:root {
    color-scheme: light;
    font-family: Arial, sans-serif;
}

html {
    background: #f5f5f5;
    color: #202020;
}

html.theme-black {
    background: #181818;
    color: #e6e6e6;
    color-scheme: dark;
}

html.theme-oled {
    background: #000;
    color: #e6e6e6;
    color-scheme: dark;
}

body {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    line-height: 1.45;
    margin: 0 auto;
    max-width: 1100px;
    min-height: 100vh;
    padding: 0 18px;
}

a {
    color: #245b91;
}

a:hover {
    color: #123f6b;
}

.theme-black a,
.theme-oled a {
    color: #8ebbea;
}

.theme-black a:hover,
.theme-oled a:hover {
    color: #b8d8f5;
}

.site-header,
.site-footer {
    padding: 18px 0;
}

.site-header {
    align-items: center;
    display: flex;
    gap: 24px;
    justify-content: space-between;
}

.site-brand {
    font-size: 1.2rem;
    white-space: nowrap;
}

.site-navigation {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.site-navigation form {
    display: inline;
}

.page-content {
    background: #fff;
    border: 1px solid #d8d8d8;
    flex: 1;
    padding: 24px;
}

.theme-black .page-content {
    background: #222;
    border-color: #444;
}

.theme-oled .page-content {
    background: #000;
    border-color: #444;
}

button,
input,
select {
    border: 1px solid #999;
    border-radius: 3px;
    box-sizing: border-box;
    font: inherit;
    padding: 7px;
}

button {
    background: #f8f8f8;
    color: #202020;
    cursor: pointer;
}

button:hover {
    background: #e9e9e9;
}

.theme-black button,
.theme-black input,
.theme-black select,
.theme-oled button,
.theme-oled input,
.theme-oled select {
    background: #292929;
    border-color: #666;
    color: #eee;
}

.theme-black button:hover,
.theme-oled button:hover {
    background: #3d3d3d;
}

form {
    margin: 12px 0;
}

li {
    margin: 8px 0;
}

dt {
    font-weight: bold;
    margin-top: 12px;
}

dd {
    margin-left: 0;
}

pre {
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.site-footer {
    display: flex;
    gap: 24px;
    justify-content: space-between;
}

.site-footer > * {
    margin: 0;
}

.footer-legal {
    text-align: left;
}

.footer-theme {
    text-align: right;
}

@media (max-width: 700px) {
    body {
        padding: 0 10px;
    }

    .site-header,
    .site-footer {
        align-items: stretch;
        flex-direction: column;
        gap: 10px;
        padding: 12px 0;
    }

    .page-content {
        padding: 16px;
    }

    .site-navigation {
        line-height: 1.8;
    }

    .footer-theme {
        text-align: left;
    }

    input,
    select {
        max-width: 100%;
    }

    img,
    video,
    iframe {
        height: auto;
        max-width: 100%;
    }
}