<div class="what-img-grid-a"><P class="why-text-block">SUPER TEAM</P></div>

.what-img-grid-a {
  width: 380px;
  height: 250px;
  background-image: url(../img/what-img-a.png);
  transition: 1s all;
  border: 1px solid;
}
.what-img-grid-a:hover .why-text-block {
  opacity: 1;
  width: 380px;
  height: 250px;
  background-image: linear-gradient(
    to top,
    rgba(252, 227, 138, 0.9) 0%,
    rgba(243, 129, 129, 0.9) 100%
  );
  background-size: 100% 100%;
  transition: 1s;
}
.why-text-block {
  display: flex;
  opacity: 0;
  transition: 1s all;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-family: Montserrat;
  font-size: 18px;
  font-weight: 700;
  font-style: normal;
  letter-spacing: normal;
  line-height: normal;
  text-align: center;
  text-transform: uppercase;
}