@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  --bg-color: #eef2f6; /* Soft Blue-Gray background */
  --card-bg: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --primary-blue: #60a5fa;
  --primary-blue-dark: #3b82f6;
  --border-light: rgba(226, 232, 240, 0.8);
  
  --shadow-soft: 0 4px 20px rgba(148, 163, 184, 0.15);
  --shadow-hover: 0 12px 30px rgba(148, 163, 184, 0.25);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
button, input { font-family: inherit; outline: none; border: none; background: none; }
button { cursor: pointer; }

/* Background Gradient */
.page-background {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100vh;
  background: radial-gradient(circle at top, #e0eaf5 0%, #eef2f6 50%);
  z-index: -1;
}

.container-app {
  max-width: 1536px;
  margin: 0 auto;
  padding: 32px 4vw;
}

/* =========================================
   HEADER (GLASSMORPHISM)
   ========================================= */
.glass-header {
  position: sticky;
  top: 24px;
  z-index: 100;
  margin-bottom: 48px;
}

.header-inner {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-soft);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav {
  display: flex;
  gap: 24px;
}

.main-nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
}

.main-nav a:hover, .main-nav a.active {
  color: var(--primary-blue-dark);
  background: rgba(96, 165, 250, 0.1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-bar {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.9);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-light);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

.search-icon {
  color: var(--text-secondary);
  margin-right: 12px;
  font-size: 0.9rem;
}

.search-bar input {
  font-size: 0.9rem;
  width: 200px;
  color: var(--text-primary);
}

.user-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--primary-blue);
  color: white;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 10px rgba(96, 165, 250, 0.4);
  transition: var(--transition);
}

.user-avatar:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(96, 165, 250, 0.5);
}

.d-mobile { display: none; }
.mobile-nav { display: none; }

/* =========================================
   HERO
   ========================================= */
.hero-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 60px;
  padding: 40px 0;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-tag {
  display: inline-block;
  background: white;
  color: var(--primary-blue-dark);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 20px;
  box-shadow: var(--shadow-soft);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -1.5px;
  line-height: 1.1;
}

.hero-title span {
  color: var(--primary-blue-dark);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.btn-secondary {
  background: white;
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
  position: relative;
}

.floating-img {
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(148, 163, 184, 0.3);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
  100% { transform: translateY(0px); }
}

/* =========================================
   FILTERS
   ========================================= */
.filter-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.filter-pills {
  display: flex;
  gap: 12px;
}

.pill {
  padding: 8px 24px;
  border-radius: var(--radius-pill);
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  box-shadow: 0 2px 5px rgba(0,0,0,0.02);
  transition: var(--transition);
}

.pill:hover, .pill.active {
  background: var(--text-primary);
  color: white;
  border-color: var(--text-primary);
}

.sort-dropdown {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  background: var(--card-bg);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-light);
}

/* =========================================
   BOOK GRID
   ========================================= */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.book-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-soft);
  border: 1px solid white;
  transition: var(--transition);
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.book-img-wrap {
  width: 100px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 2px 4px 10px rgba(0,0,0,0.1);
  cursor: pointer;
}

.book-img-wrap img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  transition: transform 0.5s;
}

.book-card:hover .book-img-wrap img {
  transform: scale(1.05);
}

.book-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.book-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
  cursor: pointer;
  line-height: 1.3;
}

.book-author {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.book-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: auto;
}

.book-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
}

.btn-borrow {
  background: var(--primary-blue-dark);
  color: white;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  transition: var(--transition);
}

.btn-borrow:hover {
  background: var(--primary-blue);
  box-shadow: 0 4px 10px rgba(96, 165, 250, 0.4);
}

.btn-view {
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
}
.btn-view:hover { color: var(--text-primary); }

.book-rating {
  font-size: 0.8rem;
  font-weight: 600;
  color: #f59e0b;
}

/* Pagination */
.pagination { display: flex; justify-content: center; gap: 8px; align-items: center; }
.page-btn, .page-next { background: var(--card-bg); padding: 8px 16px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.9rem; color: var(--text-secondary); border: 1px solid var(--border-light); transition: var(--transition);}
.page-btn:hover, .page-next:hover { color: var(--text-primary); border-color: var(--text-primary); }
.page-btn.active { background: var(--primary-blue-dark); color: white; border-color: var(--primary-blue-dark); }

/* =========================================
   CART PANEL & MODAL & TOAST
   ========================================= */
/* Similar soft style for Modal and Cart */
.cart-overlay, .modal-overlay {
  position: fixed; inset: 0; background: rgba(226, 232, 240, 0.8); backdrop-filter: blur(4px); z-index: 2000;
  opacity: 0; visibility: hidden; transition: var(--transition);
}
.cart-overlay.active, .modal-overlay.active { opacity: 1; visibility: visible; }

.cart-panel {
  position: fixed; top: 0; right: -420px; width: 100%; max-width: 400px; height: 100vh;
  background: var(--card-bg); z-index: 2100; display: flex; flex-direction: column;
  box-shadow: -10px 0 30px rgba(148, 163, 184, 0.2); transition: transform 0.4s ease;
}
.cart-panel.active { transform: translateX(-100%); }
.cart-header { padding: 24px; border-bottom: 1px solid var(--border-light); display: flex; justify-content: space-between; align-items: center; }
.cart-header h3 { font-size: 1.25rem; font-weight: 700; }
.close-cart { font-size: 1.5rem; color: var(--text-secondary); }
.cart-items { flex: 1; overflow-y: auto; padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.empty-cart { text-align: center; color: var(--text-secondary); margin-top: 50px; font-weight: 500; }

.cart-item { display: flex; gap: 16px; background: var(--bg-color); padding: 12px; border-radius: var(--radius-md); align-items: center; border: 1px solid var(--border-light);}
.cart-item img { width: 50px; height: 75px; object-fit: cover; border-radius: 4px; }
.cart-item-info h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.cart-item-info p { font-size: 0.8rem; color: var(--text-secondary); }
.cart-item-delete { color: #ef4444; opacity: 0.6; transition: 0.3s; padding: 8px;}
.cart-item-delete:hover { opacity: 1; }

.cart-footer { padding: 24px; border-top: 1px solid var(--border-light); }
.summary { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 16px; }
.btn-primary { background: var(--primary-blue-dark); color: white; width: 100%; padding: 14px; border-radius: var(--radius-pill); font-weight: 600; transition: var(--transition); }
.btn-primary:hover { background: var(--primary-blue); box-shadow: 0 4px 15px rgba(96, 165, 250, 0.4); }

.modal-content { background: var(--card-bg); border-radius: var(--radius-lg); width: 100%; max-width: 800px; position: relative; padding: 40px; box-shadow: var(--shadow-hover); transform: scale(0.95); transition: var(--transition); border: 1px solid white;}
.modal-overlay.active .modal-content { transform: scale(1); }
.modal-close { position: absolute; top: 24px; right: 24px; font-size: 1.5rem; color: var(--text-secondary); z-index: 10;}
.qv-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 40px; }
.qv-image img { width: 100%; border-radius: var(--radius-md); box-shadow: var(--shadow-soft); }
.qv-tag { background: #eef2f6; color: var(--primary-blue-dark); padding: 4px 12px; border-radius: var(--radius-pill); font-size: 0.75rem; font-weight: 700; display: inline-block; margin-bottom: 16px; }
.qv-info h2 { font-size: 2rem; font-weight: 700; margin-bottom: 8px; }
.qv-author { color: var(--text-secondary); margin-bottom: 24px; }
.qv-desc { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 32px; }

.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 12px; }
.toast { background: white; color: var(--text-primary); padding: 16px 24px; border-radius: var(--radius-pill); box-shadow: var(--shadow-soft); display: flex; align-items: center; gap: 12px; font-weight: 600; font-size: 0.9rem; transform: translateX(120%); opacity: 0; transition: all 0.4s; border: 1px solid var(--border-light); }
.toast.show { transform: translateX(0); opacity: 1; }
.toast.success i { color: var(--primary-blue-dark); }

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .search-bar { display: none; }
  .d-mobile { display: block; font-size: 1.25rem; color: var(--text-primary); padding: 8px; }
  .filter-pills { overflow-x: auto; padding-bottom: 12px; }
  
  .mobile-nav {
    display: none; flex-direction: column; background: var(--glass-bg); backdrop-filter: blur(12px);
    border-top: 1px solid var(--glass-border); padding: 16px; gap: 12px; border-radius: 0 0 var(--radius-md) var(--radius-md);
  }
  .mobile-nav.active { display: flex; }
  .mobile-nav a { font-weight: 600; padding: 12px; color: var(--text-primary); background: rgba(255,255,255,0.5); border-radius: var(--radius-sm); }
  
  .hero-section {
    flex-direction: column;
    text-align: center;
    gap: 32px;
  }
  
  .hero-actions {
    justify-content: center;
  }

  .qv-grid { grid-template-columns: 1fr; }
  .qv-image { max-width: 250px; margin: 0 auto; }
}

/* =========================================
   FOOTER
   ========================================= */
.atmica-footer {
  width: 100%;
  margin-top: 60px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--glass-border);
  box-shadow: 0 -4px 20px rgba(148, 163, 184, 0.1);
}

.footer-inner {
  max-width: 1536px;
  margin: 0 auto;
  padding: 40px 4vw;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 24px;
}

.footer-brand h2 {
  font-size: 1.5rem;
  color: var(--primary-blue-dark);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: var(--primary-blue-dark);
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .footer-content { flex-direction: column; text-align: center; }
}