<input type="text" placeholder="Name *">
<div class="wrap">
<label for="txt">Имя<span>*</span></label>
<input type="text" id="txt">
</div>
.wrap{
position: relative;
}
label{
position: absolute;
left: 10px;
top: 5px;
color: #aaa;
}
span{
color: red;
}
::placeholder {
color: red;
}