body {
    width: 100%;
}

nav a {
    width: 32%;
}

article.sub-grid-detail {
    grid-template-areas: 
        "h2"
        "solar-intro" 
        "consumer";
}

article.sub-grid-index {
    grid-template-areas: 
        "h2"
        "intro" 
        "list"
        "comparison" 
        "description"
        "hydrofig";
}