HTML5 Template - CSS3 Style

HTML5 Code:

Example: template6.html

    
<!DOCTYPE html>

<html lang="de"><head>

<meta charset="utf-8" />

<meta name="viewport" content="width=device-width,
 initial-scale=1.0">

<link rel="stylesheet" href="template6.css" />

</head>

<body>

<header>

 <h1 class="mitte">Header</h1> 

</header>

 <div class="flex-container">

 <nav class="col-3"><h1 class="mitte">
Navigation</h1></nav>

 <article class="col-45"><h1 class="mitte">
Article</h1> </article> 

 <aside class="col-45"><h1 class="mitte">
Aside</h1></aside> 
  
 </div> <!--flex-container -->

<footer>

  <h1 class="mitte">Footer</h1> 
 
</footer>

</body>

</html>

Styles: template6.css


* {
  box-sizing: border-box;
}  
body, html {
    max-width: 1080px;
    margin: 3px auto;
    background:#fff;
    font-family: Arial, Helvetica, sans-serif;
    font-size:1em;
    color:#000000;
    line-height:1.3em;
    border:0px solid #ff0000;
    border-radius:6px;
}

.flex-container {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: fles-start;
  justify-content: space-between;
  margin: px;
    }
.flex-container > div {
  padding:0px;
  font-size: 1em;
}
header{    
     border:1px solid #cccccc;
     border-radius:6px; /* CSS3 */ 
     padding:5px 10px;
     background:#ffffef;
}
nav, article, aside{
    float:right;
    text-align:left;
    background:#ffefff;
    color:#333333;
    border-radius:6px; /* CSS3 */ 
    border:1px solid #cccccc;
    border-radius:6px; /* CSS3 */ 
    padding:5px 10px; 
}

footer{
    border:1px solid #cccccc;
    border-radius:6px; /* CSS3 */ 
    padding:5px 10px;
    background-color:#ffffef;
    color:#333333;
    border-radius:6px; /* CSS3 */ 
}
.mitte{text-align:center;}
/* ###################################### */
.col-1 {width: 8.33%;}
.col-2 {width: 16.66%;}
.col-3 {width: 25%;}
.col-4 {width: 33.33%;}
.col-5 {width: 41.66%;}
.col-45 {width: 37.5%;}
.col-6 {width: 50%;}
.col-7 {width: 58.33%;}
.col-8 {width: 66.66%;}
.col-9 {width: 75%;}
.col-10 {width: 83.33%;}
.col-11 {width: 91.66%;}
.col-12 {width: 100%;}

@media only screen and (max-width: 768px) {
  /* For mobile phones: */
   [class*="col-"] {
    width: 100%;
  }
}

Template with 3 Columns!

Google Chrome — HTML5 - Template for Tablett, Mobile oder Desktop