html {
  font-size: 10px; /* px means "pixels": the base font size is now 10 pixels high  */
/*  font-family: 'Roboto', sans-serif; /* this should be the rest of the output you got from Google fonts */
}

body {
  color: black;
  font-family: Arial, serif;
  padding: 0px;
  width: fit-content(60%);
  margin: auto;
}


/* navigation menu*/
ul {
  background-color: lightgrey;
  margin: auto;
  top: 0;
  display: flex;
  list-style-type: none;
  justify-content: space-evenly;
  width: 80%;
}

ul > a > li {
  padding: 10px;
  margin: 1vw;
  background-color;
  white-space: nowrap;
  border-radius: 2px;
}

li:hover {
  background-color: lightslategray;
}

ul a {
  text-decoration: none;
  color: black;
  font-weight: bold;
  font-size: 1.5em;
  }


/*welcome*/
header {
  padding-top: 10px; 
  text-align: center;
}

.language {
  background-color: lightgrey;
  width: 60%;
  max-width: 400px;
  margin: auto;
  font-weight: bold;
  font-size: 2em;
  padding: 1.5vw;
  display: flex;
  justify-content: space-around;
}

.flag:hover {
 background-color: #fff;
}


/* intro */
.intro {
  text-align: center;
  font-weight: bold;
  font-size: 2em;
}

/* footer */
footer {
  padding: 10px;
  background-color: lightgrey;
  position: sticky;
  margin: auto;
  width: 80%;
}

footer > p {
  text-align: center;
  font-size: 1.5em;
  font-weight: bold;
  margin: 0;
}


/* main area */
main {
  display: flex;
  flex-direction: row;
  width: 80%;
  margin: auto;
  }

main.welcome {
  flex-direction: column;
  width: 80%;
}

aside{
  display: flex;
  flex-direction: column;
  max-width: 50%;
}

article{
  display: flex;
  flex-direction: column;
  font-size: 1.5em;
  margin: 2%;
  max-width: 50%;
}


article > h1{
    font-size: 2em;
    margin-bottom: 0.3em;
}
article > section > h2,h3{
    margin-bottom: 0px;
}

article > section > p{
    margin-top: 0.3em;
}

section.gallery {
    margin-bottom: 1em;
}

section > a > img{
  width: 200px;
}

section.videos {
    overflow: hidden;
    padding-bottom:56.25%;
    position:relative;
    height:0;
} 

section.videos iframe {
    left:0;
    top:0;
    height:100%;
    width:100%;
    position:absolute;
}