html {
  box-sizing: border-box;
}

*, *:before, *:after {
  box-sizing: inherit;
}


body {
  background: #f5f5f5;
  color: #333;
  font-family: arial, helvetica, sans-serif;
  font-size: 32px;
}

h1 {
  font-size: 32px;
  text-align: center;
}

p {
  font-size: 20px;
  line-height: 1.5;
  margin: 40px auto 0;
  max-width: 640px;
}

pre {
  background: #eee;
  border: 1px solid #ccc;
  font-size: 16px;
  padding: 20px;
}

form {
  margin: 40px auto 0;
}

label {
  display: block;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 10px;
}

input {
  border: 2px solid #333;
  border-radius: 5px;
  color: #333;
  font-size: 32px;
  margin: 0 0 20px;
  padding: .5rem 1rem;
  width: 100%;

}

button {
  background: #fff;
  border: 2px solid #333;
  border-radius: 5px;
  color: #333;
  font-size: 16px;
  font-weight: bold;
  padding: 1rem;
}

button:hover {
  background: #333;
  border: 2px solid #333;
  color: #fff;
}

.main {
  background: #fff;
  border: 5px solid #ccc;
  border-radius: 10px;
  margin: 40px auto;
  padding: 40px;
  width: 80%;
  max-width: 700px;
}