body {
    margin: 0;
    height: 100vh;
    font-family: Helvetica, Arial, sans-serif;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    grid-template-areas:
        'header'
        'main'
        'footer';
}

header {
    grid-area: header;
    display: grid;
    grid-template-columns: 50px auto;
    grid-gap: 1rem;
    align-items: center;
    border-bottom: 1px solid #ccc;
}

    header img {
        display: block;
        width: 48px;
        aspect-ratio: 1;
        margin-block: 0.2rem;
        margin-inline-start: 0.3rem;
    }

    header h1 {
        margin: 0;
        padding: 0;
        font-size: 1.2rem;
        font-weight: 400;
    }

main {
   grid-area: main;
   overflow: auto;
   margin: 1.5rem auto;
   max-width: 75ch;
   line-height: 1.6;
}

footer {
   grid-area: footer;
   margin-block: 0.5rem;
   margin-inline-end: 0.5rem;
   text-align: right;
}