body {
  background-color: #d3d3d3;
  color: #000;
  font: 2em;
}
#top {
  margin: 2% 0% 2% 0%;
}
#calc {
  border: 10px solid #333;
  padding: 2% 5% 5% 5%;
  min-height: 75vh;
}
#calc h2 {
  text-align: center;
}
#default {
  text-align: center;
}

input , textarea {
  background-color: #0003;
  border: none;
  border-bottom: 3px solid #fff;
  max-width: 100%;
  color: #000;
  font-size: 1.5em;
}
button {
  background-color: #0003;
  color: #000;
  border: none;
  font-size: 1.5em;
  border-bottom: 3px solid #0003;
}
#calc button {
 margin: 2% 0% 4% 0%;
}
#footer {
  bottom: 0;
  text-align: center;
}
a {
  text-decoration: none;
  color: #000;
}
a:hover {
  text-decoration: none;
  color: #fff;
}

#article {
  padding: 5% 13% 1%;
}

a {
  color:rgb(0, 4, 255);
}