castopod/app/Resources/styles/formInputTabs.css

@layer components {
  .form-input-tabs > input[type="radio"] {
    @apply absolute -left-full;
  }

  .form-input-tabs .tab-panel {
    @apply hidden;
  }

  /* Logic for 2 tabs at most */
  .form-input-tabs
    > input:first-child:checked
    ~ .tab-panels
    > .tab-panel:first-child,
  .form-input-tabs
    > input:nth-child(3):checked
    ~ .tab-panels
    > .tab-panel:nth-child(2) {
    @apply block;
  }

  /* Styling */
  .form-input-tabs > label {
    @apply relative inline-block px-1 py-2 text-xs text-center cursor-pointer opacity-70 hover:opacity-100;
  }

  .form-input-tabs > input:focus + label {
    @apply ring-accent;
  }

  .form-input-tabs > input:checked + label::after {
    @apply absolute inset-x-0 bottom-0 w-full mx-auto bg-accent-base;

    content: "";
    height: 0.2rem;
  }

  .form-input-tabs > input:checked + label {
    @apply font-semibold opacity-100 text-accent-base;
  }
}