header {background: #ff4e94;padding: 8rem;}

main {background: #6700ff; width: 100%;}

section {background: #9249ff; 90%}

article {background: #f2dc57; padding: 28rem 7rem 6rem 1rem;}

aside {background: #ff9933; padding: 7rem;}

footer {background: #db3600; padding: 15rem;}

article.uno {width: 75%;} 

.contenedor {display: flex; width: 80%;}

article {width: 33%; margin:2rem;}