Style native checkboxes with accent-color

:root {
  --accent: #2563eb;
  accent-color: var(--accent);
}

/* Markup: <label class="choice"><input type="checkbox"> Label</label> */
label.choice {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

label.choice input {
  width: 1.1rem;
  height: 1.1rem;
  margin: 0;
}

/* Keyboard focus stays visible around the whole labelled control. */
label.choice:has(input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 0.25rem;
}

/* Disabled choices dim while the label text stays readable. */
label.choice:has(input:disabled) {
  opacity: 0.6;
  cursor: not-allowed;
}