:root {
  color-scheme: light;
  --bg: #f8faf6;
  --surface: #ffffff;
  --ink: #17212f;
  --muted: #5e6978;
  --line: #d8decc;
  --navy: #17345c;
  --gold: #d9a441;
  --green: #416f5a;
  --shadow: 0 18px 45px rgba(23, 33, 47, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: var(--navy);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #0f5f92;
}

.skip-link {
  left: 1rem;
  padding: 0.5rem 0.75rem;
  position: absolute;
  top: -4rem;
  z-index: 20;
}

.skip-link:focus {
  background: var(--surface);
  border: 1px solid var(--line);
  top: 0.75rem;
}

.page-shell {
  min-height: 100vh;
}

.site-header {
  align-items: center;
  background: rgba(248, 250, 246, 0.94);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 1.5rem;
  justify-content: space-between;
  padding: 1rem max(1rem, calc((100vw - 1120px) / 2));
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  color: var(--ink);
  font-size: 1.1rem;
  font-weight: 800;
  text-decoration: none;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  justify-content: flex-end;
}

.main-nav a,
.footer-links a {
  color: var(--ink);
  font-size: 0.95rem;
  text-decoration: none;
}

main {
  margin: 0 auto;
  max-width: 1120px;
  padding: 0 1rem 3rem;
}

.hero {
  padding: 4rem 0 2.5rem;
}

.eyebrow {
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 0.75rem;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.2;
}

h1 {
  color: var(--navy);
  font-size: clamp(2.1rem, 6vw, 4.6rem);
  margin: 0 0 1rem;
}

h2 {
  color: var(--navy);
  font-size: 1.55rem;
  margin: 2.4rem 0 0.75rem;
}

.lead,
.article-description {
  color: var(--muted);
  font-size: 1.15rem;
  max-width: 780px;
}

.section {
  padding: 1rem 0 2rem;
}

.section-heading {
  max-width: 760px;
}

.guide-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1.25rem;
}

.guide-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 1.1rem;
}

.guide-card h2 {
  font-size: 1.05rem;
  margin: 0 0 0.45rem;
}

.guide-card p {
  color: var(--muted);
  font-size: 0.98rem;
  margin: 0;
}

.notice {
  background: #fff8e8;
  border: 1px solid #efd79a;
  border-radius: 8px;
  margin: 2rem 0;
  padding: 1rem 1.1rem;
}

.notice h2 {
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

.notice p {
  margin: 0;
}

.article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  margin: 2rem auto;
  max-width: 860px;
  padding: clamp(1.2rem, 4vw, 3rem);
}

.article h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
}

.article p {
  margin: 0 0 1rem;
}

.updated {
  color: var(--muted);
  font-size: 0.95rem;
}

.breadcrumbs {
  align-items: center;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  font-size: 0.92rem;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.author-box {
  background: #f2f6ef;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-top: 2.5rem;
  padding: 1rem;
}

.author-box p {
  color: var(--muted);
  margin: 0.35rem 0 0;
}

.button-link {
  background: var(--navy);
  border-radius: 6px;
  color: #ffffff;
  display: inline-block;
  font-weight: 700;
  padding: 0.65rem 0.9rem;
  text-decoration: none;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  margin: 1rem auto 0;
  max-width: 1120px;
  padding: 1.5rem 1rem 2.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 0.6rem;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .main-nav {
    justify-content: flex-start;
  }

  .hero {
    padding-top: 2.5rem;
  }

  .guide-grid {
    grid-template-columns: 1fr;
  }
}