.mosaic-mode .source-stage {
  display: grid;
  grid-template-columns: minmax(760px, 1fr) 360px;
  gap: 22px;
  align-items: stretch;
}

.mosaic-mode .source-panel,
.mosaic-mode .mosaic-overview-panel {
  height: 100%;
}

.mosaic-mode .history-thumb {
  object-fit: contain;
  background: #c7cacf;
}

.mosaic-mode .source-panel > .crop-wrap #sourceCanvas {
  width: 100%;
  height: 100%;
}

.mosaic-mode .source-panel > .crop-wrap .crop-frame::before,
.mosaic-mode .source-panel > .crop-wrap .crop-frame::after {
  display: none;
}

.crop-guide-lines {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.crop-guide-line {
  position: absolute;
  z-index: 1;
  pointer-events: none;
}

.crop-guide-line.vertical {
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, .88);
  box-shadow: -1px 0 0 rgba(17, 19, 22, .52), 1px 0 0 rgba(17, 19, 22, .52);
  transform: translateX(-.5px);
}

.crop-guide-line.horizontal {
  right: 0;
  left: 0;
  height: 1px;
  background: rgba(255, 255, 255, .88);
  box-shadow: 0 -1px 0 rgba(17, 19, 22, .52), 0 1px 0 rgba(17, 19, 22, .52);
  transform: translateY(-.5px);
}

.mosaic-mode .source-panel {
  grid-template-columns: minmax(320px, .78fr) minmax(0, 1.22fr);
  grid-template-rows: auto minmax(280px, 1fr);
}

.mosaic-mode .source-panel > .control-grid > .mosaic-size-control {
  grid-column: 1 / 3;
  grid-row: 4;
}

.mosaic-mode .source-panel > .control-grid > #generateBtn {
  grid-column: 3;
  grid-row: 4;
}

.mosaic-size-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 8px;
  align-items: end;
  min-width: 0;
  margin: 0;
  padding: 5px 9px 7px;
  border: 1px solid #aeb3b7;
  background: rgba(255, 255, 255, .54);
}

.mosaic-size-control legend {
  padding: 0 5px;
  color: #53575b;
  font-size: 11px;
  font-weight: 800;
}

.mosaic-size-control label {
  display: grid;
  grid-template-columns: auto minmax(48px, 1fr);
  gap: 6px;
  align-items: center;
}

.mosaic-size-control label > span {
  white-space: nowrap;
}

.mosaic-size-control select {
  width: 100%;
  min-width: 0;
  min-height: 31px;
  height: 31px;
  padding: 3px 5px;
  border: 1.5px solid #111316;
  background: #fff;
  color: #111316;
  font-weight: 800;
}

.mosaic-size-control > b {
  align-self: center;
  padding-top: 2px;
  font: 900 15px/1 Consolas, monospace;
}

.mosaic-mode .mosaic-overview-panel {
  margin: 0;
  padding-left: 16px;
  padding-right: 16px;
}

.mosaic-overview-panel .step { box-shadow: inset 4px 0 0 var(--acid); }

.master-preview-wrap {
  position: relative;
  display: grid;
  min-height: 350px;
  place-items: center;
  width: min(100%, 310px);
  margin-left: auto;
  margin-right: auto;
  margin-top: 14px;
  padding: 10px 10px 40px;
  border: 2px solid #111316;
  background: #d9dcdf;
  box-shadow: 7px 7px 0 var(--cyan), -4px -4px 0 rgba(255,43,145,.65);
}

#masterCanvas {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 310px;
  cursor: pointer;
  background: #fff;
  image-rendering: pixelated;
}

.master-preview-tip {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 10px;
  color: #555c61;
  font-size: 11px;
  font-weight: 800;
  text-align: center;
}

.tile-navigation {
  display: grid;
  grid-template-columns: 118px minmax(220px, 1fr) 118px;
  gap: 14px;
  align-items: stretch;
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid #bfc2c6;
  background: rgba(233,234,237,.78);
}

.tile-navigation .button {
  min-height: 58px;
}

.tile-navigation .tile-nav-button {
  border-color: #111316;
  background: #f8f9fa;
  color: #111316;
  box-shadow: none;
  clip-path: none;
}

.tile-navigation .tile-nav-button:hover:not(:disabled) {
  background: rgba(24, 212, 209, .14);
  box-shadow: 4px 4px 0 rgba(24, 212, 209, .72);
}

.tile-progress {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 14px;
  align-content: center;
  min-width: 0;
}

.tile-progress strong {
  overflow: hidden;
  font-size: 17px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tile-progress > span:not(.tile-progress-track) {
  color: #62676d;
  font-size: 11px;
  font-weight: 800;
}

.tile-progress-track {
  grid-column: 1 / -1;
  overflow: hidden;
  height: 8px;
  border: 1px solid #111316;
  background: #d2d5d8;
}

.tile-progress-track i {
  display: block;
  width: 6.25%;
  height: 100%;
  background: var(--cyan);
  transition: width .22s ease;
}

.tile-card-stack {
  position: relative;
  width: min(100%, 800px);
  margin: 16px auto 38px;
  isolation: isolate;
  perspective: 1200px;
}

.tile-card-stack .editor-canvas-wrap {
  position: relative;
  z-index: 40;
  width: 100%;
  margin: 0;
  background: #f5f6f7;
  transform-origin: 50% 50%;
}

.tile-card-backs {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.tile-card-back {
  position: absolute;
  inset: 0;
  border: 2px solid #111316;
  background: var(--stack-paper, #eff1f2);
  box-shadow: 2px 2px 0 var(--stack-color, rgba(17, 19, 22, .35));
  transform: translate(var(--stack-x, 0), var(--stack-y, 0)) rotate(var(--stack-rotate, 0));
  pointer-events: none;
}

.tile-card.slide-out-left {
  animation: mosaic-slide-out-left .28s cubic-bezier(.55,.05,.78,.28) both;
  pointer-events: none;
}

.tile-card.slide-in-left {
  animation: mosaic-slide-in-left .32s cubic-bezier(.18,.82,.25,1) both;
  pointer-events: none;
}

@keyframes mosaic-slide-out-left {
  from { opacity: 1; transform: translateX(0) rotate(0); }
  to { opacity: 0; transform: translateX(-118%) rotate(-4deg); }
}

@keyframes mosaic-slide-in-left {
  from { opacity: 0; transform: translateX(-118%) rotate(-4deg); }
  to { opacity: 1; transform: translateX(0) rotate(0); }
}

.mosaic-notice-dialog { max-width: 540px; }
.mosaic-notice-card { text-align: center; }
.mosaic-notice-card h2 { margin: 14px 0 12px; }
.mosaic-notice-card p:not(.author-kicker) { margin: 0 0 14px; font-size: 17px; line-height: 1.7; font-weight: 800; }
.mosaic-notice-card .button { min-width: 150px; }

#mosaicNoticeConfirmBtn {
  min-width: 235px;
  padding-right: 58px;
}

#mosaicNoticeConfirmBtn::after {
  right: 18px;
}

.mosaic-export-order {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 6px;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  padding: 14px;
  background: #e9ebed;
  border: 1px solid #111316;
  font: 900 14px/1 Consolas, monospace;
}

.mosaic-export-order strong {
  display: grid;
  width: 34px;
  height: 30px;
  place-items: center;
  color: #fff;
  background: #111316;
}

.mosaic-export-order span {
  color: #d91f65;
}

.mosaic-blank-board-warning {
  margin: 0 0 14px;
  padding: 13px 15px;
  border: 2px solid #111316;
  border-left: 8px solid var(--pink);
  background: #fff2f7;
  color: #111316;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.65;
  text-align: left;
}

.mosaic-blank-board-warning strong {
  color: #d51066;
  font-size: 17px;
}

.mosaic-blank-board-warning.is-complete {
  border-left-color: var(--cyan);
  background: #edffff;
}

.mosaic-export-note {
  display: block;
  margin: 0 0 18px;
  color: #62676d;
  font-size: 11px;
  font-weight: 700;
}

.mosaic-help-dialog {
  width: min(680px, calc(100vw - 28px));
  max-width: 680px;
}

.mosaic-help-card {
  text-align: left;
}

.mosaic-help-card h2 {
  margin: 14px 0 16px;
}

.mosaic-help-steps {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: mosaic-guide;
}

.mosaic-help-steps li {
  position: relative;
  padding: 13px 14px 13px 52px;
  border: 1px solid #b7bcc0;
  background: #f2f3f4;
  color: #303538;
  font-size: 14px;
  line-height: 1.65;
  counter-increment: mosaic-guide;
}

.mosaic-help-steps li::before {
  content: "0" counter(mosaic-guide);
  position: absolute;
  top: 13px;
  left: 13px;
  color: #fff;
  background: #111316;
  padding: 4px 6px;
  font: 900 12px/1 Consolas, monospace;
}

.mosaic-help-steps li.important {
  border: 2px solid #111316;
  border-left: 8px solid var(--pink);
  background: #fff1f7;
}

.mosaic-help-steps em {
  color: #c50e5d;
  font-style: normal;
  font-weight: 900;
}

.mosaic-help-summary {
  margin: 14px 0 18px;
  padding: 11px 14px;
  border-left: 7px solid var(--cyan);
  background: #eaffff;
  font-size: 15px;
  line-height: 1.6;
}

.mosaic-help-card > .button {
  display: block;
  min-width: 150px;
  margin-left: auto;
}

@media (max-width: 500px) {
  .mosaic-export-order { gap: 7px 3px; padding: 10px 6px; }
  .mosaic-export-order strong { width: 28px; height: 27px; font-size: 12px; }
}

@media (max-width: 1280px) {
  .mosaic-mode .source-stage { grid-template-columns: minmax(720px, 1fr) 320px; }
}

@media (max-width: 1080px) {
  .mosaic-mode .source-stage { grid-template-columns: 1fr; }
  .mosaic-mode .mosaic-overview-panel { width: min(100%, 620px); justify-self: center; }
}

@media (max-width: 680px) {
  .mosaic-mode .source-panel {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .mosaic-mode .source-panel > .drop-zone,
  .mosaic-mode .source-panel > .crop-wrap {
    grid-column: 1;
    grid-row: 2;
  }

  .mosaic-mode .source-panel > .control-grid {
    grid-column: 1;
    grid-row: 3;
  }

  .mosaic-mode .source-panel > .control-grid > .mosaic-size-control,
  .mosaic-mode .source-panel > .control-grid > #generateBtn {
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .tile-navigation { grid-template-columns: 1fr 1fr; }
  .tile-progress { grid-column: 1 / -1; grid-row: 1; }
  .tile-navigation #prevTileBtn { grid-column: 1; }
  .tile-navigation #nextTileBtn { grid-column: 2; }
}

@media (prefers-reduced-motion: reduce) {
  .tile-card.slide-out-left,
  .tile-card.slide-in-left { animation-duration: .01ms; }
}