*{
    box-sizing: border-box;
}
body {
    margin: 0;
    padding: 0;
}
.container-site-art{
height: 100vh;
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
  .img-site-art {
    width: 90%;
  }
}