body {
  max-width: 80%;
  margin: auto;
  display: block;
}

h1,h2,h3 {
  text-align: center;
}

h1 {
  font-size: 3.2em;
}

h2 {
  font-size: 3em;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

input {
  height: 3em;
  font-size: 2em;
  text-align: center;
  margin-bottom: 0.5em;
  margin-right: 1em;
  vertical-align: middle;
}

input[type='submit'] {
  padding-left: 2em;
  padding-right: 2em;
  border-radius: 10px;
}

label {
  font-size: 2em;
  margin-bottom: 2em;
}

input:invalid {
  border: 2px red solid;
}

input[type="radio"]:required,input[type="checkbox"]:required {
  accent-color: black;
  transform: scale(2);
  height: 1em;
}

div.centering {
  text-align: center;
}

div.akapit {
  margin-left: 6em;
}