<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>css-specify-a-grid-gutter-size-with-grid-gap</title>
    <style>
        .grid-item {
            background-color: mediumturquoise;
        }

        .container {
            display: grid;
            height: 100vh;
            grid-gap: 10px 20px;
            /*
                grid-row-gap: 10px;
                grid-column-gap: 20px;
            */
            grid-template-columns: 1fr 2fr 1fr;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="grid-item">1</div>
    <div class="grid-item">2</div>
    <div class="grid-item">3</div>
    <div class="grid-item">4</div>
    <div class="grid-item">5</div>
    <div class="grid-item">6</div>
    <div class="grid-item">7</div>
    <div class="grid-item">8</div>
    <div class="grid-item">9</div>
    <div class="grid-item">10</div>
</div>
</body>
</html>
// Code goes here

/* Styles go here */