:root {
  --text-main: #444;
  --text-sub: #777;
  --card-bg: #fdf8ee;
  --card-border: #eee8d8;
  --accent: #f2b8c6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", "Segoe UI", sans-serif;
  color: var(--text-main);
  background: #ffffff;
  line-height: 1.8;
}

header {
  padding: 32px 16px 16px;
  text-align: center;
}

header h1 {
  font-size: 1.4rem;
  margin: 0;
  font-weight: 600;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

section {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
}

h2 {
  font-size: 1.1rem;
  margin-top: 0;
}

p { margin: 0 0 1em; }

ul {
  padding-left: 1.4em;
  margin: 0 0 1em;
}

a { color: var(--text-main); }

footer {
  text-align: center;
  padding: 24px 16px;
  font-size: 0.85rem;
  color: var(--text-sub);
  border-top: 1px solid #f0f0f0;
}

.top-bar {
  display: flex;
  justify-content: flex-end;
  max-width: 900px;
  margin: 0 auto;
  padding: 8px 16px 0;
}

.lang-switch {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.lang-switch a,
.lang-switch .lang-current {
  text-decoration: none;
  color: var(--text-sub);
  margin-left: 12px;
}

.lang-switch a:hover {
  color: var(--text-main);
}

.lang-current {
  font-weight: 600;
  color: var(--text-main);
  cursor: default;
}