:root {
  --black: #000000;
  --white: #ffffff;
  --bg: #ffffff;
  --bg-soft: #f5f5f5;
  --border: #e0e0e0;
  --muted: #666666;
  --text: #1a1a1a;
  --max-width: 50rem;
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  opacity: 0.7;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--white);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

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

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

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

.nav a:hover {
  color: var(--black);
  opacity: 1;
}

/* Main content */
.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
}

.page__title {
  font-size: clamp(1.6rem, 5vw, 2.25rem);
  line-height: 1.2;
  margin: 0 0 0.5rem;
  color: var(--black);
}

.page__meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

section h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.6rem;
  color: var(--black);
}

section p,
section li {
  color: var(--text);
}

ul {
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.4rem;
}

.intro {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}

.intro p {
  margin: 0;
}

/* Hero (index) */
.hero {
  text-align: center;
  padding: 3rem 1.25rem 1rem;
}

.hero h1 {
  font-size: clamp(1.8rem, 6vw, 2.75rem);
  margin: 0 0 0.75rem;
  color: var(--black);
}

.hero p {
  color: var(--muted);
  max-width: 36rem;
  margin: 0 auto;
}

.cards {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.25rem;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--black);
  background: var(--white);
  transition: border-color 0.2s ease, transform 0.2s ease;
  display: block;
}

.card:hover {
  border-color: var(--black);
  transform: translateY(-2px);
  opacity: 1;
}

.card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  margin-top: 3rem;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.site-footer__inner h3 {
  font-size: 1rem;
  color: var(--black);
  margin: 0 0 0.75rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
}

.contact-list li {
  margin-bottom: 0.35rem;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--black);
}

.copyright {
  margin-top: 1rem;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 480px) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .page {
    padding: 2rem 1rem 2.5rem;
  }
}