* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: #111; color: #eee; font-family: monospace; display: flex; justify-content: center; align-items: center; height: 100vh; }
.login-box { text-align: center; }
.login-box h2 { margin-bottom: 20px; font-weight: normal; }
.login-box input { display: block; width: 320px; padding: 10px; margin-bottom: 10px; background: #222; border: 1px solid #444; color: #eee; font-family: monospace; font-size: 14px; }
.login-box button { padding: 10px 30px; background: #333; border: 1px solid #555; color: #eee; cursor: pointer; font-family: monospace; }
.login-box button:hover { background: #444; }
#error-msg { color: #f66; margin-top: 10px; min-height: 20px; }