/* ══════════════════════════════════════════════
   🎨 Company Drive — Design System
   ══════════════════════════════════════════════ */

:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #eef2ff;
  --primary-subtle: rgba(99,102,241,.08);
  --danger: #e11d48;
  --danger-hover: #be123c;
  --success: #10b981;
  --warning: #f59e0b;
  --bg: #f8f7ff;
  --bg-card: #ffffff;
  --bg-sidebar: #1a1a30;
  --bg-sidebar-hover: rgba(255,255,255,.08);
  --text: #0f172a;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --text-sidebar: rgba(255,255,255,.75);
  --text-sidebar-heading: #ffffff;
  --border: #e2e8f0;
  --border-hover: #cbd5e1;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,.05), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.08), 0 4px 10px rgba(0,0,0,.04);
  --shadow-xl: 0 20px 60px rgba(0,0,0,.12);
  --transition: all .2s cubic-bezier(.4,0,.2,1);
  --font: -apple-system, BlinkMacSystemFont, 'SF Pro', 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ══════════════════════════════════════════════
   Auth Pages — Premium gradient + glass card
   ══════════════════════════════════════════════ */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #1a1a30 0%, #2e1e5e 40%, #3b1f8a 100%);
}

.auth-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(99,102,241,.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(139,92,246,.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(99,102,241,.08) 0%, transparent 50%);
  pointer-events: none;
}

.auth-card {
  position: relative;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 50px rgba(0,0,0,.25);
  padding: 44px 40px 36px;
  width: 100%;
  max-width: 420px;
  border: 1px solid rgba(255,255,255,.1);
}

.auth-card h1 {
  font-size: 1.4rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
  letter-spacing: -.02em;
  color: var(--text);
}

.auth-card .subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: .875rem;
  margin-bottom: 28px;
}

/* ══════════════════════════════════════════════
   Forms
   ══════════════════════════════════════════════ */
.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: .8125rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
  letter-spacing: -.01em;
}

.form-group input, .form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  transition: var(--transition);
  outline: none;
  background: #fff;
  color: var(--text);
  font-family: var(--font);
}

.form-group input::placeholder { color: var(--text-light); }

.form-group input:focus, .form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

/* ══════════════════════════════════════════════
   Buttons
   ══════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: var(--font);
  letter-spacing: -.01em;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
  padding: 12px;
  font-size: .95rem;
}

.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(99,102,241,.35); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-secondary {
  background: #fff;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover { background: #f8f7ff; border-color: var(--primary); color: var(--primary); }

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: var(--danger-hover); transform: translateY(-1px); }

.btn-sm { padding: 7px 14px; font-size: .8125rem; }

.btn-icon {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  font-size: .95rem;
  color: var(--text-secondary);
}
.btn-icon:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }

/* Sidebar footer btn-icon — visible on dark bg */
.sidebar-footer .btn-icon {
  color: rgba(255,255,255,.5);
  border: 1px solid rgba(255,255,255,.1);
}
.sidebar-footer .btn-icon:hover {
  color: #fff;
  background: rgba(99,102,241,.25);
  border-color: var(--primary);
}

.auth-link {
  text-align: center;
  margin-top: 24px;
  font-size: .8125rem;
  color: var(--text-secondary);
}

/* ══════════════════════════════════════════════
   Alerts
   ══════════════════════════════════════════════ */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: .8125rem;
  margin-bottom: 16px;
  line-height: 1.5;
}

.alert-error { background: #fff1f2; color: #e11d48; border: 1px solid #ffe4e6; }
.alert-success { background: #f0fdf4; color: #059669; border: 1px solid #dcfce7; }

/* ══════════════════════════════════════════════
   App Layout
   ══════════════════════════════════════════════ */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ══════════════════════════════════════════════
   Sidebar — Dark premium
   ══════════════════════════════════════════════ */
.sidebar {
  width: 280px;
  min-width: 280px;
  background: linear-gradient(180deg, #1a1a30 0%, #1e1e3a 100%);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(255,255,255,.04);
}

.sidebar-header {
  padding: 22px 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.sidebar-header h2 {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-sidebar-heading);
  letter-spacing: -.01em;
}

.sidebar-header .company-name {
  font-size: .75rem;
  color: rgba(255,255,255,.35);
  margin-top: 3px;
  padding-left: 32px;
}

.sidebar-nav {
  padding: 10px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
}

.sidebar-nav::-webkit-scrollbar { width: 3px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,.1); border-radius: 2px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  font-size: .875rem;
  color: var(--text-sidebar);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font);
  font-weight: 450;
}

.nav-item:hover { background: var(--bg-sidebar-hover); color: var(--text-sidebar-heading); }
.nav-item.active { background: rgba(99,102,241,.2); color: #a5b4fc; font-weight: 600; }
.nav-item .icon { font-size: 1.1rem; }

.folder-section-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px 6px;
  font-size: .6875rem;
  color: rgba(255,255,255,.3);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 600;
}

.sidebar-footer {
  padding: 14px 18px;
  border-top: 1px solid rgba(255,255,255,.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-footer .user-info {
  font-size: .75rem;
  color: rgba(255,255,255,.45);
  min-width: 0;
}
.sidebar-footer .user-info strong {
  color: var(--text-sidebar-heading);
  display: block;
  font-size: .8125rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ══════════════════════════════════════════════
   Folder Tree
   ══════════════════════════════════════════════ */
.folder-tree { margin: 0; padding: 0; list-style: none; }

/* 全部文件根按钮 */
.all-files-root {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  margin: 2px 0;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  font-size: .8125rem;
  font-weight: 600;
  color: rgba(255,255,255,.65);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font);
}
.all-files-root:hover { background: var(--bg-sidebar-hover); color: var(--text-sidebar-heading); }
.all-files-root svg { flex-shrink: 0; }

/* 文件夹行 */
.folder-row td {
  padding: 10px 14px !important;
  font-weight: 600;
  color: var(--primary);
}
.folder-row td .file-icon svg { margin-right: 8px; }

/* Upload 全屏弹窗 */
.upload-modal-overlay {
  z-index: 1001;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(8px);
}
.upload-modal {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 90vw;
  max-width: 600px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: slideUp .25s cubic-bezier(.16,1,.3,1);
}
.upload-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: .95rem;
}
.upload-modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}
.modal-dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg);
}
.modal-dropzone:hover, .modal-dropzone.drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: 0 0 0 4px var(--primary-subtle);
}
.modal-dropzone svg {
  color: var(--text-light);
  margin-bottom: 8px;
}
.modal-dropzone p {
  color: var(--text-secondary);
  font-size: .95rem;
  margin-bottom: 4px;
}
.modal-dropzone-hint {
  font-size: .8rem;
  color: var(--text-light);
}
.folder-tree ul { margin: 0; padding: 0; list-style: none; }

.folder-tree-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px 5px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  font-size: .8125rem;
  color: rgba(255,255,255,.55);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: var(--font);
}

.folder-tree-item:hover { background: var(--bg-sidebar-hover); color: var(--text-sidebar); }
.folder-tree-item.active { background: rgba(99,102,241,.15); color: #a5b4fc; }

.folder-tree-item .toggle {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .5rem;
  flex-shrink: 0;
  transition: transform .2s ease;
  color: rgba(255,255,255,.25);
}
.folder-tree-item .toggle.expanded { transform: rotate(90deg); }
.folder-tree-item .toggle.hidden { visibility: hidden; }
.folder-tree-item .f-icon { font-size: .85rem; flex-shrink: 0; }
.folder-tree-item .f-name { overflow: hidden; text-overflow: ellipsis; }

.folder-tree-children { overflow: hidden; }
.folder-tree-children.collapsed { display: none; }

/* ══════════════════════════════════════════════
   Main Content
   ══════════════════════════════════════════════ */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ══════════════════════════════════════════════
   Toolbar
   ══════════════════════════════════════════════ */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.toolbar .breadcrumb {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  font-size: .875rem;
  overflow: hidden;
}

.toolbar .breadcrumb .crumb {
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
  font-size: .85rem;
}
.toolbar .breadcrumb .crumb:hover { color: var(--text); background: var(--bg); }
.toolbar .breadcrumb .crumb.current { color: var(--text); font-weight: 600; cursor: default; }
.toolbar .breadcrumb .sep { color: var(--text-light); margin: 0 2px; }

.toolbar .search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #f1f5f9;
  border-radius: 20px;
  padding: 7px 16px;
  min-width: 200px;
  transition: var(--transition);
  border: 1.5px solid transparent;
}
.toolbar .search-box:focus-within {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}
.toolbar .search-box input {
  border: none;
  background: none;
  outline: none;
  font-size: .8125rem;
  width: 100%;
  font-family: var(--font);
}
.toolbar .search-box .icon { color: var(--text-light); font-size: .85rem; }

/* ══════════════════════════════════════════════
   File List — Card-style rows
   ══════════════════════════════════════════════ */
.file-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px 28px;
}

.file-area::-webkit-scrollbar { width: 6px; }
.file-area::-webkit-scrollbar-thumb { background: #e2e8f0; border-radius: 3px; }
.file-area::-webkit-scrollbar-track { background: transparent; }

.file-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 4px;
}

.file-table thead th {
  text-align: left;
  padding: 8px 14px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: .05em;
  cursor: pointer;
  user-select: none;
  background: transparent;
  border: none;
}
.file-table thead th:hover { color: var(--text-secondary); }
.file-table thead th .sort-icon { margin-left: 3px; font-size: .65rem; color: var(--text-light); }

.file-table tbody tr {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.file-table tbody tr:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.file-table td {
  padding: 12px 14px;
  font-size: .875rem;
  vertical-align: middle;
  border: none;
}
.file-table tbody tr td:first-child {
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  padding-left: 18px;
}
.file-table tbody tr td:last-child {
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding-right: 18px;
}

.file-row .file-icon { font-size: 1.3rem; margin-right: 10px; opacity: .8; }
.file-row .file-name {
  font-weight: 500;
  display: flex;
  align-items: center;
  color: var(--text);
}

.file-row .actions {
  display: flex;
  gap: 2px;
  opacity: 0;
  transition: var(--transition);
}
.file-row:hover .actions { opacity: 1; }

.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-light);
}
.empty-state .icon { font-size: 3rem; margin-bottom: 16px; opacity: .6; }
.empty-state h3 { color: var(--text-secondary); font-weight: 600; margin-bottom: 8px; font-size: 1.1rem; }
.empty-state p { font-size: .875rem; }

/* ══════════════════════════════════════════════
   Card View — Grid
   ══════════════════════════════════════════════ */
.file-content-card .file-table thead { display: none; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  padding: 4px 0;
}

.card-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.card-item:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(99,102,241,.12);
  transform: translateY(-2px);
}

.card-thumb {
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f8f7ff;
  color: var(--text-light);
  font-size: 2.2rem;
  border-bottom: 1px solid var(--border);
}
.card-thumb svg { width: 40px; height: 40px; opacity: .6; }

.card-thumb-img {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.card-folder .card-thumb {
  background: #eef2ff;
  color: var(--primary);
}
.card-folder .card-thumb svg { opacity: .8; }

.card-name {
  padding: 10px 12px 4px;
  font-size: .8125rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
}

.card-meta {
  padding: 0 12px 10px;
  font-size: .7rem;
  color: var(--text-light);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ══════════════════════════════════════════════
   Pagination
   ══════════════════════════════════════════════ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 24px 0 8px;
}

.pagination .page-btn {
  min-width: 34px;
  height: 34px;
  padding: 0 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text);
  font-size: .8125rem;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-weight: 500;
}
.pagination .page-btn:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
.pagination .page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .page-btn:disabled { opacity: .3; cursor: not-allowed; }
.pagination .page-info { font-size: .8125rem; color: var(--text-secondary); padding: 0 8px; }

/* ══════════════════════════════════════════════
   Dropzone
   ══════════════════════════════════════════════ */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 20px;
  background: var(--bg-card);
}
.dropzone:hover, .dropzone.drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: 0 0 0 4px var(--primary-subtle);
}
.dropzone .icon { font-size: 2.2rem; margin-bottom: 8px; opacity: .7; }
.dropzone p { color: var(--text-secondary); font-size: .9rem; }
.dropzone .hint { font-size: .8rem; color: var(--text-light); margin-top: 4px; }

/* ══════════════════════════════════════════════
   Selection Toolbar
   ══════════════════════════════════════════════ */
.selection-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg-card);
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
  box-shadow: 0 2px 8px rgba(99,102,241,.1);
  animation: slideUp .2s ease;
}

.selection-toolbar .btn { font-size: .8125rem; padding: 6px 12px; cursor: pointer; font-family: var(--font); font-weight: 500; display: inline-flex; align-items: center; }
.selection-toolbar .btn-danger { border: 1.5px solid transparent; color: #fff; }
.selection-toolbar .btn-danger:hover { background: var(--danger-hover); }

/* ══════════════════════════════════════════════
   Multi-select toggle
   ══════════════════════════════════════════════ */
/* 默认隐藏所有复选框 */
.file-check,
#selectAllCheck { display: none; }

/* 多选模式开启后显示 */
.multi-select-active .file-check,
.multi-select-active #selectAllCheck { display: inline-block; }
.multi-select-active .card-check { opacity: 1; }
.multi-select-active .card-item:hover .card-check,
.multi-select-active .card-item.selected .card-check { opacity: 1; }

/* 多选按钮激活状态 */
#multiSelectBtn.active {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* 卡片选择复选框 */
.card-check {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 2;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.85);
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s ease;
  box-shadow: 0 1px 3px rgba(0,0,0,.1);
}
.multi-select-active .card-item:hover .card-check,
.multi-select-active .card-item.selected .card-check,
.card-item.selected .card-check { opacity: 1; }
.card-checkbox { width: 14px; height: 14px; cursor: pointer; accent-color: var(--primary); }
.card-item { position: relative; }
.card-item.selected { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-subtle); }

/* 文件行选中背景高亮 */
.file-table tbody tr.selected {
  background: var(--primary-subtle) !important;
  box-shadow: var(--shadow-sm);
}
.file-table tbody tr.selected td:first-child {
  border-left: 3px solid var(--primary);
  padding-left: 15px;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

/* ══════════════════════════════════════════════
   Upload Progress
   ══════════════════════════════════════════════ */
.upload-progress {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.upload-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.upload-item .name {
  flex: 1;
  font-size: .875rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}

.upload-item .bar {
  width: 120px;
  height: 5px;
  background: #f1f5f9;
  border-radius: 4px;
  overflow: hidden;
}

.upload-item .bar .fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  transition: width .3s ease;
}

.upload-item .status {
  font-size: .8rem;
  color: var(--text-secondary);
  min-width: 36px;
  text-align: right;
  font-weight: 500;
}

/* ══════════════════════════════════════════════
   Admin Page
   ══════════════════════════════════════════════ */
.admin-page {
  padding: 32px;
  max-width: 840px;
  margin: 0 auto;
}

.admin-page h1 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -.01em;
}

.admin-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.admin-section h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -.01em;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 12px;
}

.info-item {
  padding: 16px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.info-item .label {
  font-size: .75rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .03em;
  font-weight: 600;
}

.info-item .value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

/* ══════════════════════════════════════════════
   User Table
   ══════════════════════════════════════════════ */
.user-table { width: 100%; border-collapse: collapse; }

.user-table thead th {
  text-align: left;
  padding: 10px 14px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: 2px solid var(--border);
}

.user-table tbody td {
  padding: 12px 14px;
  font-size: .875rem;
  border-bottom: 1px solid var(--border);
}

.role-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .01em;
}
.role-viewer { background: #f1f5f9; color: #475569; }
.role-editor { background: #eef2ff; color: var(--primary); }
.role-admin { background: #fef3c7; color: #d97706; }

/* ══════════════════════════════════════════════
   Context Menu
   ══════════════════════════════════════════════ */
.context-menu {
  position: fixed;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  z-index: 1000;
  min-width: 170px;
  backdrop-filter: blur(20px);
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: .8125rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  color: var(--text);
  font-family: var(--font);
  font-weight: 450;
}

.context-menu-item:hover { background: var(--primary-light); color: var(--primary); }
.context-menu-item.danger { color: var(--danger); }
.context-menu-item.danger:hover { background: #fff1f2; }

/* ══════════════════════════════════════════════
   Modal
   ══════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  animation: fadeIn .2s ease;
}

.modal {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 32px;
  width: 90%;
  max-width: 480px;
  animation: slideUp .25s cubic-bezier(.16,1,.3,1);
  border: 1px solid rgba(255,255,255,.1);
}

.modal h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 20px; letter-spacing: -.01em; }

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 24px;
}
.modal-actions .btn { min-width: 80px; }

/* ══════════════════════════════════════════════
   Toast
   ══════════════════════════════════════════════ */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  font-size: .8125rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: slideIn .25s cubic-bezier(.16,1,.3,1);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -.01em;
}
.toast-success { background: #059669; color: #fff; }
.toast-error { background: var(--danger); color: #fff; }

/* ══════════════════════════════════════════════
   Preview Modal
   ══════════════════════════════════════════════ */
.preview-modal {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 90vw;
  max-width: 1000px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: slideUp .25s cubic-bezier(.16,1,.3,1);
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

.preview-header .preview-name {
  font-weight: 600;
  font-size: .9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-close {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: var(--radius);
  transition: var(--transition);
  line-height: 1;
}
.preview-close:hover { background: #f1f5f9; color: var(--text); }

.preview-body {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  background: #f8f7ff;
  position: relative;
}

.preview-image-wrapper {
  max-width: 100%;
  max-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-in;
  transition: transform .2s ease;
}
.preview-image-wrapper.zoomed { cursor: zoom-out; overflow: auto; }
.preview-image-wrapper.zoomed .preview-image { max-width: none; max-height: none; width: auto; height: auto; }

.preview-image { max-width: 100%; max-height: 70vh; object-fit: contain; border-radius: 6px; }

.preview-zoom-hint {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  font-size: .7rem;
  color: var(--text-light);
  background: rgba(255,255,255,.92);
  padding: 4px 12px;
  border-radius: 12px;
  pointer-events: none;
  backdrop-filter: blur(8px);
}

.preview-pdf { width: 100%; height: 70vh; border: none; }
.preview-video { max-width: 100%; max-height: 70vh; }
.preview-audio { width: 80%; }

.preview-text {
  width: 100%;
  height: 60vh;
  overflow: auto;
  background: #0f172a;
  color: #e2e8f0;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: .8125rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  margin: 0;
  border-radius: 0;
}

.preview-unsupported {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.preview-unsupported .icon { font-size: 2.8rem; margin-bottom: 12px; opacity: .5; }
.preview-unsupported .hint { font-size: .8125rem; color: var(--text-light); margin-top: 8px; }

.preview-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 12px 24px;
  border-top: 1px solid var(--border);
  gap: 8px;
}

/* ══════════════════════════════════════════════
   Selection Rectangle — Drag to select
   ══════════════════════════════════════════════ */
#selectionRect {
  position: fixed;
  pointer-events: none;
  z-index: 998;
  border: 1.5px dashed var(--primary);
  background: rgba(99,102,241,.08);
  display: none;
  border-radius: 4px;
}

/* ══════════════════════════════════════════════
   Animations
   ══════════════════════════════════════════════ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes slideIn {
  from { opacity: 0; transform: translateX(24px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ══════════════════════════════════════════════
   Responsive
   ══════════════════════════════════════════════ */
@media (max-width: 768px) {
  .sidebar { width: 56px; min-width: 56px; }
  .sidebar-header h2 { font-size: 1rem; justify-content: center; }
  .sidebar-header .company-name,
  .sidebar-footer .user-info span,
  .nav-item span:not(.icon),
  .folder-section-label,
  .folder-tree-item .f-name,
  .folder-tree-item .toggle { display: none; }
  .nav-item { justify-content: center; padding: 10px; }
  .folder-tree-item { justify-content: center; padding: 8px; }
  .sidebar-footer { flex-direction: column; gap: 8px; padding: 12px; }
  .sidebar-footer .user-info strong { font-size: .7rem; text-align: center; }
  .toolbar { flex-wrap: wrap; padding: 12px 16px; gap: 8px; }
  .toolbar .search-box { min-width: 100%; order: 10; }
  .file-area { padding: 12px 16px; }
  .file-table td:nth-child(3), .file-table th:nth-child(3) { display: none; }
  .admin-page { padding: 16px; }
}