lours.net/user/themes/le_style_de_lours_modif/scss/theme/_mixins.scss

@mixin filet{
  width: 100%;
  text-align: center;
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  width: 100%;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  &::after{
    right: 0;
    content: " ";
    width: 50%;
    height: 0px;
    border: $border-red;
    margin-left: 20px;
  }
  &::before{
    left: 0;
    content: " ";
    width: 50%;
    height: 0px;
    border: $border-red;
    margin-right: 20px;
  }
}

@mixin filet-b{
  width: 100%;
  text-align: center;
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  width: 100%;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  &::after{
    right: 0;
    content: " ";
    width: 50%;
    height: 0px;
    border: $border-blue;
    margin-left: 20px;
  }
  &::before{
    left: 0;
    content: " ";
    width: 50%;
    height: 0px;
    border: $border-blue;
    margin-right: 20px;
  }
}

@mixin triangle{
  position: absolute;
  z-index: 1;
  -webkit-transform: rotate(-135deg);
          transform: rotate(-135deg);
  width: 0;
  height: 0;
  top: -70px;
  left: -70px;
  border: 70px solid $blue;
  border-top-color: transparent;
  border-right-color: transparent;
  border-bottom-color: transparent;
}

@mixin rotateH{
  -webkit-transform: rotate(90deg);
          transform: rotate(90deg);
  position: absolute;
  top: -8px;
  left: -75px;
}

@mixin arrow{
  width: 0!important;
  height: 0;
  top: 35px;
  left: 50%;
  right: 50%;
  border: 50px solid white;
  border-left-color: transparent;
  border-right-color: transparent;
  border-bottom-color: transparent;
  position: absolute;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
}