body {
    margin:0;
    width:100vw;
    height:100vh;
    display: grid;
    grid-template-rows: 0.1fr 1fr 1fr;
    grid-template-columns: 1fr 1fr;
}

h1 {
    grid-column: 1 / 3;
    text-align: center;
}

section {
    display: grid;
    grid-template-rows: 0.1fr 1fr;
    padding:5px;
}

section h2 {
    text-align: center;
}

section {
    border-top: 1px solid black;
}

section:first-of-type, section:nth-of-type(3) {
    border-right: 1px solid black;
}


/* EXERCICE 1 */

#ex1 div {
    width: 15vh;
    height: 15vh;
    background-color: red;
    opacity: 0;
}


/* EXERCICE 2 */
#ex2 div {
    width: 15vh;
    height: 15vh;
    background: linear-gradient(red, blue);
    border-radius: 50%;
    
}


/* EXERCICE 3 */
#ex3 div {
    width: 15vh;
    height: 15vh;
    background: linear-gradient(red, blue);
    border-radius: 50%;
}


/* EXERCICE 4 */
#ex4 div {
    width: 15vh;
    height: 15vh;
    background: linear-gradient(red, blue);
    border-radius: 50%;
}

/* EXERCICE 1 */
#ex1 div {
    animation: 3s appear forwards;
    animation-delay: 2s;
}

@keyframes appear {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* EXERCICE 2 */
#ex2 div {
    animation: 3s move forwards;
    animation-delay: 2s;
}

@keyframes move {
    from {
        transform: translateX(0);
    }

    to{
        transform: translateX(15vh);
    }
}

/* EXERCICE 3 */
#ex3 div {
    animation: 3s roll forwards;
    animation-delay: 2s;
}

@keyframes roll {
    from {
        transform: translateX(0) rotate(0);
    }

    to{
        transform: translateX(15vh) rotate(180deg) ;
    }
}

/* EXERCICE 4 */
#ex4 div {
    animation: 1.5s bounce forwards;
    animation-delay: 3s;
}

@keyframes bounce {
    0% {
        transform: translateX(0) translateY(0) rotate(0);
    }

    25%{
        transform: translateY(15vh) translateX(10vh)  rotate(45deg);
    }

    50% {
        transform:  translateY(8vh) translateX(18vh) rotate(90deg);
    }

    75% {
        transform:  translateY(15vh) translateX(24vh) rotate(135deg);
    }

    100% {
        transform:  translateY(15vh) translateX(28vh) rotate(180deg);
    }
}