* {
  box-sizing: border-box;
}

body {
  background: #f1f3f5;
  font-family: segoe ui, roboto, oxygen, ubuntu, cantarell, fira sans, droid sans, helvetica neue, sans-serif;
}

.container {
  box-shadow: 0 6px 8px rgba(102, 119, 136, 0.03), 0 1px 2px rgba(102, 119, 136, 0.3);
  background-color: #fff;
  width: 500px;
  height: auto;
  margin: 40px auto;
  padding: 20px 30px 20px 30px;
}

.container:first-child > * {
  padding-left: 40px;
}

h1 {
  font-weight: 400;
  margin-bottom: 30px;
}

h1 > span {
  display: block;
  font-weight: 400;
  font-size: 0.9rem;
  color: #999;
  margin-top: 0;
}

button, input[type=text] {
  padding: 8px;
  border-radius: 4px;
  border: 1px solid #f2f2f2;
  display: inline-block;
  margin-left: 20px;
  min-width: 200px;
}

input[type=radio] {
  position: relative;
  top: 2px;
}

button {
  background-color: #28a745;
  color: white;
  font-size: 0.9rem;
  min-width: auto;
  padding: 10px 25px 10px 25px;
}

.input-control {
  margin-bottom: 15px;
}

.input-control.button, .input-control.controls {
  margin-top: 25px;
  margin-left: 80px;
}

.input-control.controls {
  margin-left: 95px;
  font-size: 0.9rem;
}

.container.result {
  padding-left: 0;
  padding-right: 0;
  font-size: 1rem;
  text-align: center;
}

p.answer {
  font-size: 6rem;
  margin: 0;
  color: #dc3545;
  font-weight: 300;
}

#article {
  padding: 3% 10%;
}