/* ==========================================
   VARIABLES
   ========================================== */
:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #1e1e36;
  --bg-card-hover: #262646;
  --border-color: #2a2a4a;
  --border-hover: #4a4a7a;
  --text-primary: #e8e8f0;
  --text-secondary: #9898b8;
  --text-muted: #686888;
  --accent: #6c5ce7;
  --accent-hover: #7c6cf7;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --gold: #ffd32a;
  --gold-glow: rgba(255, 211, 42, 0.3);
  --success: #2ed573;
  --danger: #ff4757;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.2s ease;
}

/* ==========================================
   BASE
   ========================================== */
body.index-body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }

/* ==========================================
   TOP BAR
   ========================================== */
.top-bar {
  background: var(--bg-secondary);
  padding: 10px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-bar h1 {
  margin: 0;
  font-family: 'Comic Neue', cursive;
  color: var(--gold);
  font-size: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-bar h1 i {
  font-size: 22px;
}

.btn-top-shortcut {
  background: linear-gradient(135deg, var(--accent), #4834d4);
  color: white;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-top-shortcut:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--accent-glow);
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  transition: var(--transition);
  width: 160px;
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.search-box i {
  color: var(--text-muted);
  font-size: 12px;
  margin-right: 6px;
}

.search-box input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 12px;
  width: 100%;
}

.search-box input::placeholder { color: var(--text-muted); }

/* ==========================================
   CONTAINER
   ========================================== */
.container {
  padding: 16px 24px 32px;
  max-width: 1200px;
  margin: 0 auto;
}

/* ==========================================
   UPLOAD ZONE
   ========================================== */
.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  background: var(--bg-secondary);
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 20px;
}

.upload-zone:hover {
  border-color: var(--gold);
  background: #222242;
}

.upload-zone i { font-size: 22px; color: var(--gold); }
.upload-zone p { margin: 4px 0 0; color: var(--text-secondary); font-size: 13px; }
.upload-zone strong { color: var(--gold); }

.upload-zone.drag-over-zone {
  border-color: var(--accent);
  background: rgba(108, 92, 231, 0.12);
}

/* ==========================================
   DIR CONTROLS (compact)
   ========================================== */
.dir-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-secondary);
  padding: 8px 14px;
  border-radius: var(--radius);
  margin-bottom: 14px;
  margin-top: 24px;
  border: 1px solid var(--border-color);
  gap: 8px;
}

.breadcrumbs {
  font-size: 13px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 3px;
  min-width: 0;
  overflow: hidden;
}

.breadcrumbs a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  padding: 1px 6px;
  border-radius: 3px;
  transition: var(--transition);
  white-space: nowrap;
}

.breadcrumbs a:hover { color: var(--gold); background: rgba(255, 211, 42, 0.1); }
.breadcrumbs span { color: var(--text-muted); font-size: 11px; }

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

.btn-tool {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  font-size: 12px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.btn-tool:hover { background: var(--bg-card-hover); border-color: var(--border-hover); }

.btn-new-folder {
  background: linear-gradient(135deg, var(--success), #1dd1a1);
  color: #000;
  font-weight: 600;
  border: none;
}

.select-sort {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 12px;
  cursor: pointer;
}

/* ==========================================
   ACCORDION GRID (compacto)
   ========================================== */
.explorer-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.file-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.file-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.file-card.drag-over {
  border-color: var(--accent);
  box-shadow: 0 0 15px var(--accent-glow);
  background: #262650;
}

.file-card.dragging { opacity: 0.4; }

/* Image icon */
.image-icon-sm {
  color: var(--text-secondary);
  font-size: 16px;
  flex-shrink: 0;
}

/* Header row: expand button + body + context */
.folder-card-header {
  display: flex;
  align-items: center;
  min-height: 40px;
  gap: 2px;
}

/* Expand button */
.folder-expand-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: var(--transition);
  flex-shrink: 0;
  font-size: 11px;
  margin-left: 2px;
}

.folder-expand-btn:hover {
  color: var(--gold);
  background: rgba(255, 211, 42, 0.1);
}

.folder-expand-btn.expanded i {
  transform: rotate(90deg);
}

.folder-expand-btn i {
  transition: transform 0.2s ease;
}

/* Card body (clickable to enter) */
.folder-card-body {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 6px;
  cursor: pointer;
  min-width: 0;
  overflow: hidden;
  height: 40px;
}

.folder-card-body:hover {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 4px;
}

.folder-icon-sm {
  color: var(--gold);
  font-size: 16px;
  flex-shrink: 0;
}

.project-icon-sm {
  color: var(--accent);
  font-size: 16px;
  flex-shrink: 0;
}

.file-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

.file-date {
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-left: auto;
  padding-left: 8px;
}

/* Context button */
.context-menu-btn {
  background: none;
  color: var(--text-muted);
  border: none;
  width: 26px;
  height: 26px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: var(--transition);
  flex-shrink: 0;
  font-size: 14px;
  opacity: 0;
  margin-right: 2px;
}

.file-card:hover .context-menu-btn { opacity: 1; }
.context-menu-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }

.context-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 2px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0,0,0,0.6);
  z-index: 20;
  min-width: 150px;
  text-align: left;
  overflow: hidden;
  animation: dropdownIn 0.12s ease;
}

@keyframes dropdownIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.context-dropdown a,
.context-dropdown button {
  display: block;
  width: 100%;
  padding: 8px 12px;
  color: var(--text-primary);
  text-decoration: none;
  background: none;
  border: none;
  text-align: left;
  font-size: 12px;
  cursor: pointer;
  box-sizing: border-box;
  transition: var(--transition);
}

.context-dropdown a:hover,
.context-dropdown button:hover { background: var(--bg-card-hover); }
.context-dropdown i { width: 18px; text-align: center; margin-right: 4px; }
.text-danger { color: var(--danger) !important; }
.text-success { color: var(--success) !important; font-weight: 600; }

/* ==========================================
   ACCORDION CHILDREN (nested folders)
   ========================================== */
.accordion-children {
  display: none;
  border-top: 1px solid var(--border-color);
  margin-top: 0;
  padding: 4px 0 4px 24px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.accordion-children.open {
  display: block;
  animation: accordionSlide 0.2s ease;
}

@keyframes accordionSlide {
  from { opacity: 0; max-height: 0; }
  to { opacity: 1; max-height: 500px; }
}

.accordion-children .file-card {
  border: none;
  border-radius: 0;
  background: transparent;
}

.accordion-children .file-card:hover {
  background: rgba(255,255,255,0.03);
}

.accordion-children .folder-card-header {
  min-height: 34px;
}

.accordion-children .folder-card-body {
  height: 34px;
}

.accordion-children .folder-expand-btn {
  width: 24px;
  height: 24px;
  font-size: 10px;
}

.accordion-children .folder-icon-sm { font-size: 14px; }
.accordion-children .project-icon-sm { font-size: 14px; }
.accordion-children .file-name { font-size: 12px; }
.accordion-children .file-date { font-size: 10px; }

/* Loading spinner in accordion */
.accordion-loading {
  padding: 8px 12px;
  color: var(--text-muted);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.accordion-loading i {
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ==========================================
   MODALS
   ========================================== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--bg-secondary);
  padding: 24px;
  border-radius: var(--radius);
  width: 360px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

.modal h3 {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 16px;
}

.modal input,
.modal select {
  width: 100%;
  padding: 8px 10px;
  margin-bottom: 14px;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-sizing: border-box;
  font-size: 13px;
  outline: none;
}

.modal input:focus,
.modal select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.modal-actions {
  display: flex;
  gap: 8px;
}

.modal-actions button {
  flex: 1;
  padding: 8px 14px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  transition: var(--transition);
}

.btn-cancel {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color) !important;
}

.btn-confirm {
  background: linear-gradient(135deg, var(--accent), #4834d4);
  color: white;
}

.btn-confirm:hover {
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* Tree in modal */
.tree-container {
  text-align: left;
  margin-bottom: 14px;
  max-height: 260px;
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px 0;
}

.tree-item {
  display: block;
  width: 100%;
  padding: 6px 10px;
  background: none;
  border: none;
  color: var(--text-secondary);
  text-align: left;
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-item:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.tree-item.selected { background: var(--accent); color: white; }
.tree-item i { margin-right: 4px; width: 14px; text-align: center; }

/* ==========================================
   TOAST
   ========================================== */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(0,0,0,0.6);
  z-index: 2000;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  animation: toastIn 0.25s ease;
  max-width: 320px;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast i { font-size: 16px; }
.toast.success i { color: var(--success); }
.toast.error i { color: var(--danger); }

/* ==========================================
   ERROR BANNER
   ========================================== */
.error-banner {
  background: rgba(255, 71, 87, 0.15);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================
   EMPTY STATE
   ========================================== */
.empty-state {
  text-align: center;
  padding: 24px 16px;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 32px;
  margin-bottom: 8px;
  opacity: 0.5;
}

.empty-state p { font-size: 14px; margin: 0; }

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 768px) {
  .top-bar { padding: 8px 12px; flex-wrap: wrap; gap: 6px; }
  .top-bar h1 { font-size: 16px; }
  .top-bar h1 i { font-size: 18px; }
  .search-box { width: 120px; }
  .container { padding: 12px; }
  .dir-controls { flex-direction: column; align-items: stretch; }
  .toolbar { flex-wrap: wrap; }
  .modal { padding: 16px; }
}

/* ==========================================
   UPLOAD PROGRESS BAR
   ========================================== */
.upload-progress {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  height: 6px;
  overflow: hidden;
  margin-top: 8px;
}

.upload-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  transition: width 0.3s ease;
  border-radius: var(--radius-sm);
}