node_modules/@covalent/core/steps/_steps-theme.scss

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

@mixin td-steps-typography($config) {
  .td-step-label {
    font: {
      family: td-font-family($config);
      size: td-font-size($config, body-2);
      weight: td-font-weight($config, body-2);
    }
  }
  .td-step-sublabel {
    font: {
      family: td-font-family($config);
      size: td-font-size($config, body-1);
    }

    line-height: td-line-height($config, body-1);
  }
}

@mixin td-steps-theme($theme) {
  $accent: map-get($theme, accent);
  $warn: map-get($theme, warn);
  $foreground: map-get($theme, foreground);
  $background: map-get($theme, background);
  .td-steps {
    .td-step-content,
    .td-step-summary,
    .td-step-actions {
      margin: $margin;
    }
    // steps
    .td-horizontal-line {
      border-bottom-color: mat-color($foreground, divider);
    }
    .td-vertical-line {
      border-left-color: mat-color($foreground, divider);
    }
    // header
    .td-step-link {
      &:focus:not(.mat-disabled),
      &:hover:not(.mat-disabled) {
        .td-step-header {
          background: mat-color($background, 'hover');
        }
      }
    }
    .td-step-header {
      &.mat-disabled {
        cursor: default;
      }
      &:focus:not(.mat-disabled),
      &:hover:not(.mat-disabled) {
        background: mat-color($background, 'hover');
      }
      .td-step-label-wrapper {
        .td-step-label {
          color: mat-color($foreground, text);
        }
        .td-step-sublabel {
          color: mat-color($foreground, secondary-text);
        }
        &.mat-inactive {
          &,
          & * {
            color: mat-color($foreground, disabled);
          }
        }
        &.mat-warn {
          &,
          & * {
            color: mat-color($warn);
          }
        }
      }
      .mat-complete {
        color: mat-color($accent);
      }
    }
    .td-circle {
      color: mat-color($background, card);
      &.mat-active {
        background-color: mat-color($accent);
      }
      &.mat-inactive {
        background-color: mat-color($foreground, disabled);
      }
      & mat-icon {
        fill: mat-color($foreground, text);
      }
    }
    .td-triangle {
      color: mat-color($warn);
    }
    .td-edit-icon {
      color: mat-color($foreground, icon);
    }

    .td-step-header-pagination-chevron {
      border-color: mat-color($foreground, text);
    }
    .td-step-header-pagination-disabled .td-step-header-pagination-chevron {
      border-color: mat-color($foreground, disabled-text);
    }
  }
}