/* Theme Variables */
:root {
  --transition-theme: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}
[data-theme="dark"] {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-hover: #30363d;
  --color-border: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent-blue: #58a6ff;
  --accent-green: #3fb950;
  --accent-yellow: #d29922;
  --accent-purple: #a371f7;
  --accent-orange: #f78166;
  --shadow-color: rgba(0, 0, 0, 0.4);
  --tree-line-color: #30363d;
  --table-odd-row: rgba(255, 255, 255, 0.02);
}
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f6f8fa;
  --bg-tertiary: #eaeef2;
  --bg-hover: #d0d7de;
  --color-border: #d0d7de;
  --text-primary: #1f2328;
  --text-secondary: #656d76;
  --accent-blue: #0969da;
  --accent-green: #1a7f37;
  --accent-yellow: #9a6700;
  --accent-purple: #8250df;
  --accent-orange: #cf222e;
  --shadow-color: rgba(31, 35, 40, 0.15);
  --tree-line-color: #d0d7de;
  --table-odd-row: rgba(0, 0, 0, 0.02);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Kanit', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: var(--transition-theme);
}
/* Material Icons */
.material-icons-round {
  font-size: 20px;
  vertical-align: middle;
}
/* Header */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition-theme);
}
.header-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-blue) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px var(--shadow-color);
}
.header-icon .material-icons-round {
  font-size: 24px;
}
.header-info {
  flex: 1;
}
.header-title {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.header-subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.125rem;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
/* Theme Toggle Button */
.theme-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  background: var(--bg-tertiary);
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}
.theme-toggle:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: scale(1.05);
}
.theme-toggle .icon-night,
.theme-toggle .icon-day {
  display: none;
}
/* Theme-state based (component mode) */
.theme-toggle[data-theme-state="dark"] .icon-day {
  display: flex;
}
.theme-toggle[data-theme-state="light"] .icon-night {
  display: flex;
}
/* Root-based fallback */
[data-theme="dark"] .theme-toggle:not([data-theme-state]) .icon-day {
  display: flex;
}
[data-theme="light"] .theme-toggle:not([data-theme-state]) .icon-night {
  display: flex;
}
/* Main Container */
.main-container {
  display: flex;
  flex: 1;
  overflow: hidden;
}
/* Sidebar - Tree View */
.sidebar {
  width: 340px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: var(--transition-theme);
}
.sidebar-header {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.sidebar-header .material-icons-round {
  font-size: 18px;
  color: var(--accent-yellow);
}
.upload-btn {
  margin-left: auto;
  padding: 0.5rem 0.875rem;
  background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-blue) 100%);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  transition: all 0.2s ease;
  text-transform: none;
  letter-spacing: 0;
  font-family: inherit;
}
.upload-btn .material-icons-round {
  font-size: 16px;
}
.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--shadow-color);
}
.upload-btn:active {
  transform: translateY(0);
}
.file-input-hidden {
  display: none;
}
.uploaded-file {
  background: linear-gradient(135deg, rgba(163, 113, 247, 0.08) 0%, rgba(88, 166, 255, 0.08) 100%);
  border: 1px dashed var(--accent-purple);
  border-radius: 10px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}
.uploaded-file .tree-node-content {
  background: transparent;
}
.uploaded-file .tree-icon {
  color: var(--accent-purple) !important;
}
.tree-container {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
}
.tree-container::-webkit-scrollbar {
  width: 8px;
}
.tree-container::-webkit-scrollbar-track {
  background: transparent;
}
.tree-container::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}
/* Tree Node Styles */
.tree-node {
  user-select: none;
}
.tree-node-content {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
}
.tree-node-content:hover {
  background: var(--bg-tertiary);
}
.tree-node-content.active {
  background: rgba(88, 166, 255, 0.12);
  color: var(--accent-blue);
}
.tree-node-content.loading {
  opacity: 0.6;
}
.tree-toggle {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.tree-toggle .material-icons-round {
  font-size: 18px;
  transition: transform 0.2s ease;
}
.tree-toggle.expanded .material-icons-round {
  transform: rotate(90deg);
}
.tree-toggle.hidden {
  visibility: hidden;
}
.tree-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.tree-icon .material-icons-round {
  font-size: 20px;
}
.tree-icon.folder {
  color: var(--accent-yellow);
}
.tree-icon.file {
  color: var(--accent-green);
}
.tree-icon.sheet {
  color: var(--accent-blue);
}
.tree-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.8125rem;
  font-weight: 500;
}
.tree-badge {
  font-size: 0.625rem;
  padding: 0.2rem 0.5rem;
  background: var(--bg-tertiary);
  border-radius: 6px;
  color: var(--text-secondary);
  font-weight: 500;
  font-family: 'JetBrains Mono', monospace;
}
.tree-children {
  padding-left: 1.25rem;
  border-left: 1px dashed var(--tree-line-color);
  margin-left: 1rem;
  display: none;
}
.tree-children.expanded {
  display: block;
}
/* Content Area */
.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-primary);
  transition: var(--transition-theme);
}
.content-header {
  padding: 0.875rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  gap: 1rem;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  flex-wrap: wrap;
}
.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--text-secondary);
}
.breadcrumb-item .material-icons-round {
  font-size: 16px;
}
.breadcrumb-separator {
  color: var(--color-border);
}
.breadcrumb-separator .material-icons-round {
  font-size: 16px;
}
.breadcrumb-item.active {
  color: var(--accent-blue);
  font-weight: 600;
}
.content-stats {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.stat-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-tertiary);
  padding: 0.375rem 0.75rem;
  border-radius: 6px;
}
.stat-value {
  color: var(--text-primary);
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}
/* Export Buttons */
.export-buttons {
  display: flex;
  gap: 0.5rem;
}
.export-btn {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  background: var(--bg-tertiary);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  transition: all 0.2s ease;
  font-family: inherit;
}
.export-btn .material-icons-round {
  font-size: 16px;
}
.export-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--accent-blue);
}
.export-btn.csv:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}
.export-btn.json:hover {
  border-color: var(--accent-purple);
  color: var(--accent-purple);
}
.content-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
/* Table Container */
.table-container {
  flex: 1;
  overflow: auto;
  padding: 1rem;
}
.table-container::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
.table-container::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
.table-container::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 5px;
}
.table-container::-webkit-scrollbar-corner {
  background: var(--bg-secondary);
}
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.8125rem;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px var(--shadow-color);
}
.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.data-table th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-secondary);
  position: sticky;
  top: 0;
  z-index: 10;
  text-transform: uppercase;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  font-family: 'JetBrains Mono', monospace;
}
.data-table tbody tr {
  transition: background 0.1s ease;
}
.data-table tbody tr:hover {
  background: rgba(88, 166, 255, 0.06);
}
.data-table tbody tr:nth-child(odd) {
  background: var(--table-odd-row);
}
.data-table tbody tr:nth-child(odd):hover {
  background: rgba(88, 166, 255, 0.06);
}
.row-number {
  color: var(--text-secondary);
  font-size: 0.75rem;
  text-align: center !important;
  width: 50px;
  background: var(--bg-tertiary) !important;
  font-weight: 500;
  font-family: 'JetBrains Mono', monospace;
}
/* Empty State */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  gap: 1rem;
  padding: 3rem;
}
.empty-state-icon {
  width: 80px;
  height: 80px;
  background: var(--bg-tertiary);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.6;
}
.empty-state-icon .material-icons-round {
  font-size: 40px;
}
.empty-state-text {
  font-size: 1rem;
  text-align: center;
  font-weight: 500;
}
.empty-state-hint {
  font-size: 0.8125rem;
  opacity: 0.7;
}
/* Loading Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(13, 17, 23, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
[data-theme="light"] .loading-overlay {
  background: rgba(255, 255, 255, 0.8);
}
/* Responsive */
@media (max-width: 768px) {
  .main-container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: 40vh;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  .content-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .header-title {
    font-size: 1rem;
  }
  .header-subtitle {
    display: none;
  }
}
/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.fade-in {
  animation: fadeIn 0.3s ease;
}