@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&family=Space+Mono:ital,wght@0,400;0,700;1,400;1,700&display=swap');
html, body {
    margin: 0px;
    background-color: black;
    font-family: "Roboto", sans-serif;
    color: white;
}
header {
    background-color: blue;
    text-align: center;
    padding: 20px;
}
header p {
    font-style: italic;
}
header h1 {
    font-family: "Space Mono", monospace;
}
span {
    color: yellow;
}
footer {
    background-color: blue;
    padding: 20px;
    display: flex;
    justify-content: space-around;
}
footer h6 {
    font-family: "Space Mono", monospace;
}
section, article {
    margin: 40px;
}
.TITRE {
    text-align: center;
}
.System {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.Planetes {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    text-align: center;
}
article img {
    width: 400px;
    opacity: 0.5;
    transition: ease 0.5s;
}
article img:hover {
    opacity: 1;
    transform: scale(1.1);
    transform: rotate(5deg);
    transition: ease 0.5s;
}