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

body {
  font-family: "Trebuchet MS", Arial, sans-serif;
  line-height: 1.6;
  background-color: #cfd4d8;
  color: #111111;
}

.site-header {
  background-color: #111111;
  border-bottom: 3px solid #4f6f52;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: #e8ecef;
  font-size: 1.7rem;
  font-weight: bold;
  letter-spacing: 1px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  text-decoration: none;
  color: #e8ecef;
  font-weight: 600;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: #8fb996;
}

.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 3rem;
  line-height: 1.15;
  margin-bottom: 1rem;
  color: #111111;
}

.eyebrow {
  color: #355e3b;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.hero-description {
  font-size: 1.1rem;
  max-width: 650px;
  margin-bottom: 2rem;
  color: #222222;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-side {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.author-photo-card {
  width: 100%;
  max-width: 340px;
  background-color: #e8ecef;
  border: 2px solid #355e3b;
  border-radius: 18px;
  padding: 0.85rem;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.14);
}

.author-photo-card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: all 0.3s ease;
}

.btn-primary {
  background-color: #355e3b;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #2a4a2f;
}

.btn-secondary {
  background-color: transparent;
  color: #111111;
  border: 2px solid #355e3b;
}

.btn-secondary:hover {
  background-color: #355e3b;
  color: #ffffff;
}

.hero-card {
  width: 100%;
  max-width: 340px;
  background-color: #e8ecef;
  border: 2px solid #355e3b;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.hero-card h2 {
  margin-bottom: 1rem;
  color: #355e3b;
  font-size: 1.4rem;
}

.book-title {
  font-size: 1.3rem;
  font-weight: bold;
  margin-bottom: 0.75rem;
  color: #111111;
}

.content-section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.content-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: #1c3320;
}

.content-section p {
  font-size: 1.05rem;
  max-width: 750px;
}

.alt-section {
  background-color: rgba(255, 255, 255, 0.35);
  border-top: 1px solid rgba(53, 94, 59, 0.25);
  border-bottom: 1px solid rgba(53, 94, 59, 0.25);
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .nav-links {
    flex-direction: column;
    gap: 0.75rem;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 3.5rem 1.5rem;
  }

  .hero-text h1 {
    font-size: 2.2rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
}