.theme-company-logo {
    background: transparent url('images/logo.png') no-repeat !Important;
}

.alfresco-guest, #SHARE_HEADER {
    background-color: #717171 !Important;
}

.alfresco-guest {
	background: url('images/background.jpg') no-repeat !Important;
	background-size: cover !Important;
}

.alfresco-logo-Logo .alfresco-logo-only {
    width: 48px !Important;
}