.tabs {
  display: flex;
  flex-wrap: wrap;
}
.tabs > section {
  order: 999;
  width: 100%;
  display: none;
}
.tabs > input {
  opacity: 0;
  position: absolute;
}
.tabs > input[type="radio"]:checked + label {
  background: yellow;
}
.tabs > input[type="radio"]:checked + label + section {
  display: unset;
}
.tabs > label {
  padding: 0.5em 1em;
  background: #b4d5e4;
  border-right: 1px solid #798f99;
}
.tabs > label:last-of-type {
  border-right: none;
}
.tabs > input[type="radio"]:checked + label {
  background: #798f99;
}
.tabs section {
  border: 1px #798f99 solid;
  border-top: 5px #798f99 solid;
  padding: 1em;
}
.body {
  padding: 2em;
}