<style>
#search-box {
position: relative;
width: 100%;
margin: 0;
}

#search-form 
{
height: 40px;
border: 1px solid #777;
background-color: #fff;
overflow: hidden;
}
#search-text 
{
font-size: 14px;
color: #ddd;
border-width: 0;
background: transparent;
}

#search-box input[type="text"]
{
width: 90%;
padding: 11px 0 12px 1em;
color: #333;
outline: none;
}

#search-button {
position: absolute;
top: 0;
right: 0;
height: 42px;
width: 80px;
font-size: 14px;
color: #fff;
text-align: center;
line-height: 42px;
border-width: 0;
background-color: #010101;

cursor: pointer;
}
</style>

<div id='search-box'>
<form action='/search' id='search-form' method='get' target='_top'>
<input id='search-text' name='q' placeholder='Enter keyword...' type='text'/>
<button id='search-button' type='submit'><span><i class="fa fa-search"></i></span></button>
</form>
</div>