First flexbox-fiddle

by agib

HTML

<div class="container">
    <div class="row">
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
    </div>
    <div class="row">
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
    </div>
    <div class="row">
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
    </div>
    <div class="row">
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
    </div>
</div>

CSS

.container {
    /*padding: 20px;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    width: 100%;
    -webkit-flex-flow: column;*/
}
.row {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-flow: row wrap;
}
.box {
    background-color: #e3e3e3;
    outline: 1px solid #777;
    min-height: 80px;
    margin-left: 20px;
    margin-bottom: 20px;
    min-width: 160px;
    flex: 1;    
}