button {
    /* display */
    display: block;
    height: 46%;
    width: 100%;
    box-sizing: border-box;
    /* design */
    font-size: 3rem; 
    font-family: "Agrandir";
    background-color: white;
    color: black;
    /* animation */
    transition-duration: 1000ms;
    transition-timing-function: cubic-bezier(0.61,-0.32, 0.17, 1.73);
    border: 4px solid black
}
button:hover {
    font-size: 4rem;  
    background-color: black;
    color: white;
    cursor: grab;
}
.divmargin {
    height: 8%;
}
@media screen and (max-width: 860px) {
    button {
        font-size: 2rem;
    }
    button:hover {
        font-size: 3rem;
    }
}