Mascara para CEP

        function handleCep(event) {
            let input = event.target;
            input.value = cepMask(input.value);
        }

        function cepMask(value) {
            if (!value) return "";
            value = value.replace(/\D/g, ""); // Remove tudo que não for dígito
            value = value.replace(/(\d{2})(\d)/, "$1.$2");
            value = value.replace(/(\d{3})(\d{3})$/, "$1-$2");
            return value;
        }