converse.js/sass/_minimized_chats.scss

#conversejs {
    converse-chats {
        &.converse-overlayed {
            converse-minimized-chats {
                order: 100;
            }

            #minimized-chats {

                width: var(--minimized-chats-width);
                margin-bottom: 0;
                border-top-left-radius: var(--chatbox-border-radius);
                border-top-right-radius: var(--chatbox-border-radius);
                color: var(--inverse-link-color);
                margin-right: var(--chat-gutter);
                padding: 0;

                .badge {
                    bottom: 8px;
                    border: 1px solid var(--overlayed-badge-color);
                }

                #toggle-minimized-chats {
                    border-top-left-radius: var(--chatbox-border-radius);
                    border-top-right-radius: var(--chatbox-border-radius);
                    background-color: var(--link-color);
                    padding: 1em 0 0 0;
                    text-align: center;
                    color: white;
                    white-space: nowrap;
                    overflow-y: hidden;
                    text-overflow: ellipsis;
                    display: block;
                    height: 45px;
                    width: 9em;
                }

                a.restore-chat {
                    cursor: pointer;
                    padding: 1px 0 1px 5px;
                    color: var(--chat-head-text-color);
                    line-height: 15px;
                    display: block;
                    overflow: hidden;
                    text-overflow: ellipsis;
                    white-space: nowrap;
                    &:hover {
                        text-decoration: none;
                    }
                }

                a.restore-chat:visited {
                    color: var(--chat-head-text-color);
                }

                .minimized-chats-flyout {
                    flex-direction: column-reverse;
                    bottom: 45px;
                    width: var(--minimized-chats-width);

                    .chat-head {
                        min-height: 0;
                        padding: 0.3em;
                        border-radius: var(--chatbox-border-radius);
                        height: 35px;
                        margin-bottom: 0.2em;
                        width: 100%;
                        max-width: 9em;
                        flex-wrap: nowrap;
                    }
                    &.minimized {
                        height: auto;
                    }
                }

                .unread-message-count {
                    font-weight: bold;
                    background-color: white;
                    border: 1px solid;
                    text-shadow: 1px 1px 0 var(--text-shadow-color);
                    color: var(--warning-color);
                    border-radius: 5px;
                    padding: 2px 4px;
                    font-size: 16px;
                    text-align: center;
                    position: absolute;
                    right: 116px;
                    bottom: 10px;
                }
                .unread-message-count-hidden,
                .chat-head-message-count-hidden {
                    display: none;
                }
            }
        }
    }
}