body {
  background-color: ;
}

.container {
  margin: 30px auto auto auto;
  padding: 15px;
}
#input {
  border-radius:3px;
  color: gray;
  position: relative;
}

#inputBi {
  border-radius:3px;
  color: gray;
  position: relative;
}


#input:focus {
  
}

.binary-output{
  margin: 20px 200px 20px 200px;
  border: 2px solid gray;
  border-radius: 3px;
  
}

h1 {
  padding-bottom:  10px;
  margin-top: -20px;
}

#article {
  padding:3% 15%;
}