.coupon-section.hidden{display:none}.cup.selected{transform:translateY(-30px) scale(1.1)}.firework{position:absolute;bottom:0;width:4px;height:20px;background-color:red;animation:shoot 1s ease-in,explode .5s ease-out 1s}.coupon-section.visible{display:block;opacity:1;height:auto;padding:40px}.validity-timer{position:fixed;bottom:20px;right:20px;background-color:rgba(0,0,0,.8);color:white;padding:10px 20px;border-radius:5px;font-size:14px;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,.2);transition:opacity .3s ease;display:none}