Here is a text area that functions like a post. It is designed to break at the end of the post instead of overflowing on the same line.
.post input {
outline: none;
font-size: 15px;
font-family: sans-serif;
font-weight: 300;
width: 200px;
padding-top: 15px;
padding-left: 25px;
font-size: 25px;
border: none;
background-color: transparent;
width: 100%;
}
<div class="post">
<input type="textarea" placeholder="What's on your mind?" rows="4" cols="50">
</div>