@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swap');
@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 {
    text-align: center;
    background-color: rgb(4, 0, 255);
    font-style: italic;
    padding: 20px;
}
header h1 {
    font-family: "Space Mono", monospace;
    font-weight: 700;
    font-style: normal;
}
header span {
    color: yellow;
}
footer{
    background-color: rgb(4, 0, 255);
    padding: 20px;
    display: flex;
    justify-content: space-around;
}
footer h5 {
    font-family: "Space Mono", monospace;
    font-weight: 700;
    font-style: normal;
}
section article{
    margin: 40px;
}
.gros_titre{
    text-align: center;
}
.system-solaire{
    display: flex;
    flex-direction: column;
    align-items: center;
}
.planètes{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    text-align: center;
}
.planètes img {
    height:400px;
    opacity: 0.5;
}
.planètes img:hover{
    opacity: 1;
    transform: scale(1);
    transform: rotate(5deg);
    transition: 0.5s ease-in;
}