body {
  font-family: Tahoma, Verdana, sans-serif;
  font-size: 1em;
  color: #FFF;
  max-width:60em;
  margin:1em auto;
  background: #233442;
}

header {
  position:relative;
  color:#000;
  background: #CAE1FF;
  padding: .6em;
  padding-left: 8em;
  min-height: 8em;
}

header img {
  position:absolute;
  top:-10px;
  left: -25px;
  z-index:1;
  /* 1/basic fontsize*pixel = em */
  width: 11.8125em;
  height: 11.375em;
}

h1 {
  text-align:center;
  font-size: 4em;
  margin: 0;
}

nav {
  float:left;
  width:7.0em;
  list-style-type: none;
  padding: 2em 0 1em 0.2em;
  margin:.3em;
  z-index:0;
  background:#4A708B;
  border-top-left-radius:.5em;
  border-bottom-left-radius:.5em;
}

nav li {
  min-width:7em;
  padding:0;
  margin: .1em 0 .1em 0;
}

main {
  display: block; /* noch für IE 8-11 nötig */	
  margin:.5em 0;
  margin-left: 7.3em;
  background: #CAE1FF;
  padding:.1em .5em;
  min-height:15em;
  color:#000000;
}

footer {
  background: #CAE1FF;
  color: #000000;
  margin:.5em 0;
  text-align: right;
  font-size:.8em;
  padding:.5em;
}

a {
  text-decoration: none;
  color: #000000;
  font-weight: bold;
}

nav a {
  display:block;
  color: #000;
  text-decoration: none;
  background: #8DB6CD;
  padding:.5em .4em;
  border-top-left-radius: .5em;
  border-bottom-left-radius: .5em;
  margin: 0 0 0 0;
}

nav a:focus {
  background: #CAE1FF;
  color: #000;
  
}

nav a:hover {
  background: #CAE1FF;
  color: #000;
}

nav a:active, a.active {
  background: #CAE1FF;
  color: #000;
}

table {
  width: 100%;
  
}
th {
  background: #203F58;
  color: #BAB58C;
  font-weight: normal;
}

footer span {
  display:block;
}

<style>
      .left    { text-align: left; }
      .right   { text-align: right; }
      .center  { text-align: center; }
      .justify { text-align: justify; }
    </style