.calculator-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:20px 0}.substitution-item{background:#3498db;color:white;padding:10px 15px;margin:5px;border-radius:20px;display:inline-block;font-size:14px}.shopping-list li{padding:5px 0;border-bottom:1px solid rgba(255,255,255,.3)}.shopping-list li:before{content:"🛒 ";margin-right:8px}@media (max-width:768px){.calculator-grid{grid-template-columns:1fr}}