body {
            /* Fondo oscuro profundo con un sutil gradiente que emula los colores del logo */
            background: radial-gradient(circle at 20% 30%, rgba(220, 53, 69, 0.15), transparent 40%),
                        radial-gradient(circle at 80% 70%, rgba(13, 110, 253, 0.15), transparent 40%),
                        #0d0f12;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        .login-card {
            background: rgba(20, 24, 30, 0.85);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 2.5rem;
            width: 100%;
            max-width: 420px;
            /* Sombra doble: Neón Azul a la derecha, Neón Rojo a la izquierda */
            box-shadow: -5px 5px 20px rgba(220, 53, 69, 0.2), 
                        5px -5px 20px rgba(13, 110, 253, 0.2);
        }

        .brand-title {
            font-weight: 800;
            letter-spacing: 2px;
            text-shadow: 0 0 10px rgba(255,255,255,0.2);
        }
        
        .brand-subtitle {
            color: #dc3545; /* Rojo */
            font-weight: 700;
            letter-spacing: 4px;
        }

        .form-control {
            background-color: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #ffffff;
            border-radius: 8px;
            padding: 0.75rem 1rem;
        }

        .form-control:focus {
            background-color: rgba(255, 255, 255, 0.08);
            border-color: #0d6efd; /* Borde azul al enfocar */
            box-shadow: 0 0 8px rgba(13, 110, 253, 0.5);
            color: #ffffff;
        }

        /* Botón personalizado mitad Rojo, mitad Azul como el cuervo */
        .btn-gem {
            background: linear-gradient(90deg, #dc3545 0%, #0d6efd 100%);
            border: none;
            color: white;
            font-weight: 700;
            padding: 0.75rem;
            border-radius: 8px;
            letter-spacing: 1px;
            transition: all 0.3s ease;
        }

        .btn-gem:hover {
            opacity: 0.9;
            box-shadow: 0 0 15px rgba(13, 110, 253, 0.6);
            transform: translateY(-1px);
        }

        .footer-text {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1rem;
            font-size: 0.9rem;
            letter-spacing: 2px;
            color: #a0a6b0;
        }