.login-card {
    max-width: 400px;
    margin: auto;
    margin-top: 80px;
    /* Fondo transparente con efecto vidrio */
    background: rgba(33,33,33,0.55) !important;
    backdrop-filter: blur(8px);
    /* Extras visuales */
    border-radius: 5px;
    box-shadow: 0 14px 20px rgba(255,255,255,0.2);
}