.auth-form-wrapper { position: relative; }
    .auth-overlay {
        position: absolute; top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(255, 255, 255, 0.8);
        z-index: 10;
        display: none; /* Скрыт по умолчанию */
        flex-direction: column; justify-content: center; align-items: center;
        border-radius: 8px;
    }
    .auth-spinner { width: 40px; height: 40px; border: 3px solid #f3f3f3; border-top: 3px solid #005b9f; border-radius: 50%; animation: spin 1s linear infinite; }
    @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }