body {
  font-family: sans-serif;
  margin: 0;
  background: #f9f9f9;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
/* Nav Layout */
header {
  background: #222;
  color: white;
  padding: 1rem 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
}

.nav-left h1 {
  margin: 0;
  font-size: 1.5rem;
  white-space: nowrap;
}

#searchInput {
  padding: 0.5rem;
  border-radius: 4px;
  border: none;
  width: 100%;
  max-width: 300px;
}

.nav-tabs {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}

.nav-tabs a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: background 0.2s ease;
}

.nav-tabs a:hover,
.nav-tabs a.active {
  background: #444;
}


main#bookGrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  padding: 2rem;
}

.book-card {
  background: white;
  border-radius: 6px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  padding: 1rem;
  text-align: center;
}

.book-card img {
  width: 100%;
  max-height: 250px;
  object-fit: cover;
  border-radius: 4px;
}

.book-card h2 {
  font-size: 1rem;
  margin: 0.5rem 0 0.25rem;
}

.book-card p {
  font-size: 0.875rem;
  color: #666;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #eee;
  margin-top: auto;
}
/* Sidebar */
.sidebar {
  width: 250px;
  background-color: #f4f4f4;
  padding: 20px;
  border-right: 1px solid #ddd;
  height: 100vh;
  box-sizing: border-box;
  position: fixed;
  left: 0;
  top: 0;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  z-index: 1000;
}

.sidebar.open {
  transform: translateX(0);
}

.menu-btn {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1100;
  background: #222;
  color: white;
  font-size: 24px;
  border: none;
  border-radius: 4px;
  padding: 6px 10px;
  cursor: pointer;
}
.close-btn {
  background: none;
  border: none;
  font-size: 28px;
  color: #333;
  float: right;
  cursor: pointer;
  margin-bottom: 10px;
}



#bookGrid {
  margin-left: 0;
  transition: margin-left 0.3s ease;
}

.sidebar.open ~ main#bookGrid {
  margin-left: 260px;
}

.clear-filters-btn {
  padding: 8px 12px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  margin-top: 20px;
  cursor: pointer;
  width: 100%;
  font-size: 1rem;
}

.clear-filters-btn:hover {
  background-color: #45a049;
}