popup.css

.popup {
  position: absolute;
  top: 10px;
  right: 30px;
  /* visibility must transition immediately so that input elements inside the popup can get focus */
  transition: all 0.3s cubic-bezier(0.74, -0.05, 0.27, 1.75), visibility 0s;
  z-index: 500;
}

.popup:not(.popup-show):not(#users.chatAndUsers) {
  opacity: 0;
  transform: scale(0.7);
  /* visibility must not change to hidden until the end of the transition */
  transition: all 0.3s cubic-bezier(0.74, -0.05, 0.27, 1.75);
  visibility: hidden;
}

#mycolorpicker {
  top: 0;
}
.popup.toolbar-popup {
  right: auto;
  margin-left: -10px;
}
.popup-content {
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  box-shadow: 0 2px 4px #ddd;
  background: #f7f7f7;
  min-width: min(300px, 90vw);
  max-width: min(600px, 95vw);
  /* Constrain height so popups (notably Settings with Pad-wide Settings
     enabled) scroll instead of cropping items off-screen on short windows.
     Fixes #7696. */
  max-height: calc(100vh - 20px);
  overflow-y: auto;
}

/* Chat manages its own scroll and floats author-colour pickers outside the
   popup, so it must not become a scroll container. */
.popup#users .popup-content {
  overflow: visible;
}
.popup input[type=text] {
  width: 100%;
  padding: 5px;
  display: block;
  margin-top: 10px;
}
.popup input[type=text], #users input[type=text] {
  outline: none;
}
.popup h1 {
  font-size: 1.8rem;
  margin-bottom: 10px;
}
.popup h2 {
  opacity: .7;
  margin: 10px 0;
  font-size: 1.2rem;
}
.popup:not(.comment-modal) p {
  margin: 5px 0;
}

/* When a settings checkbox is disabled (e.g. "Chat always on screen" while
   "Disable chat" is ticked), the browser greys the checkbox itself but the
   adjacent `<label>` still looks active, leaving the row visually clickable
   even though it isn't. Match the row to the checkbox's disabled state.
   Fixes #7592. */
.popup input[type="checkbox"]:disabled + label,
.popup input[type="radio"]:disabled + label {
  color: #999;
  cursor: not-allowed;
}

/* Mobile devices */
@media only screen and (max-width: 800px) {
  .popup {
    border-radius: 0;
    top: 1rem;
    margin: 0 !important;
    right: 1rem !important;
    left: 1rem !important;
    max-width: none !important;
  }
  .popup-content {
    max-height: 80vh;
  }
}
/* Move popup to the bottom, except popup linked to left toolbar, like hyperklink popup */
.mobile-layout .popup:not(.toolbar-popup) {
  top: auto;
  left: 1rem;
  right: auto;
  bottom: 1rem;
}