css – placeholder – change style

<style>
::placeholder { /* Chrome, Firefox, Opera, Safari 10.1+ */
            color: silver;
            opacity: 1; /* Firefox */
            font-style: italic;
        }

        :-ms-input-placeholder { /* Internet Explorer 10-11 */
            color: silver;
            font-style: italic;
        }

        ::-ms-input-placeholder { /* Microsoft Edge */
            color: silver;
            font-style: italic;
        }
</style>