.sign-in-to-share{width:350px;height:300px;margin-top:1rem;display:table-cell;vertical-align:middle;background:#efefef;text-align:center;color:#666}.avatar-group{margin:.25rem 0rem}.header-title{font-weight:600;font-size:18px;line-height:18px}.user-container{max-width:520px;width:100%}