Layaout grid area resolution

by Alejandro M

HTML

<header>Header</header>
<aside>Sidebar</aside>
<main>Main Content</main>
<footer>Footer</footer>

CSS

body {
            margin: 0;
            display: grid;
            grid-template-areas:
                "header header"
                "sidebar main"
                "footer footer";
            grid-template-columns: 20% 1fr;
            grid-template-rows: auto 1fr auto;
            height: 100vh;
            gap: 10px;
        }

        header {
            grid-area: header;
            background: #3498db;
            color: white;
            padding: 20px;
            text-align: center;
        }

        aside {
            grid-area: sidebar;
            background: #2ecc71;
            color: white;
            padding: 20px;
        }

        main {
            grid-area: main;
            background: #f1c40f;
            padding: 20px;
        }

        footer {
            grid-area: footer;
            background: #e74c3c;
            color: white;
            text-align: center;
            padding: 20px;
        }

        /* 📱 Mobile */
        @media (max-width: 767px) {
            body {
                grid-template-areas:
                    "header"
                    "main"
                    "sidebar"
                    "footer";
                grid-template-columns: 1fr;
                grid-template-rows: auto 1fr auto auto;
            }
        }