* {
  border-sizing: border-box;
  margin: 0;
  padding: .3em;
}
  
  body {
padding: 3em;
    background-color: #88A096;
    color:#190933 ;

  }
    
  /*LINKS  */
a {
    color: #190933;
    text-decoration:none ;
}


h1 { font-family: "Limelight", sans-serif;
}

img {
    border: .5em inset #D5ECD4;
}

.logo {
    
   border: 1px solid white; 
  border-radius: 50%;
  width: ;
    
    
    
}

/*MENU*/
nav {
  margin: 0;
  position: fixed;
  top: 0;
  width: 100%;
  background-color:#3A4F417;
  
  transition: background-color 0.5s;
  /* add this new property */
}

/* NEW RULE! */
nav.scrolled {
     background-color: purple;
}

nav a {
  float: left;
  display: block;
  color: #FFFFFF;
  text-align: center;
  padding: 1em;
  text-decoration: none;
  font-size: 1em;
}

nav a:hover {
  background-color: #455d7a;
  font-size: 1em;
}

main {
/*   ADD PADDING INSIDE THE WHOLE 'main' ELEMENT  */
  padding: 1em;
  
/*   SHIFT THE 'main' ELEMENT DOWN, AWAY FROM THE MENU BAR */
  padding-top: 3em;
  
/*   CUSTOMIZE THESE UNTIL YOU LIKE THE WAY THEY LOOK  */
  background-color: #e3e3e3;
  width: 90%;
  margin: auto;
}