body { font-family: Arial, sans-serif; background: #f4f8f4; color: #333; }
.container, .login-box { max-width: 600px; margin: auto; background: white; padding: 20px; border-radius: 10px; }
h2 { color: green; }
input, button { display: block; width: 100%; padding: 8px; margin: 10px 0; }
button { background: green; color: white; border: none; cursor: pointer; }
button:hover { background: darkgreen; }
.error { color: red; }