body{font-family:Arial,sans-serif;background:#f4f4f4;margin:0}
.wrap{max-width:700px;margin:40px auto;background:#fff;padding:24px;border-radius:10px;box-shadow:0 4px 12px rgba(0,0,0,.1)}
h1{text-align:center}button{padding:12px 20px;border:none;background:#2563eb;color:#fff;border-radius:6px;cursor:pointer}
ul{padding-left:20px}