* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Lato', sans-serif;
  color: #333;
  background: #fff;
  display: flex;
  min-height: 100vh;
}

a {
  color: #1e6c93;
  text-decoration: underline;
}

a:hover {
  color: #185676;
}

/* Sidebar Navigation */
.sidebar {
  width: 250px;
  min-height: 100vh;
  background: #212121;
  color: #fff;
  padding: 48px 0 24px;
  position: fixed;
  top: 0;
  left: 0;
  overflow-y: auto;
  z-index: 100;
}

.sidebar .site-title {
  display: block;
  color: #fff;
  font-size: 19pt;
  font-weight: 300;
  letter-spacing: 1px;
  line-height: 1.3;
  padding: 11.5px 36px 62.5px 48px;
  text-decoration: none;
}

.sidebar .site-title:hover {
  color: #fff;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar ul li a {
  display: block;
  color: rgba(255, 255, 255, 0.8);
  font-family: 'Lato', sans-serif;
  font-size: 12pt;
  font-weight: 300;
  padding: 11.5px 48px;
  text-decoration: none;
  transition: background 0.2s;
}

.sidebar ul li a:hover,
.sidebar ul li a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

/* Main Content */
.main-content {
  margin-left: 250px;
  flex: 1;
  min-height: 100vh;
}

/* Header */
.header {
  background: #1e6c93;
  color: #fff;
  padding: 48px;
}

.header h1 {
  font-family: 'Lato', sans-serif;
  font-size: 19pt;
  font-weight: 300;
  letter-spacing: 1px;
  line-height: 1.3;
}

/* Page Content */
.page-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 48px;
}

.page-heading {
  font-family: 'Lato', sans-serif;
  font-size: 34pt;
  font-weight: 300;
  letter-spacing: 0.5px;
  line-height: 1.2;
  color: #1e6c93;
  margin-top: 30px;
  margin-bottom: 20px;
}

.section-title {
  font-family: 'Lato', sans-serif;
  font-size: 19pt;
  font-weight: 400;
  line-height: 1.4;
  color: #1e6c93;
  margin-top: 20px;
  margin-bottom: 10px;
}

.subsection-title {
  font-family: 'Lato', sans-serif;
  font-size: 15pt;
  font-weight: 400;
  line-height: 1.25;
  color: #333;
  margin-top: 16px;
  margin-bottom: 8px;
}

p {
  font-family: 'Lato', sans-serif;
  font-size: 11pt;
  font-weight: 400;
  line-height: 1.6667;
  margin-top: 12px;
  color: #333;
}

small {
  font-family: 'Lato', sans-serif;
  font-size: 9pt;
  line-height: 1.2;
}

ul {
  margin: 12px 0;
  padding-left: 24px;
}

li {
  font-family: 'Lato', sans-serif;
  font-size: 11pt;
  font-weight: 400;
  line-height: 1.6667;
  margin-top: 6px;
}

/* Images */
.content-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 20px auto;
}

.content-image-left {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 20px;
}

/* Hero Section */
.hero-section {
  background: #1e6c93;
  color: #fff;
  padding: 60px 48px;
  text-align: center;
}

.hero-section h1 {
  font-family: 'Lato', sans-serif;
  font-size: 45pt;
  font-weight: 300;
  line-height: 1.1;
  color: #fff;
  margin: 0;
}

/* Footer Book Section */
.footer-book {
  max-width: 1000px;
  margin: 40px auto;
  padding: 20px 48px;
  display: flex;
  gap: 30px;
  align-items: flex-start;
  border-top: 1px solid #e0e0e0;
  padding-top: 40px;
}

.footer-book-image {
  flex-shrink: 0;
}

.footer-book-image img {
  max-width: 180px;
  height: auto;
}

.footer-book-content {
  flex: 1;
}

.footer-book-content h3 {
  font-family: 'Lato', sans-serif;
  font-size: 15pt;
  font-weight: 400;
  line-height: 1.25;
  color: #1e6c93;
  margin-top: 0;
  margin-bottom: 8px;
}

.footer-book-content small {
  display: block;
  font-size: 9pt;
  line-height: 1.4;
  color: #555;
  text-align: left;
}

/* Meta Info Box */
.meta-box {
  background: #eee;
  padding: 20px 24px;
  margin: 20px 0;
  border-radius: 2px;
}

.meta-box p {
  margin: 4px 0;
  font-size: 11pt;
}

.meta-box strong {
  font-weight: 700;
}

.tags {
  margin-top: 8px;
}

.tags span {
  display: inline-block;
  background: #1e6c93;
  color: #fff;
  padding: 2px 10px;
  border-radius: 3px;
  font-size: 9pt;
  margin: 2px;
}

/* Responsive */
@media (max-width: 768px) {
  body {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    min-height: auto;
    position: static;
    padding: 20px;
  }

  .sidebar .site-title {
    padding: 0 0 20px;
    font-size: 15pt;
  }

  .sidebar ul li a {
    padding: 8px 20px;
  }

  .main-content {
    margin-left: 0;
  }

  .header {
    padding: 24px;
  }

  .page-content {
    padding: 20px 24px;
  }

  .page-heading {
    font-size: 24pt;
  }

  .footer-book {
    flex-direction: column;
    padding: 20px 24px;
  }

  .footer-book-image img {
    max-width: 120px;
  }

  .hero-section {
    padding: 30px 24px;
  }

  .hero-section h1 {
    font-size: 30pt;
  }
}