packer-cn/website/source/assets/stylesheets/_buttons.scss

.button {
  background: $button-background;
  border: 1px solid $button-font-color;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
  color: $button-font-color;
  display: inline-block;
  font-family: $button-font-family;
  font-size: $button-font-size;
  font-weight: $button-font-weight;
  letter-spacing: 1px;
  margin-bottom: 4px;
  padding: 12px 30px 10px 30px;
  text-transform: uppercase;
  text-decoration: none;

  &:hover,
  &:active,
  &:focus {
    text-decoration: none;
  }

  &:hover {
    background: $button-font-color;
    border: 1px solid $button-font-color;
    color: $button-background;
  }

  &.primary {
    background: $button-primary-background;
    border: 1px solid darken($button-primary-background, 5%);
    color: $button-primary-font-color;

    &:hover {
      background: lighten($button-primary-background, 5%);
    }
  }
}