html,body {
  padding: 0;
  margin:0;
  clear:both;
  background-color: #404040;
  font-family: arial;
  font-size: 14px;
}

.row { margin-bottom: 8px; }
.row::after { content:' ';display:block;clear:both;height:0px;width:100%; }

body { background-color:#888; }
body > div {
  width:800px;
  margin:64px auto 0px auto;
  background-color:#fff;
  position:relative;
}
body > div > a {
  display:block;
  text-align:center;
  width: calc( 100% - 32px );
  padding: 16px;
  color: #666;
  font-size: 24px;
  text-decoration:none;
}
form { 
  width: 40%;
  margin: 0px auto 0px auto; 
  padding: 16px; line-height: 32px; 
}
form span { display:block; float:left; width: 96px; }

header {
  max-width: 800px;
  min-width: 400px;
  
  margin: 0px auto 0px auto;
  background-color: #fff;
  padding: 16px 32px 8px 32px;
}

header:nth-child(2){
  padding: 16px 32px 0px 32px;
}

header h1 {
  margin:0;
}

header nav a {
  text-decoration:none;
  color: #400;
  margin-right: 16px;
}