/* Compare PDF workspace — dual-pane viewer + change report */

.compare-shell {
  --cmp-sidebar: 320px;
  --cmp-toolbar-h: 48px;
  --cmp-add: #16a34a;
  --cmp-add-bg: #dcfce7;
  --cmp-del: #dc2626;
  --cmp-del-bg: #fee2e2;
  --cmp-hl: rgba(251, 113, 133, 0.45);
  --cmp-pane-bg: #e8eaed;
  --cmp-side-bg: #fff;
  min-height: calc(100vh - 72px);
  display: flex;
  flex-direction: column;
  background: var(--cmp-pane-bg);
  margin: 0 calc(50% - 50vw);
  width: 100vw;
  max-width: 100vw;
}

.compare-upload {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--sp-10) var(--sp-6);
}

.compare-upload-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
  align-items: start;
}

.compare-upload-grid .compare-upload-col h3 {
  margin-bottom: var(--sp-2);
}

.compare-upload-actions {
  grid-column: 1 / -1;
}

.compare-upload-slot {
  position: relative;
}

.compare-upload-slot__file {
  display: none;
  position: absolute;
  inset: 0;
  z-index: 2;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--sp-2);
  padding: var(--sp-6);
  text-align: center;
  pointer-events: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary, #111827);
  word-break: break-word;
  line-height: 1.4;
}

.compare-upload-slot__file::before {
  content: '';
  width: 40px;
  height: 40px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23dc2626' stroke-width='2'%3E%3Cpath d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'/%3E%3Cpolyline points='14 2 14 8 20 8'/%3E%3C/svg%3E") center / 28px no-repeat;
}

.compare-upload-slot.is-filled .upload-zone__icon,
.compare-upload-slot.is-filled .upload-zone__title,
.compare-upload-slot.is-filled .upload-zone__sub,
.compare-upload-slot.is-filled .upload-zone__privacy,
.compare-upload-slot.is-filled .upload-zone__time,
.compare-upload-slot.is-filled .upload-zone .badge,
.compare-upload-slot.is-filled .upload-sources {
  visibility: hidden;
}

.compare-upload-slot.is-filled .compare-upload-slot__file {
  display: flex;
}

@media (max-width: 768px) {
  .compare-upload-grid {
    grid-template-columns: 1fr;
  }
}

.compare-workspace {
  display: none;
  flex: 1;
  flex-direction: column;
  min-height: calc(100vh - 72px);
}

.compare-workspace.is-open {
  display: flex;
}

.compare-toolbar {
  height: var(--cmp-toolbar-h);
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-4);
  gap: var(--sp-3);
  flex-shrink: 0;
}

.compare-toolbar__left,
.compare-toolbar__right {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.compare-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 12px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #fff;
  color: #374151;
  font-size: 13px;
  cursor: pointer;
}

.compare-tool-btn.is-active,
.compare-tool-btn:hover {
  border-color: #93c5fd;
  background: #eff6ff;
  color: #1d4ed8;
}

.compare-tool-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.compare-body {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr var(--cmp-sidebar);
  min-height: 0;
}

.compare-panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: 0;
  position: relative;
}

.compare-pane {
  position: relative;
  min-width: 0;
  min-height: 0;
  background: var(--cmp-pane-bg);
  border-right: 1px solid #d1d5db;
  display: flex;
  flex-direction: column;
}

.compare-pane:last-child {
  border-right: none;
}

.compare-pane__scroll {
  flex: 1;
  overflow: auto;
  padding: 16px;
  scroll-behavior: auto;
}

.compare-pane__pages {
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: max-content;
  max-width: 100%;
}

.compare-page {
  position: relative;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
}

.compare-page canvas {
  display: block;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

.compare-page__hl {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* Full-height compare workspace — sidebar scrolls internally */
body.compare-active {
  overflow: hidden;
}

body.compare-active .footer {
  display: none;
}

body.compare-active .compare-shell {
  position: inherit;
  inset: 0;
  z-index: 200;
  min-height: 0;
  height: 100vh;
  margin: 0;
  width: 100vw;
  max-width: 100vw;
}

body.compare-active .compare-workspace.is-open {
  height: 100%;
  min-height: 0;
}

body.compare-active .compare-body {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.compare-page__hl mark {
  position: absolute;
  background: var(--cmp-hl);
  border-radius: 2px;
  mix-blend-mode: multiply;
}

.compare-page__hl mark.insert {
  background: rgba(34, 197, 94, 0.4);
}

.compare-page__hl mark.delete {
  background: rgba(239, 68, 68, 0.4);
}

.compare-pane__bar {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: rgba(40, 44, 52, 0.92);
  color: #f3f4f6;
  border-radius: 10px;
  font-size: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  max-width: calc(100% - 24px);
  white-space: nowrap;
}

.compare-pane__bar button {
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.compare-pane__bar button:hover {
  background: rgba(255, 255, 255, 0.22);
}

.compare-pane__name {
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

.compare-pane__close {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 6;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  color: #6b7280;
  font-size: 16px;
  line-height: 1;
}

.compare-minimap {
  position: absolute;
  top: 48px;
  right: 8px;
  bottom: 64px;
  width: 6px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.06);
  z-index: 4;
  pointer-events: none;
}

.compare-minimap__tick {
  position: absolute;
  left: 0;
  right: 0;
  height: 8px;
  border-radius: 2px;
  background: #ef4444;
  opacity: 0.85;
}

.compare-sidebar {
  background: var(--cmp-side-bg);
  border-left: 1px solid #e5e7eb;
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  overflow: hidden;
}

.compare-sidebar__head,
.compare-modes,
.compare-info,
.compare-search {
  flex-shrink: 0;
}

.compare-sidebar__foot {
  flex-shrink: 0;
  padding: 12px 16px 16px;
  border-top: 1px solid #f3f4f6;
}

.compare-sidebar__head {
  padding: 16px 16px 12px;
  text-align: center;
  font-weight: 700;
  font-size: 16px;
  border-bottom: 1px solid #f3f4f6;
}

.compare-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 12px 16px;
}

.compare-mode {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 8px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  font-size: 12px;
  color: #4b5563;
}

.compare-mode.is-active {
  border-color: #22c55e;
  box-shadow: 0 0 0 1px #22c55e;
  color: #166534;
}

.compare-mode__check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid #d1d5db;
  display: grid;
  place-items: center;
}

.compare-mode.is-active .compare-mode__check {
  border-color: #22c55e;
  background: #22c55e;
  color: #fff;
}

.compare-info {
  margin: 0 16px 12px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #eff6ff;
  color: #1e40af;
  font-size: 13px;
  line-height: 1.4;
}

.compare-search {
  margin: 0 16px 12px;
}

.compare-search input {
  width: 100%;
  height: 40px;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 0 12px;
  font-size: 14px;
}

.compare-report-panel {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  margin: 0 16px 8px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #fafafa;
  overflow: hidden;
}

.compare-report-panel__head {
  padding: 10px 12px;
  border-bottom: 1px solid #e5e7eb;
  background: #fff;
  flex-shrink: 0;
}

#changeReportScroll.compare-report,
.compare-report {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 12px 12px;
  overscroll-behavior: contain;
}

.compare-report::-webkit-scrollbar {
  width: 8px;
}

.compare-report::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

.compare-report__title {
  font-size: 13px;
  font-weight: 700;
  color: #111827;
  margin: 0;
}

.compare-report__page {
  font-size: 12px;
  font-weight: 600;
  color: #6b7280;
  margin: 12px 0 8px;
}

.compare-report__group {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 6px;
}

.compare-report__group.add {
  color: var(--cmp-add);
}

.compare-report__group.del {
  color: var(--cmp-del);
}

.compare-change {
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  font-size: 12px;
  line-height: 1.45;
  cursor: pointer;
  max-height: 120px;
  overflow: hidden;
  position: relative;
}

.compare-change::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 24px;
  pointer-events: none;
}

.compare-change.add::after {
  background: linear-gradient(transparent, var(--cmp-add-bg));
}

.compare-change.del::after {
  background: linear-gradient(transparent, var(--cmp-del-bg));
}

.compare-change__text {
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.compare-change.add {
  background: var(--cmp-add-bg);
  color: #14532d;
}

.compare-change.del {
  background: var(--cmp-del-bg);
  color: #7f1d1d;
}

.compare-change__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  font-weight: 700;
}

.compare-change__badge {
  font-size: 11px;
}

.compare-sidebar__foot {
  flex-shrink: 0;
  padding: 12px 16px 16px;
  border-top: 1px solid #f3f4f6;
}

.compare-download {
  width: 100%;
  height: 44px;
  border: 0;
  border-radius: 10px;
  background: #e11d48;
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.compare-download:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.compare-download:not(:disabled):hover {
  background: #be123c;
}

.compare-status-line {
  font-size: 12px;
  color: #6b7280;
  text-align: center;
  margin-bottom: 8px;
  min-height: 16px;
}

@media (max-width: 960px) {
  .compare-body {
    grid-template-columns: 1fr;
    grid-template-rows: 55vh auto;
  }

  .compare-sidebar {
    border-left: 0;
    border-top: 1px solid #e5e7eb;
  }

  .compare-panes {
    grid-template-columns: 1fr;
  }
}