*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px}.demo-content{max-width:1200px;margin:0 auto;padding:40px;background:#fff;border-radius:20px;box-shadow:0 20px 60px #0000004d}h1{text-align:center;color:#333;margin-bottom:30px;font-size:2.5em}.controls{text-align:center;margin-bottom:30px}.control-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:15px 40px;border-radius:50px;font-size:1.1em;font-weight:700;cursor:pointer;transition:transform .3s,box-shadow .3s;margin:0 10px}.control-btn:hover{transform:scale(1.05);box-shadow:0 5px 20px #667eea66}.control-btn.stop{background:linear-gradient(135deg,#dc2626,#991b1b)}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px;margin-top:30px}.product-card{background:linear-gradient(135deg,#f5f7fa,#c3cfe2);border-radius:15px;padding:20px;cursor:pointer;transition:transform .3s,box-shadow .3s}.product-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px #0003}.product-image{width:100%;height:200px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:4em;margin-bottom:15px}.product-name{font-size:1.2em;font-weight:700;color:#333;margin-bottom:10px}.product-price{font-size:1.5em;color:#667eea;font-weight:700}.loader-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0006;display:none;z-index:9999;pointer-events:none}.loader-overlay.active{display:block}.snowflake{position:absolute;top:-20px;color:#fff;font-size:2em;animation:fall linear infinite;text-shadow:0 0 10px rgba(255,255,255,.8);pointer-events:none}@keyframes fall{to{transform:translateY(100vh) rotate(360deg)}}.santa-container{position:fixed;bottom:25%;left:-250px;z-index:10000;animation:santaRun 8s linear infinite;filter:drop-shadow(0 10px 20px rgba(0,0,0,.5))}.santa-image{width:200px;height:200px;object-fit:contain}@keyframes santaRun{0%{left:-250px}to{left:calc(100% + 250px)}}.gift-trail{position:fixed;bottom:calc(25% + 40px);animation:productFloat 8s linear infinite;filter:drop-shadow(0 5px 10px rgba(0,0,0,.3));z-index:9999}.product-mini-card{width:50px;height:50px;background:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.5em;box-shadow:0 3px 10px #0000004d}.gift-trail:nth-child(1){animation-delay:1s}.gift-trail:nth-child(2){animation-delay:2s}.gift-trail:nth-child(3){animation-delay:3s}.gift-trail:nth-child(4){animation-delay:4s}.gift-trail:nth-child(5){animation-delay:5s}@keyframes productFloat{0%{left:-200px;opacity:0;transform:translateY(0) rotate(0) scale(1)}15%{opacity:1}85%{opacity:1}to{left:calc(100% + 200px);opacity:0;transform:translateY(-80px) rotate(720deg) scale(.6)}}.sparkles{position:fixed;font-size:2.5em;animation:sparkleTrail 8s linear infinite;z-index:9999}.sparkles:nth-child(odd){bottom:calc(25% + 100px)}.sparkles:nth-child(2n){bottom:calc(25% + 60px)}@keyframes sparkleTrail{0%{left:-150px;opacity:0;transform:scale(0) rotate(0)}25%{opacity:1;transform:scale(1.2) rotate(180deg)}75%{opacity:1}to{left:calc(100% + 150px);opacity:0;transform:scale(0) rotate(720deg)}}.loading-text{position:fixed;top:40%;left:50%;transform:translate(-50%,-50%);z-index:10001;text-align:center;color:#fff;text-shadow:0 3px 15px rgba(0,0,0,.7)}.loading-text h2{font-size:2.8em;margin-bottom:25px;animation:pulse 3s ease-in-out infinite;font-weight:700}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.85;transform:scale(1.03)}}.loading-dots{display:flex;justify-content:center;gap:15px;margin-top:25px}.dot{width:18px;height:18px;border-radius:50%;animation:bounce 1.5s infinite}.dot-1{background:#dc2626;animation-delay:0s}.dot-2{background:#16a34a;animation-delay:.3s}.dot-3{background:#dc2626;animation-delay:.6s}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-25px)}}