* {
-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, Edge, Opera and Firefox */
}