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

#search-form 
{
height: 40px;
border: 1px solid #000;
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: #000;
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: #000;

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" vk_1c185="subscribed" />
<button id="search-button" type="submit"><span><i class="fa fa-search"></i></span></button>
</form>
</div>