node-add.pcss.css in Drupal 9

/**
 * Layout overrides for node add/edit form.
 */

@import "../base/variables.pcss.css";

:root {
  --node-meta-width: 22.5rem;
}

.layout-region {
  box-sizing: border-box;
}

.layout-region--node-footer .layout-region__content {
  margin-top: var(--space-l);
}

/**
 * Wide screens
 */
@media screen and (min-width: 61rem) {
  .layout-region--node-main,
  .layout-region--node-footer {
    float: left; /* LTR */
    width: calc(100% - var(--node-meta-width));
    padding-right: var(--space-l); /* LTR */
  }
  [dir="rtl"] .layout-region--node-main,
  [dir="rtl"] .layout-region--node-footer {
    float: right;
    padding-right: 0;
    padding-left: var(--space-l);
  }

  .layout-region--node-main .layout-region__content,
  .layout-region--node-footer .layout-region__content {
    max-width: 48rem;
    margin-right: auto;
    margin-left: auto;
  }

  .layout-region--node-footer .layout-region__content {
    margin-top: var(--space-xs);
  }

  .layout-region--node-secondary {
    float: right; /* LTR */
    width: var(--node-meta-width);
  }
  [dir="rtl"] .layout-region--node-secondary {
    float: left;
  }

  /* Push sidebar down to horizontal align with form section */
  .layout-region--node-secondary {
    margin-top: var(--space-l);
  }
}