:root {
    color-scheme: light dark;
    --background: #f6f8f7;
    --surface: #ffffff;
    --text: #17201c;
    --muted: #5a6761;
    --line: #d9e1dd;
    --accent: #176b4f;
    --accent-soft: #e3f0ea;
    --notice: #8a5a00;
    --notice-soft: #fff3d6;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background: #111513;
        --surface: #181e1b;
        --text: #eef4f1;
        --muted: #aebbb5;
        --line: #33413a;
        --accent: #72d5ad;
        --accent-soft: #1c3a2f;
        --notice: #f0c468;
        --notice-soft: #382e18;
    }
}

* {
    box-sizing: border-box;
}

html {
    background: var(--background);
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    background: var(--background);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.72;
    letter-spacing: 0;
}

a {
    color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover {
    text-decoration-thickness: 2px;
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--surface) 92%, transparent);
}

.header-inner,
.page,
.site-footer {
    width: min(100% - 32px, 820px);
    margin-inline: auto;
}

.header-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
}

.brand img {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgb(0 0 0 / 16%);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 18px;
    font-size: 15px;
}

.site-nav a {
    color: var(--muted);
    text-decoration: none;
}

.site-nav a[aria-current="page"] {
    color: var(--accent);
    font-weight: 650;
}

.page {
    padding-block: 52px 72px;
}

.page-header {
    padding-bottom: 30px;
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 14px;
    font-weight: 700;
}

h1,
h2,
h3 {
    line-height: 1.28;
    letter-spacing: 0;
}

h1 {
    margin: 0;
    font-size: 36px;
}

h2 {
    margin: 42px 0 12px;
    font-size: 24px;
}

h3 {
    margin: 30px 0 8px;
    font-size: 19px;
}

p,
ul {
    margin-block: 12px;
}

ul {
    padding-left: 1.25em;
}

li + li {
    margin-top: 5px;
}

.summary {
    max-width: 680px;
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 19px;
}

.meta {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.notice {
    margin-block: 24px;
    padding: 16px;
    border: 1px solid color-mix(in srgb, var(--notice) 45%, var(--line));
    border-radius: 8px;
    color: var(--notice);
    background: var(--notice-soft);
}

.link-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 28px;
}

.link-list a {
    display: block;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    background: var(--surface);
    font-weight: 700;
    text-decoration: none;
}

.link-list span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 400;
}

.site-footer {
    padding-block: 24px 36px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 14px;
}

.site-footer p {
    margin: 0;
}

@media (max-width: 620px) {
    body {
        font-size: 16px;
    }

    .header-inner {
        min-height: 68px;
    }

    .brand img {
        width: 38px;
        height: 38px;
        border-radius: 8px;
    }

    .site-nav {
        gap: 12px;
        font-size: 14px;
    }

    .page {
        padding-block: 38px 56px;
    }

    h1 {
        font-size: 30px;
    }

    h2 {
        font-size: 22px;
    }

    .summary {
        font-size: 17px;
    }

    .link-list {
        grid-template-columns: 1fr;
    }
}