/* ==========================================================================
   Nexus Terminal — SFTP File Browser
   Right-side panel for browsing remote files alongside the terminal.
   ========================================================================== */

/* -----------------------------------------------------------------------
   Panel wrapper — overlays the terminal from the right side
   ----------------------------------------------------------------------- */
.sftp-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 300px;
  min-width: 220px;
  max-width: 50vw;
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  overflow: hidden;
  z-index: var(--z-dropdown, 50);
  box-shadow: -4px 0 16px rgba(0, 0, 0, 0.25);
}

/* Resize handle — positioned at the left edge of the SFTP panel */
.sftp-resize-handle {
  position: absolute;
  top: 0;
  left: -3px;
  bottom: 0;
  width: 6px;
  cursor: col-resize;
  background: transparent;
  z-index: var(--z-dropdown, 50);
  transition: background var(--transition-fast);
}

.sftp-resize-handle:hover,
.sftp-resize-handle.is-dragging {
  background: var(--accent);
}

/* -----------------------------------------------------------------------
   Toolbar (top bar with path breadcrumb + action buttons)
   ----------------------------------------------------------------------- */
.sftp-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  flex-shrink: 0;
  min-height: 34px;
}

.sftp-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.sftp-toolbar-btn {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  color: var(--text-tertiary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-sm);
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
  flex-shrink: 0;
  padding: 0;
}

.sftp-toolbar-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sftp-toolbar-btn.is-accent:hover {
  color: var(--accent);
}

.sftp-toolbar-btn.is-close:hover {
  color: var(--error);
}

/* -----------------------------------------------------------------------
   Breadcrumb path
   ----------------------------------------------------------------------- */
.sftp-breadcrumb {
  flex: 1;
  display: flex;
  align-items: center;
  min-width: 0;
  overflow: hidden;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  gap: 1px;
}

.sftp-breadcrumb-segment {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: var(--text-xs);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sftp-breadcrumb-segment:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sftp-breadcrumb-segment:last-child {
  color: var(--text-primary);
  font-weight: var(--weight-medium);
}

.sftp-breadcrumb-sep {
  color: var(--text-disabled);
  font-size: 10px;
  flex-shrink: 0;
  user-select: none;
}

/* -----------------------------------------------------------------------
   File list
   ----------------------------------------------------------------------- */
.sftp-file-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Scrollbar styling */
.sftp-file-list::-webkit-scrollbar {
  width: 6px;
}
.sftp-file-list::-webkit-scrollbar-track {
  background: transparent;
}
.sftp-file-list::-webkit-scrollbar-thumb {
  background: var(--border-strong, var(--bg-active));
  border-radius: 3px;
}
.sftp-file-list::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* -----------------------------------------------------------------------
   File row
   ----------------------------------------------------------------------- */
.sftp-file-row {
  display: grid;
  grid-template-columns: 20px 1fr auto;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  cursor: pointer;
  transition: background var(--transition-fast);
  user-select: none;
  min-height: 30px;
}

.sftp-file-row:hover {
  background: var(--bg-hover);
}

.sftp-file-row.is-selected {
  background: var(--accent-muted);
}

.sftp-file-row.is-selected:hover {
  background: var(--accent-strong);
}

.sftp-file-row.is-readonly .sftp-file-meta {
  color: var(--warning);
  font-weight: var(--weight-semibold);
}

.sftp-file-row.is-unreadable {
  opacity: 0.5;
  cursor: not-allowed;
}

.sftp-file-row.is-unreadable .sftp-file-name {
  text-decoration: line-through;
}

.sftp-file-icon {
  font-size: 13px;
  text-align: center;
  line-height: 1;
  flex-shrink: 0;
  color: var(--text-tertiary);
}

.sftp-file-icon.is-dir {
  color: var(--accent);
}

.sftp-file-name {
  font-size: var(--text-sm);
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.sftp-file-meta {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  white-space: nowrap;
  text-align: right;
}

/* -----------------------------------------------------------------------
   Parent directory row (..)
   ----------------------------------------------------------------------- */
.sftp-file-row.is-parent .sftp-file-name {
  color: var(--text-secondary);
  font-style: italic;
}

/* -----------------------------------------------------------------------
   Context actions bar (shown below file list when a file is selected)
   ----------------------------------------------------------------------- */
.sftp-context-bar {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  flex-shrink: 0;
  min-height: 32px;
}

.sftp-context-bar .sftp-ctx-label {
  flex: 1;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.sftp-context-bar .sftp-ctx-btn {
  height: 24px;
  padding: 0 var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: transparent;
  color: var(--text-secondary);
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
  white-space: nowrap;
}

.sftp-context-bar .sftp-ctx-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sftp-context-bar .sftp-ctx-btn.is-danger:hover {
  background: rgba(239, 83, 80, 0.12);
  color: var(--error);
}

.sftp-context-bar .sftp-ctx-btn.is-accent:hover {
  color: var(--accent);
}

/* -----------------------------------------------------------------------
   States: loading, empty, error
   ----------------------------------------------------------------------- */
.sftp-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
  text-align: center;
  gap: var(--space-2);
}

.sftp-state-icon {
  font-size: 28px;
  color: var(--text-disabled);
}

.sftp-state-msg {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  line-height: var(--leading-relaxed);
  max-width: 200px;
}

.sftp-state-retry {
  margin-top: var(--space-1);
}

/* Loading spinner (pure CSS) */
.sftp-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: sftp-spin 0.6s linear infinite;
}

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

/* -----------------------------------------------------------------------
   Inline input (for rename / mkdir)
   ----------------------------------------------------------------------- */
.sftp-inline-input {
  width: 100%;
  height: 26px;
  padding: 0 var(--space-2);
  font-size: var(--text-sm);
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  outline: none;
  box-shadow: 0 0 0 2px var(--accent-muted);
}

/* Picker-specific input in the toolbar */
.sftp-picker-filter {
  width: 160px;
  height: 26px;
  padding: 0 var(--space-2);
  font-size: var(--text-xs);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
}

.sftp-picker-filter:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-muted);
  outline: none;
}

.sftp-picker-status {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-right: var(--space-2);
}

.sftp-picker-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 18px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 10px;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  color: var(--text-tertiary);
}

.sftp-picker-badge.is-readonly {
  border-color: rgba(255, 167, 38, 0.35);
  color: var(--warning);
  background: rgba(255, 167, 38, 0.12);
}

.sftp-picker-badge.is-noread {
  border-color: rgba(239, 83, 80, 0.35);
  color: var(--error);
  background: rgba(239, 83, 80, 0.12);
}

.sftp-picker-legend {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 10px;
  color: var(--text-tertiary);
}

/* -----------------------------------------------------------------------
   Transfer progress queue
   ----------------------------------------------------------------------- */
.sftp-transfer-queue {
  flex-shrink: 0;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  max-height: 140px;
  overflow-y: auto;
}

.sftp-transfer-header {
  font-size: 10px;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  padding: var(--space-1) var(--space-2) 0;
}

.sftp-transfer-row {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px var(--space-2);
}

.sftp-transfer-icon {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--accent);
  flex-shrink: 0;
  width: 16px;
  text-align: center;
}

.sftp-transfer-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sftp-transfer-name {
  font-size: var(--text-xs);
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sftp-transfer-progress {
  height: 3px;
  background: var(--border-subtle);
  border-radius: 2px;
  overflow: hidden;
}

.sftp-transfer-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.15s ease-out;
}

.sftp-transfer-meta {
  font-size: 10px;
  color: var(--text-tertiary);
}