header{
  background:#BBBBBB;
}
body{
  background:lightgray;
}
.caixa{
  position: relative;
  width: 940px;
  margin: 0 auto;
}

nav{
  position: absolute;
  top: 110px;
  right: 0;
}
nav li{
  display: inline;
  margin: 0 0 0 15px;
}

#sf3{
  width:60%;
}
.sus{
  background:#BBBBBB;
}
footer{
  text-align: center;
  background: #000000;
  padding: 40px 0;
}

.copyright{
  color: #FFFFFF;
  font-size: 13px;
  margin: 20px 0 0;
}
h4{
  font-size: 20px;
}
.sus2{
  background: #BBBBBB;
  font-size:20px;
}
h6{
  font-size: 20px;
}
.sus3{
  background: #BBBBBB;
  font-size:20px;
}