src/themes/shared/_mq.css

/* Media */
/* ========================================================================== */
:root {
  --_mobile-breakpoint: 640px; /* JS Accessible. Match with MQ below. */
}

@media (prefers-reduced-motion) {
  :root {
    --duration-slow: 0s;
    --duration-medium: 0s;
    --duration-fast: 0s;
  }
}

@media print {
  .app-nav,
  .github-corner,
  .sidebar,
  .sidebar-toggle {
    display: none;
  }
}

/* Mobile */
@media screen and (max-width: 640px) {
  .app-nav-merged {
    display: block;
  }

  body:has(.sidebar.show) {
    .app-nav,
    .github-corner {
      pointer-events: none;
    }

    .app-nav {
      left: 0;
    }

    main {
      &::before {
        width: 100%;
        background: rgba(0, 0, 0, 0.15);
        transition:
          width 0s,
          background var(--duration-medium);
      }
    }

    .sidebar-toggle {
      width: calc(100% - var(--sidebar-width));

      &:hover {
        background: transparent;
      }
    }

    main > .content {
      left: 0;
    }
  }

  body:has(.app-nav-merged) {
    .app-nav {
      display: none;
    }

    .markdown-section {
      margin-top: var(--content-margin-inline);
    }
  }
}