p {
    font-size: 15px;
    line-height: 1.5em;
}

.checkout-area {
    flex-direction: column;
}

.checkout-area .billing-area {
    width: calc(100% - 30px);
    border-bottom: none;
}

.checkout-area .order-area {
    width: calc(100% - 30px);
}

section.gallery h1 {
    font-size: 165%;
    position: relative !important;
    top: -1rem !important;
}

@media (max-width: 991px) {

    .checkout-area {
        margin: 2rem 0;
    }

    .checkout-area :is(.billing-area, .order-area) {
        width: 100%;
        margin: 0px !important;
    }

}