body { font-family: sans-serif; display: flex; justify-content: center; padding-top: 50px; background-color: #f4f4f9; }
.login-container { background: white; padding: 30px; border-radius: 8px; box-shadow: 0 0 10px rgba(0,0,0,0.1); }
input { display: block; margin-bottom: 10px; padding: 8px; width: 100%; box-sizing: border-box;}
button { width: 100%; padding: 10px; background: #007bff; color: white; border: none; cursor: pointer; }
.error { color: red; font-size: 0.9em; }