.main-menu__logo img {
  max-height: 70px;   /* adjust to fit your header */
  width: auto;        /* keeps the proportions */
  max-width: 100%;
  display: block;
  object-fit: contain;
}

@media (max-width: 1199px) {
  .main-menu__logo img { max-height: 60px; }
}
@media (max-width: 767px) {
  .main-menu__logo img { max-height: 45px; }
}

.footer-widget__logo img {
  max-height: 70px !important;
  height: auto !important;
  width: auto !important;
  max-width: 100% !important;
  display: block;
  object-fit: contain;
}

@media (max-width: 1199px) {
  .site-footer .footer-widget__logo img,
  .footer-widget__about .footer-widget__logo img { max-height: 60px !important; }
}
@media (max-width: 767px) {
  .site-footer .footer-widget__logo img,
  .footer-widget__about .footer-widget__logo img { max-height: 45px !important; }
}