.slider {
 overflow: hidden;
 width: 100vw;
 height: 100vh;
 position: fixed;
}
 
.slider .slide {
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 background-size: cover;
 background-attachment: fixed;
 background-position: center center;
}
 
.slider .slide:nth-child(1) {
   background-image: url('//cdn.justdofootball.com/media/bo/dynamics/2025/11/just-do-football-drawnbyluc.svg');   
}