.slider h3,
.slider h5,
.clients h3 {
    text-shadow: 1px 1px 3px rgba(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, 8));
}
section {
    padding: 20px 0;
}
footer {
    padding: 10px 0;
}