/* ARC Assistant Panel, AI Change Preview, Expert Review, Reusable Drawer & Modals */

/* =========================================================
   RIGHT PANEL: ARC ASSISTANT
========================================================= */
.arc-right-panel {
  width: var(--right-panel-width);
  background-color: var(--bg-surface-1);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  user-select: none;
}

.assistant-header {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-surface-2);
}

.assistant-brand-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.assistant-selection-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 12px;
  background: var(--accent-surface);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: var(--accent-text);
  font-size: 11px;
  font-weight: 500;
  width: fit-content;
}

.assistant-body {
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  flex: 1;
}

/* Quick Actions Grid */
.modifier-actions-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.modifier-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.btn-modifier {
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 500;
  text-align: left;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface-2);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.12s ease;
}

.btn-modifier:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-focus);
  transform: translateY(-1px);
}

.btn-modifier:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* Natural Language Instruction Form */
.instruction-box-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.instruction-input-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.instruction-textarea {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  color: var(--text-primary);
  font-size: 12px;
  min-height: 70px;
  resize: vertical;
  line-height: 1.45;
}
.instruction-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px var(--accent-surface);
}

/* =========================================================
   AI CHANGE PREVIEW DECK (Current vs Proposed)
========================================================= */
.preview-deck {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-lg);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-md), var(--shadow-glow);
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.preview-deck-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 8px;
}

.preview-label-tag {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-text);
}

.preview-diff-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 280px;
  overflow-y: auto;
  font-size: 12px;
  line-height: 1.4;
  background: var(--bg-surface-1);
  padding: 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.preview-comparison-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.preview-badge-current {
  color: #f87171;
  font-weight: 600;
  font-size: 10px;
  text-transform: uppercase;
}

.preview-badge-proposed {
  color: #34d399;
  font-weight: 600;
  font-size: 10px;
  text-transform: uppercase;
}

.preview-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 4px;
}

/* =========================================================
   EXPERT REVIEW FINDINGS PANEL
========================================================= */
.expert-review-card {
  background: var(--bg-surface-2);
  border: 1px solid #4338ca;
  border-radius: var(--radius-lg);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-md);
  animation: fadeIn 0.2s ease-out;
}

.expert-review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 8px;
  font-size: 13px;
  color: var(--accent-text);
}

.expert-review-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 380px;
  overflow-y: auto;
  font-size: 12px;
}

.expert-stat-box {
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.expert-stat-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-text);
}

.finding-item {
  background: var(--bg-surface-1);
  border-left: 3px solid var(--accent-primary);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.finding-action-btn {
  align-self: flex-end;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background: var(--accent-surface);
  color: var(--accent-text);
  border: 1px solid rgba(99, 102, 241, 0.3);
  cursor: pointer;
}
.finding-action-btn:hover {
  background: var(--accent-primary);
  color: #fff;
}

/* =========================================================
   SIDE DRAWERS (TEACHING FRAMEWORK & REUSABLE LIBRARY)
========================================================= */
.side-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 10, 0.7);
  backdrop-filter: blur(3px);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.side-drawer-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.side-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 540px;
  max-width: 90vw;
  background: var(--bg-surface-1);
  border-left: 1px solid var(--border-default);
  box-shadow: var(--shadow-lg);
  z-index: 210;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.side-drawer-backdrop.open .side-drawer {
  transform: translateX(0);
}

.drawer-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface-2);
}

.drawer-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-surface-1);
  padding: 0 16px;
  gap: 4px;
}

.drawer-tab-btn {
  padding: 10px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.12s ease;
}

.drawer-tab-btn:hover {
  color: var(--text-primary);
}

.drawer-tab-btn.active {
  color: var(--accent-text);
  border-bottom-color: var(--accent-primary);
  font-weight: 600;
}

.drawer-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Master List Item */
.master-list-item {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  transition: border-color 0.15s ease;
}
.master-list-item:hover {
  border-color: var(--border-focus);
}

.master-item-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.master-item-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary);
}

.master-item-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

.master-item-guidance {
  font-size: 11px;
  color: var(--accent-text);
  background: var(--accent-surface);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  margin-top: 4px;
}

/* Reusable Material Card in Drawer */
.reusable-card {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.15s ease;
}
.reusable-card:hover {
  border-color: var(--border-focus);
}

.reusable-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.reusable-card-title {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary);
}

.reusable-tags-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.reusable-card-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 8px;
  margin-top: 4px;
}