:root {
  color-scheme: light;
  /* Neutrals */
  --bg: #f6f6f6;
  --surface: #fbfbfb;
  --surface-subtle: #f3f3f3;
  --fg: #1e2127;
  --muted: #646a75;
  --sidebar-fg: #5f6672;
  --border: #dde1e6;
  --shadow-faint: rgba(0, 0, 0, 0.06);
  --shadow-soft: rgba(0, 0, 0, 0.12);
  --shadow-medium: rgba(0, 0, 0, 0.18);
  --overlay-backdrop: rgba(30, 33, 39, 0.45);
  --overlay-shadow: rgba(30, 33, 39, 0.18);

  --app-bar-background: var(--surface-subtle);

  /* Accent (primary action, selection, focus) */
  --accent: #3f6ad8;
  --accent-hover: #365cb9;
  --on-accent: #ffffff;

  /* Soft tints & outlines (for chips, row hovers, subtle fills) */
  --accent-soft: rgba(63, 106, 216, 0.12);
  --accent-elevated: rgba(63, 106, 216, 0.16);
  --accent-elevated-strong: rgba(63, 106, 216, 0.22);
  --accent-outline: rgba(63, 106, 216, 0.45);
  --accent-outline-strong: rgba(63, 106, 216, 0.9);
  --accent-focus: rgba(63, 106, 216, 0.85);
  --surface-overlay: rgba(255, 255, 255, 0.82);

  /* States specific to explorer UX */
  --row-hover-bg: rgba(63, 106, 216, 0.06);
  --row-active-bg: rgba(63, 106, 216, 0.12);
  --sidebar-hover-bg: rgba(63, 106, 216, 0.08);
  --sidebar-active-bg: rgba(63, 106, 216, 0.16);
  --selection-ring: #9bb6ff;

  /* Semantic colors */
  --success: #2e7d6b;
  --success-subtle: rgba(46, 125, 107, 0.12);
  --warning: #b98a2e;
  --warning-subtle: rgba(185, 138, 46, 0.12);
  --danger: #cc5a52;
  --danger-border: rgba(204, 90, 82, 0.45);
  --danger-soft: rgba(204, 90, 82, 0.12);
  --danger-subtle: rgba(204, 90, 82, 0.08);

  /* File-type accents (used for icons/labels) */
  --file-folder: #e6a23c;   /* folders */
  --file-doc: #3f6ad8;      /* docs */
  --file-code: #5b9b5f;     /* code */
  --file-image: #9a6bd1;    /* images */
  --file-audio: #db6f9a;    /* audio */
  --file-archive: #9c7a59;  /* zips */

  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  overflow: hidden;
}

#app {
  height: 100%;
  background: var(--bg);
}

button {
  font: inherit;
  border-radius: 2px;
  border: 1px solid transparent;
  padding: 0.35rem 0.85rem;
  background: var(--accent);
  color: var(--on-accent);
  cursor: pointer;
  font-weight: 500;
  transition: background 0.15s ease, border-color 0.15s ease;
}

button[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

button:hover:not([disabled]) {
  background: var(--accent-hover);
}

a.button-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font: inherit;
  border-radius: 2px;
  border: 1px solid transparent;
  padding: 0.35rem 0.85rem;
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
  font-weight: 500;
  transition: background 0.15s ease, border-color 0.15s ease;
}

a.button-link[aria-disabled='true'] {
  opacity: 0.55;
  pointer-events: none;
}

a.button-link:hover:not([aria-disabled='true']) {
  background: var(--accent-hover);
}

button.secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}

button.secondary:hover:not([disabled]) {
  background: var(--surface-subtle);
}

button.danger {
  background: transparent;
  color: var(--danger);
  border-color: var(--danger-border);
}

button.danger:hover:not([disabled]) {
  border-color: var(--danger);
  background: var(--danger-subtle);
}

button.icon-button {
  padding: 0.25rem 0.55rem;
  min-width: auto;
}

button.icon-button.ghost {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 0.2rem;
}

button.icon-button.ghost:hover:not([disabled]) {
  color: var(--danger);
  background: transparent;
}

.with-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.icon-inline {
  width: 1rem;
  height: 1rem;
}

.icon {
  width: 1rem;
  height: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.icon path {
  stroke: currentColor;
  stroke-width: 1.6;
  fill: none;
}

.icon--fill path {
  stroke: none;
  fill: currentColor;
}

.app-shell {
  height: 100%;
  display: flex;
  flex-direction: column;
  color: var(--fg);
  background: var(--bg);
}

.app-bar {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.6rem 1.5rem 0.4rem;
  background: var(--app-bar-background);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-bar__main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.app-bar__meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 0 0 auto;
}

.app-bar h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.app-bar__hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.app-bar__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-bar__status {
  margin: 0 1rem;
  min-width: 220px;
}

.app-bar__status .status-banner {
  margin: 0;
}

.app-bar__search {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1 1 320px;
  max-width: 420px;
  min-width: 240px;
  margin: 0 auto;
}

.app-bar__search input[type='search'] {
  flex: 1;
  min-width: 180px;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface-subtle);
  color: var(--fg);
}

.app-bar__search input[type='search']:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.app-bar__search-clear {
  border: none;
  background: transparent;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0.2rem 0.3rem;
}

.app-bar__search-clear:hover {
  text-decoration: underline;
}

.app-bar__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.app-bar__links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-bar__link {
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.app-bar__link:hover {
  background: var(--sidebar-hover-bg);
  color: var(--fg);
}

.app-bar__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.app-bar__link.active {
  background: var(--sidebar-active-bg);
  color: var(--fg);
  font-weight: 600;
}

.app-bar__link-count {
  font-size: 0.75rem;
  color: var(--muted);
}

.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 320px;
  min-height: 0;
  overflow: hidden;
}

.tags-main {
  flex: 1;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 1.5rem;
  min-height: 0;
  overflow: hidden;
}

.preview-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.preview-workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 0;
}

.preview-workspace__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.5rem 0;
}

.preview-workspace__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.preview-workspace__meta h2 {
  margin: 0;
  font-size: 1.1rem;
}

.preview-workspace__meta .meta {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
}

.document-drag-preview {
  position: fixed;
  pointer-events: none;
  top: -9999px;
  left: -9999px;
  width: var(--drag-preview-size, 96px);
  height: var(--drag-preview-size, 96px);
  z-index: 9999;
}

.document-drag-preview__thumb {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 64px;
  height: 64px;
  border-radius: 6px;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  background-color: rgba(32, 34, 40, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  transform: translate(-50%, -50%) rotate(var(--rotation-deg, 0deg));
  transform-origin: center;
}

.document-drag-preview__thumb .document-thumbnail,
.document-drag-preview__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.document-drag-preview__thumb .thumb-placeholder,
.document-drag-preview__thumb .thumb-placeholder * {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.document-drag-preview__folder-thumb {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.document-drag-preview__folder-thumb svg {
  width: 48px;
  height: 48px;
  color: var(--accent-strong, var(--accent));
}

.document-drag-preview__folder-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.9);
}

.document-drag-preview__count {
  position: absolute;
  bottom: 4px;
  right: 4px;
  background-color: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
  pointer-events: none;
}

.preview-workspace__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.preview-workspace__body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.preview-workspace__object {
  width: 100%;
  height: 100%;
  border: none;
}

.tags-panel__body {
  overflow-y: auto;
}

.tags-table {
  width: 100%;
  overflow: auto;
}

.tags-table table {
  width: 100%;
  border-collapse: collapse;
  min-width: 320px;
}

.tags-table th,
.tags-table td {
  padding: 0.45rem 0.6rem;
  text-align: left;
  border-bottom: 1px solid var(--divider);
  font-size: 0.85rem;
}

.tags-table th.numeric,
.tags-table td.numeric {
  text-align: right;
}

.tags-table th.actions,
.tags-table td.actions {
  text-align: right;
  width: 0;
}

.tags-table tbody tr:hover {
  background: var(--surface-subtle);
}

.tags-table tr.editing {
  background: var(--sidebar-hover-bg);
}

.tags-table__label {
  max-width: 24rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tags-table__swatch {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border-radius: 2px;
  box-shadow: inset 0 0 0 1px var(--shadow-faint);
}

.tags-panel__error {
  margin: 0.5rem 0;
  color: var(--danger);
  font-size: 0.8rem;
}

.tags-table__label-input {
  width: 100%;
}

.tags-table__color-editor {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tags-table__color-picker {
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
}

.tags-table__edit-controls {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
}

.tags-table__row-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
}

.correspondents-panel .header-actions {
  gap: 0.5rem;
}

.correspondents-actions__form {
  display: flex;
  gap: 0.4rem;
}

.correspondents-actions__form input {
  min-width: 14rem;
}

.correspondent-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.correspondent-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
  font-size: 0.9rem;
}

.correspondent-pill__label {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.correspondent-pill__label strong {
  font-size: 0.8rem;
  text-transform: capitalize;
  color: var(--muted);
}

.correspondent-pill__remove {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  color: var(--muted);
  padding: 0;
}

.correspondent-pill__remove:hover {
  color: var(--danger);
}

.correspondent-form {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.correspondent-form input,
.correspondent-form select {
  min-height: 32px;
}

.preview-workspace__message {
  color: var(--muted);
  font-size: 0.95rem;
}

.preview-workspace__metadata {
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 0.75rem;
  background: var(--surface);
  max-height: 180px;
  overflow: auto;
}

.preview-workspace__metadata h3 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}

.column {
  background: transparent;
  border: none;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.column + .column {
  border-left: 1px solid var(--border);
  padding-left: 1.25rem;
}

.column-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0 0 0.5rem;
  border-bottom: 1px solid var(--border);
}

.column-header__titles {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.breadcrumb-item a {
  text-decoration: none;
  color: var(--accent);
}

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

.breadcrumb-current {
  font-weight: 600;
  color: var(--fg);
}

.breadcrumb-separator {
  color: var(--muted);
}

.column-header h2 {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
}

.column-subtitle {
  margin-top: 0.25rem;
  font-size: 0.78rem;
  color: var(--muted);
}


.column-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.column-body.scrollable {
  overflow-y: auto;
}

.folder-tree {
  list-style: none;
  margin: 0;
  padding: 0;
}

.folder-node {
  margin: 0;
}

.folder-row {
  display: flex;
  align-items: center;
  gap: 0.22rem;
  padding: 0.16rem 0.26rem;
  border-radius: 2px;
  cursor: pointer;
  color: inherit;
  transition: background 0.12s ease, color 0.12s ease;
  position: relative;
}

.folder-row span.name {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: 3rem;
}

.folder-row span.name .folder-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  color: var(--accent);
}

.folder-row:hover {
  background: var(--sidebar-hover-bg);
  color: var(--fg);
}

.folder-row.active {
  background: var(--sidebar-active-bg);
  color: var(--fg);
}

.folder-row .toggle {
  width: 1.05rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  flex-shrink: 0;
  transition: transform 0.18s ease;
}

.folder-row .toggle.invisible {
  visibility: hidden;
}

.toggle-icon {
  width: 0.9rem;
  height: 0.9rem;
  transition: transform 0.18s ease;
}

.folder-row .toggle.expanded .toggle-icon {
  transform: rotate(90deg);
}

.folder-row__actions {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
  background-color: var(--surface-overlay);
  border-radius: 8px;
  padding: 0 0.18rem;
}

.folder-row__actions .icon-button {
  margin: 0;
}

.folder-row:hover .folder-row__actions,
.folder-row:focus-within .folder-row__actions {
  opacity: 1;
  pointer-events: auto;
}

.folder-children {
  list-style: none;
  margin: 0 0 0 0.45rem;
  padding: 0;
}

.folder-children.folder-children--level1 {
  margin-left: 0;
}

.sidebar-section {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.sidebar {
  gap: 0.28rem;
  overflow-y: auto;
  padding: 1.25rem;
  color: var(--sidebar-fg);
}

.sidebar-section:first-of-type,
.sidebar-section--folders {
  margin-top: 0;
}

.sidebar-section--folders {
  display: flex;
  flex-direction: column;
}

.sidebar-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sidebar-section__header h3 {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: inherit;
}

.sidebar-item {
  border: none;
  background: transparent;
  padding: 0.16rem 0.26rem;
  text-align: left;
  color: var(--sidebar-fg);
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
  display: flex;
  align-items: center;
  gap: 0.38rem;
  width: 100%;
}

.sidebar-item:hover {
  background: var(--sidebar-hover-bg);
  color: var(--fg);
}

.sidebar-item.active {
  background: var(--sidebar-active-bg);
  color: var(--fg);
  font-weight: 600;
}

.sidebar-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sidebar-item__icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  color: var(--accent);
}

.sidebar-item.active .sidebar-item__icon {
  color: currentColor;
}

.sidebar-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.25rem 0 0.1rem;
}

.sidebar-tag-pill {
  border: 1px solid var(--sidebar-pill-border, rgba(15, 23, 42, 0.08));
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  background: var(--surface-soft);
  color: var(--fg);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.sidebar-tag-pill:hover {
  transform: none;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.16);
  border-color: var(--accent-soft, rgba(59, 130, 246, 0.35));
}

.sidebar-tag-pill:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sidebar-tag-pill.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.sidebar-correspondent-list {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.sidebar-correspondent-item {
  display: block;
  width: 100%;
  background: transparent;
  border-radius: 4px;
  padding: 0.35rem 0.5rem;
  text-align: left;
  color: var(--sidebar-fg);
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.15s ease, box-shadow 0.15s ease;
}

.sidebar-correspondent-item:hover {
  background: var(--sidebar-hover-bg);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
  color: var(--fg);
}

.sidebar-correspondent-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sidebar-correspondent-item.active {
  background: var(--accent-soft, rgba(59, 130, 246, 0.18));
  box-shadow: 0 0 0 1px var(--accent-soft, rgba(59, 130, 246, 0.24));
  color: var(--fg);
}


.documents-panel {
  padding: 1.25rem 1.25rem 0 1.25rem;
  background-color: var(--surface);
}

.tags-panel,
.correspondents-panel {
  padding: 1.25rem;
}

.folder-row.is-drop-target {
  outline: 2px dashed var(--accent);
  outline-offset: 2px;
}

.documents-panel .column-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.documents-panel .column-header .header-actions {
  display: flex;
  gap: 0.5rem;
}


.documents-panel .column-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.documents-panel .column-toolbar {
  flex-shrink: 0;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.documents-panel .documents-scroll {
  overflow-y: auto;
  border: none;
  background: transparent;
  min-height: 0;
  padding-right: 0.3rem;
}

.documents-panel table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-top: 0.4rem;
}

.documents-panel thead th {
  border-bottom: 1px solid var(--border);
  background-color: var(--surface);
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 0.45rem 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}


.documents-panel th,
.documents-panel td {
  padding: 0.45rem 0.6rem;
  text-align: left;
}

.documents-panel th.thumb-column,
.documents-panel td.thumb-cell {
  width: 54px;
  text-align: center;
}

.document-thumbnail-wrapper {
  width: 48px;
  height: 48px;
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.document-thumbnail {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: var(--surface-subtle);
  border-radius: 1px;
  box-shadow: 0 1px 3px var(--shadow-medium);
}

.thumb-placeholder {
  width: 100%;
  height: 100%;
  border-radius: 1px;
  background: var(--surface-subtle);
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  box-shadow: 0 1px 3px var(--shadow-medium);
}

.thumb-icon {
  width: 100%;
  height: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.thumb-icon svg {
  width: 32px;
  height: 32px;
}

.documents-panel th.actions-column,
.documents-panel td.actions {
  width: 1%;
  white-space: nowrap;
}

.documents-panel tbody tr {
  background: transparent;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s ease;
}

.documents-panel tbody tr:last-child {
  border-bottom: none;
}

.documents-panel tbody tr:hover {
  background: var(--surface-subtle);
}

.documents-panel tbody tr.folder {
  cursor: pointer;
  font-weight: 600;
}

.documents-panel tbody tr.folder.focused {
  box-shadow: inset 2px 0 0 var(--accent-outline);
  background: var(--sidebar-hover-bg);
}

.documents-panel tbody tr.document {
  cursor: pointer;
}

.documents-panel tbody tr.document.selected {
  background: var(--accent-soft);
  box-shadow: inset 2px 0 0 var(--accent-outline-strong);
}

.documents-panel tbody tr.document,
.documents-panel tbody tr.document * {
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
}

.documents-panel tbody tr.document.focused:not(.selected) {
  box-shadow: inset 2px 0 0 var(--accent-outline);
}

.doc-name {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.doc-name__title {
  font-weight: 600;
}

.doc-name__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.documents-panel tbody tr.document.dragging {
  opacity: 0.4;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.32rem;
  margin-bottom: 0.5rem;
}

.filter-bar input[type='search'] {
  flex: 1;
  min-width: 180px;
}

.filter-actions {
  display: flex;
  gap: 0.32rem;
}

.search-hint {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.35rem;
  border-radius: 2px;
  background: var(--surface-subtle);
  color: var(--fg);
  font-size: 0.74rem;
  border: 1px solid transparent;
}

.tag-chip {
  gap: 0.25rem;
}

.empty-state {
  border: 1px dashed var(--border);
  border-radius: 0;
  text-align: center;
  padding: 1.1rem 0.9rem;
  color: var(--muted);
  margin-top: 0.75rem;
  background: var(--surface-subtle);
}

.detail-panel {
  position: relative;
  padding: 1.25rem;
  overflow-y: auto;
}

.detail-panel .column-body {
  gap: 1rem;
}

.detail-panel .column-body.scrollable {
  overflow: visible;
}

.detail-actions {
  display: flex;
  gap: 0.32rem;
  margin: 0.6rem 0;
}

.preview-pane {
  margin-top: 0.4rem;
  border: none;
  border-radius: 0;
  background: transparent;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
}

.thumbnail-preview {
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
  margin: 0.4rem 0 0.6rem;
}

.thumbnail-image {
  max-width: 100%;
  border-radius: 0;
  box-shadow: none;
}

.detail-panel .meta {
  font-size: 0.9rem;
  color: var(--muted);
}

.detail-panel .doc-title-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0.25rem 0 0.5rem;
}

.detail-panel .doc-title-edit {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: 100%;
}

.detail-panel .doc-title-edit input {
  flex: 1;
  min-width: 0;
}

.status-inline {
  font-size: 0.85rem;
  margin-top: 0.2rem;
}

.status-inline.error {
  color: var(--danger);
}

.bulk-detail-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0.6rem 0;
}

.bulk-detail-actions .inline {
  display: flex;
  gap: 0.4rem;
}

.bulk-move {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin: 0.6rem 0;
}

.bulk-move select {
  max-width: 100%;
}

.preview-stack {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-stack--stacked {
  width: 100%;
  min-height: 320px;
  flex-shrink: 0;
}

.preview-stack__item {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 120ms ease;
  filter: drop-shadow(0 2px 6px var(--shadow-soft));
  transform-origin: center;
  border-radius: 6px;
  overflow: hidden;
  pointer-events: none;
}

.preview-stack .preview-stack__item.orientation-portrait {
  width: 80%;
  height: 100%;
}

.preview-stack .preview-stack__item.orientation-landscape {
  width: 100%;
  height: 80%;
}

.preview-stack__image {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: transparent;
  cursor: pointer;
  transition:
    outline-color 120ms ease,
    box-shadow 120ms ease,
    filter 120ms ease,
    background-color 120ms ease;
  outline: 2px solid transparent;
  outline-offset: -2px;
  pointer-events: auto;
}

.preview-stack__image:hover,
.preview-stack__image:focus-visible {
  outline-color: var(--accent-focus);
  box-shadow:
    inset 0 0 0 999px var(--accent-elevated),
    0 6px 18px var(--accent-elevated-strong);
  filter: saturate(118%) brightness(1.05);
}

.preview-pane--stack {
  min-height: 260px;
}

.bulk-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.4rem 0 0.6rem;
}

.detail-panel dl {
  margin: 0;
}

.detail-panel dt {
  font-weight: 600;
  margin-top: 0.8rem;
}

.detail-panel dd {
  margin: 0.2rem 0 0;
}

.detail-panel .tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.5rem;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.18rem;
  background: var(--surface-subtle);
  color: var(--fg);
  padding: 0.2rem 0.45rem;
  border-radius: 2px;
  font-size: 0.78rem;
  border: 1px solid var(--border);
}

.tag-pill button {
  background: none;
  border: none;
  color: inherit;
  padding: 0;
  cursor: pointer;
  font-size: 0.85rem;
  opacity: 0.8;
}

.tag-pill button:hover {
  opacity: 1;
}

input,
textarea,
select {
  font: inherit;
  border-radius: 2px;
  border: 1px solid var(--border);
  padding: 0.4rem 0.5rem;
  background: var(--surface);
  color: inherit;
  width: 100%;
  box-sizing: border-box;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
  background: var(--surface);
}

textarea {
  resize: vertical;
}

form.inline {
  display: flex;
  gap: 0.32rem;
  margin-top: 0.5rem;
}

.status-banner {
  padding: 0.45rem 0.8rem;
  border-radius: 2px;
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
}

.status-banner.info {
  background: var(--surface-subtle);
  color: var(--muted);
}

.status-banner.success {
  background: var(--success-subtle);
  color: var(--success);
}

.status-banner.error {
  background: var(--danger-soft);
  color: var(--danger);
}

.drop-overlay {
  position: fixed;
  inset: 0;
  background: var(--accent-soft);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.drop-overlay.active {
  display: flex;
}

.drop-overlay__content {
  background: var(--surface);
  color: var(--fg);
  padding: 1.25rem 1.75rem;
  border-radius: 2px;
  text-align: center;
  font-size: 0.95rem;
  box-shadow: none;
  border: 1px solid var(--border);
}
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--overlay-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 3000;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 18px 42px var(--overlay-shadow);
  width: min(360px, 100%);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal h3 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
}

.modal__form {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.modal__form label {
  font-weight: 600;
  font-size: 0.9rem;
}

.modal__error {
  margin: -0.45rem 0 0;
  font-size: 0.85rem;
  color: var(--danger);
}

.modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}

@media (max-width: 1080px) {
  .app-main {
    grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
    grid-template-rows: auto auto;
  }
  .detail-panel {
    grid-column: 1 / -1;
    padding: 1.25rem;
  }
}

@media (max-width: 768px) {
  .app-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .app-main {
    grid-template-columns: 1fr;
  }
  .sidebar,
  .documents-panel,
  .detail-panel,
  .tags-panel,
  .correspondents-panel {
    min-height: auto;
    padding: 1.25rem;
  }
}
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 2rem;
}

.login-card {
  width: min(340px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 1.75rem;
  box-shadow: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.login-card h1 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 600;
}

.login-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.login-card form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.login-card label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
}

.login-card .status-banner {
  margin-bottom: 0;
}
.column-toolbar .filter-bar {
  margin-bottom: 0;
}
.doc-list__name {
  width: 100%;
}

.doc-list__name-content {
  display: inline-flex;
  align-items: center;
  gap: 0.22rem;
  max-width: 100%;
}

.doc-list__name-content span {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.doc-list__icon-button {
  opacity: 0;
  pointer-events: none;
  padding: 0.14rem;
  margin: 0;
  transition: opacity 0.12s ease;
}

.doc-list__name-content:hover .doc-list__icon-button, .doc-list__name-content:focus-within .doc-list__icon-button {
  opacity: 1;
  pointer-events: auto;
}

.doc-list__icon {
  width: 0.9rem;
  height: 0.9rem;
}