/* ===== Theme variables ===== */
:root,
[data-theme="light"] {
  --app-bg: #f8f9fa;
  --app-surface: #ffffff;
  --app-surface-2: #f8f9fa;
  --app-text: #212529;
  --app-text-muted: #6c757d;
  --app-border: #dee2e6;
  --app-primary: #0d6efd;
  --app-link: #0d6efd;
  --app-hover: rgba(13, 110, 253, 0.05);
  --app-overlay: rgba(255, 255, 255, 0.92);
  --app-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  --app-input-bg: #ffffff;
  --app-code-bg: #f8f9fa;
}

[data-theme="dark"] {
  --app-bg: #0f1117;
  --app-surface: #1a1d27;
  --app-surface-2: #252936;
  --app-text: #e8eaed;
  --app-text-muted: #9aa0a6;
  --app-border: #3c4043;
  --app-primary: #8ab4f8;
  --app-link: #8ab4f8;
  --app-hover: rgba(138, 180, 248, 0.08);
  --app-overlay: rgba(15, 17, 23, 0.94);
  --app-shadow: 0 2px 16px rgba(0, 0, 0, 0.35);
  --app-input-bg: #252936;
  --app-code-bg: #252936;
  color-scheme: dark;
}

html, body {
  background-color: var(--app-bg);
  color: var(--app-text);
}

[data-theme="dark"] .card,
[data-theme="dark"] .modal-content,
[data-theme="dark"] .dropdown-menu {
  background-color: var(--app-surface);
  color: var(--app-text);
  border-color: var(--app-border);
}

[data-theme="dark"] .card-header,
[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
  background-color: var(--app-surface-2);
  border-color: var(--app-border);
}

[data-theme="dark"] .table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--app-text);
  --bs-table-border-color: var(--app-border);
  --bs-table-hover-bg: var(--app-hover);
  --bs-table-striped-color: var(--app-text);
  --bs-table-active-color: var(--app-text);
}

[data-theme="dark"] .table thead th {
  color: var(--app-text);
  background-color: var(--app-surface-2);
  border-color: var(--app-border);
}

[data-theme="dark"] .table tbody td {
  color: var(--app-text);
  border-color: var(--app-border);
}

[data-theme="dark"] .sortable:hover {
  background-color: var(--app-hover) !important;
}

[data-theme="dark"] .sort-icon,
[data-theme="dark"] .table th[data-sort]::after {
  color: var(--app-text-muted);
}

[data-theme="dark"] .position-absolute.start-0 {
  background-color: var(--app-surface) !important;
  color: var(--app-text);
}

[data-theme="dark"] .link-tabs-container {
  background: var(--app-surface);
  border-color: var(--app-border);
}

[data-theme="dark"] #link-tabs {
  background: var(--app-surface-2);
  border-color: var(--app-border);
}

[data-theme="dark"] #link-tabs .nav-link {
  color: var(--app-text-muted);
}

[data-theme="dark"] .file-manager-table tbody td::before {
  color: var(--app-text-muted);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background-color: var(--app-input-bg);
  border-color: var(--app-border);
  color: var(--app-text);
}

[data-theme="dark"] .breadcrumb-item.active {
  color: var(--app-text-muted);
}

[data-theme="dark"] .breadcrumb-item a,
[data-theme="dark"] .folder-link,
[data-theme="dark"] .file-name {
  color: var(--app-link);
}

[data-theme="dark"] #loading-overlay {
  background-color: var(--app-overlay) !important;
}

[data-theme="dark"] .bg-light,
[data-theme="dark"] #link-content.bg-light {
  background-color: var(--app-code-bg) !important;
  color: var(--app-text) !important;
}

[data-theme="dark"] .folder-name:hover {
  background-color: var(--app-hover);
  color: var(--app-link);
}

[data-theme="dark"] .sortable:hover,
[data-theme="dark"] .file-list-item,
[data-theme="dark"] .file-progress {
  background-color: var(--app-surface-2);
}

[data-theme="dark"] .progress-percentage {
  background: var(--app-surface);
  color: var(--app-text-muted);
}

[data-theme="dark"] .nav-tabs .nav-link {
  color: var(--app-text-muted);
}

[data-theme="dark"] .nav-tabs .nav-link.active {
  background-color: var(--app-surface);
  border-color: var(--app-border);
  color: var(--app-text);
}

/* Theme toggle */
.theme-toggle-btn {
  width: 38px;
  height: 38px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

/* App shell */
.app-shell {
  padding-bottom: 2rem;
}

.app-topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.app-topbar .breadcrumb {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.app-topbar .breadcrumb::-webkit-scrollbar {
  display: none;
}

.user-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: flex-end;
}

.toolbar-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: stretch;
  margin-bottom: 1rem;
}

.toolbar-row .search-container {
  flex: 1 1 220px;
  min-width: 0;
  margin-right: 0;
  margin-bottom: 0;
}

.toolbar-row .toolbar-btn {
  flex: 1 1 auto;
  min-width: 110px;
  white-space: nowrap;
}

.system-title {
  text-align: center;
  margin: 1rem 0;
  font-size: 1.5rem;
  font-weight: 700;
}

/* Table */
.breadcrumb-item a {
  color: var(--app-link);
  text-decoration: none;
}

.breadcrumb-item a:hover {
  text-decoration: underline;
}

.table tbody tr:hover {
  background-color: var(--app-hover);
}

.btn-group {
  display: inline-flex;
  flex-wrap: nowrap !important;
  white-space: nowrap;
  width: auto;
}

.btn-group .btn {
  margin-right: 2px;
  flex-shrink: 0;
}

.file-name, .folder-link {
  max-width: 350px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-block;
  vertical-align: middle;
}

.file-icon, .folder-icon {
  display: inline-block;
  vertical-align: middle;
  margin-right: 5px;
}

.col-name { width: 30% !important; }
.col-actions { width: 25% !important; }
.col-size, .col-date { width: 15% !important; text-align: center !important; }

.table td.col-size,
.table td.col-date,
.table th.col-size,
.table th.col-date {
  text-align: center;
  vertical-align: middle;
}

td:nth-child(4), td:nth-child(5),
th:nth-child(4), th:nth-child(5) {
  text-align: center !important;
  vertical-align: middle !important;
}

.search-container {
  margin-right: 10px;
  min-width: 200px;
}

.search-container .input-group {
  border-radius: 4px;
  overflow: hidden;
}

.search-container .form-control:focus {
  box-shadow: none;
  border-color: var(--app-primary);
}

.overflow-auto {
  padding-bottom: 5px;
  -webkit-overflow-scrolling: touch;
}

.toastify {
  white-space: pre-line !important;
  max-width: min(500px, 92vw) !important;
}

/* ===== Mobile layout ===== */
@media (max-width: 768px) {
  .container.app-shell {
    padding-left: 12px;
    padding-right: 12px;
    margin-top: 0.75rem !important;
  }

  .system-title {
    font-size: 1.15rem;
    margin: 0.5rem 0 0.75rem;
  }

  .app-topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .user-controls {
    width: 100%;
    justify-content: space-between;
  }

  .user-controls .btn:not(.theme-toggle-btn) {
    flex: 1 1 calc(50% - 0.25rem);
    font-size: 0.8rem;
  }

  #logoutBtn {
    flex: 1 1 100%;
  }

  .toolbar-row {
    flex-direction: column;
  }

  .toolbar-row .search-container,
  .toolbar-row .toolbar-btn {
    width: 100%;
    flex: 1 1 100%;
  }

  .toolbar-row .toolbar-btn {
    min-height: 42px;
  }

  .upload-card .col-md-8,
  .upload-card .col-md-4 {
    margin-bottom: 0.5rem;
  }

  /* Card-style file list */
  .file-manager-table thead {
    display: none;
  }

  .file-manager-table tbody tr {
    display: block;
    margin-bottom: 0.75rem;
    border: 1px solid var(--app-border);
    border-radius: 10px;
    background: var(--app-surface);
    box-shadow: var(--app-shadow);
    padding: 0.35rem 0.5rem;
  }

  .file-manager-table tbody tr:hover {
    background: var(--app-surface);
  }

  .file-manager-table tbody td {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    border: none !important;
    padding: 0.35rem 0.5rem !important;
    white-space: normal !important;
    text-align: right !important;
  }

  .file-manager-table tbody td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--app-text-muted);
    text-align: left;
    flex-shrink: 0;
    margin-right: auto;
    padding-right: 0.5rem;
  }

  .file-manager-table tbody td.col-checkbox {
    justify-content: flex-start;
  }

  .file-manager-table tbody td.col-checkbox::before {
    content: '选择';
  }

  .file-manager-table tbody td.actions {
    flex-direction: column;
    align-items: stretch;
  }

  .file-manager-table tbody td.actions::before {
    content: '操作';
    margin-bottom: 0.25rem;
  }

  .file-manager-table tbody td.actions .btn-group {
    display: flex !important;
    flex-wrap: wrap !important;
    width: 100%;
    gap: 0.35rem;
  }

  .file-manager-table tbody td.actions .btn {
    flex: 1 1 calc(50% - 0.2rem);
    min-height: 38px;
    margin: 0 !important;
  }

  .file-manager-table tbody td:nth-child(2) {
    display: none;
  }

  .file-name, .folder-link {
    max-width: 100%;
    text-align: right !important;
  }

  .link-tabs-container .nav-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .link-content-container .link-controls {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  .pagination-controls {
    flex-wrap: wrap;
    justify-content: center !important;
    gap: 0.35rem;
    padding-top: 0.5rem;
  }

  .pagination-controls .position-absolute.start-0 {
    position: static !important;
    width: 100%;
    justify-content: center;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.35rem;
  }

  .btn {
    min-height: 38px;
  }
}

@media (max-width: 480px) {
  .user-controls .btn:not(.theme-toggle-btn) {
    flex: 1 1 100%;
  }

  .file-manager-table tbody td.actions .btn {
    flex: 1 1 100%;
  }
}

/* Login / install pages */
.auth-page {
  background: var(--app-bg);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  padding: 1.75rem;
  background: var(--app-surface);
  border-radius: 12px;
  box-shadow: var(--app-shadow);
  border: 1px solid var(--app-border);
}

.auth-card .auth-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.auth-title {
  text-align: center;
  color: var(--app-primary);
  margin-bottom: 0.25rem;
  font-size: 1.35rem;
}

.auth-subtitle {
  text-align: center;
  color: var(--app-text-muted);
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

/* Legacy upload / file list helpers */
.file-list-container {
  margin-top: 15px;
  border-top: 1px solid var(--app-border);
  padding-top: 15px;
}

.file-list-header {
  color: var(--app-text-muted);
  font-size: 0.875rem;
  padding: 8px;
  background-color: var(--app-surface-2);
  border-radius: 4px;
  margin-bottom: 10px;
}

.file-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  margin-bottom: 6px;
  background-color: var(--app-surface-2);
  border-radius: 4px;
  border: 1px solid var(--app-border);
}

.file-list-item:hover {
  background-color: var(--app-hover);
}

.file-list-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--app-text);
  font-size: 14px;
}

.file-size {
  margin-left: 12px;
  color: var(--app-text-muted);
  font-size: 12px;
  white-space: nowrap;
}

.btn-close-sm {
  font-size: 0.8rem;
  padding: 0.25rem;
  margin-left: 12px;
}

.btn-close:focus {
  box-shadow: none;
}

.sortable::after {
  transition: opacity 0.2s ease;
}

.sortable:hover::after {
  opacity: 1 !important;
}

.toast-with-close .toast-close {
  color: white;
  font-size: 20px;
  font-weight: bold;
  background: transparent;
  border: none;
  cursor: pointer;
  opacity: 0.8;
  margin-left: 10px;
  padding: 0 5px;
}

.toast-with-close .toast-close:hover {
  opacity: 1;
}