/* =================================
   Document Library
   ================================= */

/* Header Navigation */
.header-nav {
  display: flex;
  gap: 4px;
  margin-left: 24px;
}

.header-nav .nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius);
  transition: var(--transition);
}

.header-nav .nav-link:hover {
  color: var(--text-primary);
  background: var(--background);
}

.header-nav .nav-link.active {
  color: var(--primary-color);
  background: #eef2ff;
  font-weight: 600;
}

/* Layout Wrapper */
.doc-layout {
  display: flex;
  gap: 0;
  min-height: calc(100vh - 90px);
  position: relative;
}

.doc-main {
  flex: 1;
  min-width: 0;
  padding: 24px 28px;
}

/* Breadcrumbs */
.doc-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 20px;
  padding: 10px 16px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px var(--shadow);
  flex-wrap: wrap;
  font-size: 14px;
}

.breadcrumb-item {
  appearance: none;
  background: none;
  border: none;
  color: var(--primary-color);
  cursor: pointer;
  display: inline-flex;
  font-weight: 500;
  font-family: inherit;
  font-size: inherit;
  padding: 2px 4px;
  border-radius: 4px;
  transition: var(--transition);
  white-space: nowrap;
}

.breadcrumb-item:hover {
  background: #eef2ff;
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--text-secondary);
  font-size: 12px;
  user-select: none;
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
}

/* Toolbar */
.doc-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.doc-toolbar .search-box {
  flex: 1;
  min-width: 200px;
  max-width: 400px;
}

.doc-toolbar .search-box input {
  width: 100%;
}

.doc-toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.doc-toolbar select {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 13px;
  background: var(--surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

.doc-toolbar select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.view-toggle {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

.view-toggle button {
  background: var(--surface);
  border: none;
  padding: 7px 12px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  display: flex;
  align-items: center;
}

.view-toggle button + button {
  border-left: 1px solid var(--border-color);
}

.view-toggle button.active {
  background: var(--primary-color);
  color: white;
}

.view-toggle button:hover:not(.active) {
  background: var(--background);
  color: var(--text-primary);
}

.doc-info-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-left: auto;
}

.doc-info-bar .bucket-name {
  font-family: 'Courier New', Consolas, monospace;
  background: var(--background);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 12px;
}

/* Grid View */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.doc-item-card {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 10px;
  position: relative;
}

.doc-item-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px var(--shadow);
  transform: translateY(-2px);
}

.doc-item-card.selected {
  border-color: var(--primary-color);
  background: #f5f3ff;
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.doc-item-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.doc-item-icon.folder { background: #fef3c7; color: #d97706; }
.doc-item-icon.json   { background: #dbeafe; color: #2563eb; }
.doc-item-icon.html   { background: #fce7f3; color: #db2777; }
.doc-item-icon.csv    { background: #d1fae5; color: #059669; }
.doc-item-icon.text   { background: #e5e7eb; color: #4b5563; }
.doc-item-icon.image  { background: #ede9fe; color: #7c3aed; }
.doc-item-icon.pdf    { background: #fee2e2; color: #dc2626; }
.doc-item-icon.zip    { background: #fef3c7; color: #92400e; }
.doc-item-icon.generic{ background: #f3f4f6; color: #6b7280; }

.doc-item-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-word;
  line-height: 1.3;
  max-width: 100%;
  overflow: hidden;
  display: -webkit-box;
  line-clamp: 2;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.doc-item-meta {
  font-size: 11px;
  color: var(--text-secondary);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

/* List View */
.doc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.doc-list-header {
  display: grid;
  grid-template-columns: 40px 1fr 100px 160px;
  gap: 12px;
  padding: 10px 16px;
  background: var(--background);
  border-bottom: 1px solid var(--border-color);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  align-items: center;
}

.doc-list-header span {
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 4px;
}

.doc-list-header span:hover {
  color: var(--primary-color);
}

.sort-arrow {
  font-size: 10px;
  opacity: 0.4;
}

.sort-arrow.active {
  opacity: 1;
  color: var(--primary-color);
}

.doc-list-row {
  display: grid;
  grid-template-columns: 40px 1fr 100px 160px;
  gap: 12px;
  padding: 10px 16px;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 1px solid var(--border-color);
}

.doc-list-row:last-child {
  border-bottom: none;
}

.doc-list-row:hover {
  background: #f5f3ff;
}

.doc-list-row.selected {
  background: #eef2ff;
}

.doc-item-card:focus-visible,
.doc-list-row:focus-visible,
.breadcrumb-item:focus-visible {
  outline: 2px solid rgba(79, 70, 229, 0.5);
  outline-offset: 2px;
}

.doc-list-row .doc-item-icon {
  width: 32px;
  height: 32px;
  font-size: 16px;
}

.doc-list-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-list-size,
.doc-list-date {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* =================================
   Full-screen Document Viewer
   ================================= */

.viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.viewer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.viewer-chrome {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  background: var(--surface);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
  border-left: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  transform: translateY(12px) scale(0.98);
  transition: transform 0.25s ease;
}

.viewer-overlay.open .viewer-chrome {
  transform: translateY(0) scale(1);
}

/* Top bar */
.viewer-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 56px;
  min-height: 56px;
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
  flex-shrink: 0;
  gap: 12px;
}

.viewer-topbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
}

.viewer-topbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.viewer-nav-btn {
  appearance: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  flex-shrink: 0;
}

.viewer-nav-btn:hover:not(:disabled) {
  background: var(--background);
  color: var(--text-primary);
  border-color: var(--primary-color);
}

.viewer-nav-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

.viewer-file-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
  white-space: nowrap;
}

.viewer-file-badge.badge-json   { background: #dbeafe; color: #1d4ed8; }
.viewer-file-badge.badge-html   { background: #fce7f3; color: #be185d; }
.viewer-file-badge.badge-csv    { background: #d1fae5; color: #047857; }
.viewer-file-badge.badge-text   { background: #e5e7eb; color: #374151; }
.viewer-file-badge.badge-image  { background: #ede9fe; color: #6d28d9; }
.viewer-file-badge.badge-pdf    { background: #fee2e2; color: #b91c1c; }
.viewer-file-badge.badge-generic{ background: #f3f4f6; color: #6b7280; }

.viewer-filename {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
  line-height: 1.3;
}

.viewer-action-btn {
  appearance: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 6px 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.viewer-action-btn:hover {
  background: var(--background);
  color: var(--text-primary);
  border-color: var(--primary-color);
}

.viewer-action-btn.active {
  background: #eef2ff;
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.viewer-close-btn {
  appearance: none;
  background: none;
  border: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

.viewer-close-btn:hover {
  background: #fee2e2;
  color: #dc2626;
}

/* Info drawer */
.viewer-info-drawer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  border-bottom: 1px solid transparent;
  background: var(--background);
  padding: 0 24px;
}

.viewer-info-drawer.open {
  max-height: 120px;
  padding: 14px 24px;
  border-bottom-color: var(--border-color);
}

.viewer-info-grid {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.viewer-info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.viewer-info-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-secondary);
  font-weight: 600;
}

.viewer-info-value {
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 500;
}

/* Document content area */
.viewer-body {
  flex: 1;
  overflow: auto;
  position: relative;
  background: #f8fafc;
}

.viewer-loading {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 80px 20px;
  color: var(--text-secondary);
  font-size: 15px;
}

.viewer-loading.active {
  display: flex;
}

.viewer-loading .spinner {
  width: 28px;
  height: 28px;
  border-width: 3px;
  margin: 0;
}

.viewer-content {
  min-height: 100%;
}

/* Text / code content */
.viewer-content pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 28px 32px;
  font-family: 'Courier New', Consolas, 'Liberation Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  margin: 0;
  min-height: 100%;
  border-radius: 0;
}

.viewer-content .json-key    { color: #7dd3fc; }
.viewer-content .json-string { color: #86efac; }
.viewer-content .json-number { color: #fbbf24; }
.viewer-content .json-bool   { color: #c084fc; }
.viewer-content .json-null   { color: #64748b; font-style: italic; }

/* Images */
.viewer-content .viewer-image-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  min-height: 100%;
  background:
    linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
    linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
    linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

.viewer-content .viewer-image-wrap img {
  max-width: 100%;
  max-height: calc(100vh - 160px);
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

/* Iframes (HTML, PDF) */
.viewer-content iframe {
  width: 100%;
  height: 100%;
  min-height: calc(100vh - 120px);
  border: none;
  display: block;
}

/* Error inside viewer */
.viewer-content .viewer-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 32px;
  text-align: center;
  color: var(--text-secondary);
  gap: 12px;
}

.viewer-content .viewer-error h3 {
  font-size: 18px;
  color: var(--text-primary);
}

.viewer-content .viewer-error p {
  font-size: 14px;
  max-width: 400px;
}

/* Load More */
.doc-load-more {
  text-align: center;
  padding: 20px;
}

.doc-load-more .btn {
  min-width: 200px;
}

/* Empty / Error States */
.doc-empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.doc-empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.doc-empty-state h3 {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.doc-empty-state p {
  font-size: 14px;
  max-width: 400px;
  margin: 0 auto;
}

.doc-error-state {
  text-align: center;
  padding: 40px 20px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-lg);
}

.doc-error-state h3 {
  color: #991b1b;
  margin-bottom: 8px;
}

.doc-error-state p {
  color: #b91c1c;
  font-size: 14px;
  margin-bottom: 16px;
}

/* Loading skeleton */
.doc-skeleton {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.doc-skeleton-card {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.skeleton-pulse {
  background: linear-gradient(90deg, var(--border-color) 25%, #f3f4f6 50%, var(--border-color) 75%);
  background-size: 200% 100%;
  animation: skeletonPulse 1.5s infinite;
  border-radius: var(--radius);
}

.skeleton-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
}

.skeleton-text {
  width: 80%;
  height: 14px;
}

.skeleton-text-sm {
  width: 50%;
  height: 11px;
}

@keyframes skeletonPulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* =================================
   Responsive
   ================================= */

@media (max-width: 1024px) {
  .viewer-chrome {
    max-width: 100%;
  }

  .viewer-action-btn span {
    display: none;
  }
}

@media (max-width: 768px) {
  .doc-main {
    padding: 16px;
  }

  .header-nav {
    margin-left: 12px;
  }

  .doc-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .doc-toolbar .search-box {
    max-width: none;
  }

  .doc-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  .doc-list-header,
  .doc-list-row {
    grid-template-columns: 32px 1fr 80px;
  }

  .doc-list-header span:last-child,
  .doc-list-date {
    display: none;
  }

  .viewer-topbar {
    padding: 0 12px;
    height: 48px;
    min-height: 48px;
  }

  .viewer-filename {
    font-size: 13px;
  }

  .viewer-nav-btn {
    width: 30px;
    height: 30px;
  }

  .viewer-content pre {
    padding: 16px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .doc-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .doc-item-card {
    padding: 14px 10px;
  }

  .viewer-nav-btn {
    display: none;
  }
}