#overlay {
    position: fixed;
    display: none;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7); /* fundo escuro */
    z-index: 2;
}

.loader {
    z-index: 290;
    position: fixed;
    width: 220px; /* mais compacto */
    margin-left: -110px; /* metade da largura */
    top: 40%;
    left: 50%;
    text-align: center;
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.15);
    background-color: rgba(255, 255, 255, 0.92); /* fundo branco suave */
    background-image: url('../images/Ajax.gif');
    background-repeat: no-repeat;
    background-position: center 15px;
    background-size: 200px 200px;
    padding-top: 230px; /* espaço pro GIF */
    padding-bottom: 15px;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
    font-size: 13px;
    color: #333; /* texto escuro */
    box-shadow: 0 0 15px rgba(0,0,0,0.3);
}