div.chat-content > div.chat-messages {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  grid-gap: 0.5rem;
}

div.chat-content > div.chat-messages > span:not(:last-child) {
  width: 100%;
  border-bottom: 1px solid #ccc;
  padding: 0 0 0.5rem 0;
}

.chat-message-hovered {
  transition: 200ms;
  box-shadow: 0 0 0 1px #fff, 0 0 0 3px #000;
}