@import url('https://fonts.googleapis.com/css2?family=Ubuntu+Sans:ital,wght@0,100..800;1,100..800&display=swap');
* {
  box-sizing:border-box;
  margin:0;
  font-family: 'Ubuntu Sans', sans-serif;
}

header, footer {
  background-color:orange;
  padding:3%;
}
main {
  }
section {
  background-color:whitesmoke;
  padding:3%;
}
article {
  border-top: 2px solid orange;
  margin-top:5%;
  }
#topic1 h3 {color:aqua;}

nav {
  text-align:center;
  margin:.8% 0 1% 0;
  padding:0;
}
nav a {
  background-color:black;
  border:2px solid black;
  border-radius:5px 5px 0 0; 
  color:white;
  font-size:1.1em;
  font-weight:bold;
  margin:0;
  padding: 3px 20px 5px 20px;
  text-decoration:none;
}
nav a:hover {
  background-color:white;
  color:black;
}


p, li, h2, h3 {margin-bottom:2%;}