Create Static Social-Media “Share” Buttons without Javascript

social.compiled.css

/* http://andidittrich.de/2015/08/create-static-social-media-share-buttons-without-javascript.html */
a.social-button {
  display: inline-block;
  width: 30px;
  height: 30px;
  border-radius: 15px;
  line-height: 30px;
  margin: 4px;
  font-size: 18px;
  font-weight: bold;
  text-align: center;
  color: #f0f0f0;
  overflow: hidden;
  padding: 0px;
}
a.social-button:hover {
  text-decoration: none;
}
a.social-button.twitter-button {
  background-color: #4099ff;
}
a.social-button.twitter-button:before {
  content: 't';
}
a.social-button.twitter-button:hover {
  background-color: #303030;
}
a.social-button.facebook-button {
  background-color: #3b5998;
}
a.social-button.facebook-button:before {
  content: 'f';
}
a.social-button.facebook-button:hover {
  background-color: #303030;
}
a.social-button.googleplus-button {
  background-color: #dd4b39;
}
a.social-button.googleplus-button:before {
  content: 'g+';
}
a.social-button.googleplus-button:hover {
  background-color: #303030;
}
a.social-button.pinterest-button {
  background-color: #c8232c;
}
a.social-button.pinterest-button:before {
  content: 'p';
}
a.social-button.pinterest-button:hover {
  background-color: #303030;
}
a.social-button.email-button {
  background-color: #35c05f;
  font-size: 10px;
}
a.social-button.email-button:before {
  content: 'mail';
}
a.social-button.email-button:hover {
  background-color: #303030;
}

social.less

/* http://andidittrich.de/2015/08/create-static-social-media-share-buttons-without-javascript.html */
// Social Network Color Codes
@twitter-color: #4099ff;
@facebook-color: #3b5998;
@google-plus-color: #dd4b39;
@pinterest-color: #c8232c;
@email-color: #35c05f;

// Generator Mixin
.button-generator(@color, @label){
    &:before{
        content: @label;
    }

    &:hover{
        background-color: #303030;
    }

    background-color: @color;
}

// The Social Button
a.social-button{
    display: inline-block;
    width: 30px;
    height: 30px;
    border-radius: 15px;
    line-height: 30px;
    margin: 4px;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    color: #f0f0f0;
    overflow: hidden;
    padding: 0px;

    &:hover{
        text-decoration: none;
    }

    // Create Button Classes using Mixin
    &.twitter-button{
        .button-generator(@twitter-color, 't');
    }
    &.facebook-button{
        .button-generator(@facebook-color, 'f');
    }
    &.googleplus-button{
        .button-generator(@google-plus-color, 'g+');
    }
    &.pinterest-button{
        .button-generator(@pinterest-color, 'p');
    }
    &.email-button{
        .button-generator(@email-color, 'mail');
        font-size: 10px;
    }
}