.background-image{background-image:url(https://picsum.photos/1920/1080);background-size:cover;background-repeat:no-repeat;background-attachment:fixed}.custom-button{background-color:black;color:yellow;padding:10px 20px;border-radius:5px;border:2px solid blue;cursor:pointer;font-size:16px;transition:background-color .3s,color .3s}.custom-button:hover{background-color:blue;color:black}