*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f7f9fc;color:#333;padding:16px}.app-container{max-width:1280px;margin:0 auto;display:flex;flex-direction:column;gap:32px}h2{margin-bottom:16px;font-size:1.5rem}.services-grid{display:grid;grid-template-columns:1fr;gap:16px}.service-item{background:#fff;border-radius:12px;padding:20px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 8px #0000001a}.service-info{flex-grow:1}.service-name{font-size:1.1rem;margin-bottom:4px}.service-price{font-weight:700;color:#06c}.add-btn{background:#06c;color:#fff;border:none;padding:10px 20px;border-radius:8px;cursor:pointer;font-size:1rem}.add-btn:hover{background:#05a}.summary-sidebar{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 8px #0000001a;position:sticky;top:16px}.selected-list{list-style:none;margin:16px 0}.selected-list li{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid #eee}.total{display:flex;justify-content:space-between;font-size:1.2rem;margin:20px 0}.checkout-btn{width:100%;background:#28a745;color:#fff;border:none;padding:14px;border-radius:8px;font-size:1.1rem;cursor:pointer}.checkout-btn:hover{background:#218838}@media(min-width:768px){.services-grid{grid-template-columns:repeat(2,1fr)}.app-container{flex-direction:row}.main-content{flex:1}.summary-sidebar{width:360px}}@media(min-width:1024px){.services-grid{grid-template-columns:repeat(3,1fr)}}