*  {
     /* border: solid black 5px;*/
  }

body {
    text-align: center;
    background-color:darkgray;


}

  header {
      max-width: 90%;
      margin: 0 auto;
      padding:10px;

  }


  header hover:button {/*isto está funcionando?*/
      margin:30px;
  }

  main {
      /* background-color:magenta;
      height: 100vh;*/
      border-radius:4px;
       background-color:whitesmoke;
      max-width: 90%;
      margin: 0 auto;
  }

aside {
   /* background-color:green;
      border-color:aqua;*/
}

  aside p {
    /*   border: solid 5px yellow;
     border-size: 5px;
      border-color: yellow;
      font-size: 60px; */
  }
  footer {
      border-top: solid gray 1px;
       height:30vh;
      background-color:;

  }