body { background:#f4f6f8; font-family:Arial; }
.container { width:600px; margin:50px auto; background:#fff; padding:25px; border-radius:10px; box-shadow:0 0 15px rgba(0,0,0,.1); }
h1 { text-align:center; color:#2ecc71; }
label { display:block; margin-top:10px; }
input, button { width:100%; padding:10px; margin-top:5px; box-sizing:border-box; }
button { background:#2ecc71; color:#fff; border:none; margin-top:20px; cursor:pointer; border-radius:5px; }