.winter-modal{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:10000;display:flex;align-items:center;justify-content:center}
.winter-box{background:#fff;padding:30px;border-radius:12px;text-align:center;max-width:420px}
.winter-box button{margin-top:20px;padding:10px 25px;border:none;background:#2563eb;color:#fff;border-radius:6px;cursor:pointer}