_btn.scss

/*
 * Live at codepen - https://codepen.io/ammit/pen/rweVZG
 */
@mixin btn($bg: #ccc, $border-radius: 0, $pad: 16px, $danger: #f44336) {
  display: inline-block;
  vertical-align: middle;
  user-select: none;  
  font-family: inherit;
  outline: 0;
  border: 1px solid darken($bg, 10%);
  border-radius: $border-radius;
  color: white;
  background: $bg;
  white-space: nowrap;
  padding: $pad/1.5 $pad;
  line-height: 1;
  position: relative;
  text-transform: uppercase;
  text-decoration: none;
  font-weight: regular;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-align: center;

  &:not(.btn-disabled){
    &:hover,
    &:focus {
      outline: 0;
      background: lighten($bg, 5%);
    }
    
    &.active,
    &:active {
      background-image: none;
    }
  }
  
  &-w-icon {
    padding-left: $pad+$pad/1.5+16px !important;
    position: relative;
  }
  
  &-danger {
    background: lighten($danger, 5%);
    border-color: $danger;
    
    &:not(.btn-disabled){
      &:hover,
      &:active {
        background: lighten($danger, 10%);
      }
    }
  }
  
  &-disabled {
    &,
    &:hover,
    &:active {
      opacity: 0.5;
      pointer-events: none;
    }
  }
  
  
  &-full {
    width: 100%;
    max-width: 100%;
  }
  
  svg {
    position: absolute;
    width: 20px;
    height: 20px;
    left: $pad;
    top: 50%;
    transform: translateY(-50%);
    fill: $bg;
    transition: fill 0.3s ease;
    path {
      fill: #fff;
    }
  }
}