.slider h3,
.slider h5,
.clients h3 {
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.parallax-container {
  height: 20%;
}

.parallax img {
  filter: grayscale(1);
  opacity: 0.5 !important;
}

.clients img {
  max-width: 150px;
  filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.8));
}

section,
footer {
  padding: 20px 0;
}