.wc-m2-calculator {
    margin: 1rem 0 1.5rem;
    padding: 1rem;
    border: 1px solid rgba(0,0,0,.08);
    border-radius: 8px;
    background: #fafafa;
}

.wc-m2-calculator__unit-note,
.wc-m2-price-note,
.wc-m2-calculator__cart-note small {
    color: #666;
}

.wc-m2-calculator__row {
    margin-bottom: 1rem;
}

.wc-m2-calculator__row label {
    display: block;
    font-weight: 600;
    margin-bottom: .35rem;
}

.wc-m2-calculator__control {
    display: flex;
    align-items: center;
    gap: .5rem;
    max-width: 320px;
}

.wc-m2-calculator__control input {
    width: 120px;
    text-align: center;
}

.wc-m2-calculator__btn {
    min-width: 40px;
    min-height: 40px;
    border: 1px solid #d1d5db;
    background: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
}

.wc-m2-calculator__summary p {
    margin: .4rem 0;
}

.wc-m2-calculator__error {
    margin-top: .75rem;
    color: #b91c1c;
    font-weight: 600;
}