body {
    min-height: 100vh;
    position: relative;

    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-height) 1fr;
    grid-template-areas:
        "header"
        "main";
}

body > header {
    color: var(--header-text-color);
    background-color: var(--header-background-color);
    grid-area: header;

    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--body-padding);

    position: sticky;
    top: 0;
    z-index: 20;
}

body > header ul {
    display: flex;
    align-items: center;
    gap: 1rem;
}

body > header ul:not(:last-child) {
    margin: 0;
}

body > header li {
    display: flex;
    align-items: center;
    margin: 0;
    line-height: 1;
}

body > header svg {
    width: 1.5rem;
    height: 1.5rem;
    flex-shrink: 0;
    --icon-color: var(--header-text-color);
}

body > header svg.logo {
    width: 4rem;
    height: 3rem;
}

body > header h1 {
    font-weight: 700;
    font-size: 1.2rem;
    margin: 0;
}

body > header .button,
body > header button {
    --background: var(--header-background-color);
    --border: var(--header-text-color);
}

main {
    grid-area: main;

    min-width: 13rem;
    max-width: 80rem;
    width: 100%;

    margin: 0 auto;
    padding: 0 var(--body-padding);
}

section {
    padding: var(--body-padding);
}

section:not(:last-child) {
    border-bottom: 1px solid var(--weak-border-color);
}

footer {
    padding: var(--body-padding);
    grid-area: footer;

    display: flex;
    flex-direction: column;
    justify-content: space-between;

    color: var(--inverted-text-color);
    background-color: var(--inverted-background-color);
    background-image: var(--inverted-ic-logo);
    background-repeat: no-repeat;
    background-position: right var(--body-padding) bottom var(--body-padding);
}

footer a,
footer a:visited {
    color: var(--inverted-text-color);
}

footer li {
    margin-bottom: 0.5rem;
}