.footer_index {
    position: fixed;
    width: 100%;
    height: 30px;  /* ou 2rem, se quiser */
    bottom: 0;
    background-color: #f1f1f1;
    padding: 0px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

 .footer_text{

     left:0%;

 }

main {
    padding-top: 26px; /* ajuste conforme a altura da sua navbar */
}