.o_chat_window {
    &.o_thread_less {
        .o_chat_search_input {
            .o-flex-display();
            padding: 5px;
            > span {
                .o-flex(0, 0, auto);
            }
            > input {
                margin-left: 5px;
                .o-flex(1, 1, 100%);
            }
        }
        .o_mail_thread {
            background-color: lightgray;
        }
        .o_chat_composer {
            display: none;
        }
    }

    .o_chat_composer {
        .o_composer {
            border-top: 1px solid lightgray;
            .o_composer_input textarea {
                display: block;
                padding: 5px;
            }
        }
        .o_composer_attachments_list, .o_composer_buttons {
            display: none;
        }
    }
}