:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #17191c;
  --muted: #646b73;
  --line: #e4e7eb;
  --accent: #172554;
  --accent-soft: #e8ecf7;
  --radius: 20px;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", "Yu Gothic UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a {
  color: inherit;
}

.site-header {
  max-width: 1040px;
  margin: 0 auto;
  padding: 28px 24px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-decoration: none;
}

.nav-link {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}

.hero {
  padding: 52px 0 64px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.35;
  letter-spacing: -0.02em;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(2.3rem, 7vw, 5rem);
}

h2 {
  margin-top: 0;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}

h3 {
  margin-bottom: 0.4rem;
}

.lead {
  max-width: 700px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 1.08rem;
}

.card,
.content-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.05);
}

.card {
  display: block;
  padding: 28px;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 60px rgba(15, 23, 42, 0.09);
}

.card p,
.content-panel p,
.content-panel li {
  color: var(--muted);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.badge {
  padding: 5px 10px;
  background: var(--accent-soft);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
}

.content-panel {
  padding: clamp(24px, 5vw, 52px);
}

.content-panel + .content-panel {
  margin-top: 22px;
}

.content-panel h2:not(:first-child) {
  margin-top: 2.5rem;
}

.content-panel ul,
.content-panel ol {
  padding-left: 1.4rem;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.button.secondary {
  background: var(--accent-soft);
  color: var(--accent);
}

.notice {
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 10px;
  color: #29345c;
}

.site-footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: 28px 24px 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 640px) {
  main {
    padding-top: 28px;
  }

  .hero {
    padding-top: 30px;
  }
}