:root {
  --text: #1c1c1e;
  --muted: #6e6e73;
  --bg: #ffffff;
  --card: #f5f5f7;
  --accent: #2c6e9b;
  --border: #e3e3e6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f2f2f7;
    --muted: #a1a1a6;
    --bg: #1c1c1e;
    --card: #2c2c2e;
    --accent: #6cb2e0;
    --border: #3a3a3c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 24px 16px 64px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.8;
  font-size: 16px;
}

main {
  max-width: 760px;
  margin: 0 auto;
}

h1 {
  font-size: 1.6rem;
  margin: 0 0 8px;
}

h2 {
  font-size: 1.15rem;
  margin: 32px 0 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

p {
  margin: 8px 0;
  white-space: pre-line;
}

ul {
  margin: 8px 0;
  padding-left: 1.4em;
}

li {
  margin: 4px 0;
}

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

.dates {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.intro {
  color: var(--muted);
  font-size: 0.95rem;
}

.contact {
  margin-top: 40px;
  padding: 16px;
  background: var(--card);
  border-radius: 12px;
}

.nav {
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.nav a {
  margin-right: 16px;
}

.card-links {
  list-style: none;
  padding: 0;
}

.card-links li {
  margin: 12px 0;
}

.card-links a {
  display: block;
  padding: 16px;
  background: var(--card);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border);
}

.card-links a:hover {
  border-color: var(--accent);
}

footer {
  margin-top: 48px;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}