{{-- Acción principal (layout.md §6.4): una por formulario o vista. --}}
<button {{ $attributes->merge(['type' => 'submit', 'class' => 'inline-flex h-9 items-center justify-center gap-2 rounded-lg px-4 text-[13px] font-semibold transition
    bg-[var(--acento)] text-[var(--acento-contraste)] hover:bg-[var(--acento-hover)] active:bg-[var(--acento-activo)]
    focus:outline-none focus-visible:ring-2 focus-visible:ring-[var(--acento)] focus-visible:ring-offset-2 focus-visible:ring-offset-[var(--superficie)]
    disabled:cursor-not-allowed disabled:opacity-50']) }}>
    {{ $slot }}
</button>