style.css

body{
  color: #777;
  background: #4CAF50;
}

h1{
  font-size:35px;
  font-weight: 100;
}

h2{
  font-size: 15px;
  font-weight: 50;
}

input{
  width: 100%;
  height: 40px;
  margin: 0px 0px 10px;
  padding: 10px;
  display: block;
}

button{
  width: 100%;
  height: 35px;
  background-color: #4CAF50;
  color: white;
  border: none;
}

button:hover{
  background-color: #F9F9F9;
  border: solid;
  border-color: #4CAF50;
  color: #777;
}

input:hover{
  border-width: 1px;
  border-color:#4CAF50;
}


#container{
  width: 400px;
  margin: auto;
  margin-top: 150px;
}

#form{
  padding: 25px;
  background-color: #F9F9F9;
  box-shadow: 0px 0px 25px 0px;
}

/* mobile version, can choose not to put */
@media (max-width:640px){
  #container{
    margin-top: 125px;
  }
}