_core.scss

// We can use relative imports for imports from the cdk because we bundle everything
// up into a single flat scss file for material.
@import '../../cdk/overlay/overlay';
@import '../../cdk/a11y/a11y';
@import '../../cdk/text-field/text-field';

// Core styles that can be used to apply material design treatments to any element.
@import 'style/elevation';
@import 'ripple/ripple';
@import 'option/option-theme';
@import 'option/optgroup-theme';
@import 'selection/pseudo-checkbox/pseudo-checkbox-theme';
@import 'typography/all-typography';

// Mixin that renders all of the core styles that are not theme-dependent.
@mixin mat-core($typography-config: null) {
  @include angular-material-typography($typography-config);
  @include mat-ripple();
  @include cdk-a11y();
  @include cdk-overlay();
  @include cdk-text-field();
}

// Mixin that renders all of the core styles that depend on the theme.
@mixin mat-core-theme($theme) {
  @include mat-ripple-theme($theme);
  @include mat-option-theme($theme);
  @include mat-optgroup-theme($theme);
  @include mat-pseudo-checkbox-theme($theme);

  // Provides external CSS classes for each elevation value. Each CSS class is formatted as
  // `mat-elevation-z$zValue` where `$zValue` corresponds to the z-space to which the element is
  // elevated.
  @for $zValue from 0 through 24 {
    .#{$_mat-elevation-prefix}#{$zValue} {
      @include _mat-theme-elevation($zValue, $theme);
    }
  }

  // Wrapper element that provides the theme background when the user's content isn't
  // inside of a `mat-sidenav-container`. Note that we need to exclude the ampersand
  // selector in case the mixin is included at the top level.
  .mat-app-background#{if(&, ', &.mat-app-background', '')} {
    $background: map-get($theme, background);
    $foreground: map-get($theme, foreground);

    background-color: mat-color($background, background);
    color: mat-color($foreground, text);
  }

  // Marker that is used to determine whether the user has added a theme to their page.
  @at-root {
    .mat-theme-loaded-marker {
      display: none;
    }
  }
}