#cart-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
}

#cart-modal .cart-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(18, 20, 34, 0.6);
}

#cart-modal .cart-modal-content {
    position: relative;
    width: min(640px, calc(100vw - 32px));
    margin: 12vh auto 0;
    background: #fff;
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.18);
}

#cart-modal .cart-modal-content h4 {
    margin: 0;
    color: #1a173f;
    text-align: center;
    font-size: clamp(1.6rem, 4vw, 2.75rem);
    line-height: 1.15;
    text-wrap: balance;
}

#cart-modal .cart-modal-actions {
    margin-top: 24px;
    display: flex;
    gap: 16px;
}

#cart-modal .cart-modal-actions .button {
    flex: 1 1 0;
    width: 100%;
    min-height: 52px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 12px 20px;
    border-radius: 999px;
    white-space: normal;
    line-height: 1.2;
}

#cart-modal .cart-modal-actions .button.button-secondary {
    border-width: 2px;
}

.cart-error-message {
    display: none;
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 10000;
    max-width: min(560px, calc(100vw - 32px));
    padding: 12px 16px;
    border-radius: 10px;
    background: #b3261e;
    color: #fff;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
}

@media (max-width: 782px) {
    #cart-modal .cart-modal-content {
        width: calc(100vw - 20px);
        margin-top: 10vh;
        padding: 24px 16px 18px;
        border-radius: 14px;
    }

    #cart-modal .cart-modal-actions {
        flex-direction: column;
        gap: 12px;
    }

    #cart-modal .cart-modal-actions .button {
        min-height: 50px;
        font-size: 1.05rem;
    }
}

@media (max-width: 480px) {
    #cart-modal .cart-modal-content {
        width: calc(100vw - 12px);
        margin-top: 8vh;
        padding: 20px 12px 14px;
        border-radius: 12px;
    }

    #cart-modal .cart-modal-content h4 {
        font-size: clamp(1.4rem, 7vw, 2rem);
    }

    .cart-error-message {
        left: 12px;
        right: 12px;
        bottom: 12px;
        max-width: none;
    }
}