body {
  background-color: #f8f8ff;
  color: #5959ff;
  font-family: "Comic Sans MS", sans-serif;
}

.header {
  position: relative;

  width: 90%;
  max-width: 1000px;

  margin: 2% auto;
}

.header img {
  display: block; 
  width: 100%;
  margin: 0 auto;
}

.nav {
  position: relative;
  
  width: 90%;
  max-width: 1000px;
    
  margin: 2% auto;
}

.nav img {
  display: block;
  width: 100%;
  margin: 0 auto;
}

.nav a {
  position: absolute;
  top: 0;
  bottom: 0;
  height: 100%;
}

.home       { left: 2%;  width: 12%; }
.world      { left: 19%; width: 12%; }
.operations { left: 36%; width: 21%; }
.storage    { left: 62%; width: 17%; }
.profile    { left: 84%; width: 14%; }

.main {
  position: relative;

  width: 90%;
  max-width: 1000px;

  margin: 2% auto;
}

.main img {
  display: block;
  width: 100%;
  margin: 0 auto;
}

.footer {
  position: relative;
  
  width: 75%;
  max-width: 750px;
  
  margin: 2% auto;
}

.footer img {
  display: block;
  width: 100%;
  margin: 0 auto;
}