node_modules/@covalent/core/layout/_layout-theme.scss

@import '../common/styles/elevation';
@import '../common/styles/theme-functions';
@import '../common/styles/typography-functions';

@mixin td-layout-typography($config) {
  td-navigation-drawer {
    .td-navigation-drawer-title {
      font: {
        family: td-font-family($config);
        size: td-font-size($config, subheading-2);
      }
    }
    .td-navigation-drawer-name {
      font: {
        family: td-font-family($config);
        size: td-font-size($config, body-1);
        weight: 500;
      }

      line-height: td-line-height($config, body-1);
    }
    .td-navigation-drawer-menu-toggle {
      font: {
        family: td-font-family($config);
        size: td-font-size($config, body-2);
        weight: 400;
      }

      line-height: td-line-height($config, body-2);
    }
  }
}

@mixin td-layout-theme($theme) {
  $primary: map-get($theme, primary);
  $accent: map-get($theme, accent);
  $warn: map-get($theme, warn);
  $background: map-get($theme, background);
  $foreground: map-get($theme, foreground);

  .mat-drawer-container {
    background-color: mat-color($background, status-bar);
  }

  [mat-icon-button].td-layout-menu-button {
    margin-left: 0;
    ::ng-deep [dir='rtl'] & {
      margin-right: 0;
      margin-left: 6px;
    }
  }

  td-layout-nav,
  td-layout-nav-list,
  td-layout-manage-list,
  td-layout-card-over,
  td-navigation-drawer,
  td-layout {
    mat-toolbar {
      @include mat-elevation(1);

      z-index: 1;
    }
  }

  body[dense] td-layout-nav,
  body[dense] td-layout-nav-list,
  body[dense] td-layout-card-over,
  td-layout-nav[dense],
  td-layout-nav-list[dense],
  td-layout-card-over[dense] {
    mat-toolbar.td-layout-toolbar {
      &.mat-toolbar-row,
      &.mat-toolbar-single-row {
        height: 48px;
      }
    }
  }
  body[dense] td-layout-card-over,
  td-layout-card-over[dense] {
    .td-layout-card-over-wrapper {
      margin: -48px;
      margin-left: 0;
      margin-right: 0;
    }
  }
  .mat-drawer-side.td-layout-sidenav {
    @include mat-elevation(2);
  }
  .td-layout-footer {
    background: mat-color($background, app-bar);
    color: mat-color($foreground, text);
    @include mat-elevation(2);
    &.mat-primary {
      background: mat-color($primary);
      &,
      mat-icon {
        color: mat-color($primary, default-contrast);
      }
    }
    &.mat-accent {
      background: mat-color($accent);
      &,
      mat-icon {
        color: mat-color($accent, default-contrast);
      }
    }
    &.mat-warn {
      background: mat-color($warn);
      &,
      mat-icon {
        color: mat-color($warn, default-contrast);
      }
    }
  }
}