/* styles.css - Modern Design System for My Library (내 서재) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

:root {
  --bg-primary: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-elevated: #334155;
  --bg-glass: rgba(30, 41, 59, 0.75);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-focus: #6366f1;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-primary: #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99, 102, 241, 0.15);
  
  --status-read: #10b981;
  --status-reading: #3b82f6;
  --status-plan: #f59e0b;
  --status-wishlist: #ec4899;
  
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --glow-shadow: 0 0 20px rgba(99, 102, 241, 0.35);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f8fafc;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-color: #e2e8f0;
  --border-focus: #4f46e5;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-primary: #4f46e5;
  --accent-hover: #4338ca;
  --accent-light: rgba(79, 70, 229, 0.1);
  
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --glow-shadow: 0 0 20px rgba(79, 70, 229, 0.2);
}

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

body {
  font-family: 'Inter', 'Noto Sans KR', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: var(--transition-normal);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface-elevated);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
}

.navbar-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.brand i, .brand svg {
  color: var(--accent-primary);
  font-size: 1.6rem;
}

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

/* Primary Button */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-hover));
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-surface-elevated);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-outline:hover {
  background: var(--accent-light);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.btn-icon:hover {
  background: var(--bg-surface-elevated);
  color: var(--accent-primary);
}

/* Main Layout */
.main-container {
  max-width: 1300px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

/* Dashboard Banner / Stats */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-primary);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--accent-light);
  color: var(--accent-primary);
}

.stat-icon.read { background: rgba(16, 185, 129, 0.15); color: var(--status-read); }
.stat-icon.reading { background: rgba(59, 130, 246, 0.15); color: var(--status-reading); }
.stat-icon.plan { background: rgba(245, 158, 11, 0.15); color: var(--status-plan); }
.stat-icon.wishlist { background: rgba(236, 72, 153, 0.15); color: var(--status-wishlist); }

.stat-info .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.2;
}

.stat-info .stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Toolbar & Filters */
.toolbar {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 250px;
}

.search-box i, .search-box svg {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-box input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.select-custom {
  padding: 0.65rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
}

.select-custom:focus {
  border-color: var(--accent-primary);
}

.view-toggle {
  display: flex;
  background: var(--bg-primary);
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.view-btn {
  padding: 0.4rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.view-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--accent-primary);
}

/* Books Section */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
}

/* Grid View */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}

.book-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--card-shadow);
  transition: var(--transition-fast);
  position: relative;
}

.book-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-primary);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3), var(--glow-shadow);
}

.cover-wrapper {
  aspect-ratio: 2/3;
  width: 100%;
  background: var(--bg-surface-elevated);
  position: relative;
  overflow: hidden;
}

.cover-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  text-align: center;
  color: var(--text-muted);
  background: linear-gradient(135deg, var(--bg-surface-elevated), var(--bg-surface));
}

.status-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: #ffffff;
  backdrop-filter: blur(6px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.badge-read { background: var(--status-read); }
.badge-reading { background: var(--status-reading); }
.badge-plan { background: var(--status-plan); }
.badge-wishlist { background: var(--status-wishlist); }

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

.book-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.3;
}

.book-author {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.book-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

.star-rating {
  color: #f59e0b;
  font-size: 0.85rem;
}

/* List View */
.books-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.book-item-row {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  transition: var(--transition-fast);
}

.book-item-row:hover {
  transform: translateX(4px);
  border-color: var(--accent-primary);
}

.row-cover {
  width: 50px;
  height: 70px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.row-details {
  flex: 1;
}

.row-title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.row-sub {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
}

.empty-icon {
  font-size: 3.5rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* Modal UI */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 850px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transform: scale(0.95);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-container {
  transform: scale(1);
}

.modal-header {
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 1.75rem;
  overflow-y: auto;
  flex: 1;
}

/* Stepper Wizard for Add Book */
.wizard-steps {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
  position: relative;
}

.wizard-steps::before {
  content: '';
  position: absolute;
  top: 18px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--border-color);
  z-index: 1;
}

.step-item {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.step-number {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.step-item.active .step-number {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 0 12px var(--accent-primary);
}

.step-item.completed .step-number {
  background: var(--status-read);
  border-color: var(--status-read);
  color: #ffffff;
}

.step-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.step-item.active .step-label {
  color: var(--text-primary);
  font-weight: 700;
}

/* Upload & OCR Step */
.camera-dropzone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  text-align: center;
  background: var(--bg-primary);
  cursor: pointer;
  transition: var(--transition-fast);
  margin-bottom: 1.5rem;
}

.camera-dropzone:hover, .camera-dropzone.dragover {
  border-color: var(--accent-primary);
  background: var(--accent-light);
}

.camera-dropzone i, .camera-dropzone svg {
  font-size: 3rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.preview-container {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.ocr-image-box {
  flex: 1;
  min-width: 280px;
  max-height: 350px;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ocr-image-box img, .ocr-image-box video {
  max-width: 100%;
  max-height: 350px;
  object-fit: contain;
}

/* Drag & Drop OCR Chips Panel */
.ocr-chips-panel {
  flex: 1;
  min-width: 280px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chips-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-primary);
}

.chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

/* Draggable Chip */
.text-chip {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  cursor: grab;
  user-select: none;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.text-chip:hover {
  background: var(--accent-primary);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.text-chip:active {
  cursor: grabbing;
}

/* Target Inputs Dropzones */
.target-drop-field {
  position: relative;
}

.target-drop-field.drag-over input {
  border-color: var(--accent-primary) !important;
  box-shadow: 0 0 15px var(--accent-primary) !important;
  background: var(--accent-light) !important;
}

/* Form Styles */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Book Search Results Cards */
.search-results-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
  max-height: 380px;
  overflow-y: auto;
}

.search-result-card {
  display: flex;
  gap: 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.search-result-card:hover {
  border-color: var(--accent-primary);
  background: var(--accent-light);
}

.search-result-card img {
  width: 60px;
  height: 85px;
  object-fit: cover;
  border-radius: 4px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-left: 4px solid var(--accent-primary);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideIn 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Loading Overlay */
.loading-spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: #ffffff;
  animation: spin 0.8s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Lucide Icons */
svg.lucide {
  width: 1em;
  height: 1em;
  stroke-width: 2;
  vertical-align: -0.125em;
}

svg.icon-lg { width: 2em; height: 2em; }
svg.icon-spin { animation: spin 0.8s linear infinite; }
svg.icon-star-on { fill: currentColor; }

/* 0.5점 단위 반쪽 별: 배경(빈 별) 위에 채워진 별을 왼쪽 절반만 잘라 겹쳐서 표시 */
.star-half-wrap {
  position: relative;
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
}
.star-half-wrap svg.lucide {
  position: absolute;
  top: 0;
  left: 0;
}
.star-half-wrap .icon-star-half-fill {
  clip-path: inset(0 50% 0 0);
}

@media (max-width: 768px) {
  .navbar-container { padding: 0.5rem 0; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .form-row { grid-template-columns: 1fr; }
  .preview-container { flex-direction: column; }
}