/* Animation */
@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(calc(-250px * 7));
    }
}

/* Styling */
.slider {
    background: white;
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.125);
    height: 100px;
    margin: auto;
    overflow: hidden;
    position: relative;
    /* width: 960px; */
}
.slide img {
    filter: grayscale(100%);
}
.slider::before,
.slider::after {
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 1) 0%,
        rgba(255, 255, 255, 0) 100%
    );
    content: "";
    height: 100px;
    position: absolute;
    width: 200px;
    z-index: 2;
}

.slider::after {
    right: 0;
    top: 0;
    transform: rotateZ(180deg);
}

.slider::before {
    left: 0;
    top: 0;
}

.slide-track {
    animation: scroll 40s linear infinite;
    display: flex;
    width: calc(250px * 14);
}

.slide {
    height: 100px;
    width: 250px;
}

.courses_area .bg-kelas {
    transition: background-size 0.3s ease;
    background-size: 100% !important;
}

.courses_area .bg-kelas:hover {
    background-size: 110% !important;
}