.slider h3,
.slider h5,
.clients h3,
.portfolio {
    text-shadow:  1px 1px 10px rgba(0, 0, 0, 0.5);
}

.parallax-container {
    height: 25%;
}

.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;
}


.portfolio img {
    filter: drop-shadow(2px)grayscale(10%) saturate(1);
}

.portfolio img:hover {
    filter: blur(1.5px) grayscale(10%)saturate(1);
}