.crmEntityFormView, .entitylist, .modal-content, .popover-content {    
border: 0px solid !important;
}

.crmEntityFormView .cell,
.crmEntityFormView td.cell,
td.clearfix.cell.form-control-cell {
    padding: 0 !important;          
}

.browserPreviewFrameBorder,             
.browserPreviewFrameBorder.tabletPortraitPreview {
    padding: 0 !important;
}

.browserPreviewFrameBorder iframe,
iframe.browserPreviewFrame {
    padding: 0 !important;
}