body{font-family:Arial,Helvetica,sans-serif;background:#121212;color:#e0e0e0;margin:0;padding:0}
.container{max-width:900px;margin:20px auto;padding:20px;background:#1e1e1e;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,0.4)}
h1{color:#00d4ff;text-align:center}
h2{color:#00b3cc;margin-top:20px}
input,button{width:100%;padding:10px;margin-top:10px;border-radius:6px;border:none}
input{background:#2a2a2a;color:#e0e0e0}
button{background:#00d4ff;color:#121212;font-weight:bold;cursor:pointer}
button:hover{background:#00b3cc}
#result{margin-top:20px;background:#222;padding:15px;border-radius:6px}