h1 {
  color: #000000;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 250%;
}
body{
  background-color: #737373;
}
.title{
  text-align: center;
  padding-bottom: 10px;
}
nav{
  text-align: center;
}
.card{
  background-color: #bfbfbf;
}
.written{
  background-color: #bfbfbf;
}
nav, .btn{
  margin: 2px;
}

.btn-primary{
  background-color: orange;
  color: black;
  border: black;
}