/**
 * Top toolbar styles. Template selector, page tabs, viewport controls,
 * undo/redo, save/export buttons.
 */

.pb-toolbar {
  height: var(--pb-toolbar-height);
  min-height: var(--pb-toolbar-height);
  display: flex;
  align-items: center;
  padding: 0 var(--pb-space-5);
  gap: var(--pb-space-4);
  background: var(--pb-surface);
  border-bottom: 1px solid var(--pb-border);
  box-shadow: var(--pb-shadow-panel);
}

/* Left group: template selector */
.pb-toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--pb-space-4);
}

.pb-toolbar-template-btn {
  display: flex;
  align-items: center;
  gap: var(--pb-space-3);
  padding: var(--pb-space-3) var(--pb-space-5);
  border: 1px solid var(--pb-border);
  border-radius: var(--pb-radius);
  font-size: var(--pb-font-base);
  color: var(--pb-text);
  transition: border-color var(--pb-transition), background var(--pb-transition);
}

.pb-toolbar-template-btn:hover {
  border-color: var(--pb-accent-subtle);
  background: var(--pb-surface-hover);
}

/* Center group: page tabs */
.pb-toolbar-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--pb-space-2);
  overflow-x: auto;
  scrollbar-width: none;
}

.pb-toolbar-center::-webkit-scrollbar {
  display: none;
}

.pb-page-tab {
  padding: var(--pb-space-3) var(--pb-space-5);
  border-radius: var(--pb-radius);
  font-size: var(--pb-font-base);
  color: var(--pb-text-dim);
  white-space: nowrap;
  transition: background var(--pb-transition), color var(--pb-transition);
}

.pb-page-tab:hover {
  background: var(--pb-surface-hover);
  color: var(--pb-text);
}

.pb-page-tab.pb-active {
  background: var(--pb-accent);
  color: var(--pb-text-bright);
}

.pb-page-tab-add {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--pb-radius);
  color: var(--pb-text-dim);
  font-size: var(--pb-font-xl);
  transition: background var(--pb-transition), color var(--pb-transition);
}

.pb-page-tab-add:hover {
  background: var(--pb-surface-hover);
  color: var(--pb-text);
}

/* Right group: viewport + undo/redo + save/export */
.pb-toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--pb-space-2);
}

.pb-toolbar-divider {
  width: 1px;
  height: 24px;
  background: var(--pb-border);
  margin: 0 var(--pb-space-2);
}

/* Viewport control buttons */
.pb-viewport-group {
  display: flex;
  align-items: center;
  gap: var(--pb-space-1);
}

/* Undo/redo group */
.pb-history-group {
  display: flex;
  align-items: center;
  gap: var(--pb-space-1);
  width: 68px;             /* two 32px .pb-btn-icon + 4px gap */
  overflow: hidden;
  transition: opacity var(--pb-transition), width var(--pb-transition);
}

.pb-history-group.pb-history-hidden {
  opacity: 0;
  width: 0;
  pointer-events: none;
}

.pb-history-divider-hidden {
  display: none;
}

/* Auto-save indicator */
.pb-autosave-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--pb-space-2);
  font-size: var(--pb-font-xs);
  color: var(--pb-text-dim);
  opacity: 0;
  transition: opacity var(--pb-transition-slow), color var(--pb-transition-slow);
  pointer-events: none;
  white-space: nowrap;
}

.pb-autosave-indicator.pb-autosave-show {
  opacity: 1;
}

.pb-autosave-icon {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  display: inline-block;
}

.pb-autosave-saving .pb-autosave-icon {
  border: 2px solid var(--pb-border);
  border-top-color: var(--pb-accent);
  animation: pb-spin 0.8s linear infinite;
}

.pb-autosave-saved {
  color: var(--pb-success);
}

.pb-autosave-saved .pb-autosave-icon {
  width: 12px;
  height: 12px;
  border-radius: 0;
  position: relative;
}

.pb-autosave-saved .pb-autosave-icon::before {
  content: '✓';
  position: absolute;
  inset: 0;
  font-size: 10px;
  line-height: 12px;
  color: currentColor;
}

.pb-autosave-error {
  color: var(--pb-danger);
}

.pb-autosave-error .pb-autosave-icon {
  width: 12px;
  height: 12px;
  border-radius: 0;
  position: relative;
}

.pb-autosave-error .pb-autosave-icon::before {
  content: '!';
  position: absolute;
  inset: 0;
  font-size: 11px;
  line-height: 12px;
  text-align: center;
  color: currentColor;
}

/* Keyboard shortcuts hint button */
.pb-shortcut-hint-btn {
  opacity: 0.5;
  transition: opacity var(--pb-transition);
}
.pb-shortcut-hint-btn:hover { opacity: 1; }

.pb-session-timer {
  font-size: var(--pb-font-xs);
  color: var(--pb-text-dim);
  padding: 0 var(--pb-space-3);
  white-space: nowrap;
  user-select: none;
  min-width: 0;
}

/* Project name (editable) */
.pb-project-name {
  font-size: var(--pb-font-md);
  font-weight: 600;
  color: var(--pb-text-bright);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--pb-radius);
  padding: var(--pb-space-2) var(--pb-space-4);
  min-width: 80px;
  max-width: 200px;
  transition: border-color var(--pb-transition);
}

.pb-project-name:hover {
  border-color: var(--pb-border);
}

.pb-project-name:focus {
  border-color: var(--pb-accent);
}

/* Inline rename input inside page tab */
.pb-page-tab-rename {
  font-size: var(--pb-font-base);
  color: var(--pb-text-bright);
  background: var(--pb-bg);
  border: 1px solid var(--pb-accent);
  border-radius: var(--pb-radius);
  padding: var(--pb-space-1) var(--pb-space-3);
  width: 100px;
}

/* Page tab context menu */
.pb-page-context-menu {
  position: fixed;
  z-index: var(--pb-z-context-menu);
  background: var(--pb-surface);
  border: 1px solid var(--pb-border);
  border-radius: var(--pb-radius);
  padding: var(--pb-space-2) 0;
  min-width: 140px;
  box-shadow: var(--pb-shadow-dropdown);
}

.pb-page-context-menu button {
  display: block;
  width: 100%;
  padding: var(--pb-space-3) var(--pb-space-5);
  text-align: left;
  font-size: var(--pb-font-base);
  color: var(--pb-text);
  background: none;
  border: none;
  cursor: pointer;
  transition: background var(--pb-transition), transform var(--pb-transition);
}

.pb-page-context-menu button:not(:disabled):hover {
  background: var(--pb-surface-hover);
}

.pb-page-context-menu button:not(:disabled):active {
  transform: scale(0.96);
}

.pb-page-context-menu button:disabled,
.pb-page-context-menu button[aria-disabled="true"] {
  color: var(--pb-text-dim);
}

.pb-page-context-menu button:focus-visible {
  outline: none;
  background: var(--pb-surface-hover);
  box-shadow: inset 0 0 0 1px var(--pb-accent);
}

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

.pb-page-context-menu .pb-context-danger:disabled {
  color: var(--pb-text-dim);
}

.pb-page-context-menu .pb-context-danger[aria-disabled="true"] {
  color: var(--pb-text-dim);
}

/* Save dropdown menu */
.pb-save-menu-wrap {
  position: relative;
}

.pb-save-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--pb-space-2);
  z-index: var(--pb-z-dropdown);
  background: var(--pb-surface);
  border: 1px solid var(--pb-border);
  border-radius: var(--pb-radius);
  padding: var(--pb-space-2) 0;
  min-width: 180px;
  box-shadow: var(--pb-shadow-dropdown);
}

.pb-page-context-menu,
.pb-save-menu {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-4px) scale(0.98);
  transform-origin: top right;
  transition:
    opacity var(--pb-transition),
    transform var(--pb-transition),
    visibility 0s linear 0.15s;
}

.pb-page-context-menu.pb-open,
.pb-save-menu.pb-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0) scale(1);
  transition-delay: 0s;
}

.pb-save-menu button {
  display: block;
  width: 100%;
  padding: var(--pb-space-3) var(--pb-space-5);
  text-align: left;
  font-size: var(--pb-font-base);
  color: var(--pb-text);
  background: none;
  border: none;
  cursor: pointer;
  transition: background var(--pb-transition);
}

.pb-save-menu button:not(:disabled):hover {
  background: var(--pb-surface-hover);
  color: var(--pb-text-bright);
}

.pb-menu-danger {
  color: var(--pb-danger) !important;
}

.pb-menu-danger:not(:disabled):hover {
  background: rgba(var(--pb-danger-rgb, 239, 68, 68), 0.1) !important;
  color: var(--pb-danger) !important;
}

.pb-save-menu button:focus-visible {
  outline: none;
  background: var(--pb-surface-hover);
  box-shadow: inset 0 0 0 1px var(--pb-accent);
}

/* Split button (export) — main action + dropdown arrow */
.pb-split-btn {
  display: inline-flex;
}

.pb-split-btn > .pb-btn:first-child {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.pb-split-arrow {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  border-left: 1px solid var(--pb-border);
  padding: 0 var(--pb-space-2);
  min-width: 0;
  font-size: 10px;
}

/* Forced-colors fallback — keyboard focus visible in high-contrast mode */
@media (forced-colors: active) {
  .pb-page-context-menu button:focus-visible,
  .pb-save-menu button:focus-visible {
    outline: 2px solid LinkText;
    outline-offset: -2px;
  }
}

.pb-save-menu-divider {
  height: 1px;
  background: var(--pb-border);
  margin: var(--pb-space-2) 0;
}