.brucpopup #newsletter_subscription {
    width: 100%;
    max-width: 670px;
    margin-top: 20px;
    margin-left: auto;
    margin-right: auto;
}

.brucpopup #newsletter_subscription form {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 9px;
    flex-wrap: nowrap;
}

.brucpopup #newsletter_subscription input {
    flex: 0 1 125px;
    width: 125px;
    min-width: 0;
    border: 1px solid #aaa;
    border-radius: 5px;
    padding: 5px;
}

.brucpopup #newsletter_subscription input[name="email"] {
    flex-basis: 140px;
    width: 140px;
}

.brucpopup #newsletter_subscription input[name="nascimento"] {
    flex-basis: 145px;
    width: 145px;
}

.brucpopup #newsletter_subscription button,
.brucpopup #newsletter_subscription .btn {
    flex: 0 0 auto;
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 6px 10px;
}

@media screen and (max-width: 600px) {
    .brucpopup #newsletter_subscription {
        width: 100%;
        max-width: 100%;
        margin-top: 15px;
    }

    .brucpopup #newsletter_subscription form {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
        gap: 9px;
        flex-wrap: nowrap;
    }

    .brucpopup #newsletter_subscription input,
    .brucpopup #newsletter_subscription input[name="email"],
    .brucpopup #newsletter_subscription input[name="nascimento"] {
        width: 100%;
        max-width: 100%;
        flex: none;
        box-sizing: border-box;
    }

    .brucpopup #newsletter_subscription button,
    .brucpopup #newsletter_subscription .btn {
         width: auto;
		 align-self: center;
    }
}