html, body {
    margin: 0;
    font-family: system-ui, sans-serif;
}

.container {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-areas:
        "main"
        "left"
        "right";
    gap: 1rem;
    width: 100%;
    align-items: start;
}

.main-content { grid-area: main; }
.left-side   { grid-area: left; justify-self: center; }
.right-side  { grid-area: right; justify-self: center; }

@media (min-width: 1024px) {
    .container {
        grid-template-columns: minmax(0, 1fr) minmax(auto, 1024px) minmax(0, 1fr);
        grid-template-areas: "left main right";
    }

    .left-side,
    .right-side {
        justify-self: center;
    }
}

.main-content {
    grid-area: main;
}

.grid {
    display: grid;
    flex-direction: column;
    grid-template-columns: 12;
    gap: 1rem;
    padding: 1rem;
}

.grid > * {
    grid-column: span 12;
}

h1 {
    margin: 0;
}