/* Library View - Modern Glassmorphism Design */

.library-container {
  min-height: 100vh;
  background: var(--hero-gradient);
  position: relative;
  overflow-x: hidden;
}

.library-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255,255,255,0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(255,255,255,0.03) 0%, transparent 50%);
  animation: floatingParticles 20s ease-in-out infinite;
}

@keyframes floatingParticles {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: var(--space-12) var(--space-6) var(--space-16);
  text-align: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.hero-gradient {
  width: 100%;
  height: 100%;
  background: var(--hero-gradient);
  animation: gradientShift 15s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-content {
  max-width: var(--max-width-lg);
  margin: 0 auto;
  position: relative;
}

.hero-glass-card {
  background: var(--glass-bg-primary);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: var(--space-10);
  box-shadow: var(--glass-shadow);
  animation: float 6s ease-in-out infinite;
  margin-bottom: var(--space-8);
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 200%;
  animation: textGradient 8s ease-in-out infinite;
}

@keyframes textGradient {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-title-main {
  display: block;
  color: var(--text-primary);
  -webkit-text-fill-color: var(--text-primary);
}

.hero-subtitle {
  font-size: var(--fs-headline);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-top: var(--space-6);
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--fs-caption-1);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

/* Floating Action Button */
.fab-main {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border: none;
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(138, 43, 226, 0.3);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
}

.fab-main:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 12px 32px rgba(138, 43, 226, 0.4);
}

.fab-icon {
  font-size: 24px;
  line-height: 1;
}

.fab-label {
  font-size: var(--fs-caption-2);
  font-weight: 600;
  color: white;
  white-space: nowrap;
}

/* Content Section */
.content-section {
  padding: 0 var(--space-6) var(--space-12);
  max-width: var(--max-width-xl);
  margin: 0 auto;
  position: relative;
}

.library-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

/* Search Bar */
.search-bar-glass {
  background: var(--glass-bg-secondary);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: var(--space-4);
  box-shadow: var(--glass-shadow);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  position: sticky;
  top: 80px;
  z-index: 10;
}

.search-input-wrapper {
  flex: 1;
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
  background: var(--glass-bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  font-size: var(--fs-body);
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s ease;
}

.search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.1);
  background: var(--glass-bg-primary);
}

.search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--text-tertiary);
  transition: color 0.3s ease;
}

.search-input:focus + .search-icon {
  color: var(--accent-primary);
}

.filter-buttons {
  display: flex;
  gap: var(--space-2);
}

.filter-btn {
  padding: var(--space-2) var(--space-4);
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: var(--fs-caption-1);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-btn:hover {
  background: var(--glass-bg-tertiary);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.filter-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(138, 43, 226, 0.3);
}

/* Books Grid */
.books-masonry {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.dropzone-wrapper {
  grid-column: 1 / -1;
  margin-bottom: var(--space-6);
}

.books-section {
  flex: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section {
    padding: var(--space-8) var(--space-4);
  }

  .hero-glass-card {
    padding: var(--space-6);
  }

  .hero-title {
    font-size: clamp(2rem, 12vw, 3.5rem);
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
  }

  .fab-main {
    bottom: var(--space-4);
    right: var(--space-4);
    width: 56px;
    height: 56px;
  }

  .search-bar-glass {
    flex-direction: column;
    gap: var(--space-4);
  }

  .filter-buttons {
    justify-content: center;
    flex-wrap: wrap;
  }

  .books-masonry {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-4);
  }
}

@media (max-width: 480px) {
  .hero-section {
    padding: var(--space-6) var(--space-3);
  }

  .hero-subtitle {
    font-size: var(--fs-body);
  }

  .books-masonry {
    grid-template-columns: 1fr;
  }

  .empty-state-icon {
    font-size: 60px;
  }

  .empty-state-actions {
    flex-direction: column;
    width: 100%;
  }

  .empty-state-action {
    width: 100%;
    text-align: center;
  }
}

/* Dark mode enhancements */
[data-theme="dark"] .hero-section {
  /* Enhanced dark mode gradients */
  --hero-gradient: linear-gradient(135deg,
    rgba(138, 43, 226, 0.2) 0%,
    rgba(30, 144, 255, 0.2) 25%,
    rgba(0, 255, 128, 0.2) 50%,
    rgba(255, 165, 0, 0.2) 75%,
    rgba(255, 20, 147, 0.2) 100%
  );
}

[data-theme="dark"] .empty-state::before {
  background: var(--glass-bg-tertiary);
  border-color: rgba(142, 142, 147, 0.4);
}

/* Empty State - Glassmorphism Design */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-6);
  text-align: center;
  position: relative;
}

.empty-state::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 200px;
  background: var(--glass-bg-secondary);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: var(--glass-shadow);
  z-index: -1;
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.8; }
  50% { transform: translate(-50%, -50%) scale(1.05); opacity: 1; }
}

.empty-state-icon {
  font-size: 72px;
  margin-bottom: var(--space-6);
  opacity: 0.8;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

.empty-state-title {
  font-size: var(--fs-title-1);
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.empty-state-text {
  font-size: var(--fs-headline);
  color: var(--text-secondary);
  max-width: 400px;
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-8);
}

.empty-state-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
}

.empty-state-action {
  padding: var(--space-4) var(--space-6);
  background: var(--glass-bg-primary);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--fs-body);
  transition: all 0.3s ease;
  box-shadow: var(--glass-shadow);
}

.empty-state-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--separator-color);
}

.library-title {
  font-size: var(--fs-large-title);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: 0.01em;
  line-height: var(--line-height-tight);
}

.library-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.library-stats {
  font-size: var(--fs-caption-1);
  color: var(--text-quaternary);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}

.book-card {
  background: var(--glass-bg-primary);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: var(--space-6);
  box-shadow: var(--glass-shadow);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  animation: slideInUp 0.6s ease-out both;
  animation-delay: calc(var(--card-index, 0) * 0.1s);
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.book-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg,
    rgba(138, 43, 226, 0.05) 0%,
    rgba(30, 144, 255, 0.05) 50%,
    rgba(0, 255, 128, 0.05) 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  border-radius: 20px;
}

.book-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  border-color: var(--accent-primary);
}

.book-card:hover::before {
  opacity: 1;
}

.book-card:active {
  transform: translateY(-4px) scale(0.98);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* Enhanced animations */
.book-card.animate-in {
  animation: slideInUpEnhanced 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  animation-delay: calc(var(--card-index, 0) * 0.15s);
}

@keyframes slideInUpEnhanced {
  0% {
    opacity: 0;
    transform: translateY(50px) scale(0.9);
    filter: blur(10px);
  }
  70% {
    opacity: 0.8;
    transform: translateY(-5px) scale(1.02);
    filter: blur(0px);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0px);
  }
}

/* Floating elements animation */
.floating-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  overflow: hidden;
}

.floating-particles::before,
.floating-particles::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  animation: floatParticle 15s linear infinite;
}

.floating-particles::before {
  width: 80px;
  height: 80px;
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.floating-particles::after {
  width: 60px;
  height: 60px;
  top: 60%;
  right: 15%;
  animation-delay: -7.5s;
}

@keyframes floatParticle {
  0% { transform: translateY(0px) rotate(0deg); }
  33% { transform: translateY(-20px) rotate(120deg); }
  66% { transform: translateY(-40px) rotate(240deg); }
  100% { transform: translateY(0px) rotate(360deg); }
}

.book-cover {
  font-size: 56px;
  text-align: center;
  margin-bottom: var(--space-5);
  line-height: 1;
  color: var(--text-tertiary);
  transition: color var(--ms-duration-fast) var(--curve-spring);
}

.book-card:hover .book-cover {
  color: var(--apple-blue);
}

.book-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.book-card-header .book-title {
  margin-bottom: 0;
  flex: 1;
  min-height: auto;
}

.btn-delete {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
  border-radius: 6px;
  opacity: 0;
  transition: all var(--ms-duration-fast) var(--curve-spring);
  color: var(--text-tertiary);
  font-size: 16px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.book-card:hover .btn-delete {
  opacity: 1;
  background: rgba(255, 59, 48, 0.1);
}

.btn-delete:hover {
  background: rgba(255, 59, 48, 0.15);
  color: var(--danger-color);
  transform: scale(1.1);
}

.btn-delete:active {
  transform: scale(0.95);
}

.book-title {
  font-size: var(--fs-headline);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
  line-height: var(--line-height-tight);
  letter-spacing: 0.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 40px;
}

.book-author {
  font-size: var(--fs-subhead);
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: var(--line-height-normal);
  font-weight: 400;
}

.book-description {
  font-size: var(--fs-caption-1);
  color: var(--text-tertiary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-5);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.book-meta {
  margin-top: auto;
  padding-top: var(--space-5);
  border-top: 1px solid var(--separator-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.book-meta-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.book-word-count {
  font-size: var(--fs-caption-2);
  color: var(--text-quaternary);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.book-format {
  font-size: var(--fs-caption-2);
  color: var(--apple-blue);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: var(--space-1) var(--space-2);
  background: rgba(0, 122, 255, 0.08);
  border-radius: 4px;
  align-self: flex-start;
}

.book-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-3);
}

.book-tag {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: var(--space-1) var(--space-2);
  border-radius: 6px;
  font-size: var(--fs-caption-2);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-13);
  background: var(--bg-secondary);
  border-radius: 20px;
  border: 2px dashed var(--border-color);
  margin: var(--space-8) 0;
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: var(--space-5);
  color: var(--text-quaternary);
}

.empty-state-title {
  font-size: var(--fs-title-1);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: 0.01em;
}

.empty-state-text {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
  max-width: 320px;
  margin: 0 auto var(--space-6) auto;
}

.empty-state-action {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--apple-blue);
  color: #FFFFFF;
  padding: var(--space-4) var(--space-6);
  border-radius: 12px;
  font-weight: 600;
  font-size: var(--fs-callout);
  text-decoration: none;
  transition: all var(--ms-duration-fast) var(--curve-spring);
}

.empty-state-action:hover {
  background: #005BD3;
  transform: translateY(-1px);
  box-shadow: var(--shadow-base);
}

/* Focus states */
.book-card:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Dark theme adjustments */
[data-theme='dark'] .library-header {
  border-bottom-color: var(--separator-color);
}

[data-theme='dark'] .book-card {
  border-color: var(--border-color);
}

[data-theme='dark'] .book-card:hover .book-cover {
  color: var(--apple-blue);
}

[data-theme='dark'] .book-meta {
  border-top-color: var(--separator-color);
}

[data-theme='dark'] .book-tag {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
}

[data-theme='dark'] .empty-state {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
}

/* Mobile responsive */
@media (max-width: 640px) {
  .library-container {
    padding: var(--space-6) var(--space-4);
  }

  .library-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
  }

  .library-title {
    font-size: var(--fs-title-1);
  }

  .books-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-4);
  }

  .book-card {
    padding: var(--space-5);
  }

  .book-cover {
    font-size: 48px;
    margin-bottom: var(--space-4);
  }

  .book-title {
    font-size: var(--fs-callout);
    -webkit-line-clamp: 3;
    min-height: 60px;
  }

  .book-description {
    display: none;
  }

  .empty-state {
    padding: var(--space-10);
    margin: var(--space-6) 0;
  }

  .empty-state-title {
    font-size: var(--fs-title-2);
  }
}