node_modules/@angular/material/card/_card-theme.scss

@import '../core/theming/palette';
@import '../core/theming/theming';
@import '../core/style/private';
@import '../core/typography/typography-utils';


@mixin mat-card-color($config-or-theme) {
  $config: mat-get-color-config($config-or-theme);
  $background: map-get($config, background);
  $foreground: map-get($config, foreground);

  .mat-card {
    @include mat-private-theme-overridable-elevation(1, $config);
    background: mat-color($background, card);
    color: mat-color($foreground, text);

    // Needs extra specificity to be able to override the elevation selectors.
    &.mat-card-flat {
      @include mat-private-theme-overridable-elevation(0, $config);
    }
  }

  .mat-card-subtitle {
    color: mat-color($foreground, secondary-text);
  }
}

@mixin mat-card-typography($config-or-theme) {
  $config: mat-get-typography-config($config-or-theme);
  .mat-card {
    font-family: mat-font-family($config);
  }

  .mat-card-title {
    font: {
      size: mat-font-size($config, headline);
      weight: mat-font-weight($config, title);
    }
  }

  .mat-card-header .mat-card-title {
    font-size: mat-font-size($config, title);
  }

  .mat-card-subtitle,
  .mat-card-content {
    font-size: mat-font-size($config, body-1);
  }
}

@mixin _mat-card-density($config-or-theme) {}

@mixin mat-card-theme($theme-or-color-config) {
  $theme: mat-private-legacy-get-theme($theme-or-color-config);
  @include mat-private-check-duplicate-theme-styles($theme, 'mat-card') {
    $color: mat-get-color-config($theme);
    $density: mat-get-density-config($theme);
    $typography: mat-get-typography-config($theme);

    @if $color != null {
      @include mat-card-color($color);
    }
    @if $density != null {
      @include _mat-card-density($density);
    }
    @if $typography != null {
      @include mat-card-typography($typography);
    }
  }
}