body {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  background: #f8f5ef;
  color: #222;
  line-height: 1.7;
  font-size: 1.3rem;
}

header {
  padding: 2rem 8%;
  border-bottom: 1px solid #d8d2c8;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

nav .links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9em;
  letter-spacing: 0.04em;
}

nav a {
  color: inherit;
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 6rem 8%;
}

.book-cover {
  border: 1px solid #d4cec4;
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
  overflow: hidden;
  border-radius: 2px;
  max-width: 420px;
}

.book-cover img {
  display: block;
  width: 100%;
  height: auto;
}

h1, h2 {
  font-weight: normal;
  letter-spacing: 0.02em;
}

h1 {
  font-size: 3.3rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

section {
  padding: 4rem 8%;
  max-width: 1100px;
  margin: auto;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.principle {
  border-top: 1px solid #b8b0a2;
  padding-top: 1rem;
}

blockquote {
  font-size: 1.8rem;
  font-style: italic;
  border-left: 2px solid #b8b0a2;
  padding-left: 1.5rem;
  margin: 0;
  color: #444;
}

footer {
  padding: 3rem 8%;
  border-top: 1px solid #d8d2c8;
  font-size: 1.2rem;
  color: #666;
}

@media (max-width: 900px) {
  .hero, .principles {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2.5rem;
  }
}