:root {
    --ink: #1a1f2e;
    --muted: #5b6478;
    --rule: #e3e6ec;
    --accent: #1f5fbf;
    --bg: #ffffff;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

header.site {
    border-bottom: 1px solid var(--rule);
    background: #fafbfc;
}

header.site .inner {
    max-width: 760px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header.site .brand {
    font-weight: 600;
    font-size: 17px;
    color: var(--ink);
    text-decoration: none;
    letter-spacing: -0.01em;
}

header.site .brand .mark {
    color: var(--accent);
}

header.site nav a {
    color: var(--muted);
    text-decoration: none;
    margin-left: 20px;
    font-size: 14px;
}

header.site nav a:hover {
    color: var(--ink);
}

main {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 64px;
}

h1 {
    font-size: 32px;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin: 0 0 8px;
}

p.effective {
    color: var(--muted);
    font-size: 14px;
    margin: 0 0 32px;
}

h2 {
    font-size: 20px;
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin: 36px 0 12px;
}

p, ul, ol {
    margin: 0 0 14px;
}

ul, ol {
    padding-left: 22px;
}

li {
    margin-bottom: 6px;
}

a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

footer.site {
    border-top: 1px solid var(--rule);
    color: var(--muted);
    font-size: 13px;
}

footer.site .inner {
    max-width: 760px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

footer.site a {
    color: var(--muted);
    text-decoration: none;
    margin-left: 16px;
}

footer.site a:hover {
    color: var(--ink);
}