/* Shared cross-page UI patterns */

.hidden {
  display: none !important;
}

/* Toast */
.toast-msg {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: #333;
  color: #fff;
  font-size: 14px;
  padding: 10px 22px;
  border-radius: 999px;
  z-index: 4000;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  white-space: nowrap;
}

.toast-msg.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Grading controls */
.mode-switch {
  border: 1px solid var(--brand-primary);
  border-radius: 6px;
  overflow: hidden;
  display: inline-flex;
}

.mode-btn {
  border: none;
  background: #fff;
  color: var(--brand-primary);
  font-size: 11px;
  padding: 4px 8px;
  cursor: pointer;
}

.mode-btn + .mode-btn {
  border-left: 1px solid var(--brand-primary);
}

.mode-btn.active {
  background: var(--brand-primary);
  color: #fff;
}

.judge-panel,
.score-panel {
  display: none;
}

.judge-panel.show,
.score-panel.show {
  display: block;
}

.judge-group {
  display: flex;
  gap: 6px;
}

.judge-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  background: #fff;
  color: #6b7280;
  cursor: pointer;
}

.score-stepper {
  border: 1px solid #d1d5db;
  border-radius: 8px;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  background: #fff;
}

.score-stepper.source-ai {
  border-color: #93c5fd;
}

.score-step-btn {
  width: 28px;
  height: 30px;
  border: none;
  background: #f8fafc;
  color: #4b5563;
  cursor: pointer;
}

.score-input {
  width: 48px;
  height: 30px;
  border: none;
  text-align: center;
  font-size: 13px;
  outline: none;
}

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

/* Tree nav */
.tree-panel {
  width: 280px;
  background: var(--bg-card);
  border-right: 1px solid var(--divider);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: width 0.3s, padding 0.3s, opacity 0.3s;
}

.tree-panel.hidden {
  width: 0;
  padding: 0;
  overflow: hidden;
  opacity: 0;
  border-right: none;
}

.tree-tabs {
  display: flex;
  gap: 0;
  padding: 16px 12px 12px;
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}

.tree-tab {
  flex: 1;
  text-align: center;
  padding: 6px 0;
  font-size: var(--font-sm);
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tree-tab.active {
  color: var(--brand-primary);
  border-bottom-color: var(--brand-primary);
  font-weight: var(--fw-semibold);
}

.tree-node {
  padding: 8px 16px 8px 24px;
  font-size: var(--font-base);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tree-node:hover {
  background: #f8f9fc;
}

.tree-node.active {
  background: var(--brand-primary-light);
  color: var(--brand-primary);
  font-weight: var(--fw-medium);
}

.tree-node .arrow {
  font-size: 10px;
  color: var(--text-muted);
}

.tree-node.level-2 {
  padding-left: 40px;
}

.tree-node.level-3 {
  padding-left: 56px;
}

/* Filter chips */
.filter-chip,
.paper-filter-chip {
  padding: 6px 18px;
  font-size: var(--font-sm);
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 4px;
}

.filter-chip:hover,
.paper-filter-chip:hover {
  background: #f5f5f5;
}

.filter-chip.active,
.paper-filter-chip.active {
  background: var(--brand-primary-light);
  color: var(--brand-primary);
  font-weight: var(--fw-semibold);
  border: 1px solid var(--brand-primary);
}

/* Confirm modal */
.confirm-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1100;
  display: none;
  align-items: center;
  justify-content: center;
}

.confirm-modal-overlay.show {
  display: flex;
}

.confirm-modal {
  background: #fff;
  width: 400px;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  padding: 24px;
  text-align: center;
}