LibreChat/client/src/mobile.css

.nav-mask {
  position: fixed;
  z-index: 998;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background-color: rgba(86, 88, 105, 0.75);
  padding-left: 420px;
  padding-top: 12px;
  opacity: 0;
  transition: all 0.5s;
  pointer-events: none;
}

.nav {
  transition: all 0.5s;
}

.nav-close-button {
  display: none;
}

@media (min-width: 1024px) {
  .sibling-switch-container {
    display: none;
  }
}

@media (max-width: 1024px) {
  /* .sibling-switch {
        left: 114px;
        top: unset;
        bottom: 4px;
        visibility: visible;
        z-index: 2;
    } */
  .sibling-switch {
    display: none;
  }

  .resubmit-edit-button {
    display: block;
    visibility: visible;
  }
}

@media (max-width: 767px) {
  .nav-close-button {
    display: block;
    position: absolute;
    left: 100%;
    top: 12px;
    margin-left: 20px;
  }

  .nav {
    position: fixed;
    z-index: 999;
    left: calc(-100%);
    top: 0;
    bottom: 0;
    max-width: 320px;
    width: calc(100% - 60px);
    opacity: 0;
  }

  .nav.active {
    left: 0;
    opacity: 1;
  }

  .nav-mask.active {
    opacity: 1;
    pointer-events: auto;
  }
}