html {
  background: url(../resources/background.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  font-family: "Roboto", sans-serif;
}

.center {
  text-align: center;
}
.card {
  position: absolute;
  margin: auto;
  width: 60%;
  top: 5%;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 10px;
  background: rgba(225, 225, 225, 0.80);
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.4);
  transition: 0.3s;
  border-radius: 12px; 
}


.container {
  padding: 2px 16px;
  font-size: 1.2em;
}

.title { 
  font-family: "Roboto", sans-serif;
  font-size: 4em;
}

.flip {
  display: inline-block; 
  -webkit-transform: matrix(-1, 0, 0, 1, 0, 0);
  -moz-transform: matrix(-1, 0, 0, 1, 0, 0);
  -o-transform: matrix(-1, 0, 0, 1, 0, 0);
  transform: matrix(-1, 0, 0, 1, 0, 0);
}

.subtitle {
  font-weight: bold;
}

.links {
  margin: 20px;
}

.button {
  background: #3498db;
  background-image: -webkit-linear-gradient(top, #3498db, #2980b9);
  background-image: -moz-linear-gradient(top, #3498db, #2980b9);
  background-image: -ms-linear-gradient(top, #3498db, #2980b9);
  background-image: -o-linear-gradient(top, #3498db, #2980b9);
  background-image: linear-gradient(to bottom, #3498db, #2980b9);
  -webkit-border-radius: 8;
  -moz-border-radius: 8;
  border-radius: 8px;
  text-shadow: 1px 1px 3px #666666;
  -webkit-box-shadow: 0px 1px 3px #666666;
  -moz-box-shadow: 0px 1px 3px #666666;
  box-shadow: 0px 1px 3px #666666;
  font-family: Arial;
  color: #ffffff;
  font-size: 20px;
  padding: 10px 20px 10px 20px;
  border: solid #1f628d 2px;
  text-decoration: none;
}

.button:hover {
  background: #3cb0fd;
  background-image: -webkit-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -moz-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -ms-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -o-linear-gradient(top, #3cb0fd, #3498db);
  background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
  text-decoration: none;
}