*{
-webkit-touch-callout: none;
/* iOS Safari */
-webkit-user-select: none;
/* Safari */
-khtml-user-select: none;
/* Konqueror HTML */
-moz-user-select: none;
/* Old versions of Firefox */
-ms-user-select: none;
/* Internet Explorer/Edge */
user-select: none;
 /* Non-prefixed version, currently supported by Chrome, Opera and Firefox */
}