* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f5f5f5;
  color: #222;
  line-height: 1.6;
}
a { color: #1a4d8f; text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
.container {
  width: 92%;
  max-width: 1180px;
  margin: 0 auto;
}
header {
  background: #111;
  color: #fff;
  padding: 20px 0;
  border-bottom: 4px solid #444;
}
.site-title {
  margin: 0;
  font-size: 34px;
  letter-spacing: 0.5px;
}
.site-title a { color: #fff; text-decoration: none; }
.site-tagline {
  margin: 6px 0 0;
  color: #d0d0d0;
  font-size: 15px;
}
nav {
  background: #222;
  border-bottom: 1px solid #3a3a3a;
}
nav .container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 0;
}
nav a {
  color: #fff;
  padding: 8px 12px;
  background: #333;
  border-radius: 4px;
  font-size: 14px;
}
nav a:hover {
  background: #444;
  text-decoration: none;
}
.hero {
  background: #fff;
  padding: 40px 0 34px;
  border-bottom: 1px solid #ddd;
}
.hero h2 {
  margin: 0 0 12px;
  font-size: 36px;
}
.hero p {
  margin: 0;
  max-width: 860px;
  color: #555;
  font-size: 18px;
}
.section {
  padding: 34px 0;
}
.section-title {
  margin: 0 0 20px;
  font-size: 28px;
  border-bottom: 2px solid #ddd;
  padding-bottom: 8px;
}
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
}
.book-card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}
.book-cover {
  display: block;
  width: 100%;
  height: 360px;
  object-fit: contain;
  background: #ddd;
}
.book-content {
  padding: 18px;
}
.series-name {
  margin: 0 0 8px;
  font-size: 12px;
  text-transform: uppercase;
  color: #777;
  letter-spacing: 1px;
}
.book-title {
  margin: 0 0 10px;
  font-size: 22px;
}
.book-short {
  margin: 0 0 16px;
  color: #555;
  font-size: 15px;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.button {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 4px;
  background: #1a4d8f;
  color: #fff;
  font-weight: bold;
  font-size: 14px;
}
.button:hover {
  background: #143b6d;
  text-decoration: none;
}
.button.secondary {
  background: #666;
}
.button.secondary:hover {
  background: #4f4f4f;
}
.book-page {
  background: #fff;
  padding: 32px;
  border: 1px solid #ddd;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  margin: 34px 0;
}
.book-page-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 30px;
}
.book-page-cover {
  width: 100%;
  max-width: 300px;
  height: 450px;
  border: 1px solid #ccc;
  display: block;
  object-fit: contain;
  background: #ddd;
}
.book-page h1 {
  margin-top: 0;
  margin-bottom: 14px;
  font-size: 38px;
}
.book-description {
  font-size: 17px;
  color: #444;
  margin-bottom: 20px;
}
.details-box {
  background: #f8f8f8;
  border: 1px solid #ddd;
  padding: 16px;
  margin-top: 22px;
}
.details-box h2 {
  margin: 0 0 10px;
  font-size: 18px;
}
.details-box p {
  margin: 6px 0;
}
.back-link {
  display: inline-block;
  margin-bottom: 18px;
  font-weight: bold;
}
.about-box {
  background: #fff;
  border: 1px solid #ddd;
  padding: 24px;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}
.book-list {
  columns: 2;
  column-gap: 30px;
}
.book-list li { margin-bottom: 8px; }
footer {
  background: #111;
  color: #ddd;
  padding: 24px 0;
  margin-top: 30px;
}
footer p {
  margin: 0;
  font-size: 14px;
}
@media (max-width: 860px) {
  .book-page-layout {
    grid-template-columns: 1fr;
  }
  .book-page-cover {
    max-width: 260px;
  }
  .hero h2 {
    font-size: 28px;
  }
  .site-title {
    font-size: 28px;
  }
  .book-list { columns: 1; }
}