body {
    margin: 0 auto;
    padding: 0;
    background-color: #4d2060;
    color: #ffab00;
}

a {
    color: #5ab100;
    text-decoration: none;
    font-weight: bold;
}

header {
    margin: 0 auto;
    padding: 1rem 0;
    perspective: 100px;
    perspective-origin: 50% 100%;
    text-align: center;
    position: static;
    width: 800px;
}
h1 {
    text-align: center;
    font-size: 400%;
    font-family: monospace;
    color: #5ab100;
    background: bottom center url('sunset.svg') no-repeat;
    padding-bottom: 100px;
    vertical-align: top;
    transform: translate3d(0px, 0px, 0px);
    perspective: 200px;
    perspective-origin: 50% 100%;
}

h1:before {
    display: inline-block;
    content: url('island_l.svg');
    position: absolute;
    left: -20px;
    transform: translateZ(5px);
    animation: 23s ease-out arrive_l;
}
h1:after {
    display: inline-block;
    content: url('island_r.svg');
    position: absolute;
    right: 60px;
    top: 20px;
    transform: translateZ(25px);
    animation: 23s ease-out arrive_r;
}
@keyframes arrive_l {
    from {
        transform: translateZ(-100px);
    }
    to {
        transform: translateZ(5px);
    }
}
@keyframes arrive_r {
    from {
        transform: translateZ(-50px);
    }
    to {
        transform: translateZ(25px);
    }
}

main:before {
    float: left;
    width: 233px;
    height: 260px;
    content: url('ship.svg');
    margin: 0 1rem 4rem;
}

main {
    max-width: 43em;
    margin: 2rem auto;
    padding: 0.5rem;
    background-color: #4d2060;
    border-radius: 1rem;
}

ul {
    list-style-type: none;
}

.videos {
    display: inline-block;
    margin: 2rem 0;
    padding: 0.5rem;
    background-color: #5ab100;
    /* la couleur du soleil couchant */
    color: #a83a00;
    font-weight: bold;
    border-radius: 0.5rem;
}

footer {
    clear: both;
    margin: 4rem auto 1rem;
}

footer h2 {
    text-align: center;
    font-size: 100%;
}
footer ul {
    margin: 0;
    padding: 0;
    list-style-type: none;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-around;
}
footer li {
    margin: 0.3rem;
}