.c-header {
  @include z(z-header);
  position: relative;
  padding: 50px 0;
}

.c-header__main {
  position: relative;
  @include flex(space-between center);
  @include contain;

  @include mq(900, 1300) {
    padding-top: 30px;
  }
}

.c-header__logo {
  @include flex(center center);
  width: 240px;
  z-index: 5;
}

.c-header__nav {
  display: none;
  flex: 1;
}

.c-header__overlay-button {
  padding: 10px;
  appearance: none;
  background-color: transparent;
  border: none;
  cursor: pointer;

  > * {
    width: 25px;
    height: 3px;
    display: block;
    transform: scale3d(1, 1, 1);
    transform-origin: 0 50%;
    background-color: white;
    transition: transform 0.6s;

    &:nth-of-type(2) {
      transform: scale3d(0.8, 1, 1);
    }

    &:nth-of-type(3) {
      transform: scale3d(0.45, 1, 1);
    }
  }

  > * + * {
   margin-top: 3px;
  }

  &:hover {
    > * {
      transform: scale3d(1, 1, 1) !important;
    }
  }
}

.technical-fiche-materials {
  position: absolute;
  top: -50px;
  left: 0;

  &:before {
    content: '';
    display: block;
    width: 160%;
    height: 300%;
    position: absolute;
    z-index: 0;
    top: 0;
    left: 0;
    background: -moz-linear-gradient(-35deg,  rgba(0,0,19,0) 25%, rgba(0,0,19,1) 70%); /* FF3.6-15 */
    background: -webkit-linear-gradient(-35deg,  rgba(0,0,19,0) 25%,rgba(0,0,19,1) 70%); /* Chrome10-25,Safari5.1-6 */
    background: linear-gradient(-35deg,  rgba(0,0,19,0) 25%,rgba(0,0,19,1) 70%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00000013', endColorstr='#000013',GradientType=1 ); /* IE6-9 fallback on horizontal gradient */
  }

  .c-nav__link {
    padding: 7px 20px 7px 10px;
    color: palette(dark);
    background-color: palette(action);
    z-index: 10;

    &::before {
      content: none;
    }

    &:after {
      content: "";
      position: absolute;
      bottom: -1px;
      right: -1px;
      border-width: 16px 16px 0 0;
      border-style: solid;
      border-color: transparent palette(dark);
    }

    &:hover {
      color: palette(dark);
      background-color: scale-color(palette(action), $lightness: -20%);
    }
  }
}


/**
 * -----------------------------------------------------------------------------
 * Large viewport gets a stacked navigation that toggles with a hamburger button
 * -----------------------------------------------------------------------------
 */

@include mq($overlay-menu) {
  .c-header__logo {
    flex: 0 0 240px;
  }
  .c-header__nav {
    display: block;
  }
  .c-header__overlay-button {
    display: none
  }
}