:root {
  color-scheme: light;
  --bg: #f4faf5;
  --surface: #ffffff;
  --primary: #0b6b3a;
  --primary-dark: #074b2a;
  --text: #102018;
  --muted: #4d6256;
  --line: #d8e7dc;
  --accent: #e8f4ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--primary-dark);
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.header-inner,
.main,
.site-footer {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.brand {
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.95rem;
}

.main {
  padding: 56px 0 64px;
}

.hero {
  max-width: 760px;
}

.hero h1,
.content h1 {
  margin: 0 0 18px;
  color: var(--primary-dark);
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero p {
  margin: 0;
  max-width: 680px;
  color: var(--muted);
  font-size: 1.25rem;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 40px;
}

.link-card {
  display: block;
  min-height: 112px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
}

.link-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--primary-dark);
  font-size: 1rem;
}

.link-card span {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 400;
}

.content {
  max-width: 820px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.content h1 {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
}

.content h2 {
  margin: 32px 0 10px;
  color: var(--primary-dark);
  font-size: 1.25rem;
  letter-spacing: 0;
}

.content p,
.content ol,
.content ul {
  margin: 0 0 18px;
}

.content li {
  margin-bottom: 8px;
}

.updated {
  color: var(--muted);
  font-weight: 700;
}

.notice {
  margin-top: 26px;
  padding: 18px;
  border-left: 4px solid var(--primary);
  background: var(--accent);
}

.site-footer {
  padding: 24px 0 36px;
  color: var(--muted);
  font-size: 0.9rem;
}

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

  .nav {
    gap: 10px 14px;
  }

  .main {
    padding-top: 38px;
  }

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

  .content {
    padding: 24px 18px;
  }
}