.design-studio .lite-app {
  width: 100%; height: 100dvh; padding: 50px 8px 8px; display: block; position: relative;
}
.design-mode-switch {
  position: absolute; z-index: 12; top: 8px; left: 50%; transform: translateX(-50%);
  display: grid; grid-template-columns: repeat(2, max-content); gap: 3px; padding: 3px;
  border: 1px solid var(--line); border-radius: 999px; background: color-mix(in srgb, var(--paper) 92%, transparent);
  box-shadow: 0 8px 24px rgba(29, 31, 37, .12);
}
.design-mode-switch button {
  min-height: 34px; padding: 6px 16px; border: 0; border-radius: 999px; color: var(--muted);
  background: transparent; font-weight: 700; cursor: pointer;
}
.design-mode-switch button.is-active { color: #fff; background: #29394d; }
.design-studio .lite-workspace {
  height: 100%; margin: 0; gap: 8px; border: 0; background: transparent;
  grid-template-columns: minmax(0, 38fr) minmax(0, 62fr);
  grid-template-rows: minmax(0, 45fr) minmax(0, 55fr);
  grid-template-areas: "model controls" "model cloth";
}
.design-studio .model-stage { grid-area: model; border: 1px solid var(--line); }
.design-studio .lite-controls { grid-area: controls; border: 1px solid var(--line); }
.design-studio .editor-panel { padding: 12px; }
.design-studio .editor-tab { font-size: 13px; padding-inline: 4px; white-space: nowrap; }
.design-studio .stamp-palette { grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); }
.cloth-dock {
  grid-area: cloth; min-width: 0; min-height: 0; overflow: hidden;
  display: flex; flex-direction: column; border: 1px solid var(--line); background: var(--paper);
}
.cloth-dock-heading { display: flex; align-items: center; gap: 12px; padding: 8px 12px; font-size: 12px; }
.cloth-dock-heading span { color: var(--muted); }
.cloth-dock-heading a { margin-left: auto; color: var(--ink); font-size: 11px; }
.cloth-dock .stamp-canvas-scroll {
  flex: 1; min-height: 0; overflow: auto; padding: 6px 12px 12px;
  display: flex; align-items: flex-start;
}
.cloth-dock #stampCanvas { flex: 0 0 auto; border-radius: 3px; }
.cloth-dock #stampCanvas[data-layout="strip"] { width: auto !important; height: 100% !important; min-height: 280px; margin: auto; }
.cloth-dock #stampCanvas[data-layout="square"] { width: auto !important; height: 100% !important; margin: auto; }
.paper-craft-mode {
  height: 100%; min-height: 0; display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 8px;
}
.paper-craft-mode[hidden] { display: none; }
.paper-craft-stage {
  min-width: 0; min-height: 0; display: grid; place-items: center; overflow: auto; padding: 18px;
  border: 1px solid var(--line); border-radius: 8px; background: #c9c8c3;
}
#paperCraftCanvas {
  display: block; width: auto; height: min(100%, 820px); max-width: 100%; aspect-ratio: 210 / 297;
  background: #fff; box-shadow: 0 14px 38px rgba(31, 34, 42, .25);
}
.paper-craft-controls {
  min-height: 0; overflow: auto; padding: 24px 18px; border: 1px solid var(--line); border-radius: 8px;
  color: var(--ink); background: var(--paper);
}
.paper-craft-kicker { color: #a32f55; font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.paper-craft-controls h2 { margin: 5px 0 12px; font-size: 24px; line-height: 1.3; }
.paper-craft-controls > p { margin: 0 0 18px; color: var(--muted); font-size: 14px; line-height: 1.75; }
.paper-craft-parts { display: grid; gap: 8px; margin: 0 0 20px; }
.paper-craft-parts div { display: grid; grid-template-columns: 30px 1fr; gap: 10px; align-items: center; padding: 9px; border: 1px solid var(--line); border-radius: 8px; }
.paper-craft-parts dt { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; color: #fff; background: #a32f55; font-weight: 800; }
.paper-craft-parts dd { margin: 0; }
.paper-craft-parts strong, .paper-craft-parts span { display: block; }
.paper-craft-parts span { margin-top: 2px; color: var(--muted); font-size: 12px; }
.paper-craft-print, .paper-craft-back { width: 100%; min-height: 44px; border-radius: 8px; font-weight: 800; cursor: pointer; }
.paper-craft-print { border: 0; color: #fff; background: #a32f55; }
.paper-craft-back { margin-top: 8px; border: 1px solid var(--line); color: var(--ink); background: transparent; }
.paper-craft-controls > small { display: block; margin-top: 12px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.design-studio.is-paper-mode .lite-workspace { display: none; }
@media (max-width: 820px) {
  .design-studio .lite-workspace { grid-template-columns: minmax(0, 42fr) minmax(0, 58fr); }
  .design-studio .editor-panel { padding: 12px; }
  .cloth-dock-heading span { display: none; }
}
@media (max-width: 580px) {
  .design-studio .lite-app { padding: 48px 4px 4px; }
  .design-studio .lite-workspace {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr) 180px minmax(0, .8fr);
    grid-template-areas: "model" "cloth" "controls"; gap: 4px;
  }
  .cloth-dock .stamp-canvas-scroll { padding: 2px 6px 6px; }
  .cloth-dock #stampCanvas[data-layout="strip"] { min-height: 280px; }
  .paper-craft-mode { grid-template-columns: 1fr; grid-template-rows: minmax(360px, 1fr) auto; }
  .paper-craft-stage { padding: 8px; }
  .paper-craft-controls { padding: 16px; }
}

.design-studio .editor-panel h3,
.design-studio .editor-panel .step-label,
.design-studio .editor-panel summary {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
  margin: 12px 0 8px;
}
.design-studio .editor-panel p {
  font-size: 12px;
  line-height: 1.7;
  margin: 6px 0 12px;
}
.design-studio .design-section-heading { margin-top: 4px; }
.design-studio .lite-workspace { overflow: auto; scrollbar-gutter: stable; }
@media (min-width:581px) {
  .design-studio .model-stage { position:sticky; top:0; align-self:start; height:calc(100dvh - 58px); min-height:0; }
}
.design-studio .lite-controls, .design-studio .cloth-dock { position: relative; padding-bottom: 12px; }
.panel-resize-handle { position:absolute; z-index:15; left:0; right:0; bottom:0; height:12px; cursor:ns-resize; touch-action:none; background:#e1d9d2; }
.panel-resize-handle::after { content:''; display:block; width:44px; height:3px; margin:4px auto; border-radius:3px; background:#8c7f79; }
.panel-resize-handle:hover, .panel-resize-handle:focus-visible { background:#ccb9c0; outline:2px solid #963453; outline-offset:-2px; }
@media (max-width:580px) { .panel-resize-handle { display:none; } }

@media print {
  @page { size: A4 portrait; margin: 0; }
  html, body.design-studio { width: 210mm; height: 297mm; margin: 0; padding: 0; background: #fff !important; }
  .design-studio .lite-app { width: 210mm; height: 297mm; margin: 0; padding: 0; }
  .design-mode-switch, .lite-workspace, .paper-craft-controls { display: none !important; }
  .paper-craft-mode, .paper-craft-stage { display: block !important; width: 210mm; height: 297mm; margin: 0; padding: 0; border: 0; overflow: hidden; background: #fff; }
  #paperCraftCanvas { width: 210mm; height: 297mm; max-width: none; box-shadow: none; }
}