:root {
  --bg: #ffffff;
  --fg: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-soft: #eff6ff;
  --border: #e5e7eb;
  --header-bg: #111827;
  --header-fg: #f9fafb;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

header.site-header {
  background: var(--header-bg);
  color: var(--header-fg);
  padding: 1rem 0;
  border-bottom: 1px solid #1f2937;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.brand {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--header-fg);
  text-decoration: none;
}

nav.site-nav a {
  color: #d1d5db;
  text-decoration: none;
  margin-left: 1.25rem;
  font-size: 0.95rem;
}
nav.site-nav a:hover { color: #ffffff; }
nav.site-nav a:first-child { margin-left: 0; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.hero {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem 1.75rem;
  margin-bottom: 2.25rem;
}

.hero h1 { font-size: 1.7rem; font-weight: 750; margin-bottom: 0.5rem; }
.hero p { color: var(--muted); font-size: 1.02rem; }

h1, h2, h3 { font-weight: 700; line-height: 1.3; }
h2 { font-size: 1.35rem; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
p { margin-bottom: 0.9rem; }
ul, ol { margin: 0 0 0.9rem 1.4rem; }
li { margin-bottom: 0.35rem; }
a { color: var(--accent); }
strong { font-weight: 650; }

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  background: #fafafa;
}
.card h3 { margin-top: 0; color: var(--fg); }

.muted { color: var(--muted); }
.small { font-size: 0.9rem; }
.divider { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

.notice {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  padding: 0.85rem 1.1rem;
  font-size: 0.92rem;
  margin-bottom: 1.25rem;
  color: #9a3412;
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0 1.5rem;
}
.contact-grid a {
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 1rem;
  text-decoration: none;
  color: var(--fg);
  background: #fafafa;
  font-size: 0.95rem;
}
.contact-grid a:hover { border-color: var(--accent); color: var(--accent); }

@media (max-width: 560px) {
  .hero h1 { font-size: 1.4rem; }
  main { padding-top: 1.75rem; }
}