@import url("https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&display=swap");

body {
  font-family: "Nunito", Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background-color: #eef3f9;
}

header,
footer {
  background: linear-gradient(135deg, #1e3a5f, #1d4ed8);
  color: white;
  padding: 1.5rem 1rem;
  text-align: center;
}

header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin: 0 0 0.5rem;
  letter-spacing: 1px;
  text-shadow: 2px 3px 0px rgba(0, 0, 0, 0.2);
}

footer {
  margin-top: 2rem;
  font-size: 0.9rem;
}

.main-nav {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
}

.main-nav li {
  padding: 6px;
}

.main-nav a {
  color: white;
  text-decoration: none;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.2);
  padding: 5px 14px;
  border-radius: 20px;
  transition:
    background 0.2s,
    transform 0.1s;
  display: inline-block;
}

.main-nav a:hover {
  background: rgba(255, 255, 255, 0.4);
  transform: scale(1.05);
}

#book-list {
  padding: 1rem 1.5rem;
}

.book {
  background: #ffffff;
  border: 3px solid #93c5fd;
  padding: 1.2rem;
  border-radius: 18px;
  max-width: 760px;
  margin: 24px auto;
  box-shadow: 5px 5px 0px #bfdbfe;
}

.book h2 {
  color: #b91c1c;
  font-size: 1.35rem;
  font-weight: 800;
  text-align: center;
  margin: 0 0 10px;
}

.book img {
  max-width: 100%;
  display: block;
  border-radius: 10px;
  margin: 0 auto 1rem;
  box-shadow: 3px 3px 8px rgba(0, 0, 0, 0.15);
}

.book-meta p {
  padding-left: 10px;
  margin: 6px 0;
  color: #374151;
  font-size: 0.95rem;
}

.book-meta p strong {
  color: #1d4ed8;
}

.book-desc {
  font-style: italic;
  color: #4b5563;
  padding-top: 6px;
  padding-left: 18px;
}

/* ═══════════════════════════════════════════════════════
   RESPONSIVE — 600px+ : Two-column card layout
   Left  → meta info (date, age, genre, rating)
   Right → title, image, description
   ═══════════════════════════════════════════════════════ */
@media (min-width: 600px) {
  /* Center the nav items in a row */
  .main-nav {
    display: grid;
    grid-template-columns: repeat(3, 110px);
    justify-content: center;
  }

  .book {
    display: grid;
    grid-template-columns: 1fr 2fr;
    grid-template-rows: auto 1fr auto;
    column-gap: 0;
    align-items: stretch;
  }

  .book-meta {
    grid-column: 1;
    grid-row: 1 / -1;
    border-right: 2px solid #bfdbfe;
    padding-right: 14px;
    align-self: stretch;
  }

  .book h2 {
    grid-column: 2;
    grid-row: 1;
    padding-left: 18px;
    text-align: center;
  }

  .book img {
    grid-column: 2;
    grid-row: 2;
    margin: 0 auto;
    padding: 0 8px 8px;
  }

  .book-desc {
    grid-column: 2;
    grid-row: 3;
    text-align: center;
  }
}