body { background-color: #121212; color: #e0e0e0; font-family: Arial, sans-serif; } h1 { color: #00aaff; font-weight: bold; } .card { border: 1px solid #444; } .btn-primary { background-color: #0077cc; border: none; } .btn-primary:hover { background-color: #005fa3; }