src/theme/DocPage/Layout/Main/styles.module.css

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

.docMainContainer {
  display: flex;
  width: 100%;
}

@media (min-width: 997px) {
  .docMainContainer {
    flex-grow: 1;
    max-width: calc(100% - var(--doc-sidebar-width));
  }

  .docMainContainerEnhanced {
    max-width: calc(100% - var(--doc-sidebar-hidden-width));
  }

  .docItemWrapperEnhanced {
    max-width: calc(
      var(--ifm-container-width) + var(--doc-sidebar-width)
    ) !important;
  }
}