@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 200;
  src: url(https://fonts.gstatic.com/s/sourcesanspro/v22/6xKydSBYKcSV-LCoeQqfX1RYOo3i94_wlxdr.ttf) format('truetype');
}
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 300;
  src: url(https://fonts.gstatic.com/s/sourcesanspro/v22/6xKydSBYKcSV-LCoeQqfX1RYOo3ik4zwlxdr.ttf) format('truetype');
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-weight: 300;
}
body {
  background-color: #d5e6ff;
  font-family: 'Source Sans Pro', sans-serif;
  color: white;
  font-weight: 300;
}
.wrapper {
  background: #052658;
  background: -webkit-linear-gradient(top left, #052658 0%, #123d7e 100%);
  background: -moz-linear-gradient(top left, #052658 0%, #123d7e 100%);
  background: -o-linear-gradient(top left, #052658 0%, #123d7e 100%);
  background: linear-gradient(to bottom right, #052658 0%, #123d7e 100%);
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 400px;
  margin-top: -200px;
  overflow: hidden;
}
.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 80px 0;
  height: 400px;
  text-align: center;
}
.container h1 {
  font-size: 40px;
  font-weight: 200;
    
}
form {
  padding: 20px 0;
  position: relative;
  z-index: 2;
}
form button {
  appearance: none;
  outline: 0;
  background-color: white;
  border: 0;
  padding: 10px 15px;
  color: #052658;
  border-radius: 3px;
  width: 250px;
  cursor: pointer;
  font-size: 18px;
}
form button:hover {
  background-color: #f5f7f9;
}

.center {
  width: 50%; /* or any width */
  margin-left: auto;
  margin-right: auto;
}