:root {
  --text: #222;
  --muted: #666;
  --bg: #fff;
  --accent: #2f6f5e;
  --line: #e5e5e5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
}

a { color: var(--accent); }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.logo {
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--text);
}
nav a {
  margin-left: 16px;
  text-decoration: none;
  color: var(--text);
}
nav a:first-child { margin-left: 0; }

.hero {
  background: var(--accent);
  color: #fff;
  padding: 72px 0;
  text-align: center;
}
.hero h1 { margin: 0 0 8px; }

main > section.container { padding-top: 48px; padding-bottom: 16px; }

.news { list-style: none; padding: 0; }
.news li { border-bottom: 1px solid var(--line); padding: 8px 0; }
.news time { color: var(--muted); margin-right: 12px; }

.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  padding: 24px 0;
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
}

.notfound { text-align: center; padding: 96px 16px; }