:root {
    color-scheme: light dark;
    --bg: #f7f7f4;
    --panel: #ffffff;
    --text: #202124;
    --muted: #626760;
    --line: #d9d9d2;
    --accent: #245f73;
    --code-bg: #eeeeea;
    --code-text: #172025;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111312;
        --panel: #181b1a;
        --text: #eeeeea;
        --muted: #a8afa8;
        --line: #303532;
        --accent: #6fb0c3;
        --code-bg: #222725;
        --code-text: #f0f3ef;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.55 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

header,
main,
footer {
    max-width: 980px;
    margin: 0 auto;
    padding: 24px;
}

header {
    padding-top: 36px;
    border-bottom: 1px solid var(--line);
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 28px;
}

nav a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 650;
}

nav a[aria-current="page"] {
    color: var(--text);
}

h1 {
    margin: 0 0 10px;
    font-size: 40px;
    line-height: 1.1;
    letter-spacing: 0;
}

h2 {
    margin: 38px 0 10px;
    font-size: 24px;
    line-height: 1.25;
    letter-spacing: 0;
}

h3 {
    margin: 24px 0 8px;
    font-size: 18px;
}

p {
    margin: 0 0 14px;
}

ul,
ol {
    margin: 0 0 18px;
    padding-left: 24px;
}

li {
    margin: 5px 0;
}

.lead {
    max-width: 760px;
    color: var(--muted);
    font-size: 19px;
}

.note {
    border: 1px solid var(--line);
    background: var(--panel);
    padding: 16px;
    margin: 20px 0;
}

code,
pre {
    font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code {
    color: var(--code-text);
    background: var(--code-bg);
    padding: 1px 5px;
}

pre {
    overflow-x: auto;
    background: var(--code-bg);
    color: var(--code-text);
    padding: 16px;
    border: 1px solid var(--line);
}

pre code {
    padding: 0;
    background: transparent;
}

figure {
    margin: 22px 0;
}

figure img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--line);
    background: #f8fafc;
}

figcaption {
    margin-top: 8px;
    color: var(--muted);
    font-size: 14px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
    margin: 18px 0;
}

.tile {
    border: 1px solid var(--line);
    background: var(--panel);
    padding: 16px;
}

.tile h3 {
    margin-top: 0;
}

.tile-link {
    display: block;
    border: 1px solid var(--line);
    background: var(--panel);
    color: var(--text);
    padding: 16px;
    text-decoration: none;
}

.tile-link:hover,
.tile-link:focus {
    border-color: var(--accent);
}

.tile-title {
    display: block;
    margin-bottom: 8px;
    color: var(--accent);
    font-size: 18px;
    font-weight: 700;
}

footer {
    color: var(--muted);
    border-top: 1px solid var(--line);
    padding-bottom: 36px;
}

@media (max-width: 640px) {
    h1 {
        font-size: 32px;
    }

    header,
    main,
    footer {
        padding-left: 18px;
        padding-right: 18px;
    }
}