:root{color-scheme:light dark;font-family:system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;background:#f7f7f8;color:#1a1a1a}.app{max-width:1100px;margin:0 auto;padding:2rem 1.5rem 4rem}header h1{margin:0 0 .25rem;font-size:2rem}header p{margin:0 0 2rem;color:#555}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem}.card{background:#fff;border:1px solid #e2e2e5;border-radius:12px;padding:1.25rem}.card h2{margin:0 0 .75rem;font-size:1.1rem}.card-form{display:flex;flex-direction:column;gap:.5rem}.card-form input{padding:.5rem .6rem;border:1px solid #d5d5d9;border-radius:8px;font-size:.95rem}.card-form button{padding:.55rem;border:none;border-radius:8px;background:#2952e3;color:#fff;font-weight:600;cursor:pointer}.card-form button:disabled{opacity:.6;cursor:default}.offer-list{list-style:none;margin:1rem 0 0;padding:0;display:flex;flex-direction:column;gap:.5rem}.offer{display:flex;justify-content:space-between;gap:.5rem;padding:.5rem .6rem;background:#f2f3f7;border-radius:8px;font-size:.9rem}.offer-price{font-weight:600;white-space:nowrap}.error{color:#c0392b;font-size:.85rem}