Practice/_src/admin/scss/components/_buttons.scss

.btn {
  display: inline-block;
  font-weight: 400;
  color: $body-color;
  text-align: center;
  vertical-align: middle;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  @include button-size( $input-btn-padding-y , $input-btn-padding-x, $input-btn-font-size, $input-btn-line-height, $input-btn-border-radius );
  @include transition();

  &:hover {
    color: $body-color;
    text-decoration: none;
  }

  &:focus,
  &.focus {
    outline: 0;
    box-shadow:none;
  }

  &.disabled,
  &:disabled {
    opacity: 0.4;
    box-shadow:none;
  }

  &:not(:disabled):not(.disabled) {
    cursor: pointer;
  }

  &:not(:disabled):not(.disabled):active,
  &:not(:disabled):not(.disabled).active {
    &:focus {

    }
  }
}

// Future-proof disabling of clicks on `<a>` elements
a.btn.disabled,
fieldset:disabled a.btn {
  pointer-events: none;
}

@each $color, $value in $theme-colors {
  .btn-#{$color} {
    @include button-variant($value, $value);
  }
}

.btn-link {
  padding:0;
}

.btn-default {
  @include button-variant(#fff, #979797);
}

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

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

.btn-sm {
  @include button-size(3px, 5px, $input-btn-font-size-sm, $input-btn-line-height-sm, $input-btn-border-radius-sm);
}

.btn-block {
  display: block;
  width: 100%;

  + .btn-block {
    margin-top: 10px;
  }
}

// Specificity overrides
input[type="submit"],
input[type="reset"],
input[type="button"] {
  &.btn-block {
    width: 100%;
  }
}

.btn-group {
  display:inline-block;
  position:relative;
}