/* Image merge — docsmall-inspired layout */

.merge-page {
  max-width: 920px;
  margin: 0 auto;
  padding-bottom: 3rem;
}

.merge-hero {
  text-align: center;
  margin-bottom: 2rem;
}

.merge-hero h1 {
  font-size: 1.75rem;
  font-weight: 600;
  color: #1a1a1a;
  margin: 0 0 0.65rem;
}

.merge-hero p {
  font-size: 0.9375rem;
  color: #666;
  line-height: 1.65;
  margin: 0 auto;
  max-width: 36rem;
}

.merge-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  padding: 2.5rem 1.5rem;
  margin: 0 auto 2.5rem;
  background: linear-gradient(180deg, #45b07a 0%, #3a9d6c 100%);
  border: 2px dashed rgba(255, 255, 255, 0.85);
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: filter 0.15s ease, transform 0.15s ease;
}

.merge-dropzone:hover {
  filter: brightness(1.03);
}

.merge-dropzone.merge-dropzone--disabled {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
}

.merge-dropzone-input,
.merge-dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  font-size: 0;
  z-index: 2;
}

.merge-add-input,
.merge-add-link input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  font-size: 0;
}

.merge-dropzone-icon {
  font-size: 2.75rem;
  font-weight: 300;
  line-height: 1;
  margin-bottom: 0.35rem;
  opacity: 0.95;
}

.merge-dropzone-title {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.merge-dropzone-hint {
  font-size: 0.75rem;
  opacity: 0.88;
  text-align: center;
  max-width: 28rem;
  line-height: 1.5;
}

.merge-studio {
  /* border/padding from .it-studio on same element */
  margin-bottom: 0;
}

.merge-page .it-studio.merge-studio {
  margin-bottom: 1.5rem;
}

.merge-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid #eee;
  margin-bottom: 0.85rem;
}

.merge-toolbar-fields {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.65rem 1rem;
  flex: 1 1 auto;
  min-width: 0;
}

.merge-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.merge-field-label {
  font-size: 0.8125rem;
  color: #555;
  white-space: nowrap;
}

.merge-field .form-select,
.merge-field .form-control {
  font-size: 0.875rem;
  min-width: 5.5rem;
  border-color: #ddd;
  border-radius: 3px;
}

.merge-field .form-select-sm,
.merge-field .form-control-sm {
  height: 1.875rem;
  min-height: 1.875rem;
  padding: 0.15rem 0.5rem;
  line-height: 1.25;
}

.merge-field--gap .form-range {
  width: 120px;
  margin: 0.35rem 0 0;
}

.merge-field--narrow .form-control-sm {
  width: 3.5rem;
  min-width: 3.5rem;
  padding-left: 0.35rem;
  padding-right: 0.35rem;
  text-align: center;
}

.merge-field--narrow input[type="number"].form-control-sm {
  -moz-appearance: textfield;
  appearance: textfield;
}

.merge-field--narrow input[type="number"].form-control-sm::-webkit-inner-spin-button,
.merge-field--narrow input[type="number"].form-control-sm::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.merge-toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  flex-shrink: 0;
}

.merge-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s;
}

.merge-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.merge-btn-outline {
  background: #fff;
  border-color: #3a9d6c;
  color: #3a9d6c;
}

.merge-btn-outline:hover:not(:disabled) {
  background: #f3faf6;
}

.merge-btn-primary {
  background: #3a9d6c;
  border-color: #3a9d6c;
  color: #fff;
}

.merge-btn-primary:hover:not(:disabled) {
  background: #338f62;
  border-color: #338f62;
}

.merge-add-row {
  margin-bottom: 0.75rem;
}

.merge-add-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8125rem;
  color: #3a9d6c;
  cursor: pointer;
  position: relative;
  margin: 0;
  padding: 0.15rem 0;
}

.merge-add-link:hover {
  color: #2d7d55;
}

.merge-thumbs {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.35rem;
  margin-bottom: 0.75rem;
  scrollbar-width: thin;
}

.merge-thumb {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 72px;
  padding: 0.35rem;
  border: 1px solid #e8e8e8;
  border-radius: 4px;
  background: #fafafa;
}

.merge-thumb img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-radius: 2px;
  background: #fff;
}

.merge-thumb-index {
  font-size: 0.6875rem;
  color: #999;
  margin-top: 0.2rem;
}

.merge-thumb-actions {
  display: flex;
  gap: 0.15rem;
  margin-top: 0.25rem;
}

.merge-thumb-actions button {
  padding: 0 0.35rem;
  font-size: 0.75rem;
  line-height: 1.4;
  border: 1px solid #ddd;
  border-radius: 2px;
  background: #fff;
  color: #666;
  cursor: pointer;
}

.merge-thumb-actions button:hover:not(:disabled) {
  border-color: #3a9d6c;
  color: #3a9d6c;
}

.merge-thumb-actions button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.merge-more {
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
}

.merge-more summary {
  cursor: pointer;
  color: #3a9d6c;
  user-select: none;
  margin-bottom: 0.5rem;
}

.merge-more-body {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1.5rem;
  padding: 0.65rem 0.85rem;
  margin-top: 0.35rem;
  background: #f9faf9;
  border: 1px solid #e8ece9;
  border-radius: 4px;
}

.merge-more-row {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.merge-more-label {
  font-size: 0.8125rem;
  color: #555;
  white-space: nowrap;
}

.merge-more-color {
  width: 2rem;
  height: 1.875rem;
  padding: 0.125rem;
  border: 1px solid #ddd;
  border-radius: 3px;
  background: #fff;
  cursor: pointer;
  vertical-align: middle;
}

.merge-more-color:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.merge-more-body .form-select-sm {
  height: 1.875rem;
  min-height: 1.875rem;
  width: auto;
  min-width: 5rem;
  font-size: 0.875rem;
  border-color: #ddd;
  border-radius: 3px;
}

.merge-more-check {
  margin: 0;
}

.merge-page .form-check {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  white-space: nowrap;
  position: static;
}

.merge-page .form-check-input {
  position: static;
  float: none;
  margin: 0;
  flex-shrink: 0;
}

.merge-page .form-check-label {
  white-space: nowrap;
  font-size: 0.875rem;
}

.merge-preview-panel {
  margin-top: 0.25rem;
  border-top: 1px solid #eee;
  padding-top: 0.75rem;
}

.merge-preview-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0 0 0.65rem;
  margin-bottom: 0;
  font-size: 0.8125rem;
  color: #888;
  border-top: none;
}

.merge-preview-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.85rem;
  min-width: 0;
}

.merge-preview-busy {
  color: #3a9d6c;
}

.merge-preview-bar .merge-zoom-group {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  flex-shrink: 0;
}

.merge-zoom-group button {
  min-width: 1.75rem;
  padding: 0.15rem 0.4rem;
  font-size: 0.8125rem;
  border: 1px solid #ddd;
  border-radius: 2px;
  background: #fff;
  color: #555;
  cursor: pointer;
}

.merge-zoom-group button:hover:not(:disabled) {
  border-color: #3a9d6c;
  color: #3a9d6c;
}

.merge-zoom-group button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.merge-zoom-label {
  min-width: 2.75rem;
  text-align: center;
  color: #666;
}

.merge-viewport {
  position: relative;
  min-height: 360px;
  background: repeating-conic-gradient(#ebebeb 0% 25%, #fff 0% 50%) 50% / 14px 14px;
  border: 1px solid #e8e8e8;
  border-radius: 2px;
  overflow: hidden;
  touch-action: none;
  cursor: grab;
}

.merge-viewport.is-panning {
  cursor: grabbing;
}

.merge-viewport .tool-merge-stage {
  position: absolute;
  left: 0;
  top: 0;
  transform-origin: 0 0;
}

.merge-viewport canvas {
  display: block;
  max-width: none;
}

.merge-viewport-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.65);
  color: #555;
  font-size: 0.875rem;
  pointer-events: none;
  z-index: 2;
}

.merge-viewport-hint {
  position: absolute;
  left: 0.5rem;
  bottom: 0.4rem;
  font-size: 0.6875rem;
  color: #888;
  pointer-events: none;
  z-index: 1;
}

.merge-message {
  max-width: 920px;
  margin: 0 auto 1rem;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  font-size: 0.875rem;
}

.merge-message--error {
  color: #a4262c;
  background: #fdf3f4;
  border: 1px solid #f1bbbc;
}

.merge-message--busy {
  color: #2d7d55;
  background: #f0faf4;
  border: 1px solid #b8e6cb;
}

.merge-features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 0.5rem;
}

.merge-features-desc {
  font-size: 0.9375rem;
  color: #555;
  line-height: 1.7;
  margin: 0;
}

.merge-features-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.merge-features-list li {
  position: relative;
  padding-left: 1.35rem;
  margin-bottom: 0.65rem;
  font-size: 0.9375rem;
  color: #444;
  line-height: 1.55;
}

.merge-features-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #3a9d6c;
}