/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f4f4;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 1rem;
}

/* Header */
header {
  background-color: #4b0082;
  color: white;
  padding: 0.5rem 0;
  text-align: center;
}

.header-content h1 {
  margin-bottom: 1rem;
}

.search-bar {
  padding: 0.6rem;
  width: 80%;
  max-width: 400px;
  border-radius: 5px;
  border: none;
  font-size: 1rem;
  background-color: #eee;
}

/* Genre Filter Buttons */
.genre-filter {
  text-align: center;
  margin: 2rem 0;
}

.filter-btn {
  background-color: #ddd;
  border: none;
  padding: 0.6rem 1rem;
  margin: 0.5rem;
  cursor: not-allowed; /* since not functional yet */
  border-radius: 20px;
  font-weight: bold;
  transition: 0.3s;
}

.filter-btn:hover {
  background-color: #bbb;
}

.filter-btn.active {
  background-color: #4b0082;
  color: white;
}

/* Book Cards Grid */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
}

.book-card {
  background-color: white;
  border-radius: 10px;
  padding: 1rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  text-align: center;
  transition: transform 0.3s;
}

.book-card:hover {
  transform: translateY(-5px);
}

.book-card img {
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.book-card h3 {
  margin: 0.8rem 0 0.4rem;
  font-size: 1.1rem;
}

.book-card .genre {
  font-style: italic;
  color: #666;
}

.price {
  color: #b12704;
  font-weight: bold;
  display: block;
  margin-top: 0.5rem;
}

/* No Results */
.no-results {
  display: none; /* Simulated; enable via JS later */
  text-align: center;
  font-size: 1.2rem;
  padding: 2rem;
  color: #888;
}

/* Footer */
footer {
  background-color: #4b0082;
  color: white;
  text-align: center;
  padding: 1rem 0;
  margin-top: 3rem;
}

/* Responsive */
@media (max-width: 600px) {
  .search-bar {
    width: 100%;
  }

  .filter-btn {
    width: 100%;
    max-width: 300px;
  }
}