body {
  line-height: 1.4;
  font-size: 16px;
  padding: 0 10px;
  margin: 50px auto;
  max-width: 650px;
  font-family: "Inter", sans-serif;
}

#maincontent {
  max-width: 42em;
  margin: 15px auto;
}

.header-container {
  margin-bottom: 28px;
}

.header-container h2 {
  margin: 0;
}

.site-title {
  color: #000;
  font-weight: 700;
}

.page-title {
  color: #666;
  font-weight: 400;
}

.site-nav {
  font-size: 0.9em;
}

.site-nav {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  overflow-x: auto;
  white-space: nowrap;
}

.book-list li {
  margin: 6px 0;
}

.essay-section {
  border: 1px solid #ccc;
  padding: 10px;
  margin-top: 20px;
}

@media (max-width: 600px) {
  .header-container h2 {
    margin-bottom: 10px;
  }

  .site-nav {
    flex-wrap: wrap;
    overflow-x: visible;
    row-gap: 6px;
    white-space: normal;
  }
}