How to set z-index to element in owl-carousel?

Question

Owl Carousel

I want to change the z-index of the arrows so that they come forward on hover against the background of the gradient, but I can't figure out how to do it. In .owl-prev and .owl-next, the arrow is indicated by the element with id='text', but when trying to manipulate the styles of this element, nothing happened. How can I make the arrows still appear on top of the background and change color to white?

Site tempesv0.beget.tech

.reviews {
  text-align: center;
}
.reviews .wrapper {
  padding: 0 30px !important;
}
.reviews .content p {
  margin-bottom: 80px;
}
.reviews-block {
  background-color: #f7fafc;
  display: flex;
  flex-direction: column;
  padding: 30px;
  transition: 0.3s ease-out;
  box-sizing: border-box !important;
  height: 300px;
}
.reviews-block:hover {
  background-color: #ffffff;
  box-shadow: 0px 10px 30px 0px rgba(0, 0, 0, 0.1);
  transition: 0.3s ease-out;
}
.reviews-text {
  text-align: left;
  margin-bottom: 40px !important;
}
.reviews-user {
  display: flex;
  align-items: center;
}
.reviews-user img {
  width: 80px !important;
  height: 80px !important;
  border-radius: 100% !important;
  margin-right: 20px;
}
.reviews-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}
.reviews-info .name {
  font-size: 18px;
  margin-bottom: 10px;
  color: #222222;
}
.reviews-info .inc {
  font-size: 14px;
  font-weight: 300;
  font-family: 'Roboto', 'Arial';
}
.reviews .owl-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100% ;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: -1 !important;
}
.reviews .owl-prev {
  transform: translateX(-70px);
}
.reviews .owl-next {
  transform: translateX(70px);
}
.reviews .owl-prev,
.reviews .owl-next {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  font-size: 25px !important;
  font-weight: 800 !important;
  background-color: #ffffff !important;
  border-radius: 100%;
  border: 1px solid #eeeeee !important;
  width: 40px !important;
  height: 40px !important;
  position: absolute !important;
  color: #333333 !important;
  z-index: 1;
}
.reviews .owl-prev:after,
.reviews .owl-next:after {
  position: absolute;
  content: '';
  border-radius: 100%;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #fd712c 0%, #f21780 100%);
  transition: opacity 0.3s ease-out;
  opacity: 0;
  z-index: 2;
}
.reviews .owl-prev:hover:after,
.reviews .owl-next:hover:after {
  opacity: 1;
}