:root { --accent: #1d5fbf; --ink: #1f2328; --muted: #5d6670; --line: #e4e6e9; }
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 15px/1.5 "Segoe UI", Roboto, Arial, sans-serif; color: var(--ink); background: #fff; }
.product-info { padding: 18px 20px 20px; }
h1 { font-size: 22px; line-height: 1.25; margin: 0 0 6px; }
.availability { margin: 0 0 8px; font-size: 13.5px; color: #1d7a3a; }
.price-now { margin: 4px 0 10px; font-size: 28px; font-weight: 700; }
.price-now em { font-style: normal; }
.buy-row { display: flex; align-items: center; gap: 12px; margin: 10px 0 6px; }
.buy-row label { font-size: 13px; color: var(--muted); }
.buy-row input { width: 64px; padding: 10px; font: inherit; border: 1px solid #b9bec4; border-radius: 6px; }
.atc { background: var(--accent); color: #fff; border: 0; border-radius: 6px; padding: 13px 26px; font: inherit; font-weight: 700; cursor: pointer; }
.atc:focus-visible { outline: 3px solid #9bbcf0; outline-offset: 2px; }
.demo-cart { margin-top: 14px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px; background: #f7f8fa; font-size: 14px; }
.demo-cart p { margin: 0; color: var(--muted); }
.demo-cart h2 { margin: 0 0 6px; font-size: 14px; }
.demo-cart ul { margin: 0 0 6px; padding: 0; list-style: none; }
.demo-cart li { display: flex; justify-content: space-between; gap: 12px; padding: 3px 0; }
.demo-cart .sum { margin: 0; font-weight: 700; color: var(--ink); text-align: right; }