body{font-family:sans-serif;background:#eef2f7}
.container{padding:15px;max-width:500px;margin:auto}
.card{background:#fff;padding:20px;margin:100px auto;width:260px;border-radius:12px;text-align:center}
.user-card{background:#fff;padding:12px;margin:8px 0;border-radius:10px}
button{padding:10px;width:100%;margin-top:5px;border:none;border-radius:8px;background:#007bff;color:#fff}
.popup{display:none;position:fixed;width:100%;height:100%;background:rgba(0,0,0,.5)}
.popup-content{background:#fff;margin:100px auto;padding:20px;width:300px;border-radius:10px;position:relative}
.close-btn{position:absolute;top:10px;right:10px;cursor:pointer}
.amount-red{color:#ff4d4f;font-weight:bold}