body 
    { font-family: “Roboto”, ‘Helvetica Neue’, Helvetica, Arial, sans-serif; font-weight: 400;
    font-style: normal; }
  h1
    { font-family: “Roboto”,‘Helvetica Neue’, Helvetica, Arial, sans-serif; font-weight: 900; font-style: normal; }
footer p {text-align: center;}

#logo {
    width: 70px;
    height: auto;
   }    

header {
    background-color: #800C0CA7; /* fill*/
    /*rgba (255,255,255,0,5) => 0,5 semitransparent*/

    border:1px solid #000;

    height: 100px;

    padding: 30px;

    font-size: 50px;
    font-weight: 900px;
    font-style: normal;

}    

footer {
  background-color: #800C0CA7; /* fill*/
  /*rgba (255,255,255,0,5) => 0,5 semitransparent*/

  border:1px solid #000;

  height: 55px;

  padding: 15px;
}

body {
  font-family: "Roboto", sans-serif;
  font-weight: 400;
  font-style: normal;
  margin: 0; 
  padding: 0;
  background-color: #E16C6C47;
  }
  nav ul{ list-style-type: none;}
  nav ul li {
    display: inline;
    margin-right: 16px;
  }
  a 
  {text-decoration: none;}
  main 
  { 
    margin-left: 36px;
  }
 header img 
 { height: 100px;}
 header h1 
 { display: inline;
font-size:100%;
  }
.thumbnails 
{ 
  display: flex;
}

header span 
{ position: relative;
top: -21px
}
section .thumbnails { padding: 50px;}