body { font-family: Arial, sans-serif; display: flex; justify-content: center; align-items: center; min-height: 100vh; background: #f0f2f5; margin: 0; }
.container { background: #fff; padding: 2em; border-radius: 10px; box-shadow: 0 4px 10px rgba(0,0,0,0.1); width: 100%; max-width: 400px; }
h2 { text-align: center; margin-bottom: 1em; }
form { display: flex; flex-direction: column; }
label { margin: 0.5em 0 0.2em; }
input { padding: 0.5em; margin-bottom: 1em; border-radius: 5px; border: 1px solid #ccc; }
button { padding: 0.7em; background: #007bff; color: #fff; border: none; border-radius: 5px; cursor: pointer; }
button:hover { background: #0056b3; }
.toggle { text-align: center; margin-top: 1em; cursor: pointer; color: #007bff; }
.toggle:hover { text-decoration: underline; }
#message { color: red; text-align: center; margin-top: 0.5em; }