:root {
    color-scheme: light dark;

    --light-background: #fff;
    --light-panel: #f6f6f6;
    --light-text: #000;
    --light-link: #555;
    --light-button: #ddd;
    --light-button-hover: #c6c6c6;

    --dark-background: #000;
    --dark-panel: #202020;
    --dark-text: #fff;
    --dark-link: #ccc;
    --dark-button: #3d3d3d;
    --dark-button-hover: #505050;
}

* {
    box-sizing: border-box;
    border: none;
}


body {
    background-color: var(--light-background);
    color: var(--light-text);
}

body > * {
    background-color: var(--light-panel);
}

a {
    color: var(--light-link);
}

nav li {
    background-color: var(--light-button);
}
nav li:hover {
    background-color: var(--light-button-hover);
}
nav li a,
h1 > a {
    color: var(--light-text);
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--dark-background);
        color: var(--dark-text);
    }

    body > * {
        background-color: var(--dark-panel);
    }

    a {
        color: var(--dark-link);
    }

    nav li {
        background-color: var(--dark-button);
    }
    nav li:hover {
        background-color: var(--dark-button-hover);
    }

    nav li a,
    h1 > a {
        color: var(--dark-text);
    }
}

.dark {
    background-color: var(--dark-background);
    color: var(--dark-text);
}

.dark > * {
    background-color: var(--dark-panel);
}

.dark a {
    color: var(--dark-link);
}

.dark nav li {
    background-color: var(--dark-button);
}
.dark nav li:hover {
    background-color: var(--dark-button-hover);
}
.dark nav li a,
.dark h1 > a {
    color: var(--dark-text);
}

.light {
    background-color: var(--light-background);
    color: var(--light-text);
}
.light > * {
    background-color: var(--light-panel);
}
.light a {
    color: var(--light-link);
}
.light nav li {
    background-color: var(--light-button);
}
.light nav li:hover {
    background-color: var(--light-button-hover);
}
.light nav li a,
.light h1 > a {
    color: var(--light-text);
}

:root {
    align-items: center;
    display: flex;
    flex-direction: column;
    font-family: sans-serif;
    font-size: 16px;
    line-height: 1.6rem;
}

body {
    display: flex;
    flex-direction: column;
    width: min(97ex, 100%);
    margin: 1em 0 5em 0;
}

header {
    flex: 1 0 auto;
    border: 11px #f0f;
    border-top-style: solid;
    border-radius: 9px 9px 0 0;
    display: flex;
    flex-direction: row;
    align-items: center;
}

h1 {
    flex: 1 0 auto;
    font-size: clamp(8rem, 13.5vw, 15rem);
    font-weight: normal;
    line-height: normal;
    text-align: center;
    margin: 0;
}
h1 > a {
    text-decoration: none;
}

.theme {
    margin-right: 1em;
    cursor: pointer;
    display: none;
}
.dark .theme-light,
.light .theme-dark {
    display: initial;
}

nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1em 0;
    border: 11px #f0f;
    border-bottom-style: solid;
    border-radius: 0 0 9px 9px;
    margin-bottom: 0.5em;
}

nav ul {
    display: flex;
    column-gap: 1em;
    margin: 0;
    padding: 0;
    align-content: center;
}

nav li {
    list-style-type: none;
    padding: 0.5em 1em;
    border-radius: 9px;
}


main {
    padding: 1em;
    width: 100%;
    border-radius: 9px;
}

h2 {
    font-size: 200%;
    margin-top: 2em;
}

address {
    font-style: normal;
}


@media (max-width: 760px) {
    body {
        margin: 0 0 1em 0;
    }

    nav ul {
        gap: 0.5em;
    }

    nav li {
        padding: 0.25em 0.5em;
        font-size: 90%;
    }
}