:root{--primary: #ff4757;--secondary: #2f3542;--bg: #f1f2f6;--text: #2f3542}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);line-height:1.4;padding:1rem}#app{max-width:400px;margin:0 auto}h1{font-size:1.5rem;margin-bottom:1rem;text-align:center;color:var(--primary)}.items{display:grid;gap:.5rem;margin-bottom:1.5rem}.item-btn{display:flex;justify-content:space-between;align-items:center;padding:1rem;border:none;border-radius:8px;background:#fff;font-size:1rem;cursor:pointer;box-shadow:0 2px 4px #0000001a;transition:transform .1s}.item-btn:active{transform:scale(.98)}.cart,.sales{background:#fff;border-radius:8px;padding:1rem;margin-bottom:1rem;box-shadow:0 2px 4px #0000001a}.cart h3,.sales h3{margin-bottom:.5rem;font-size:1.1rem}.cart-item{display:grid;grid-template-columns:1fr auto 30px;align-items:center;padding:.5rem 0;border-bottom:1px solid #eee}.cart-item:last-child{border-bottom:none}.cart-item button{background:var(--primary);color:#fff;border:none;border-radius:50%;width:24px;height:24px;font-size:16px;cursor:pointer}.total{margin:1rem 0;padding-top:.5rem;border-top:2px solid #eee;font-size:1.1rem}button{min-height:44px;font-size:1rem}.clear-btn,.checkout-btn{width:100%;padding:.75rem;margin-top:.5rem;border:none;border-radius:8px;cursor:pointer}.clear-btn{background:#ddd;color:var(--text)}.checkout-btn{background:var(--primary);color:#fff}.sales{text-align:center}