* {
    box-sizing: border-box;
}

:root {
    --layout-background-color: rgb(36, 36, 36);
    --layout-background-color-light: #303030;

    --layout-secondary-background-color: #202020;
    --layout-secondary-background-color-light: #2b2b2b;
    --layout-font-color: rgb(255, 255, 255);
    --layout-boxshadow-color: rgb(29, 29, 29);
    --layout-boxshadow-blur: 5px;
    --layout-boxshadow-spread: 1px;

}

html,
body {
    margin: 0;
    height: 100%;
    width: 100%;
    background-color: var(--layout-background-color-light);
    max-height: var(--page-max-height);
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

body {
    display: grid;
    grid-template-columns: 230px 1fr;
    grid-template-rows: 75px 1fr auto;
    grid-template-areas:
        "header header"
        "main main"
        "footer footer";
}

header {
    grid-area: header;
    background-color: var(--layout-background-color);
    color: var(--layout-font-color);
    box-shadow: 0px 5px 5px 3px rgba(182, 182, 182, 0.671);
    box-shadow: 0px 5px var(--layout-boxshadow-blur) var(--layout-boxshadow-spread) var(--layout-boxshadow-color);
    z-index: 1;
}

nav {
    background-color: var(--layout-background-color);
    color: var(--layout-font-color);
    box-shadow: 5px 10px 15px 3px rgba(202, 202, 202);
    box-shadow: 5px 5px var(--layout-boxshadow-blur) var(--layout-boxshadow-spread) var(--layout-boxshadow-color);
    z-index: 3;
}

footer {
    grid-area: footer;
    margin-top: 5rem;
    z-index: 3;
    background-color: var(--layout-secondary-background-color);
    color: white;
}

main {
    grid-area: main;
}

@media screen and (max-width: 700px) {
    footer {
        margin-top: 1rem;
    }   
}