:root {
  --bg: #F6F5F2;
  --card: #FFFFFF;
  --text: #1C1C1E;
  --text-secondary: #3A3A3C;
  --text-tertiary: #8C8984;
  --border: #E4E0D9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  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;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.brand {
  text-align: center;
  margin-bottom: 48px;
}

.brand .logo {
  font-size: 40px;
  font-weight: 300;
  letter-spacing: 1px;
  margin: 0;
}

.brand .tagline {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--text-tertiary);
  margin: 6px 0 0;
}

.lang {
  text-align: right;
  font-size: 13px;
  margin: -24px 0 24px;
}

.lang a { color: var(--text-secondary); }

h1 {
  font-size: 24px;
  font-weight: 500;
  margin: 0 0 4px;
}

.updated {
  font-size: 13px;
  color: var(--text-tertiary);
  margin: 0 0 24px;
}

.lead {
  font-size: 15px;
  color: var(--text-secondary);
}

section { margin-top: 28px; }

h2 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 6px;
}

section p {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
  white-space: pre-line;
  overflow-wrap: anywhere;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 64px 0 48px;
}

.nav {
  text-align: center;
  margin-top: 48px;
  font-size: 14px;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.nav a:hover { text-decoration: underline; }

.home-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.home-links a {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  color: var(--text);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
}

.home-links a span {
  display: block;
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 400;
}

.home-links a:hover { border-color: var(--text); }

.contact {
  margin-top: 40px;
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
}