style.css

html, body {
  height: 100%;
  width: 100%;
  margin: 0;
  box-sizing: border-box;
}

body {
  height: 90%;
  font: caption;
  padding: 15px;
  padding-top: 0;
  color: white;
  background: linear-gradient(to bottom right, #480048, #C04848);
}

.content {
  margin:auto;
}
.cus-nav {
  margin-bottom: 20px;
}

h4, label {
  color: white;
}

h3 {
  text-align: center;
  color: white;
}

#wrapper{
  float:left;
  width: 100%;
  display: block;
}

#deck1, #deck2 {
  float: left;
  width: 40%;
}
#deck2 {
  /* display:none;*/
}
 #deck1-2 {
   float: left;
   margin: 30px;
   padding-top: 4em;
 }

.btn-primary {
  color: #ffffff;
  background-color: #0060df;

}

#error {
  color: white;
  text-align: center;
}

#submit,#next {
  background-color:#C04848;
  color: white;
	-moz-border-radius:3px;
	-webkit-border-radius:3px;
	border-radius:0px;
	border:0.5px solid white;
	display:inline-block;
  margin: auto;
  padding: 7px 10px;
}

#back {
 background-color:#480048;
 color: white;
 -moz-border-radius:3px;
 -webkit-border-radius:3px;
 border-radius:0px;
 border:0.5px solid white;
 display:inline-block;
 margin: 20px;
 padding: 7px 10px;
}

.nav-cus-item{
  margin-left: 15px;
  margin-right: 15px;
}
.checkbox {
	display: inline-block;
	cursor: pointer;
	font-size: 17px;
  margin-right:15px;
  line-height:25px;
}
input[type=checkbox] {
 display:none;
}
.checkbox:before {
	content: " ";
	display: inline-block;
	width: 20px;
	height: 20px;
	vertical-align:middle;
	background-color: white;
	color: #C04848;
	text-align: center;
	box-shadow: inset 0px 2px 3px 0px rgba(0, 0, 0, .3), 0px 1px 0px 0px rgba(255, 255, 255, .8);
	border-radius: 3px;
}

input[type=checkbox]:checked + .checkbox:before {
	content: "\2713";
	text-shadow: 1px 1px 1px rgba(0, 0, 0, .2);
	font-size: 20px;
}


.btn-light {
  margin: 10px;
}

.btn-light:hover {
  background-color: #c94b4b;
}