:root {
  --pink: #FFE5E5;
  --text: #222;
  --muted: #666;
  --line: #f0f0f0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Helvetica Neue", sans-serif;
  background: var(--pink);
  color: var(--text);
  line-height: 1.7;
  padding: 24px 16px;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  background: white;
  border-radius: 18px;
  padding: 48px 32px;
  box-shadow: 0 4px 20px rgba(0,0,0,.04);
}

header {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

header .logo {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
}

header .sub {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

h1 {
  font-size: 22px;
  margin-bottom: 8px;
}

.last-updated {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 16px;
}

.intro {
  font-size: 14px;
  color: #444;
  margin-bottom: 20px;
}

section {
  margin-top: 24px;
}

section h2 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--text);
}

section p {
  font-size: 13px;
  color: #444;
  margin-bottom: 8px;
}

section ul {
  list-style: none;
  padding-left: 4px;
}

section ul li {
  font-size: 13px;
  color: #444;
  margin-bottom: 4px;
  padding-left: 16px;
  position: relative;
}

section ul li::before {
  content: "・";
  position: absolute;
  left: 0;
}

.note {
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
  margin-top: 4px;
}

footer {
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  line-height: 1.8;
}

footer a {
  color: #78C85A;
  text-decoration: none;
}

nav {
  text-align: center;
  margin-bottom: 24px;
}

nav a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  color: #78C85A;
  text-decoration: none;
  border: 1px solid #78C85A;
  border-radius: 18px;
  margin: 0 4px;
}

nav a:hover {
  background: #78C85A;
  color: white;
}

.lang-switch {
  text-align: right;
  margin-bottom: 16px;
  font-size: 12px;
}

.lang-switch a {
  display: inline-block;
  padding: 4px 12px;
  margin-left: 4px;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: all .15s ease;
}

.lang-switch a:hover {
  border-color: #78C85A;
  color: #78C85A;
}

.lang-switch a.active {
  background: #78C85A;
  color: white;
  border-color: #78C85A;
}

.home-cards {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.home-card {
  display: block;
  padding: 20px 24px;
  background: #FAFAFA;
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--line);
  transition: transform .15s ease, box-shadow .15s ease;
}

.home-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,.05);
}

.home-card .title {
  font-weight: 700;
  font-size: 16px;
}

.home-card .desc {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
}