#nav
  position: relative
  margin-bottom: 1rem
  width: 100%
  background-color: $light-blue
  background-attachment: local
  background-position: center
  background-size: cover

  &.full_page
    display: flex
    align-items: center
    height: $index_top_img_height

  &.not_index_bg
    height: 20rem

  #site-social-icons
    display: none
    margin: 0 auto
    width: 15rem
    text-align: center

    .social-icon
      margin: 0 .5rem
      color: $light-grey
      text-shadow: .1rem .1rem .2rem rgba(0, 0, 0, .15)
      font-size: .9rem
      cursor: pointer

      &:hover
        color: $white

#site-info
  position: absolute
  width: 100%

#site-title,
#site-sub-title
  color: $light-grey
  text-align: center
  text-shadow: .1rem .1rem .2rem rgba(0, 0, 0, .15)
  line-height: 1.5

#site-title
  font-weight: bold
  font-size: 1.3rem

#site-sub-title
  font-size: .8rem

#page_site-info
  position: absolute
  top: 10rem
  width: 100%

.scroll-down
  position: absolute
  bottom: 0
  width: 100%
  height: 42px
  text-align: center
  font-size: 30px
  cursor: pointer

  .scroll-down-effects
    position: absolute
    color: $white

header
  position: relative

#page-header
  position: absolute
  top: 0
  z-index: 99
  padding: 10px 36px
  width: 100%
  height: 58px
  border: none
  font-size: 18px
  opacity: 0
  transition: all .5s

  .toggle-menu
    display: none
    padding: .1rem 0 0 .3rem

    &:hover
      color: $white

    &.is_visible
      .site-page
        font-size: inherit

  a
    color: $light-grey
    text-decoration: none

    &:hover
      color: $white

  &.fixed
    position: fixed
    top: -60px
    z-index: 101
    background: alpha($white, .8)
    box-shadow: 0 5px 6px -5px alpha($grey, .6)
    transition: transform .2s ease-in-out, opacity .2s ease-in-out

    &.open-sidebar
      .site-page
        visibility: hidden

    a,
    #site-name,
    .toggle-menu
      color: $light-black
      text-shadow: none

      &:hover
        color: $light-blue

  &.visible
    transition: all .5s
    transform: translate3d(0, 100%, 0)

    .menus_item_child
      background-color: $white !important

  #site-name
    text-shadow: .1rem .1rem .2rem rgba(0, 0, 0, .15)
    font-weight: bold
    cursor: pointer

  .menus_item
    position: relative
    display: inline-block
    padding: 0 0 0 .7rem

    &:hover
      .menus_item_child
        display: block

      .menus-expand
        transform: rotate(180deg) !important

    .menus-expand
      padding: 4px
      transition: all .3s
      transform: rotate(0)

    & > a
      &:after
        position: absolute
        bottom: 0
        left: 0
        z-index: -1
        width: 0
        height: 3px
        background-color: lighten($theme-color, 30%)
        content: ''
        transition: all .3s ease-in-out

      &:hover
        &::after
          width: 100%

    .menus_item_child
      position: absolute
      right: 0
      display: none
      margin-top: 8px
      padding: 0
      width: max-content
      background-color: alpha($white, .8)
      box-shadow: 0 5px 20px -4px rgba(0, 0, 0, .5)
      animation: sub_menus .3s .1s ease both

      &:before
        position: absolute
        top: -8px
        left: 0
        width: 100%
        height: 20px
        content: ''

      li
        padding: 1px 10px
        list-style: none
        text-align: center

        &:hover
          background: $theme-color

        a
          color: #3b3a3a
          text-shadow: none

  #search_button
    padding: 0 0 0 .7rem

  .site-page
    position: relative
    padding-bottom: .3rem
    text-shadow: .05rem .05rem .1rem rgba(0, 0, 0, .3)
    font-size: .7rem
    cursor: pointer

@media screen and (min-width: $sm)
  #site-title
    font-size: 2rem

  #site-sub-title
    font-size: 1.2rem

@media screen and (max-width: $sm)
  #page-header
    padding: 10px .8rem

  #nav
    #site-social-icons
      display: block

    &.not_index_bg
      height: 14rem

    #page_site-info
      top: 7rem

@media screen and (max-width: $bg)
  #page-header
    &.fixed
      &.open-sidebar
        .site-page
          visibility: visible