/* Universal Book Card Styles - Overlay Design */

.ubook-card {
  display: block;
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  background: white;
  text-decoration: none;
  color: inherit;
  max-width: 100%;
  aspect-ratio: 2/3;
}

.ubook-card img {
  width: 100%;
  height: 100%;
  object-fit: fill;
  display: block;
  transition: transform 0.5s ease;
}

.ubook-card .overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.5) 60%, rgba(0,0,0,0) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 15px;
  box-sizing: border-box;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.ubook-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}
.ubook-card:hover img { transform: scale(1.1); }
.ubook-card:hover .overlay { opacity: 1; }

.text-content {
  transform: translateY(20px);
  transition: transform 0.3s ease;
  text-align: left;
  margin-bottom: 10px;
}

.ubook-card h4 {
  margin: 0 0 5px 0;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}

.author-name {
  font-size: 13px;
  color: #FFBF00;
  font-weight: 500;
  display: block;
}

.btn-visual {
  display: block;
  text-align: center;
  width: 100%;
  padding: 10px 0;
  background: #6c5ce7;
  color: white;
  border-radius: 6px;
  font-weight: bold;
  font-size: 14px;
  transform: translateY(20px);
  transition: transform 0.3s 0.1s ease, background 0.2s;
}

.ubook-card:hover .btn-visual {
  background: #a29bfe;
}

.ubook-card:hover .text-content,
.ubook-card:hover .btn-visual {
  transform: translateY(0);
}

.book-grid {
  display: grid;
  max-width: 1200px;
  margin: 0 auto;
  gap: 15px;
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 600px) {
  .book-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
}

@media (min-width: 1024px) {
  .book-grid { grid-template-columns: repeat(5, 1fr); gap: 25px; }
}

/* Header Styles */
.header {
  text-align: center;
  margin-bottom: 30px;
  color: #2c3e50;
}

.header h2 {
  margin: 0;
  font-size: 2rem;
  font-weight: 700;
}

@media (max-width: 600px) {
  .ubook-card h4 { font-size: 14px; }
  .author-name { font-size: 11px; }
  .btn-visual { padding: 8px 0; font-size: 12px; }
  .ubook-card .overlay { padding: 10px; }
  .header h2 { font-size: 1.5rem; }
}

/* Universal Cards Grid - for backward compatibility */
.universal-cards-grid {
  display: grid;
  gap: 15px;
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 600px) {
  .universal-cards-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
}

@media (min-width: 1024px) {
  .universal-cards-grid { grid-template-columns: repeat(5, 1fr); gap: 25px; }
}

/* Responsive Grid Classes */
.universal-cards-grid.cols-6 { grid-template-columns: repeat(5, 1fr); }
.universal-cards-grid.cols-5 { grid-template-columns: repeat(5, 1fr); }
.universal-cards-grid.cols-4 { grid-template-columns: repeat(5, 1fr); }
.universal-cards-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.universal-cards-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.universal-cards-grid.cols-1 { grid-template-columns: 1fr; }

@media (max-width: 768px) {
  .universal-cards-grid.cols-6,
  .universal-cards-grid.cols-5,
  .universal-cards-grid.cols-4,
  .universal-cards-grid.cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .universal-cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}