body{font-family:Arial;background:#f6f7fb;margin:0}
.wrap{max-width:700px;margin:100px auto;text-align:center}
input{width:100%;padding:18px;border-radius:50px;border:1px solid #ddd;font-size:18px}
.card{background:#fff;padding:15px;margin-top:15px;border-radius:12px;box-shadow:0 5px 15px rgba(0,0,0,0.05)}
button{background:#16a34a;color:#fff;border:none;padding:10px 15px;border-radius:8px;cursor:pointer}
button.copied{background:#15803d}