#contactForm { 
  display: none;

  border: 6px solid salmon; 
  padding: 2em;
  width: 400px;
  text-align: center;
  background: #fff;
  position: fixed;
  top:50%;
  left:50%;
  transform: translate(-50%,-50%);
  -webkit-transform: translate(-50%,-50%)
  
}

input, select, textarea { 
  margin: .8em auto;
  font-family: inherit; 
  text-transform: inherit; 
  font-size: inherit;
  
  display: block; 
  width: 280px; 
  padding: .4em;
}
textarea { height: 80px; resize: none; }

.formBtn { 
  width: 140px;
  display: inline-block;
  
  background: teal;
  color: #fff;
  font-weight: 100;
  font-size: 1.2em;
  border: none;
  height: 30px;
}