body {
  background-color: #f8f8f5;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", serif;
  color: #333;
  margin: 0;
  padding: 0;
}

.header {
  text-align: center;
  padding: 1.5rem 0;
}

.site-logo {
  width: 180px;
  height: auto;
}

.language-switcher {
  text-align: center;
  margin-top: 1rem;
  font-size: 1rem;
}

.language-switcher a {
  color: #333;
  text-decoration: none;
  margin: 0 0.4rem;
  font-weight: 600;
}

.lang-separator {
  margin: 1rem auto 2rem;
  width: 90%;
  border: none;
  border-top: 1px solid #ccc;
}

.content {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

.main-title {
  font-size: 1.9rem;
  text-align: center;
  margin-top: 1.5rem;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.intro {
  background: #fff;
  padding: 1.8rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  margin-top: 1.5rem;
}

.intro p {
  font-size: 1.1rem;
  line-height: 1.9;
  margin-bottom: 1.8rem;
}

.atelier-section h2 {
  font-size: 1.4rem;
  margin-top: 2.2rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.atelier-section p {
  font-size: 1.1rem;
  line-height: 1.8;
}

.footer {
  text-align: center;
  margin-top: 3rem;
  padding-bottom: 2rem;
  font-size: 0.9rem;
  color: #777;
}

@media (max-width: 600px) {
  .site-logo {
    width: 150px;
  }
  .main-title {
    font-size: 1.6rem;
    line-height: 1.4;
  }
  .intro {
    padding: 1.4rem;
  }
  .intro p {
    font-size: 1rem;
  }
  .atelier-section h2 {
    font-size: 1.25rem;
  }
  .atelier-section p {
    font-size: 1rem;
  }
}