body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Book card cover image */
.book-cover {
  height: 200px;
  object-fit: cover;
}

.book-cover-placeholder {
  height: 200px;
}

/* Subtle hover lift on cards */
.book-card {
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.book-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1) !important;
}

/* Navbar active link */
.navbar-nav .nav-link.active {
  font-weight: 600;
}