body { font-family: Arial, sans-serif; background-color: #121212; color: #f0f0f0; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; }
.login-box { background-color: #1e1e1e; padding: 30px; border-radius: 10px; box-shadow: 0 0 15px rgba(255, 255, 255, 0.05); width: 300px; }
h2 { text-align: center; margin-bottom: 20px; color: #ffffff; }
input[type="text"], input[type="password"] { width: 100%; padding: 10px; margin-bottom: 15px; border: 1px solid #444; border-radius: 5px; background-color: #2c2c2c; color: #fff; }
button { width: 100%; padding: 10px; background-color: #333; color: #fff; border: 1px solid #555; border-radius: 5px; cursor: pointer; }
button:hover { background-color: #444; }
.error { color: #ff4d4d; text-align: center; margin-top: 10px; }