:root {
  --color-bg: #ffffff;
  --color-text: #1a1d21;
  --color-text-muted: #52585f;
  --color-border: #e4e7eb;
  --color-accent: #2f6f4e;
  --color-accent-hover: #234f38;
  --color-header-bg: #ffffff;
  --color-footer-bg: #f7f8f9;
  --max-width: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14161a;
    --color-text: #eceef0;
    --color-text-muted: #a7adb4;
    --color-border: #2a2e34;
    --color-accent: #6fbf94;
    --color-accent-hover: #8fd1ac;
    --color-header-bg: #14161a;
    --color-footer-bg: #191c20;
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 17px;
}

a {
  color: var(--color-accent);
}

a:hover,
a:focus {
  color: var(--color-accent-hover);
}

.site-header {
  background: var(--color-header-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand:hover,
.brand:focus {
  color: var(--color-text);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3.5rem;
}

.page-title {
  font-size: 2rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}

.effective-date {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0 0 2rem;
}

.intro {
  margin-bottom: 2rem;
}

article h2 {
  font-size: 1.3rem;
  margin: 2.25rem 0 0.75rem;
  padding-top: 0.25rem;
  letter-spacing: -0.01em;
}

article h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.5rem;
}

article p {
  margin: 0 0 1rem;
}

article ul {
  margin: 0 0 1rem;
  padding-left: 1.4rem;
}

article li {
  margin-bottom: 0.4rem;
}

.cross-link {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.back-link {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.95rem;
}

.home-links {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}

.home-links li {
  margin-bottom: 0.75rem;
}

.home-links a {
  font-size: 1.05rem;
  text-decoration: none;
  font-weight: 600;
}

.home-links a:hover,
.home-links a:focus {
  text-decoration: underline;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-footer-bg);
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: baseline;
  justify-content: space-between;
}

.site-footer nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-footer a:hover,
.site-footer a:focus {
  color: var(--color-accent);
}

.site-footer .copyright {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}