body{margin:0;font-family:Arial;background:#0d0d0d;color:white;text-align:center;}
header{background:#222;padding:20px;font-size:26px;font-weight:bold;color:#ffcc00;cursor:pointer;}
input,select{padding:10px;margin:10px;width:200px;}
button{padding:10px 20px;margin:10px;}
.hide{display:none;}
.balance{font-size:18px;margin:10px;}
.banner-container{width:90%;max-width:500px;height:150px;margin:20px auto;position:relative;overflow:hidden;border-radius:10px;background:#111;display:flex;align-items:center;justify-content:center;}
.banner-slide{position:absolute;width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:bold;color:#ffcc00;transition:opacity 1s ease-in-out;opacity:0;}
.banner-slide.active{opacity:1;}
.game-area{margin:20px auto;width:300px;height:300px;border:2px solid #ffcc00;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:bold;}