* { box-sizing: border-box; }


nav{
  background-color: #003e65; 
  position: fixed; 
  left: 0;
  top: 0;
  width: 100%;
  height:auto;
  text-align:center;
}

nav h1{ text-align: center; 
    font-size: 40px;
    color: #ffffff;
}

menu{
    padding-left: 0;
    display: inline-grid;
    grid-template-columns: 1fr 1fr 1fr 1fr; 
    max-width: 100%;
    height: auto;
    margin: 0 auto;
    background-color: #0071b7;
  
}

menu a{ 
    text-align:center;
    color: #ffffff;
    text-decoration: none; 
    padding: 5px;
    border: solid 1px #eee;
    font-family: sans-serif;
    font-size: calc( 0.6em + 1vw );
}
section{ padding-top: 150px }
@media (min-width: 550px){
  menu a{ padding: 20px; 
    font-size: calc( 1em + 1vw ); }
}
h1 {
  text-align: center;
}
h2 {
  text-align: center;
  font-size: 3em;
  font-family: sans-serif
}
#history{
  padding-top: 155px;
  min-height: 100vh;
  align-content: center;
}

section{
  max-width: 985px;
  width: 100%;
  min-height: 100vh;
  align-content: center;
  margin: auto;
}

.box{
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #ddd;
  border-radius: 5px;
  width: 100%;
  min-height: 50px;
  padding: 5px;
}

#quad{
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  width: 550px;
  margin: 25px auto;
  grid-gap: 12px;
}

@media ( max-width: 480px){
  #quad{
    grid-template-columns: auto;
    grid-template-rows: auto;
  }
  #history{
    max-width: 960px;
  }
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
  
}