#search input::-webkit-input-placeholder {
   color: white;
   font-weight: 300 !important;
   font-style: italic;
}

#search input:-moz-placeholder { /* Firefox 18- */
   color: white;  
   font-weight: 300 !important;
   font-style: italic;
}

#search input::-moz-placeholder {  /* Firefox 19+ */
   color: white;  
   font-weight: 300 !important;
   font-style: italic;
}

#search input:-ms-input-placeholder {  
   color: white;  
   font-weight: 300 !important;
   font-style: italic;
}