.tabs {
  padding-left: 8px;
}

.tabs input {
  display: none;
}

.tabs label {
  border: 1px solid #000;
  border-radius: 16px 16px 0 0;
  cursor: pointer;
  padding: 8px 16px 8px;
  margin-right: -1px;
}

.tabs label:has(input:checked) {
  background: #9cf;
}

.main {
  border: 1px solid #000;
  margin: 8px;
  padding: 8px;
}

textarea {
  max-width: 100%;
}

footer {
  text-align: right;
}