.walet-form-bg {
  position: relative;
  padding: 5px 0 140px;
    width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);

  /* ⬇️ ВОТ СЮДА ДОБАВЛЯЕТСЯ КАРТИНКА */
  background-image: url("/upload/fotter.jpg");

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* затемнение фона */
.walet-form-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(0,0,0,0.55),
    rgba(0,0,0,0.7)
  );
  z-index: 0;
}

/* форма поверх картинки */
.walet-glass-form {
  position: relative;
  z-index: 1;
}

.walet-form-bg {
  margin-top: 160px;
}