:root {
  --bg: #1a1a2e;
  --bg-surface: #16213e;
  --text: #e0e0e0;
  --text-muted: #8892a4;
  --accent: #e94560;
}

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

body {
  font-family: -apple-system, 'Hiragino Sans', 'Noto Sans JP', 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}

.nav-link {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
}

.nav-link:hover,
.nav-link.nav-active {
  color: var(--text);
}

h1 {
  font-size: 1.25rem;
  line-height: 1.5;
  margin-bottom: 8px;
}

.meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

h2 {
  font-size: 1.05rem;
  margin: 32px 0 10px;
  color: var(--accent);
}

h3 {
  font-size: 0.9rem;
  margin: 20px 0 6px;
  color: var(--text);
}

p, li {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

ul, ol {
  padding-left: 1.3em;
  margin-bottom: 12px;
}

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

strong {
  color: var(--text);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 16px;
  font-size: 0.8rem;
}

th, td {
  border: 1px solid #2a2a4a;
  padding: 8px 10px;
  text-align: left;
  color: var(--text-muted);
}

th {
  background: var(--bg-surface);
  color: var(--text);
  font-weight: 600;
}

.note {
  background: var(--bg-surface);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 12px 14px;
  margin: 16px 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.cta {
  display: block;
  text-align: center;
  margin: 36px 0 8px;
  padding: 14px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.post-card {
  display: block;
  background: var(--bg-surface);
  border-radius: 10px;
  padding: 16px 18px;
  text-decoration: none;
}

.post-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.post-card-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.post-card-date {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
  font-size: 0.7rem;
}

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