body {
  font-family: Inter, Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

html[lang="ja"] body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic Pro", sans-serif;
  font-size: 15px;
  line-height: 1.9;
}

html[lang="ja"] h1,
html[lang="ja"] h2,
html[lang="ja"] h3 {
  letter-spacing: 0.05em;
}

html[lang="vi"] h1,
html[lang="en"] h1 {
  letter-spacing: normal;
}