<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Reference: Percentage gap, content-based width/height (via float)</title>
<style>
    #grid {
        border: solid 5px teal;
        width: 200px;
        height: 100px;
        padding: 10px 0 0 10px;
    }

    #grid > div {
        float: left;
        border: solid 5px aqua;
        width: 70px;
        height: 30px;
        margin-left: 5px;
    }

    /* highlight manual pass condition */
    #grid > div:nth-child(even) {
        border-right: none;
        margin-left: 40px;
    }
    #grid > div:nth-child(n + 3) {
        border-bottom: none;
        margin-top: 25px;
    }
</style>

<p>Test passes if there is no red.

<div id="grid">
    <div></div>
    <div></div>
    <div></div>
    <div></div>
</div>
