main.css

* {
  box-sizing: border-box;
}
body {
  background-color: #DDD;
  color: 222;
  font-family: 'Noto Sans', sans-serif;
  font-weight: 400;
}

#login-box {
  position: relative;
  margin: 5%; auto;
  background-color: #FFF;
  width: 600px;
  height: 400px;
  border-radius: 2px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4);
}

.left, .right {
  padding: 40px;
  width: 300px;
  height: 400px;
  position: absolute;
  top: 0;
}
.left {
  left: 0;
}
.right{
  right: 0;
  background-image: url("http://goo.gl/YbktSj");
  background-size: cover;
  background-position: center;
  border-radius: 0 2px 2px 0;
}

h1 {
  margin: 0 0 20px 0;
  font-weight: 300;
  font-size: 2em;
}

input {
  border: none;
  border-bottom: 1px solid #AAA;
  margin-bottom: 20px;
  padding: 4px;
}
.sign-up-button {
  margin: 5px auto;
  width: 220px;
  height:32px;
  border: none;
  border-radius: 2px;
  background-color: #16A085;
  color: #FFF;
  text-transform: uppercase;
  font-weight: 400px;
}
.sign-up-button:hover {
  opacity: 0.8;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
  transition: 0.8s ease;
}
.sign-up-button:active {
  opacity: 1;
  box-shadow: 0 1px 2px rgb(0, 0, 0, 0.4);
}
input:focus {
  border-botton: 2px solid #16a085;
  color: #16a085;
  transition: 0.7s ease;
}
.login-width {
  display: block;
  margin-bottom: 40px;
  font-size: 2em;
  color: #FFF;
  text-align: center;
}
.social-signin {
  margin-bottom: 20px;
  width: 220px;
  height: 36px;
  border: none;
  border-radius: 2px;
  color: #FFF;
}
.facebook {
  background: #32508E;
}
.twitter {
  background: #55ACEE;
}
.google {
  background: #DD4B39;
}
.or {
  position: absolute;
  top: 180px;
  left: 280px;
  width: 40px;
  height:40px;
  background: #DDD;
  border-radius: 50%;
  text-align: center;
  line-height: 40px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}