,
      .navbar-link
        &:hover,
        &.is-active
          background-color: transparent
      .navbar-item.has-dropdown
        &.is-active,
        &.is-hoverable:hover
          .navbar-link
            background-color: transparent
      .navbar-dropdown
        a.navbar-item
          &:hover
            background-color: $navbar-dropdown-item-hover-background
            color: $navbar-dropdown-item-hover
          &.is-active
            background-color: $navbar-dropdown-item-active-background
            color: $navbar-dropdown-item-active
  .navbar-burger
    display: none
  .navbar-item,
  .navbar-link
    align-items: center
    display: flex
  .navbar-item
    &.has-dropdown
      align-items: stretch
    &.is-active,
    &.is-hoverable:hover
      .navbar-dropdown
        display: block
        &.is-boxed
          opacity: 1
          pointer-events: auto
          transform: translateY(0)
  .navbar-link
    &::after
      +arrow($navbar-dropdown-arrow)
      margin-top: -0.375em
      right: 1.125em
      top: 50%
  .navbar-menu
    flex-grow: 1
    flex-shrink: 0
  .navbar-start
    justify-content: flex-start
    margin-right: auto
  .navbar-end
    justify-content: flex-end
    margin-left: auto
  .navbar-dropdown
    background-color: $navbar-dropdown-background
    border-bottom-left-radius: $navbar-dropdown-radius
    border-bottom-right-radius: $navbar-dropdown-radius
    border-top: 1px solid $navbar-dropdown-border
    box-shadow: 0 8px 8px rgba($black, 0.1)
    display: none
    font-size: 0.875rem
    left: 0
    min-width: 100%
    position: absolute
    top: 100%
    z-index: $navbar-dropdown-z
    .navbar-item
      padding: 0.375rem 1rem
      white-space: nowrap
    a.navbar-item
      padding-right: 3rem
      &:hover
        background-color: $navbar-dropdown-item-hover-background
        color: $navbar-dropdown-item-hover
      &.is-active
        background-color: $navbar-dropdown-item-active-background
        color: $navbar-dropdown-item-active
    &.is-boxed
      border-radius: $navbar-dropdown-radius
      border-top: none
      box-shadow: 0 8px 8px rgba($black, 0.1), 0 0 0 1px rgba($black, 0.1)
      display: block
      opacity: 0
      pointer-events: none
      top: calc(100% + (#{$navbar-dropdown-offset}))
      transform: translateY(-5px)
      transition-duration: $speed
      transition-property: opacity, transform
  .navbar-divider
    display: block
  .container > .navbar
    margin-left: -1rem
    margin-right: -1rem
  // Hover/Active states
  a.navbar-item,
  .navbar-link
    &.is-active
      color: $navbar-item-active
    &.is-active:not(:hover)
      background-color: $navbar-item-active-background
  .navbar-item.has-dropdown
    &:hover,
    &.is-active
      .navbar-link
        background-color: $navbar-item-hover-background