@media(max-width:768px){body{padding-bottom:400px}#register_button{position:fixed;bottom:16px;left:16px;right:16px;width:calc(100% - 32px);border-radius:12px;padding:16px;z-index:1000;box-shadow:0 4px 16px rgba(0,0,0,0.2);text-align:center;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:600}}