CSC-Web/4-blocks.html at master · williamcll/CSC-Web · GitHub

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<!DOCTYPE html>
<html>
    <head>
        <title>Page Title</title>
        <style type="text/css">
            .box { width: 100px;
                height: 100px;
                text-align: center;
                line-height: 100px;
                font-size: 40px;
                font-weight: bold;
                border-radius: 6px;
                font-family: 'Arial';
                float: left;
            }

            .row { overflow: hidden; }
            .redBox { color: red; border: solid 3px red; }
            .greenBox { color: green; border: solid 3px green; }
            .blueBox { color: blue; border: solid 3px blue; }

            #firstRow { margin-left: 100px; }
            #secondRow { margin-left: calc((100px * 3 - 100px * 2)/2); }

        </style>
    </head>
    <body>
        <div class="row" id="firstRow">
            <div class="box blueBox">A</div>
        </div>
        <div class="row" id="secondRow">
            <div class="box redBox">B</div>
            <div class="box greenBox">C</div>
        </div>
        <div class="row">
            <div class="box blueBox">D</div>
            <div class="box greenBox">E</div>
            <div class="box redBox">F</div>
        </div>


    </body>
</html>