.page-wrapper {
    width: 700px;   
    margin:0 auto;
    overflow: hidden;
    background-color: gray;
    
    
}
*{
    margin: 0;
    padding: 0;
    
}
body{
    background: url(fundosteam.jpg) repeat 100%;
}
.header {
    background: url(steam_Logo.png) no-repeat ;
    position: absolute;
    left: 0;    
    width: 100%;
    
    background-color: #171a21;
    background-position: 30% top;
    min-width: 940px;
    padding-top: 16px;
    color:#b8b6b4;
    padding-bottom: 20 ;
    text-align: center;
    background-size: contain;   
}
.summary {
    color:#b8b6b4;
        
    background-image: url(https://steamcommunity-a.akamaihd.net/public/images/profile/showcase_bg.png);
    
}   
.preamble{
    color:#b8b6b4;
    background-image: url(https://steamcommunity-a.akamaihd.net/public/images/profile/showcase_bg.png);
   
    
}
.explanation{
    color:#b8b6b4;
    background-image: url(https://steamcommunity-a.akamaihd.net/public/images/profile/showcase_bg.png);
}
.participation{
    color:#b8b6b4;
    background-image: url(https://steamcommunity-a.akamaihd.net/public/images/profile/showcase_bg.png);
}
    
.benefits{
    
    color:#b8b6b4;
    background-image: url(https://steamcommunity-a.akamaihd.net/public/images/profile/showcase_bg.png);
  
}
.requirements{
   color:#b8b6b4;
    background-image: url(https://steamcommunity-a.akamaihd.net/public/images/profile/showcase_bg.png);
   
}
.footer{
    color:#b8b6b4;
    background-image: url(https://steamcommunity-a.akamaihd.net/public/images/profile/showcase_bg.png);
   
}
.sidebar{
      color:#b8b6b4;
    background-image: url(https://steamcommunity-a.akamaihd.net/public/images/profile/showcase_bg.png);
}