.global-header {
  background-color: #fff;
}

.global-header__main {
  border-bottom: 1px #b8b9bb solid;
}

.global-header__main-content {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  padding: 35px 25px;
}

.global-header__logo {
  display: inline-block;
  vertical-align: middle;
  position: relative;
  margin: 0;
  margin-right: 55px;
  width: 145px;
  height: 25px;
  text-indent: -9999px;
  color: transparent;
}

.global-header__logo a, .global-header__logo a:visited {
  display: block;
  height: 100%;
  background: url(../img/postnauka-text-logo.svg) no-repeat 0 0 transparent;
  background-size: cover;
}

.global-header__expand-special {
  display: none;
  position: absolute;
  left: 160px;
  width: 16px;
  height: 16px;
  top: 50%;
  margin-top: -8px;
  background: url(../img/icon-right.svg) no-repeat 0 0 transparent;
  background-size: cover;
  -webkit-transform: rotate(90deg);
      -ms-transform: rotate(90deg);
          transform: rotate(90deg);
  cursor: pointer;
  -webkit-transition: .2s all;
          transition: .2s all;
}

.global-header__expand-special_opened {
  -webkit-transform: rotate(0);
      -ms-transform: rotate(0);
          transform: rotate(0);
}

.global-header__special-menu {
  padding: 0;
  margin: 0;
  display: inline-block;
  vertical-align: middle;
}

.global-header__special-menu_mobile {
  display: inline-block;
}

.global-header__special-menu li {
  font-size: 18px;
  color: #333;
  font-family: "Roboto", Helvetica, Arial, sans-serif;
  display: inline-block;
  vertical-align: middle;
  margin-right: 55px;
}

.global-header__special-menu li:last-child {
  margin-right: 0;
}

.global-header__special-menu li a, .global-header__special-menu li a:visited {
  color: inherit;
  text-decoration: none;
  -webkit-transition: .2s all;
          transition: .2s all;
}

.global-header__special-menu li a:hover, .global-header__special-menu li a:visited:hover {
  color: #ff3f00;
  -webkit-transition: 0s all;
          transition: 0s all;
}

.global-header__search {
  position: absolute;
  top: 35px;
  left: 180px;
  right: 60px;
  height: 0;
}

.global-header__search input[type="text"] {
  position: absolute;
  left: 0;
  top: -17px;
  width: 100%;
  height: 60px;
  line-height: 60px;
  padding: 0 40px 0 20px;
  border: 1px #ddd solid;
  box-sizing: border-box;
  background-color: #fff;
  font-family: "Roboto", Helvetica, Arial, sans-serif;
  font-size: 16px;
  -webkit-transition: .2s all;
          transition: .2s all;
  outline: none;
  opacity: 0;
  visibility: hidden;
  -webkit-transform: translateY(-15px);
      -ms-transform: translateY(-15px);
          transform: translateY(-15px);
  border-radius: 0;
  box-shadow: none;
}

.global-header__search button {
  position: absolute;
  right: 10px;
  top: 0;
  border: none;
  width: 26px;
  height: 26px;
  background: url(../img/icon-search.svg) no-repeat 0 0 transparent;
  background-size: 26px 26px;
  cursor: pointer;
  outline: none;
}

.global-header__search button::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: url(../img/icon-search.svg) no-repeat 0 0 transparent;
  background-size: 26px 26px;
  opacity: 0;
  -webkit-transition: .2s all;
          transition: .2s all;
}

.global-header__search_expanded input[type="text"] {
  opacity: 1;
  visibility: visible;
  -webkit-transform: translateY(0);
      -ms-transform: translateY(0);
          transform: translateY(0);
}

.global-header__search_expanded button::before {
  opacity: 1;
}

.global-header__profile {
  position: absolute;
  width: 27px;
  height: 27px;
  right: 25px;
  top: 34px;
  background: url(../img/icon-profile.svg) no-repeat 0 0 transparent;
  background-size: 26px 26px;
}

.global-header__secondary-content {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  padding: 25px 25px;
}

.global-header__main-menu {
  list-style-type: none;
  padding: 0;
  margin: 0;
  position: relative;
  padding-left: 205px;
  font-family: "Open Sans", Helvetica, Arial, sans-serif;
}

.global-header__main-menu li {
  display: inline-block;
  vertical-align: middle;
  margin-right: 30px;
}

.global-header__main-menu li:last-child {
  margin-right: 0;
}

.global-header__main-menu li.main-menu__topics-trigger {
  position: absolute;
  left: 0;
  top: 50%;
  height: 14px;
  line-height: 14px;
  font-weight: 700;
  font-size: 14px;
  margin-top: -7px;
  color: #000;
  font-family: "Open Sans", Helvetica, Arial, sans-serif;
  margin-right: 0;
  cursor: pointer;
}

.global-header__main-menu li.main-menu__topics-trigger span {
  padding-left: 35px;
  position: relative;
  text-transform: uppercase;
}

.global-header__main-menu li.main-menu__topics-trigger span::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  margin-top: -7px;
  width: 20px;
  height: 14px;
  background: url(../img/icon-burger.png) no-repeat 0 0 transparent;
  background-size: cover;
}

.global-header__main-menu li a, .global-header__main-menu li a:visited {
  font-weight: 700;
  font-size: 14px;
  color: #e96438;
  text-decoration: none;
}

.global-header__main-menu li a:hover, .global-header__main-menu li a:visited:hover {
  color: #ff3f00;
}

.global-header__main-menu .main-menu__topics {
  position: fixed;
  text-align: left;
  left: 0;
  top: 0;
  height: 100%;
  width: 280px;
  background-color: #2a2d32;
  z-index: 1000;
  -webkit-transition: .2s all;
          transition: .2s all;
  -webkit-transform: translateX(-100%);
      -ms-transform: translateX(-100%);
          transform: translateX(-100%);
  opacity: 0;
  visibility: hidden;
  padding: 100px 40px 40px;
  box-sizing: border-box;
  overflow: auto;
  cursor: default;
}

.global-header__main-menu .main-menu__topics::before {
  content: '';
  position: absolute;
  top: 30px;
  left: 40px;
  width: 45px;
  height: 45px;
  background: url(../img/postnauka-logo_grey.svg) no-repeat 0 0 transparent;
  background-size: contain;
}

.global-header__main-menu .main-menu__topics_expanded {
  -webkit-transform: translateX(0);
      -ms-transform: translateX(0);
          transform: translateX(0);
  opacity: 1;
  visibility: visible;
}

.global-header__main-menu .main-menu__topics li {
  display: block;
  font-size: 12px;
  font-weight: 400;
  font-family: "Open Sans", Helvetica, Arial, sans-serif;
  color: #fff;
  padding: 15px 0;
  text-transform: uppercase;
  white-space: nowrap;
  letter-spacing: .05em;
  border: none;
}

.global-header__main-menu .main-menu__topics li.main-menu__categories-trigger {
  display: none;
}

.global-header__main-menu .main-menu__topics li.main-menu__categories-trigger + li {
  border-top: 1px #3b3d42 solid;
  padding: 25px 0 15px;
}

.global-header__main-menu .main-menu__topics li.main-menu__close {
  position: absolute;
  width: 24px;
  height: 24px;
  right: 30px;
  top: 30px;
  padding: 0;
  background: transparent;
  cursor: pointer;
}

.global-header__main-menu .main-menu__topics li.main-menu__close span {
  display: block;
  height: 100%;
  padding: 0;
  background: url(../img/icon-close.svg) no-repeat 0 0 transparent;
  background-size: cover;
}

.global-header__main-menu .main-menu__topics li.main-menu__close span:hover::before {
  opacity: 1;
  -webkit-transition: 0s all;
          transition: 0s all;
}

.global-header__main-menu .main-menu__topics li.main-menu__close span::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  background: url(../img/icon-close_orange.svg) no-repeat 0 0 transparent;
  background-size: cover;
  opacity: 0;
  -webkit-transition: .2s all;
          transition: .2s all;
}

.global-header__main-menu .main-menu__topics li.last {
  padding-bottom: 25px;
  border-bottom: 1px #3b3d42 solid;
}

.global-header__main-menu .main-menu__topics li a, .global-header__main-menu .main-menu__topics li a:visited {
  color: inherit;
  font-weight: 400;
  font-size: 12px;
}

.global-header__main-menu .main-menu__topics li a:hover, .global-header__main-menu .main-menu__topics li a:visited:hover {
  border: none;
  color: #ff3f00;
}

.global-header__donate-link, .global-header__donate-link:visited {
  position: absolute;
  font-size: 14px;
  font-family: "Open Sans", Helvetica, Arial, sans-serif;
  height: 14px;
  line-height: 14px;
  top: 50%;
  margin-top: -7px;
  right: 25px;
  font-weight: 700;
  color: #3b404f;
  text-decoration: none;
  padding-left: 25px;
}

.global-header__donate-link:before, .global-header__donate-link:visited:before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  margin-top: -10px;
  width: 20px;
  height: 20px;
  background: url(../img/icon-donate.svg) no-repeat 0 0 transparent;
  background-size: 20px 20px;
}

.global-header_dark {
  background-color: rgba(67, 70, 76, 0.5);
}

.global-header_dark .global-header__main {
  border-bottom: none;
}

.global-header_dark .global-header__search button {
  background: url(../img/icon-search_white.svg) no-repeat 0 0 transparent;
  background-size: 26px 26px;
}

.global-header_dark .global-header__special-menu li {
  color: #fff;
}

.global-header_dark .global-header__profile {
  background: url(../img/icon-profile_white.svg) no-repeat 0 0 transparent;
  background-size: 26px 26px;
}

.global-header_dark .global-header__logo {
  background: url(../img/postnauka-text-logo_white.svg) no-repeat 0 0 transparent;
  background-size: 26px 26px;
}

@media screen and (max-width: 840px){
  .global-header__expand-special{
    display: block;
  }
  .global-header__special-menu{
    display: none;
    margin: 30px 0 0;
  }
  .global-header__special-menu_mobile{
    display: block;
  }
  .global-header__special-menu li{
    display: block;
    margin-bottom: 20px;
  }
}

@media screen and (max-width: 640px){
  .global-header__search{
    left: 25px;
  }
}

@media screen and (max-width: 1023px){
  .global-header .mobile-menu-switcher{
    position: absolute;
    left: 0;
    top: 50%;
    margin-top: -7px;
    width: 20px;
    height: 14px;
    background: url(../img/icon-burger.png) no-repeat 0 0 transparent;
    background-size: cover;
    left: 25px;
    cursor: pointer;
  }
  .global-header__main-menu{
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    height: 100%;
    box-sizing: border-box;
    background-color: #000;
    height: 100%;
    overflow: auto;
    z-index: 800;
    -webkit-transform: translateX(-100%);
    -ms-transform: translateX(-100%);
    transform: translateX(-100%);
    opacity: 0;
    -webkit-transition: 0.2s opacity, 0.2s -webkit-transform;
    transition: 0.2s opacity, 0.2s transform;
    padding-left: 0;
    background-color: #2a2d32;
    padding: 100px 40px 40px;
    cursor: default;
  }
  .global-header__main-menu::before{
    content: '';
    position: absolute;
    top: 30px;
    left: 40px;
    width: 45px;
    height: 45px;
    background: url(../img/postnauka-logo_grey.svg) no-repeat 0 0 transparent;
    background-size: contain;
  }
  .global-header__main-menu_expanded{
    opacity: 1;
    -webkit-transform: translateX(0);
    -ms-transform: translateX(0);
    transform: translateX(0);
  }
  .global-header__main-menu li{
    display: block;
    font-size: 12px;
    font-weight: 400;
    font-family: "Open Sans", Helvetica, Arial, sans-serif;
    color: #fff;
    padding: 15px 0;
    text-transform: uppercase;
    white-space: nowrap;
    border-top: 1px #3b3d42 solid;
    margin-right: 0;
  }
  .global-header__main-menu li.main-menu__topics-trigger{
    position: relative;
    left: auto;
    top: auto;
    height: auto;
    line-height: normal;
    font-weight: 700;
    font-size: 12px;
    margin: 0;
    font-family: "Open Sans", Helvetica, Arial, sans-serif;
    margin-right: 0;
    cursor: pointer;
  }
  .global-header__main-menu li.main-menu__topics-trigger span{
    position: relative;
    display: block;
    text-transform: uppercase;
    padding-left: 0;
    font-weight: 400;
    color: #e96539;
  }
  .global-header__main-menu li.main-menu__topics-trigger span::before{
    display: none;
  }
  .global-header__main-menu li.main-menu__topics-trigger span::after{
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    margin-top: -10px;
    width: 20px;
    height: 20px;
    background: url(../img/icon-right_orange.svg) no-repeat 0 0 transparent;
    background-size: cover;
  }
  .global-header__main-menu li.main-menu__close{
    position: absolute;
    width: 24px;
    height: 24px;
    right: 30px;
    top: 30px;
    padding: 0;
    background: transparent;
    cursor: pointer;
    border: none;
  }
  .global-header__main-menu li.main-menu__close span{
    display: block;
    height: 100%;
    padding: 0;
    background: url(../img/icon-close.svg) no-repeat 0 0 transparent;
    background-size: cover;
  }
  .global-header__main-menu li.main-menu__close span:hover::before{
    opacity: 1;
    -webkit-transition: 0s all;
    transition: 0s all;
  }
  .global-header__main-menu li.main-menu__close span::before{
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    background: url(../img/icon-close_orange.svg) no-repeat 0 0 transparent;
    background-size: cover;
    opacity: 0;
    -webkit-transition: .2s all;
    transition: .2s all;
  }
  .global-header__main-menu li.main-menu__close span::after{
    display: none;
  }
  .global-header__main-menu li.last{
    border-bottom: 1px #3b3d42 solid;
  }
  .global-header__main-menu li a, .global-header__main-menu li a:visited{
    color: inherit;
    font-weight: 400;
    font-size: 12px;
  }
  .global-header__main-menu li a:hover, .global-header__main-menu li a:visited:hover{
    border: none;
    color: #ff3f00;
  }
  .global-header__main-menu .main-menu__topics li.main-menu__categories-trigger{
    display: block;
    border-top: 1px #3b3d42 solid;
  }
  .global-header__main-menu .main-menu__topics li.main-menu__categories-trigger span{
    padding-left: 30px;
    display: block;
    cursor: pointer;
  }
  .global-header__main-menu .main-menu__topics li.main-menu__categories-trigger span::after{
    content: '';
    left: -5px;
    top: 50%;
    margin-top: -10px;
    width: 20px;
    height: 20px;
    background: url(../img/icon-right_orange.svg) no-repeat 0 0 transparent;
    background-size: cover;
    -webkit-transform: rotate(180deg);
    -ms-transform: rotate(180deg);
    transform: rotate(180deg);
  }
}