:root {
  --bottom-reserve: 0px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-elevated: 0 10px 28px rgba(12, 20, 32, 0.18);
}

:root[data-theme="dark"] {
  --color-page-bg: #161c25;
  --color-surface: #1d2531;
  --color-surface-elevated: #222c39;
  --color-border: #324052;
  --color-border-strong: #55739f;
  --color-text-primary: #e7edf6;
  --color-text-muted: #9aa9bd;
  --color-accent: #6aa5ff;
  --color-accent-contrast: #07192f;
  --color-selection-bg: #233754;
  --color-selection-border: #5c8fda;
  --color-current-row-bg: #1f2d42;
  --color-current-row-border: #6a87b5;
  --color-active-pane-border: #78adff;
  --color-button-bg: #283444;
  --color-button-hover: #314258;
  --color-button-secondary-bg: #202935;
  --color-danger: #ff8e8e;
  --color-danger-bg: #462328;
  --color-overlay-bg: rgba(8, 12, 18, 0.62);
}

:root[data-theme="light"] {
  --color-page-bg: #eef3f9;
  --color-surface: #ffffff;
  --color-surface-elevated: #f8fbff;
  --color-border: #d6e0ec;
  --color-border-strong: #7ca0d1;
  --color-text-primary: #172233;
  --color-text-muted: #617086;
  --color-accent: #235ec7;
  --color-accent-contrast: #ffffff;
  --color-selection-bg: #e5eefc;
  --color-selection-border: #7b9fdb;
  --color-current-row-bg: #f1f6ff;
  --color-current-row-border: #a2bce8;
  --color-active-pane-border: #235ec7;
  --color-button-bg: #f6f9fd;
  --color-button-hover: #edf3fb;
  --color-button-secondary-bg: #f3f6fb;
  --color-danger: #b42323;
  --color-danger-bg: #fdecec;
  --color-overlay-bg: rgba(18, 28, 40, 0.30);
}

:root {
  --bg: var(--color-page-bg);
  --panel: var(--color-surface);
  --border: var(--color-border);
  --text: var(--color-text-primary);
  --muted: var(--color-text-muted);
  --error: var(--color-danger);
  --accent: var(--color-accent);
  --active-border: var(--color-active-pane-border);
  --active-bg: var(--color-surface);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: var(--color-page-bg);
  color: var(--color-text-primary);
  overflow: hidden;
}

#app-shell {
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

#title-zone {
  padding: 7px 10px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-elevated);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#title-zone-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

h1, h2, h3 {
  margin: 0;
}

h1 {
  font-size: 16px;
  line-height: 1.2;
}

.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 6px 10px;
  min-height: 0;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px;
}

.pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
}

.pane.active-pane {
  border-color: var(--color-active-pane-border);
  box-shadow: 0 0 0 1px var(--color-active-pane-border) inset;
  background: var(--color-surface);
}

.pane-header {
  flex: 0 0 auto;
  margin-bottom: 4px;
}

.pane-content {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  border-top: 1px solid var(--color-border);
  padding-top: 4px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin-bottom: 4px;
}

.compact-toolbar {
  margin-bottom: 2px;
}

.pane-topbar {
  justify-content: space-between;
}

.pane-title {
  min-width: 42px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.checkbox {
  color: var(--color-text-muted);
  font-size: 13px;
}

input, button, textarea {
  font: inherit;
  font-size: 13px;
}

input, textarea {
  padding: 5px 7px;
  color: var(--color-text-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

button {
  padding: 4px 7px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-button-bg);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

button:hover {
  background: var(--color-button-hover);
  border-color: var(--color-accent);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#theme-toggle {
  width: 28px;
  min-width: 28px;
  height: 28px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--color-button-secondary-bg);
}

#theme-toggle-icon {
  font-size: 14px;
  line-height: 1;
}

.pathline {
  color: var(--color-text-muted);
  margin-bottom: 3px;
  font-size: 12px;
}

.compact-line {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 3px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.breadcrumbs button {
  padding: 1px 4px;
  font-size: 12px;
  background: transparent;
  color: var(--color-text-muted);
}

.breadcrumbs button:hover {
  color: var(--color-accent);
  background: var(--color-button-secondary-bg);
}

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

.list-grid-header {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) 88px 138px;
  gap: 6px;
  padding: 2px 0 4px 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2px;
  color: var(--color-text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.col-size,
.col-modified {
  text-align: right;
}

.list li {
  border-top: 1px solid var(--color-border);
  padding: 5px 0 4px 0;
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) 88px 138px;
  gap: 6px;
  align-items: center;
}

.list li.selectable {
  cursor: pointer;
}

.list li.is-selected {
  background: var(--color-selection-bg);
}

.list li.is-current-row {
  box-shadow: inset 0 0 0 1px var(--color-current-row-border);
}

.list li.is-current-row:not(.is-selected) {
  background: var(--color-current-row-bg);
}

.list li.is-current-row.is-selected {
  background: var(--color-selection-bg);
  box-shadow: inset 0 0 0 1px var(--color-current-row-border);
}

.select-marker {
  appearance: none;
  width: 10px;
  min-width: 10px;
  height: 10px;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  display: inline-block;
  margin: 0;
  cursor: pointer;
  background: var(--color-surface);
}

.list li.is-selected .select-marker,
.select-marker:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.entry-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.entry-name.entry-dir {
  font-weight: 600;
}

.dir-link {
  border: 0;
  background: transparent;
  padding: 0;
  color: var(--color-accent);
  text-decoration: underline;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dir-link:hover {
  background: transparent;
}

.entry-size,
.entry-modified {
  font-size: 12px;
  color: var(--color-text-muted);
  text-align: right;
  white-space: nowrap;
}

.error {
  color: var(--color-danger);
  min-height: 12px;
  margin-bottom: 2px;
  font-size: 12px;
}

#status {
  color: var(--color-text-muted);
  font-size: 12px;
  min-width: 0;
  text-align: right;
}

#footer-bar {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-elevated);
  padding: 4px 10px 3px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

#function-bar-meta {
  margin-bottom: 0;
  justify-content: center;
}

#function-bar {
  margin-bottom: 0;
  justify-content: center;
  gap: 5px;
  width: 100%;
  max-width: 760px;
}

#function-bar button {
  min-width: 72px;
  padding: 3px 8px;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  justify-content: center;
}

.shortcut-hint {
  color: var(--color-text-muted);
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.popup-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.popup-overlay.hidden {
  display: none;
}

.popup-card {
  width: min(420px, calc(100vw - 24px));
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px;
  box-shadow: var(--shadow-elevated);
}

.popup-meta {
  color: var(--color-text-muted);
  font-size: 12px;
  margin: 4px 0 8px 0;
}

.popup-label {
  font-size: 12px;
  color: var(--color-text-muted);
}

#wildcard-pattern-input,
#rename-move-input {
  width: 100%;
  margin-top: 4px;
  margin-bottom: 6px;
}

.popup-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.viewer-card {
  position: relative;
  width: min(960px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  display: flex;
  flex-direction: column;
}

.viewer-close {
  position: absolute;
  top: 10px;
  right: 10px;
  min-width: 32px;
  padding: 2px 8px;
}

.viewer-content,
.editor-content {
  margin: 6px 0 0 0;
  padding: 10px;
  overflow: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font: 12px/1.45 "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.viewer-content {
  min-height: 240px;
  max-height: calc(100vh - 180px);
  white-space: pre-wrap;
  word-break: break-word;
  user-select: text;
}

.editor-content {
  margin-bottom: 8px;
  min-height: 280px;
  max-height: calc(100vh - 220px);
  width: 100%;
  resize: vertical;
  white-space: pre;
}

@media (max-width: 1200px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }

  .list-grid-header,
  .list li {
    grid-template-columns: 14px minmax(0, 1fr) 70px 112px;
    gap: 4px;
  }
}