JSFiddle - React, Tailwind, and code Playground

HTML

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <title>CSS Fluid Grid</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    
    <style>
        body {
            padding:50px;            
        }
        .container {
            background:#ccc;
        }
        .box {
          background:#333;
          margin-bottom:2%;                                
        }
        .box-green {
          background:green;
        }
    </style>
</head>
    
<body>

    <h1>Columns</h1>        
    <div class="container">
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
        
        <div class="ten columns box"> - </div>
        
        <div class="five columns box"> - </div>
        <div class="five columns box"> - </div>
        
        <div class="ten columns box">
            <div class="nested">
                <div class="five columns box-green"> - </div>
                <div class="five columns box-green"> - </div>
            </div>
        </div>
        
        <div class="five columns box">
            <div class="nested">
                <div class="five columns box-green"> - </div>
                <div class="five columns box-green"> - </div>
            </div>
        </div>
    
        <div class="five columns box">
            -
        </div>
    </div>
    
    <hr>
    
    <h1>Gallery example</h1>       
    <div class="container">
        <div class="one column box"> - </div>
        <div class="one column box"> - </div>
     ...

CSS

.container {
    width:100%;
    margin: 0 auto;
    clear: both;
    *zoom: 1;
}

.container:after {
    content:".";
    clear:both;
    display:block;
    height:0;
    visibility:hidden;
}

.column, .columns {
    float: left;
    display: inline;
    margin-left: 1%;
    margin-right: 1%;
    overflow-x:hidden;
}

.zero { width: 3%; }
.one { width: 8%; }
.two { width: 18%; }
.three { width: 28%; }
.four { width: 38%; }
.five { width: 48%; }
.six { width: 58%; }
.seven { width: 68%; }
.eight { width: 78%; }
.nine { width: 88%; }
.ten { width: 98%; }

.nested {
    width:102%;
    margin-left:-1%;
}