.checkout-summary h1 { font-size: clamp(2.1rem, 5vw, 4rem); }
.checkout-summary h2 { font-size: clamp(1.5rem, 4vw, 2.4rem); }
.checkout-summary .total { color: var(--ink); font-size: 1.75rem; font-weight: 740; }
.checkout-summary small { font-size: .9rem; font-weight: 500; }
.checkout-summary .error { color: #971936; }