.checkout-shell{display:grid;grid-template-columns:1.15fr .85fr;gap:45px;align-items:start;max-width:1180px;margin:auto}.checkout-summary,.payment-panel{padding:36px;border:1px solid #e7eaf2;border-radius:24px;background:#fff;box-shadow:0 25px 60px #17255412}.checkout-summary h1{font-size:clamp(38px,5vw,64px)}.price-row{display:flex;justify-content:space-between;padding:16px 0;border-bottom:1px solid #e7eaf2}.price-row.discount{color:#15803d}.price-row.total{font-size:22px;border-bottom:0}.payment-panel{position:sticky;top:100px}.payment-panel .btn{width:100%;margin:18px 0}@media(max-width:780px){.checkout-shell{grid-template-columns:1fr}.payment-panel{position:static}}