admin/React_Starter/scss/core/_buttons.scss

button {
  cursor: pointer;
}

.btn-transparent {
  color: #fff;
  background-color: transparent;
  border-color: transparent;
}

.btn {
  [class^="icon-"], [class*=" icon-"] {
    display: inline-block;
    margin-top: -2px;
    vertical-align: middle;
  }
}

.btn-facebook,
.btn-twitter,
.btn-linkedin,
.btn-flickr,
.btn-tumblr,
.btn-xing,
.btn-github,
.btn-html5,
.btn-openid,
.btn-stack-overflow,
.btn-youtube,
.btn-css3,
.btn-dribbble,
.btn-google-plus,
.btn-instagram,
.btn-pinterest,
.btn-vk,
.btn-yahoo,
.btn-behance,
.btn-dropbox,
.btn-reddit,
.btn-spotify,
.btn-vine,
.btn-foursquare,
.btn-vimeo {
  position: relative;
  overflow: hidden;
  color: #fff !important;
  text-align: center;

  &::before {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    font-family: "FontAwesome";
    font-style: normal;
    font-weight: normal;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
  }

  &:hover {
    color: #fff;
  }

  &.icon {

    span {
      display: none;
    }
  }

  &.text {
    &::before {
      display: none;
    }

    span {
      margin-left: 0 !important;
    }
  }
  @include button-social-size($input-btn-padding-y, $input-btn-padding-x, $font-size-base, $line-height-base, $btn-border-radius);

  &.btn-lg {
    @include button-social-size($input-btn-padding-y-lg, $input-btn-padding-x-lg, $font-size-lg, $line-height-lg, $btn-border-radius-lg);
  }

  &.btn-sm {
    @include button-social-size($input-btn-padding-y-sm, $input-btn-padding-x-sm, $font-size-sm, $line-height-sm, $btn-border-radius-sm);
  }

}

.btn-facebook {
  $color: $facebook;

  background: $color;
  &::before {
    content: "\f09a";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-twitter {
  $color: $twitter;

  background: $color;
  &::before {
    content: "\f099";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-linkedin {
  $color: $linkedin;

  background: $color;
  &::before {
    content: "\f0e1";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-flickr {
  $color: $flickr;

  background: $color;
  &::before {
    content: "\f16e";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-tumblr {
  $color: $tumblr;

  background: $color;
  &::before {
    content: "\f173";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-xing {
  $color: $xing;

  background: $color;
  &::before {
    content: "\f168";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-github {
  $color: $github;

  background: $color;
  &::before {
    content: "\f09b";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-html5 {
  $color: $html5;

  background: $color;
  &::before {
    content: "\f13b";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-openid {
  $color: $openid;

  background: $color;
  &::before {
    content: "\f19b";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-stack-overflow {
  $color: $stack-overflow;

  background: $color;
  &::before {
    content: "\f16c";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-css3 {
  $color: $css3;

  background: $color;
  &::before {
    content: "\f13c";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-youtube {
  $color: $youtube;

  background: $color;
  &::before {
    content: "\f167";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-dribbble {
  $color: $dribbble;

  background: $color;
  &::before {
    content: "\f17d";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-google-plus {
  $color: $google-plus;

  background: $color;
  &::before {
    content: "\f0d5";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-instagram {
  $color: $instagram;

  background: $color;
  &::before {
    content: "\f16d";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-pinterest {
  $color: $pinterest;

  background: $color;
  &::before {
    content: "\f0d2";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-vk {
  $color: $vk;

  background: $color;
  &::before {
    content: "\f189";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-yahoo {
  $color: $yahoo;

  background: $color;
  &::before {
    content: "\f19e";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-behance {
  $color: $behance;

  background: $color;
  &::before {
    content: "\f1b4";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-dropbox {
  $color: $dropbox;

  background: $color;
  &::before {
    content: "\f16b";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-reddit {
  $color: $reddit;

  background: $color;
  &::before {
    content: "\f1a1";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-spotify {
  $color: $spotify;

  background: $color;
  &::before {
    content: "\f1bc";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-vine {
  $color: $vine;

  background: $color;
  &::before {
    content: "\f1ca";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-foursquare {
  $color: $foursquare;

  background: $color;
  &::before {
    content: "\f180";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}

.btn-vimeo {
  $color: $vimeo;

  background: $color;
  &::before {
    content: "\f194";
    background: darken($color, 5%);

  }

  &:hover {
    background: darken($color, 5%);

    &::before {
      background: darken($color, 10%);
    }
  }
}