:root {
  --color-bg: #FFFFFF;
  --color-ink: #1B2430;
  --color-accent: #3D6B8A;
  --color-surface: #F2F5F7;
  --font-display: system-ui, -apple-system, "Malgun Gothic", sans-serif;
  --font-body: system-ui, -apple-system, "Malgun Gothic", sans-serif;
}

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
}

.site-header__logo { font-weight: 700; }
.site-header__nav a { font-size: 0.9rem; }
.site-header__nav a:hover,
.site-header__nav a:focus-visible { text-decoration: underline; }

.hero { background: var(--color-surface); }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 2.5rem); }
.hero__cta {
  background: var(--color-ink);
  color: #FFFFFF;
  border-radius: 6px;
  padding: 0.85em 1.6em;
  font-weight: 700;
  width: fit-content;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  padding-block: clamp(2rem, 5vw, 3rem);
}
.hub-grid a {
  display: block;
  background: var(--color-surface);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  font-weight: 700;
}
.hub-grid a span {
  display: block;
  font-weight: 400;
  font-size: 0.85rem;
  margin-top: 0.35rem;
  color: var(--color-accent);
}
.hub-grid a:hover,
.hub-grid a:focus-visible {
  background: var(--color-ink);
  color: #FFFFFF;
}
.hub-grid a:hover span,
.hub-grid a:focus-visible span { color: #FFFFFF; }

.cta-block { background: var(--color-ink); color: #FFFFFF; }
.cta-block__title { font-size: 1.3rem; }
.cta-block__button {
  background: #FFFFFF;
  color: var(--color-ink);
  border-radius: 6px;
  font-weight: 700;
}
.site-footer { background: var(--color-ink); color: #FFFFFF; font-size: 0.85rem; }
.site-footer nav a:hover,
.site-footer nav a:focus-visible { text-decoration: underline; }