fab-manager/app/assets/stylesheets/app.buttons.scss

.btn-default:hover, .btn-default:focus, .btn-default:active, .btn-default.active, .open > .btn-default.dropdown-toggle {
  background-color: #f2f2f2;
}

.btn {
  > i {
    &.pull-left,
    &.pull-right {
      line-height: 1.428571429;
    }
  }
}

.btn-warning-full {
  outline: 0;
  text-transform: uppercase;

  //border: 3px solid $yellow;
  //background-color: $yellow;
  &:hover {
    background-color: white;
  }
}

.btn-facebook {
  border: 1px solid #8b9dc3;
  background-color: #3b5998;
  color: white;

  &:hover {
    border: 1px solid #7d8fb4;
    background-color: #394c89;
    color: white;
  }
}

.btn-twitter {
  border: 1px solid #ccd6dd;
  background-color: #55acee;
  color: white;

  &:hover {
    border: 1px solid #bdc7ce;
    background-color: #539fdf;
    color: white;
  }
}

.btn-block {
  padding-left: 12px;
  padding-right: 12px;
}

.btn-group-vertical > .btn:first-child:not(:last-child) {
  border-top-right-radius: $border-radius-base;
}

.btn-group-vertical > .btn:last-child:not(:first-child) {
  border-bottom-left-radius: $border-radius-base;
}

.btn-inactive {
  -webkit-box-shadow: none !important;
  box-shadow: none !important;
}

.btn-loading:after {
  margin-left: 1em;
  display: inline-block;
  content: "\f110";
  font-family: FontAwesome;
  -webkit-animation: spin 4s linear infinite;
  -moz-animation: spin 4s linear infinite;
  animation: spin 4s linear infinite;
}

.btn-no-overflow {
  display: block;
  width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

@-moz-keyframes spin {
  100% {
    -moz-transform: rotate(360deg);
  }
}

@-webkit-keyframes spin {
  100% {
    -webkit-transform: rotate(360deg);
  }
}

@keyframes spin {
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}