/* Light theme (default) — follows OS via prefers-color-scheme */
:root {
  color-scheme: light dark;

  --bg: #f8f9fa;
  --surface: #ffffff;
  --surface-hover: #f1f3f4;
  --card-bg: #f0f4f9;
  --card-hover: #e8f0fe;
  --border: #dadce0;
  --text: #202124;
  --text-secondary: #5f6368;
  --accent: #1a73e8;
  --accent-hover: #1765cc;
  --accent-soft: #e8f0fe;
  --danger: #d93025;
  --danger-soft: #fce8e6;
  --success: #188038;
  --search-bg: #e9eef6;
  --chip-border: #c2d7f7;
  --brand-gradient: linear-gradient(135deg, #e8f0fe, #d2e3fc);
  --overlay-hover: rgba(0, 0, 0, 0.06);
  --check-ring: #ffffff;
  --drop-overlay-bg: rgba(255, 255, 255, 0.88);
  --modal-backdrop: rgba(0, 0, 0, 0.4);
  --toast-bg: #323232;
  --toast-text: #ffffff;
  --sidebar-scrim: rgba(0, 0, 0, 0.35);
  --badge-image-bg: #fce8e6;
  --badge-image-fg: #d93025;
  --badge-folder-bg: #fef7e0;
  --badge-folder-fg: #f9ab00;
  --badge-file-bg: #e8eaed;
  --badge-file-fg: #5f6368;
  --badge-video-bg: #e8f0fe;
  --badge-video-fg: #1a73e8;
  --folder-art: #f9ab00;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(60, 64, 67, 0.12), 0 1px 3px rgba(60, 64, 67, 0.08);
  --shadow-md: 0 1px 3px rgba(60, 64, 67, 0.15), 0 4px 8px rgba(60, 64, 67, 0.1);
  --sidebar-w: 260px;
  font-family: "Google Sans Flex", "Roboto", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131314;
    --surface: #1e1f20;
    --surface-hover: #2d2e30;
    --card-bg: #282a2d;
    --card-hover: #32353a;
    --border: #3c4043;
    --text: #e3e3e3;
    --text-secondary: #9aa0a6;
    --accent: #8ab4f8;
    --accent-hover: #aecbfa;
    --accent-soft: #394457;
    --danger: #f28b82;
    --danger-soft: #3c2626;
    --success: #81c995;
    --search-bg: #2d2e30;
    --chip-border: #394457;
    --brand-gradient: linear-gradient(135deg, #394457, #2d3b55);
    --overlay-hover: rgba(255, 255, 255, 0.08);
    --check-ring: #1e1f20;
    --drop-overlay-bg: rgba(19, 19, 20, 0.92);
    --modal-backdrop: rgba(0, 0, 0, 0.65);
    --toast-bg: #e3e3e3;
    --toast-text: #202124;
    --sidebar-scrim: rgba(0, 0, 0, 0.55);
    --badge-image-bg: #3c2626;
    --badge-image-fg: #f28b82;
    --badge-folder-bg: #3c3420;
    --badge-folder-fg: #fdd663;
    --badge-file-bg: #3c4043;
    --badge-file-fg: #9aa0a6;
    --badge-video-bg: #394457;
    --badge-video-fg: #8ab4f8;
    --folder-art: #fdd663;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35), 0 1px 3px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.3);
  }
}

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

body {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.sidebar,
.main,
.file-panel,
.file-row,
.modal-box,
.search,
.pill-toolbar,
.new-menu,
.context-menu,
.upload-tray {
  transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

body.select-mode .file-row .card-check {
  opacity: 1;
}

.material-symbols-outlined {
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
  font-size: 22px;
  vertical-align: middle;
}

.hidden {
  display: none !important;
}

.app {
  display: flex;
  min-height: 100vh;
}

/* —— Sidebar —— */
.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 0.5rem 0.75rem 1rem;
  flex-shrink: 0;
  z-index: 40;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 0.5rem 1rem;
}

.brand-logo {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--brand-gradient);
  border-radius: 50%;
}

.brand-text {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: -0.02em;
}

.btn-new {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0.5rem 0.75rem;
  padding: 0.65rem 1.5rem 0.65rem 1rem;
  border: none;
  border-radius: 24px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, background 0.15s;
}

.btn-new:hover {
  box-shadow: var(--shadow-md);
  background: var(--surface-hover);
}

.btn-new .material-symbols-outlined {
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 50%;
  padding: 2px;
  font-size: 20px;
}

.new-menu {
  position: absolute;
  left: 0.75rem;
  top: 7.5rem;
  min-width: 220px;
  background: var(--surface);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  padding: 0.35rem 0;
  z-index: 50;
}

.new-menu-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.6rem 1rem;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.new-menu-item:hover {
  background: var(--surface-hover);
}

.new-menu-item .material-symbols-outlined {
  color: var(--text-secondary);
  font-size: 20px;
}

.sidebar {
  position: relative;
}

.sidebar-nav {
  flex: 1;
  padding: 0 0.25rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 0.55rem 1rem;
  border: none;
  border-radius: 0 24px 24px 0;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
}

.nav-item .nav-icon {
  font-size: 20px;
}

.storage-card {
  margin-top: auto;
  padding: 0.85rem;
  background: var(--surface-hover);
  border-radius: var(--radius);
}

.storage-row {
  display: flex;
  gap: 0.65rem;
  margin-bottom: 0.5rem;
}

.storage-icon {
  color: var(--accent);
  font-size: 20px;
}

.storage-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.storage-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.storage-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.storage-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.35s ease;
}

.sidebar-backdrop {
  display: none;
}

/* —— Main —— */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg);
}

.topbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1.25rem;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 30;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-btn:hover {
  background: var(--surface-hover);
}

.icon-btn.subtle {
  width: 36px;
  height: 36px;
}

.search-wrap {
  flex: 1;
  max-width: 720px;
  position: relative;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 20px;
  pointer-events: none;
}

.search {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.75rem;
  border: none;
  border-radius: 24px;
  background: var(--search-bg);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  transition: background 0.2s, box-shadow 0.2s;
}

.search:focus {
  outline: none;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.pill-toolbar {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2px;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.pill-btn {
  width: 40px;
  height: 36px;
  border: none;
  border-radius: 20px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pill-btn:hover {
  background: var(--surface-hover);
}

.pill-btn.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.pill-btn.select-active {
  background: var(--accent-soft);
  color: var(--accent);
}

.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.25rem 1.5rem 0.75rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem;
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--text);
}

.breadcrumbs button {
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-size: inherit;
  font-family: inherit;
}

.breadcrumbs button:hover {
  background: var(--surface-hover);
}

.breadcrumbs .sep {
  color: var(--text-secondary);
  margin: 0 0.1rem;
}

.breadcrumbs .current {
  font-weight: 500;
}

.selection-chip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0 1.5rem 0.75rem;
  padding: 0.65rem 1rem;
  background: var(--accent-soft);
  border-radius: 24px;
  border: 1px solid var(--chip-border);
}

.selection-count {
  font-weight: 500;
  color: var(--accent);
  font-size: 0.9rem;
}

.chip-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.chip-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.4rem 0.85rem;
  border: none;
  border-radius: 18px;
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
}

.chip-btn:hover {
  background: var(--surface-hover);
}

.chip-btn.danger {
  color: var(--danger);
}

.chip-btn .material-symbols-outlined {
  font-size: 18px;
}

.file-panel {
  flex: 1;
  position: relative;
  padding: 0 1.25rem 2rem;
  min-height: 400px;
}

/* —— List view —— */
.file-header {
  display: grid;
  grid-template-columns: 40px 1fr 100px 140px 48px;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.25rem;
}

.file-header.grid-view {
  display: none;
}

.file-list.list-view {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}

.file-list.list-view .file-row {
  display: grid;
  grid-template-columns: 40px 1fr 100px 140px 48px;
  gap: 0.5rem;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.12s;
}

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

.file-list.list-view .file-row:hover,
.file-list.list-view .file-row.selected {
  background: var(--accent-soft);
}

.col-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* —— Grid / Drive cards —— */
.file-list.grid-view {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.file-list.grid-view .file-row {
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
  min-height: 0;
}

.file-list.grid-view .file-row:hover {
  background: var(--card-hover);
  box-shadow: var(--shadow-sm);
}

.file-list.grid-view .file-row.selected {
  border-color: var(--accent);
  background: var(--card-hover);
}

.drive-card-head {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.5rem 0.35rem 0.65rem;
  min-height: 40px;
}

.type-badge {
  width: 20px;
  height: 20px;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.type-badge.image {
  background: var(--badge-image-bg);
  color: var(--badge-image-fg);
}

.type-badge.image .material-symbols-outlined {
  font-size: 14px;
}

.type-badge.folder {
  background: var(--badge-folder-bg);
  color: var(--badge-folder-fg);
}

.type-badge.folder .material-symbols-outlined {
  font-size: 14px;
}

.type-badge.file {
  background: var(--badge-file-bg);
  color: var(--badge-file-fg);
}

.type-badge.file .material-symbols-outlined {
  font-size: 14px;
}

.type-badge.video {
  background: var(--badge-video-bg);
  color: var(--badge-video-fg);
}

.type-badge.video .material-symbols-outlined {
  font-size: 14px;
}

.card-title {
  flex: 1;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.card-menu-btn {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s;
}

.file-row:hover .card-menu-btn,
.file-row.selected .card-menu-btn,
body.select-mode .card-menu-btn {
  opacity: 1;
}

.card-menu-btn:hover {
  background: var(--overlay-hover);
}

.card-thumb {
  margin: 0 0.65rem;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-thumb.is-video {
  position: relative;
}

.video-play-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  font-size: 36px !important;
  color: #fff;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.45));
  pointer-events: none;
}

.card-thumb .folder-art {
  font-size: 64px;
  color: var(--folder-art);
}

.card-thumb .file-art {
  font-size: 48px;
  color: var(--text-secondary);
}

.drive-card-foot {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem;
  margin-top: auto;
}

.user-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, #34a853, #1a73e8);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.card-meta {
  font-size: 0.72rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-check {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 3;
  opacity: 0;
  transition: opacity 0.15s;
}

.file-list.grid-view .file-row {
  position: relative;
}

.file-row:hover .card-check,
.file-row.selected .card-check,
body.select-mode .card-check {
  opacity: 1;
}

.card-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 0 2px var(--check-ring);
  border-radius: 2px;
}

.file-list.grid-view .col-size,
.file-list.grid-view .col-date,
.file-list.grid-view .col-actions,
.file-list.grid-view .list-only {
  display: none !important;
}

/* List row extras */
.list-thumb {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  object-fit: cover;
  margin-right: 0.5rem;
}

.list-name-cell {
  display: flex;
  align-items: center;
  min-width: 0;
}

.list-name-cell span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.col-size,
.col-date {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.row-menu-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  color: var(--text-secondary);
}

.row-menu-btn:hover {
  background: var(--surface-hover);
}

/* Context menu */
.context-menu {
  position: fixed;
  z-index: 400;
  min-width: 180px;
  background: var(--surface);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  padding: 0.35rem 0;
}

.context-menu button {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.55rem 1rem;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.context-menu button:hover {
  background: var(--surface-hover);
}

.context-menu button.danger {
  color: var(--danger);
}

.context-menu .material-symbols-outlined {
  font-size: 20px;
  color: var(--text-secondary);
}

/* Empty & loading */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
  text-align: center;
}

.empty-illustration {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.empty-illustration .material-symbols-outlined {
  font-size: 56px;
  color: var(--accent);
}

.empty-title {
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.empty-hint {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 360px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: 24px;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 4rem;
  color: var(--text-secondary);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Drop overlay */
.drop-overlay {
  position: fixed;
  inset: 0;
  background: var(--drop-overlay-bg);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.drop-overlay-inner {
  text-align: center;
  padding: 2.5rem 3rem;
  border: 3px dashed var(--accent);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.drop-icon {
  font-size: 56px !important;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: var(--modal-backdrop);
}

.modal-box {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-md);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.modal-body {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.modal-list {
  list-style: none;
  max-height: 120px;
  overflow-y: auto;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
}

.modal-list li {
  padding: 0.2rem 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.btn-text {
  background: none;
  border: none;
  color: var(--accent);
  font-family: inherit;
  font-weight: 500;
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 4px;
}

.btn-text:hover {
  background: var(--accent-soft);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border: none;
  padding: 0.5rem 1.25rem;
  border-radius: 4px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
}

.btn-danger:hover {
  background: #b3261e;
}

/* Upload tray */
.upload-tray {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  width: 360px;
  max-height: 300px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.upload-tray-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}

.btn-text-sm {
  background: none;
  border: none;
  color: var(--accent);
  font-family: inherit;
  cursor: pointer;
  font-size: 0.85rem;
}

.upload-list {
  list-style: none;
  overflow-y: auto;
  padding: 0.5rem;
}

.upload-item {
  padding: 0.5rem;
  font-size: 0.8rem;
}

.upload-item-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 0.35rem;
}

.upload-progress {
  height: 4px;
  background: var(--bg);
  border-radius: 2px;
  overflow: hidden;
}

.upload-progress-bar {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.15s;
}

.upload-item.done .upload-progress-bar {
  background: var(--success);
}

.upload-item.error .upload-progress-bar {
  background: var(--danger);
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--toast-bg);
  color: var(--toast-text);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 0.9rem;
  z-index: 600;
  box-shadow: var(--shadow-md);
}

.toast.error {
  background: var(--danger);
  color: #fff;
}

/* Media preview viewer */
body.preview-open {
  overflow: hidden;
}

.preview-viewer {
  position: fixed;
  inset: 0;
  z-index: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
}

.preview-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  max-width: 100vw;
  max-height: 100vh;
}

.preview-toolbar {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  color: #fff;
  flex-shrink: 0;
}

.preview-toolbar .icon-btn {
  color: #fff;
}

.preview-toolbar .icon-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.preview-title {
  font-size: 1rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
  padding: 0 0.5rem;
}

.preview-actions {
  display: flex;
  gap: 0.25rem;
}

.preview-nav {
  flex-shrink: 0;
}

.preview-nav-next {
  grid-column: 4;
}

.preview-nav.hidden,
.preview-nav-next.hidden {
  visibility: hidden;
  pointer-events: none;
}

.preview-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 0 3.5rem 1rem;
}

.preview-stage img {
  max-width: 100%;
  max-height: calc(100vh - 120px);
  object-fit: contain;
  border-radius: 4px;
  user-select: none;
}

.preview-stage video {
  max-width: 100%;
  max-height: calc(100vh - 120px);
  width: auto;
  height: auto;
  border-radius: 4px;
  background: #000;
  outline: none;
}

.preview-counter {
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.85rem;
  padding-bottom: 0.75rem;
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: var(--shadow-md);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: var(--sidebar-scrim);
    z-index: 35;
  }

  .sidebar-backdrop.hidden {
    display: none;
  }

  .file-list.grid-view {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.75rem;
  }

  .topbar {
    padding: 0.5rem 0.75rem;
  }

  .content-header,
  .file-panel {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .selection-chip {
    margin-left: 0.75rem;
    margin-right: 0.75rem;
  }

  .preview-stage {
    padding: 0 0.5rem 1rem;
  }

  .preview-nav.preview-nav-next {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    background: rgba(0, 0, 0, 0.45);
  }

  .preview-nav#previewPrev {
    position: absolute;
    left: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    background: rgba(0, 0, 0, 0.45);
  }
}