body,
html {
  min-height: 100vh;
  display: flex;
  min-width: 100vw;
  box-sizing: border-box;
  overflow-x: hidden;
}
input.kleur,
.open2antwoord {
  width: 100%;
  margin-top: 10px;
}
* {
  transition: 0.2s;
}
.extra {
  display: none;
  padding: 20px 10px;
  border: 1px solid #aaa;
}

#checkboxes-0:checked ~ .maat-container {
  display: block;
}
#checkboxes-1:checked ~ .kleur-container {
  display: block;
}
#checkboxes-2:checked ~ .vraag1-container {
  display: block;
}
#checkboxes-3:checked ~ .vraag2-container {
  display: block;
}

th {
  padding: 4px;
  background: #eee;
}
tr:nth-of-type(odd) {
  background: #f4f4f4;
}

.form-group em {
  padding-left: 15px;
  display: block;
  margin: 4px;
}

input::placeholder {
  color: #dadada !important;
}