//
// Base styles
//

.btn {
  display: inline-block;
  font-family: $btn-font-family;
  font-weight: $btn-font-weight;
  line-height: $btn-line-height;
  color: var(--#{$variable-prefix}btn-color, $body-color);
  text-align: center;
  text-decoration: if($link-decoration == none, null, none);
  white-space: $btn-white-space;
  vertical-align: middle;
  cursor: if($enable-button-pointers, pointer, null);
  user-select: none;
  @include gradient-bg(var(--#{$variable-prefix}btn-bg, transparent));
  border: $btn-border-width solid var(--#{$variable-prefix}btn-border-color, transparent);
  @include box-shadow(var(--#{$variable-prefix}btn-box-shadow, $btn-box-shadow));
  @include button-size($btn-padding-y, $btn-padding-x, $btn-font-size, $btn-border-radius);
  @include transition($btn-transition);
  @include elevation(1, ("[class*='link']", "[class*='outline']", "[class*='ghost']", "[class*='transparent']", "[class*='close']"));

  &:hover {
    color: var(--#{$variable-prefix}btn-hover-color, $body-color);
    @include gradient-bg(var(--#{$variable-prefix}btn-hover-bg));
    text-decoration: if($link-hover-decoration == underline, none, null);
    border-color: var(--#{$variable-prefix}btn-hover-border-color, transparent);
    @include elevation(2, ("[class*='link']", "[class*='outline']", "[class*='ghost']", "[class*='transparent']", "[class*='close']"));
  }

  .btn-check:focus + &,
  &:focus {
    color: var(--#{$variable-prefix}btn-hover-color);
    @include gradient-bg(var(--#{$variable-prefix}btn-hover-bg));
    border-color: var(--#{$variable-prefix}btn-hover-border-color, transparent);
    outline: 0;
    @if $enable-shadows {
      @include box-shadow($btn-box-shadow, 0 0 0 $btn-focus-width var(--#{$variable-prefix}btn-shadow));
    } @else {
      // Avoid using mixin so we can pass custom focus shadow properly
      box-shadow: 0 0 0 $btn-focus-width var(--#{$variable-prefix}btn-shadow);
    }
  }

  .btn-check:checked + &,
  .btn-check:active + &,
  &:active,
  &.active,
  .show > &.dropdown-toggle {
    color: var(--#{$variable-prefix}btn-active-color);
    background-color: var(--#{$variable-prefix}btn-active-bg);
    // Remove CSS gradients if they're enabled
    background-image: if($enable-gradients, none, null);
    border-color: var(--#{$variable-prefix}btn-active-border-color, transparent);
    @include box-shadow($btn-active-box-shadow);

    &:focus {
      @if $enable-shadows {
        @include box-shadow($btn-active-box-shadow, 0 0 0 $btn-focus-width var(--#{$variable-prefix}btn-shadow));
      } @else {
        // Avoid using mixin so we can pass custom focus shadow properly
        box-shadow: 0 0 0 $btn-focus-width var(--#{$variable-prefix}btn-shadow);
      }
    }
  }

  &:disabled,
  &.disabled,
  fieldset:disabled & {
    color: var(--#{$variable-prefix}btn-disabled-color);
    pointer-events: none;
    background-color: var(--#{$variable-prefix}btn-disabled-bg);
    // Remove CSS gradients if they're enabled
    background-image: if($enable-gradients, none, null);
    border-color: var(--#{$variable-prefix}btn-disabled-border-color, transparent);
    opacity: $btn-disabled-opacity;
    @include box-shadow(none);
  }
}


//
// Alternate buttons
//
// scss-docs-start btn-variant-loops
// scss-docs-start button-modifiers
@each $state, $variant in $button-variants {
  @include button-variant($state, $variant);
}
// scss-docs-end button-modifiers

// scss-docs-start button-outline-modifiers
@each $state, $variant in $button-outline-ghost-variants {
  @include button-outline-variant($state, $variant);
}
// scss-docs-end button-outline-modifiers

// scss-docs-start button-ghost-modifiers
@each $state, $variant in $button-outline-ghost-variants {
  @include button-ghost-variant($state, $variant);
}
// scss-docs-end button-ghost-modifiers
// scss-docs-end btn-variant-loops


//
// Link buttons
//

// Make a button look and behave like a link
.btn-link {
  font-weight: $font-weight-normal;
  color: var(--#{$variable-prefix}btn-link-color, $btn-link-color);
  text-decoration: $link-decoration;

  &:hover {
    color: var(--#{$variable-prefix}btn-link-hover-color, $btn-link-hover-color);
    text-decoration: $link-hover-decoration;
  }

  &:focus {
    text-decoration: $link-hover-decoration;
  }

  &:disabled,
  &.disabled {
    color: var(--#{$variable-prefix}btn-link-disabled-color, $btn-link-disabled-color);
  }

  // No need for an active state here
}


//
// Button Sizes
//

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

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