Контактная форма (CSS-макет)

HTML

<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
<div class="body">
    <div class="contact">
        <form action="#">
            <fieldset>					
                <div class="row">
                    <section class="col col-2">
                        <label class="input">
                            <i class="fa fa-append fa-user"></i>
                            <input type="text" placeholder="Имя" required>
                        </label>
                    </section>
                    <section class="col col-2">
                        <label class="input">
                            <i class="fa fa-append fa-envelope-o"></i>
                            <input type="email" placeholder="E-mail" required>
                        </label>
                    </section>
                </div>
                <section>
                    <label class="input">
                        <i class="fa fa-append fa-tag"></i>
                        <input type="text" placeholder="Тема">
                    </label>
                </section>               
                <section>
                    <label class="textarea">
                        <i class="fa fa-append fa-comment"></i>
                        <textarea rows="4" placeholder="Сообщение" required></textarea>
                    </label>
                </section>             
                <button type="submit" class="button">Отправить</button>
            </fieldset>						
        </form>
	</div>    
</div>

CSS

/*
* базовые стили
*/
@import url(http://fonts.googleapis.com/css?family=Open+Sans:300,400,700);
*{
   -webkit-box-sizing: border-box;
   -moz-box-sizing: border-box;
   box-sizing: border-box;
}

body {
   width: 100%;
   overflow: hidden;
   padding: 40px;
   background-attachment: fixed;
   background-position: 50% 0;
   background-size: cover;
   -webkit-text-size-adjust: none;
   background: -webkit-linear-gradient(90deg, #DAE2F8 10%, #D6A4A4 90%);
   background: -moz-linear-gradient(90deg, #DAE2F8 10%, #D6A4A4 90%);
   background: -ms-linear-gradient(90deg, #DAE2F8 10%, #D6A4A4 90%);       
   background: -o-linear-gradient(90deg, #DAE2F8 10%, #D6A4A4 90%); 
   background:  linear-gradient(90deg, #DAE2F8 10%, #D6A4A4 90%);      
}

/*
* контактная форма 
*/
.contact {
  max-width: 467px;
  min-width: 320px;
  margin: 0 auto;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 0 8px rgba(0,0,0,.3);
}
.contact * {
  outline: none;
  border: 0;
  background: none;
}
form fieldset {
  display: block;
  padding: 25px 30px;
}
form .row {
  margin: 0 -15px;
}
form .col-2 {
  width: 50%;
}
form .col {
  float: left;
  min-height: 1px;
  padding-right: 15px;
  padding-left: 15px;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
}
form .row:after {
  content: '';
  display: table;
  clear: both;
}
 form section {
  margin-bottom: 20px;
}
form .input, form .textarea, form .radio, form .checkbox, form .button {
  position: relative;
  display: block;
}
form .fa-append {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 29px;
  height: 29px;
  padding-left: 3px;
  border-left: 1px solid #e5e5e5;
  font-size: 15px;
  line-height: 29px;
  text-align: center;
  color: #ccc;
}
.fa {
  display: inline-block;
  font-family: FontAwesome;
  font-style: normal;
  font-weight: normal;
  line-height: 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.fa-user:before {
  content: "\f007";
}
.fa-envelope-o:before {
  content:...