static/main.css

/* 屏幕宽度大于等于500px的设备 */
@media screen and (min-width: 500px) {
    #chat_window {
        height: calc(80vh - 150px);
    }
    #chat_window .wrap {
        max-height: calc(80vh - 150px - var(--line-sm)*1rem - 2*var(--block-label-margin) );
    }
}
/* 屏幕宽度小于500px的设备 */
@media screen and (max-width: 499px) {
    #chat_window {
        height: calc(70vh - 180px);
    }
    #chat_window .wrap {
        max-height: calc(70vh - 180px - var(--line-sm)*1rem - 2*var(--block-label-margin) );
    }
}

#chat_window .user {
    text-align: right
}

#user_input {
  height: 100%;
  display: flex;
  flex-direction: column-reverse;
}

footer.svelte-1lyswbr.svelte-1lyswbr.svelte-1lyswbr {
    display: none;
}