.slider h5,
.slider h3,
.client h3 {
  text-shadow: 3px 3px 5px black;
}
.parallax-container {
  height: 20%;
}
.parallax img {
  filter: grayscale(1);
  opacity: 0.5 !important;
}
.client img {
  max-width: 150px;
  filter: drop-shadow(1px 1px 1px black);
}
section,
footer {
  padding: 20px 0;
}
@media (max-width: 768px) {
  .slider,
  .slides {
    height: 450px !important;
  }
}
@media (max-width: 600px) {
  .slider,
  .slides {
    height: 350px !important;
  }
}