node_modules/@angular/material/input/_input-theme.scss

@import '../core/theming/palette';
@import '../core/theming/theming';
@import '../core/style/form-common';
@import '../core/typography/typography-utils';
@import '../core/style/vendor-prefixes';


@mixin mat-input-color($config-or-theme) {
  $config: mat-get-color-config($config-or-theme);
  $primary: map-get($config, primary);
  $accent: map-get($config, accent);
  $warn: map-get($config, warn);
  $foreground: map-get($config, foreground);

  .mat-form-field-type-mat-native-select .mat-form-field-infix::after {
    color: mat-color($foreground, secondary-text);
  }

  .mat-input-element:disabled,
  .mat-form-field-type-mat-native-select.mat-form-field-disabled .mat-form-field-infix::after {
    color: mat-color($foreground, disabled-text);
  }

  .mat-input-element {
    caret-color: mat-color($primary, text);

    @include input-placeholder {
      color: mat-private-control-placeholder-color($config);
    }

    // On dark themes we set the native `select` color to some shade of white,
    // however the color propagates to all of the `option` elements, which are
    // always on a white background inside the dropdown, causing them to blend in.
    // Since we can't change background of the dropdown, we need to explicitly
    // reset the color of the options to something dark.
    @if (map-get($config, is-dark)) {
      option {
        color: $dark-primary-text;
      }

      option:disabled {
        color: $dark-disabled-text;
      }
    }
  }

  .mat-form-field.mat-accent .mat-input-element {
    caret-color: mat-color($accent, text);
  }

  .mat-form-field.mat-warn .mat-input-element,
  .mat-form-field-invalid .mat-input-element {
    caret-color: mat-color($warn, text);
  }

  .mat-form-field-type-mat-native-select.mat-form-field-invalid .mat-form-field-infix::after {
    color: mat-color($warn, text);
  }
}

@mixin mat-input-typography($config-or-theme) {
  $config: mat-get-typography-config($config-or-theme);
  // The unit-less line-height from the font config.
  $line-height: mat-line-height($config, input);

  // The amount of space between the top of the line and the top of the actual text
  // (as a fraction of the font-size).
  $line-spacing: ($line-height - 1) / 2;

  // <input> elements seem to have their height set slightly too large on Safari causing the text to
  // be misaligned w.r.t. the placeholder. Adding this margin corrects it.
  input.mat-input-element {
    margin-top: -$line-spacing * 1em;
  }
}

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

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

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