.slider {
    width: 80%;
    overflow: hidden visible;
    margin: 40px auto;
    border: 0px solid #333;
    border-radius: 10px;
}

.slides {
    display: flex; 
}

.slides img {
   min-width: 100%;
   transition: filter 0.4s ease;
}



.slider:hover {
    box-shadow: 0 35px 45px rgba(0,0,0,.4);
}


.slider:hover .slides img {
    filter: brightness(1.1) contrast(1.1);
   
}

        /*pagination*/
.slider::after {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    background: #ccc;
    border-radius: 50%;
    left: 40%;
    box-shadow: 20px 0 #ccc, 40px 0 #ccc, 60px 0 #ccc, 80px 0 #ccc;
    position: absolute;
    margin-top: 20px;
}



.slider:hover::after {
    animation-play-state: paused;
}

.prev-btn {
    left: 4px;
}

.next-btn {
    right: 4px;
}

.prev-btn, .next-btn {
    position: absolute;
    top: 40%;
    background: rgb(0, 0, 0);
    border: none;
    border-radius: 30px;
    width: 40px;
    height: 40px;
    color: rgb(93, 245, 240);
    font-size: 19px;
}

.prev-btn:hover, .next-btn:hover {
    color: red;
}