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              <!--[if lt IE 10]> 
<style>
h1 {
    line-height: 100px;
    width: 100%;
}
.grid {
    margin: 0 auto;
    padding: 50px 100px 0px 100px;
    max-width: 1200px;
}
.first-line {
    height: 20px;
    width: 100%;
    margin-top: 20px;
    background-color: #000;
}
.main {
    cursor: pointer;
    width: 100%;
    margin: 20px 0;
}
.mainimg {
    background-size: cover;
    height: 220px;
    width: 100%;
    margin-bottom: 20px;
}
h2 {
    font-size: 40.5px;
    line-height: 31.5px;
    margin-bottom: 13px;
}
.main > p {
    width: 80%;
}
.mainhr {
    height: 2px;
    background-color: #000;
    margin-top: 20px;
    width: 20px;
}
.side1 {
    width: 100%; /* ie8 */
    width: calc(33.333% - 13.333px);
    margin-right: 20px;
    float: left;
}
.side2 {
    width: 100%; /* ie8 */
    width: calc(33.333% - 13.333px);
    margin-right: 20px;
    float: left;
}
.side3 {
    width: 100%; /* ie8 */
    width: calc(33.333% - 13.333px);
    float: left;
}
.side1,
.side2,
.side3 {
    margin-bottom: 20px;
}
.morehr {
    height: 2px;
    width: 100%;
    background-color: #000;
    margin-top: 20px;
    clear: left;
}
h4 {
    width: 100%;
    margin-top: 20px;
    margin-bottom: 20px;
}
.ex1 {
    width: 100%; /* ie8 */
    width: calc(33.333% - 13.333px);
    margin-right: 20px;
    float: left;
}
.ex2 {
    width: 100%; /* ie8 */
    width: calc(33.333% - 13.333px);
    margin-right: 20px;
    float: left;
}
.ex3 {
    width: 100%; /* ie8 */
    width: calc(33.333% - 13.333px);
    float: left;
}
.ex1,
.ex2,
.ex3 {
    margin-bottom: 20px;
}
.eximg1,
.eximg2,
.eximg3 {
    height: 220px;
    background-size: cover;
    margin-bottom: 20px;
}
.footer {
    display: block;
    height: 100px;
    width: 100%;
    background-color: #000000;
    clear: both;
}
footer ul {
    list-style: none;
    width: 100%;
}
footer li {
    width: 25%;
    float: left;
}
footer a {
    color: #fff;
    text-decoration: none;
    line-height: 100px;
    text-align: center;
    width: 100%;
    display: block;
    font-family: oswald, helvetica, sans-serif;
    font-weight: normal;
    font-size: 12px;
}
@media all and (max-width: 1000px) {
    .grid {
        padding: 50px 50px 0px 50px;
    }
}
@media all and (max-width: 620px) {
    .grid {
        padding: 25px 20px 0px 20px;
    }
    h1 {
        font-size: 60.75px;
        line-height: 1.3;
    }
    .side1 {
        width: 100%;
        margin-right: 0;
    }
    .side2 {
        width: 100%;
        margin-right: 0;
    }
    .side3 {
        width: 100%;
    }
    .sidehr {
        margin-top: 20px;
        background-color: #000;
        height: 2px;
        width: 20px;
    }
    h2 {
        font-size: 27px;
    }
    .ex1 {
        width: 100%;
        margin-right: 0;
    }
    .ex2 {
        width: 100%;
        margin-right: 0;
    }
    .ex3 {
        width: 100%;
    }
}    
</style>
<script>
  document.createElement('footer');
</script>
<![endif]-->
    
<body>
   
   <div class="grid">
       <h1>CSS Grid Layout</h1>
       <hr class="first-line">
       <div class="main">
           <div class="mainimg"></div>
           <h2>Most powerful layout system </h2>
           <p>Is a two-dimensional grid-based layout system that aims to do nothing less than completely change the way we design grid-based user interfaces.</p>
           <hr class="mainhr">
       </div>
       <div class="side1">
           <h3>Basics and Browser Support</h3>
           <p>To get started you have to define a container element as a grid with display: grid, set the column and row sizes with grid-template-columns and grid-template-rows, and then…</p>
           <hr class="sidehr">
       </div>
       <div class="side2">
           <h3>Basics and Browser Support</h3>
           <p>To get started you have to define a container element as a grid with display: grid, set the column and row sizes with grid-template-columns and grid-template-rows, and then…</p>
           <hr class="sidehr">
       </div>
       <div class="side3">
           <h3>Basics and Browser Support</h3>
           <p>To get started you have to define a container element as a grid with display: grid, set the column and row sizes with grid-template-columns and grid-template-rows, and then…</p>
           <hr class="sidehr">
       </div>
       <hr class="morehr">
       <h4>Examples</h4>
       <div class="ex1">
           <div class="eximg1"></div>
           <h3>Basics and Browser Support</h3>
           <p>To get started you have to define a container element as a grid with display: grid, set the column and row sizes with grid-template-columns and grid-template-rows, and then…</p>
       </div>
       <div class="ex2">
           <div class="eximg2"></div>
           <h3>Basics and Browser Support</h3>
           <p>To get started you have to define a container element as a grid with display: grid, set the column and row sizes with grid-template-columns and grid-template-rows, and then…</p>
       </div>
       <div class="ex3">
           <div class="eximg3"></div>
           <h3>Basics and Browser Support</h3>
           <p>To get started you have to define a container element as a grid with display: grid, set the column and row sizes with grid-template-columns and grid-template-rows, and then…</p>
       </div>
       <footer class="footer">
           <ul class="footerlist">
               <li class="github"><a href="#">github</a></li>
               <li class="codepen"><a href="#">codepen</a></li>
               <li class="medium"><a href="#">medium</a></li>
               <li class="youtube"><a href="#">youtube</a></li>
           </ul>
       </footer>
   </div>
  
            
          
!
            
              * {
     margin: 0;
     padding: 0;
     border: 0;
 }
 h1,
 h2,
 h3,
 h4,
 .more {
     font-family: oswald, helvetica, sans-serif;
     font-weight: bold;
 }
 h1 {
     grid-column: 1/7;
     grid-row: 1/2;
     font-size: 91.12px;
     line-height: 100px;
 }
 h3 {
     font-size: 18px;
     line-height: 1.3;
     margin-bottom: 10px;
 }
 h2 {
     font-size: 40.5px;
     line-height: 31.5px;
     margin-bottom: 13px;
 }
 h4 {
     font-size: 27px;
     line-height: 27px;
     background-color: #fff;
 }
 p {
     font-family: Quattrocento, serif;
     font-size: 12px;
     line-height: 1.4;
 }
 .eximg1 {
     background-image: url(http://we3studio.pl/smashingmagazine/1.jpg);
 }
 .eximg2 {
     background-image: url(http://we3studio.pl/smashingmagazine/2.jpg);
 }
 .eximg3 {
     background-image: url(http://we3studio.pl/smashingmagazine/3.jpg);
 }
.mainimg {
     background-image: url(http://we3studio.pl/smashingmagazine/main.jpg);
 }
        

@supports (display: grid) {
    .grid {
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        grid-template-rows: 100px 20px 100px 100px 100px 40px 100px 100px 100px 100px;
        grid-gap: 20px;
        margin: 0 auto;
        padding: 50px 100px 0px 100px;
        max-width: 1200px;
    }
    h1 {
        grid-column: 1/7;
        grid-row: 1/2;
    }
    .first-line {
        grid-column: 1/7;
        grid-row: 2/3;
        height: 20px;
        background-color: #000;
    }
    .main {
        grid-column: 3/7;
        grid-row: 3/5;
        cursor: pointer;
    }
    .mainimg {
        background-size: cover;
        height: 220px;
        width: 100%;
        margin-bottom: 20px;
    }
    .main > p {
        width: 80%;
    }
    .mainhr {
        display: none;
    }
    .side1,
    .side2,
    .side3 {
        position: relative;
        cursor: pointer;
    }
    .side1 {
        grid-column: 1/3;
        grid-row: 3/4;
    }
    .side2 {
        grid-column: 1/3;
        grid-row: 4/5;
    }
    .side3 {
        grid-column: 1/3;
        grid-row: 5/6;
    }
    .sidehr {
        height: 2px;
        background-color: #000;
        position: absolute;
        bottom: 0px;
        width: 20px;
    }
    h4 {
        grid-column: 1/2;
        grid-row: 6/7;
    }
    .morehr {
        height: 2px;
        width: 100%;
        background-color: #000;
        grid-column: 1/7;
        grid-row: 6/7;
        -webkit-align-self: center;
        -ms-flex-item-align: center;
        align-self: center;
    }
    .ex1 {
        grid-column: 1/3;
        grid-row: 7/10;
        cursor: pointer;
    }
    .ex2 {
        grid-column: 3/5;
        grid-row: 7/10;
        cursor: pointer;
    }
    .ex3 {
        grid-column: 5/7;
        grid-row: 7/10;
        cursor: pointer;
    }
    .eximg1,
    .eximg2,
    .eximg3 {
        height: 220px;
        width: 100%;
        background-size: cover;
        margin-bottom: 20px;
    }
    footer {
        background-color: #000;
        grid-column: 1/7;
        grid-row: 10/11;
    }
    .footerlist {
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        grid-template-rows: 100px;
        list-style: none;
    }
    .footerlist a {
        color: #fff;
        text-decoration: none;
        font-family: oswald, helvetica, sans-serif;
        font-weight: normal;
        font-size: 12px;
    }
    .github {
        grid-column: 2/3;
        -webkit-align-self: center;
        -ms-flex-item-align: center;
        align-self: center;
        justify-self: center;
    }
    .codepen {
        grid-column: 3/4;
        -webkit-align-self: center;
        -ms-flex-item-align: center;
        align-self: center;
        justify-self: center;
    }
    .medium {
        grid-column: 4/5;
        -webkit-align-self: center;
        -ms-flex-item-align: center;
        align-self: center;
        justify-self: center;
    }
    .youtube {
        grid-column: 5/6;
        -webkit-align-self: center;
        -ms-flex-item-align: center;
        align-self: center;
        justify-self: center;
    }
    @media all and (max-width: 1000px) {
        .grid {
            padding: 50px 50px 0px 50px;
        }
    }
    @media all and (max-width: 870px) {
        .grid {
            grid-template-rows: auto 20px auto auto 40px auto 100px;
        }
        .main {
            grid-column: 1/7;
            grid-row: 3/4;
        }
        .mainhr {
            height: 2px;
            background-color: #000;
            margin-top: 20px;
            width: 20px;
            display: block;
        }
        .side1 {
            grid-column: 1/3;
            grid-row: 4/5;
        }
        .side2 {
            grid-column: 3/5;
            grid-row: 4/5;
        }
        .side3 {
            grid-column: 5/7;
            grid-row: 4/5;
        }
        .sidehr {
            display: none;
        }
        h4 {
            grid-column: 3/5;
            justify-self: center;
            grid-row: 5/6;
            padding: 0 20px;
        }
        .morehr {
            grid-row: 5/6;
        }
        .ex1 {
            grid-column: 1/3;
            grid-row: 6/7;
        }
        .ex2 {
            grid-column: 3/5;
            grid-row: 6/7;
        }
        .ex3 {
            grid-column: 5/7;
            grid-row: 6/7;
        }
        footer {
            grid-row: 7/8;
        }
    }
    @media all and (max-width: 620px) {
        .grid {
            padding: 25px 20px 0px 20px;
            grid-template-rows: auto 20px auto auto auto auto 40px auto auto auto 100px;
        }
        h1 {
            font-size: 60.75px;
            line-height: 1.3;
        }
        .side1 {
            grid-column: 1/7;
            grid-row: 4/5;
        }
        .side2 {
            grid-column: 1/7;
            grid-row: 5/6;
        }
        .side3 {
            grid-column: 1/7;
            grid-row: 6/7;
        }
        h2 {
            font-size: 27px;
        }
        .sidehr {
            display: block;
            position: relative;
            margin-top: 20px;
        }
        h4 {
            grid-row: 7/8;
        }
        .morehr {
            grid-row: 7/8;
        }
        .ex1 {
            grid-column: 1/7;
            grid-row: 8/9;
        }
        .ex2 {
            grid-column: 1/7;
            grid-row: 9/10;
        }
        .ex3 {
            grid-column: 1/7;
            grid-row: 10/11;
        }
        footer {
            grid-row: 11/12;
        }
        .footerlist {
            grid-template-columns: repeat(4, 1fr);
        }
        .github {
            grid-column: 1/2;
        }
        .codepen {
            grid-column: 2/3;
        }
        .medium {
            grid-column: 3/4;
        }
        .youtube {
            grid-column: 4/5;
        }
    }
}
    
/* flexbox fallback is the browser does not support display:grid */

@supports not (display: grid) {
    h1 {
        line-height: 100px;
        width: 100%;
    }
    .grid {
        display: -webkit-box;
        display: -webkit-flex;
        display: -ms-flexbox;
        display: flex;
        margin: 0 auto;
        padding: 50px 100px 0px 100px;
        max-width: 1200px;
        -webkit-flex-wrap: wrap;
        -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    }
    .first-line {
        height: 20px;
        width: 100%;
        margin-top: 20px;
        background-color: #000;
    }
    .main {
        cursor: pointer;
        width: 100%;
        margin: 20px 0;
    }
    .mainimg {
        background-size: cover;
        height: 220px;
        width: 100%;
        margin-bottom: 20px;
    }
    h2 {
        font-size: 40.5px;
        line-height: 31.5px;
        margin-bottom: 13px;
    }
    .main > p {
        width: 80%;
    }
    .mainhr {
        height: 2px;
        background-color: #000;
        margin-top: 20px;
        width: 20px;
    }
    .side1 {
        -webkit-box-flex: 1;
        -webkit-flex: 1;
        -ms-flex: 1;
        flex: 1;
        margin-right: 20px;
    }
    .side2 {
        -webkit-box-flex: 1;
        -webkit-flex: 1;
        -ms-flex: 1;
        flex: 1;
        margin-right: 20px;
    }
    .side3 {
        -webkit-box-flex: 1;
        -webkit-flex: 1;
        -ms-flex: 1;
        flex: 1;
    }
    .morehr {
        height: 2px;
        width: 100%;
        background-color: #000;
        margin-top: 20px;
    }
    h4 {
        width: 100%;
        margin-top: 20px;
        margin-bottom: 20px;
    }
    .ex1 {
        -webkit-box-flex: 1;
        -webkit-flex: 1;
        -ms-flex: 1;
        flex: 1;
        margin-right: 20px;
    }
    .ex2 {
        -webkit-box-flex: 1;
        -webkit-flex: 1;
        -ms-flex: 1;
        flex: 1;
        margin-right: 20px;
    }
    .ex3 {
        -webkit-box-flex: 1;
        -webkit-flex: 1;
        -ms-flex: 1;
        flex: 1;
    }
    .eximg1,
    .eximg2,
    .eximg3 {
        height: 220px;
        background-size: cover;
        margin-bottom: 20px;
    }
    footer {
        height: 100px;
        width: 100%;
        background-color: #000;
        margin-top: 20px;
    }
    footer ul {
        list-style: none;
        width: 100%;
        display: -webkit-box;
        display: -webkit-flex;
        display: -ms-flexbox;
        display: flex;
        -webkit-flex-wrap: wrap;
        -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    }
    footer li {
        -webkit-box-flex: 1;
        -webkit-flex: 1;
        -ms-flex: 1;
        flex: 1;
    }
    footer a {
        color: #fff;
        text-decoration: none;
        line-height: 100px;
        text-align: center;
        width: 100%;
        display: block;
        font-family: oswald, helvetica, sans-serif;
        font-weight: normal;
        font-size: 12px;
    }
    @media all and (max-width: 1000px) {
        .grid {
            padding: 50px 50px 0px 50px;
        }
    }
    @media all and (max-width: 620px) {
        .grid {
            padding: 25px 20px 0px 20px;
        }
        h1 {
            font-size: 60.75px;
            line-height: 1.3;
        }
        .side1 {
            -webkit-box-flex: 1;
            -webkit-flex: auto;
            -ms-flex: auto;
            flex: auto;
            margin: 0 0 20px 0;
        }
        .side2 {
            -webkit-box-flex: 1;
            -webkit-flex: auto;
            -ms-flex: auto;
            flex: auto;
            margin: 0 0 20px 0;
        }
        .side3 {
            -webkit-box-flex: 1;
            -webkit-flex: auto;
            -ms-flex: auto;
            flex: auto;
        }
        .sidehr {
            margin-top: 20px;
            background-color: #000;
            height: 2px;
            width: 20px;
        }
        h2 {
            font-size: 27px;
        }
        .ex1 {
            -webkit-box-flex: 1;
            -webkit-flex: auto;
            -ms-flex: auto;
            flex: auto;
            margin-right: 0;
            margin-bottom: 20px;
        }
        .ex2 {
            -webkit-box-flex: 1;
            -webkit-flex: auto;
            -ms-flex: auto;
            flex: auto;
            margin-right: 0;
            margin-bottom: 20px;
        }
        .ex3 {
            -webkit-box-flex: 1;
            -webkit-flex: auto;
            -ms-flex: auto;
            flex: auto;
        }
    }
}   
            
          
!
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