.oe_chatter {

    .btn.o_active_attach {
        height: 300px;
    }
    .o_mail_chatter_attachments {
        min-height: 50px;

        .o_chatter_attachment {
            padding: 3px;

            input.o_input_file {
                position: absolute;
                top: 1px;
                opacity: 0;
                pointer-events: none;
            }

            .o_border_dashed {
                position: relative;
                margin-top: 5px;
                margin-bottom: 5px;
                border-bottom: 1px dashed gray('300');
                text-align: center;

                .o_attach_title {
                    position: relative;
                    top: 10px;
                    margin: 0 auto;
                    padding: 0 10px;
                    font-weight: bold;
                    background: white;
                }
            }
        }
    }
}