input {
  text-align: center;
  width: 49px;
  margin-right: 10px;
  padding: 5px;
  border: none;
  border-bottom: 3px solid #c9c9c9;
  transition: border 0.3s;
}

.well {
  width: 700px;
  margin: auto;
  margin-top: 90px;
}

.p {
  margin: 9px 3px 0 -5px;
  display: inline;
}

input:focus {
  outline: none;
  border-bottom: 3px solid #969696;
}

#result {
  margin-top: 15px;
}

input:focus,
input.focus {
  border-bottom: solid 3px #969696;
}

.btn {
  border-radius: 0;
}


#article {
  padding: 3% 10% 1%;
}