/* Base overlay (runtime) */
:root, html, body { margin:0; padding:0; height:100%; width:100%; background:transparent; }
body { -ms-overflow-style:none; scrollbar-width:none; }
body::-webkit-scrollbar { display:none; }
.overlay-root { position:fixed; inset:0; display:flex; align-items:flex-start; justify-content:center; background:transparent; }
@media (min-aspect-ratio: 16/9) { .overlay-stage { height:100vh; width:calc(100vh * 16 / 9); --stageH:100vh; } }
@media (max-aspect-ratio: 16/9) { .overlay-stage { width:100vw; height:calc(100vw * 9 / 16); --stageH:calc(100vw * 9 / 16); } }
.overlay-stage { position:relative; background:transparent; overflow:hidden; font-smooth:always; -webkit-font-smoothing:antialiased; }
.overlay-stage { --scale: calc(var(--overlay-scale-base, 1) * ( (min(100vh, calc(100vw * 9 / 16))) / 1080 )); }
.overlay-stage.bg-transparent { background:transparent; }
.overlay-item { position:absolute; user-select:none; pointer-events:none; white-space:nowrap; line-height:1.2; }
.overlay-item.text-item { z-index:1000; padding:2px 4px; }
.overlay-item.shape-item { z-index:0;}
/* New masked background layer (for holes in live overlay) */
.overlay-masked-bg { position:absolute; inset:0; z-index:0; pointer-events:none; }

/* ══════════════════════════════════════════════════════════════
   Designer layout — 3-panel grid
   ══════════════════════════════════════════════════════════════ */
.overlay-designer-shell {
  --color-bg:#0f1014; --color-surface:#171a21; --color-surface-alt:#1f242c;
  --color-border:#2b313b; --color-border-soft:#303642;
  --color-text:#f4f6fa; --color-text-muted:#b9c4d3;
  --color-accent:#ff8a3c; --color-accent-alt:#ffb347; --color-accent-rgb:255,138,60;
  --color-focus:rgba(255,138,60,.38);
  --color-input-bg:#b9c4d3; --color-input-border:#4a5568; --color-input-text:#171a21;
  --color-positive:#4ccd7b; --color-danger:#ff625d;
  --radius-sm:6px;
  --font-stack:system-ui,-apple-system,Segoe UI,Roboto,Inter,Helvetica,Arial,sans-serif;
  font-family: var(--font-stack);
  background: var(--color-bg);
  color: var(--color-text);
  height: 100vh; width: 100%; overflow: hidden;
  display: flex; flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ── Compact top bar ── */
.designer-topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 0 16px; height: 38px; min-height: 38px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  font-size: .78rem; color: var(--color-text-muted);
  z-index: 10;
}
.designer-topbar .brand-link { display:flex; align-items:center; text-decoration:none; }
.designer-topbar .brand-link img { height:20px; width:auto; opacity:.85; }
.designer-topbar .brand-link:hover img { opacity:1; }
.designer-topbar .topbar-sep { width:1px; height:18px; background:var(--color-border); }
.designer-topbar .topbar-title { font-weight:600; letter-spacing:.04em; color:var(--color-text); font-size:.8rem; }
.designer-topbar .topbar-spacer { flex:1; }
.designer-topbar a { color:var(--color-text-muted); text-decoration:none; font-weight:500; transition:.15s; }
.designer-topbar a:hover { color:var(--color-accent); }

.overlay-layout {
  display: grid;
  grid-template-columns: 240px 1fr 280px;
  flex: 1; min-height: 0;
  width: 100%;
  overflow: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-stack);
}

/* ── Left sidebar ── */
.overlay-sidebar {
  background: var(--color-surface);
  color: var(--color-text);
  padding: 10px 12px 14px;
  overflow-y: auto;
  overflow-x: hidden;
  border-right: 1px solid var(--color-border);
  font-size: .82rem;
  line-height: 1.3;
}
.overlay-sidebar h6, .overlay-sidebar strong { color:#fff; }
.overlay-sidebar .el-row { display:flex; gap:6px; align-items:center; padding:4px 6px; border:1px solid transparent; cursor:pointer; background:var(--color-surface-alt); border-radius:4px; transition:background .12s,border-color .12s; }
.overlay-sidebar .el-row:hover { background:var(--color-border); }
.overlay-sidebar .el-row + .el-row { margin-top:3px; }
.overlay-sidebar .el-row.sel { border-color:var(--color-accent); background:rgba(var(--color-accent-rgb),.18); }
.overlay-sidebar .mini-preview { font-size:.7rem; opacity:.75; }
.overlay-sidebar input.form-control, .overlay-sidebar select.form-select, .overlay-sidebar button.btn { font-size:.75rem; }
.overlay-sidebar .btn { border-radius:4px; }
.overlay-sidebar .btn-group .btn { flex:1 0 auto; }
.overlay-sidebar label { font-weight:500; }
.overlay-sidebar .form-check-label, .overlay-sidebar .label { color:var(--color-text); }
.overlay-sidebar .form-check-input { accent-color:var(--color-accent); }
.overlay-sidebar input[type=range] { accent-color:var(--color-accent); }
.overlay-sidebar input, .overlay-sidebar select, .overlay-sidebar button { color:#f5f7fa; }
.overlay-sidebar .form-control { background:var(--color-input-bg,#b9c4d3); border:1px solid var(--color-input-border,#4a5568); color:#f5f7fa; }
.overlay-sidebar .form-select { background:var(--color-input-bg,#b9c4d3) !important; border:1px solid var(--color-input-border,#4a5568) !important; color:#f5f7fa !important; }
.overlay-sidebar .form-select option { background:var(--color-surface); color:var(--color-text); }
.overlay-sidebar .form-control::placeholder { color:#aab7c5; opacity:1; }
.overlay-sidebar .form-control:focus, .overlay-sidebar .form-select:focus { border-color:var(--color-accent,#ff8a3c); box-shadow:0 0 0 3px var(--color-focus,rgba(255,138,60,.38)); color:#ffffff; background:var(--color-input-bg,#b9c4d3) !important; }

/* Section labels */
.overlay-sidebar .section-label {
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  font-weight: 700;
  margin: 0;
  padding: 0;
}

/* Element groups (collapsible) */
.overlay-sidebar .element-group { margin-bottom: 2px; }
.overlay-sidebar .element-group > summary {
  display: flex; align-items: center;
  padding: 5px 2px;
  cursor: pointer;
  font-size: .72rem; font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  user-select: none;
  list-style: none;
}
.overlay-sidebar .element-group > summary::-webkit-details-marker { display:none; }
.overlay-sidebar .element-group > summary::before {
  content: "\25B8"; margin-right: 5px; font-size: .65rem;
  transition: transform 0.15s;
}
.overlay-sidebar .element-group[open] > summary::before { transform: rotate(90deg); }
.overlay-sidebar .element-group > summary:hover { color: var(--color-text); }
.overlay-sidebar .element-group > summary .grp-count {
  margin-left: auto; font-size: .65rem; color: var(--color-text-muted); font-weight: 400;
}
.overlay-sidebar .element-group-body { padding: 0 0 2px 6px; }

/* ── Center canvas ── */
.overlay-main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 8px 10px 8px;
  background: var(--color-bg);
  color: var(--color-text);
}

/* ── Right properties panel ── */
.properties-panel {
  background: var(--color-surface);
  color: var(--color-text);
  overflow-y: auto;
  overflow-x: hidden;
  border-left: 1px solid var(--color-border);
  font-size: .82rem;
  line-height: 1.3;
}
.properties-panel .panel-header {
  padding: 10px 12px 8px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky; top: 0; z-index: 1;
}
.properties-panel .panel-header .selected-name { font-weight: 700; color: #fff; font-size: .88rem; }
.properties-panel .panel-header .selected-kind {
  font-size: .68rem; color: var(--color-text-muted);
  text-transform: uppercase; letter-spacing: 0.05em; margin-top: 1px;
}

/* Collapsible property sections */
.properties-panel .prop-section { border-bottom: 1px solid var(--color-surface-alt); }
.properties-panel .prop-section > summary {
  display: flex; align-items: center;
  padding: 7px 12px;
  cursor: pointer;
  font-size: .7rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
  user-select: none;
  list-style: none;
}
.properties-panel .prop-section > summary::-webkit-details-marker { display:none; }
.properties-panel .prop-section > summary::before {
  content: "\25B8"; margin-right: 6px; font-size: .65rem;
  transition: transform 0.15s;
}
.properties-panel .prop-section[open] > summary::before { transform: rotate(90deg); }
.properties-panel .prop-section > summary:hover { background: var(--color-border); color: var(--color-text); }
.properties-panel .prop-section-body {
  padding: 8px 12px 10px;
  display: flex; flex-direction: column; gap: 7px;
}

/* Property row: label + control */
.properties-panel .prop-row {
  display: flex; align-items: center; gap: 8px;
}
.properties-panel .prop-row > label {
  flex: 0 0 auto; min-width: 68px;
  font-size: .75rem; font-weight: 500; color: var(--color-text-muted);
}
.properties-panel .prop-row > .prop-control { flex: 1; min-width: 0; }

/* Full-width control (textarea etc) */
.properties-panel .prop-full {
  display: flex; flex-direction: column; gap: 3px;
}
.properties-panel .prop-full > label { font-size: .75rem; font-weight: 500; color: var(--color-text-muted); }

/* Range + value display */
.properties-panel .range-with-value { display: flex; align-items: center; gap: 6px; }
.properties-panel .range-with-value input[type=range] { flex: 1; }
.properties-panel .range-with-value .range-val {
  flex: 0 0 auto; min-width: 38px; text-align: right;
  font-size: .72rem; color: var(--color-text); font-weight: 500; font-variant-numeric: tabular-nums;
}

/* Actions footer */
.properties-panel .prop-actions {
  display: flex; gap: 6px; padding: 8px 12px;
  border-top: 1px solid var(--color-surface-alt);
}

/* Panel form controls */
.properties-panel .form-control,
.properties-panel .form-control-sm {
  background: var(--color-input-bg,#b9c4d3); border: 1px solid var(--color-input-border,#4a5568); color: #f5f7fa; font-size: .78rem;
}
.properties-panel .form-control:focus,
.properties-panel .form-control-sm:focus {
  border-color: var(--color-accent,#ff8a3c); box-shadow: 0 0 0 3px var(--color-focus,rgba(255,138,60,.38)); color: #fff; background: var(--color-input-bg,#b9c4d3);
}
.properties-panel .form-select {
  background: var(--color-input-bg,#b9c4d3); border: 1px solid var(--color-input-border,#4a5568); color: #f5f7fa; font-size: .78rem;
}
.properties-panel .form-select:focus {
  border-color: var(--color-accent,#ff8a3c); box-shadow: 0 0 0 3px var(--color-focus,rgba(255,138,60,.38)); color: #fff; background: var(--color-input-bg,#b9c4d3);
}
.properties-panel .form-select option { background: var(--color-surface); color: var(--color-text); }
.properties-panel input[type=color] { background: var(--color-surface-alt); border: 1px solid var(--color-border-soft); width: 2.2rem; height: 1.8rem; padding: 2px; cursor: pointer; }
.properties-panel input[type=range] { accent-color: var(--color-accent); }
.properties-panel .form-check-input { accent-color: var(--color-accent); }
.properties-panel .form-check-label { color: #e9ecf1; font-size: .78rem; }
.properties-panel input[type=number] {
  background: var(--color-surface-alt); border: 1px solid var(--color-border-soft); color: var(--color-text); line-height: 1.2;
}
.properties-panel input[type=number]:focus {
  border-color: var(--color-accent); box-shadow: 0 0 0 2px var(--color-focus); color: #fff;
}
.properties-panel .btn { border-radius: 4px; font-size: .75rem; }

/* Empty state */
.properties-panel .empty-state {
  padding: 2.5rem 1rem; text-align: center; color: var(--color-text-muted);
}
.properties-panel .empty-state .empty-icon { font-size: 2rem; opacity: .25; margin-bottom: .5rem; }

/* ══════════════════════════════════════════════════════════════
   Design surface
   ══════════════════════════════════════════════════════════════ */
.design-surface-wrapper { flex:1; position:relative; overflow:hidden; display:flex; align-items:center; justify-content:center; background:var(--color-bg); border:1px solid var(--color-border); border-radius:var(--radius-sm, 6px); box-shadow:inset 0 0 0 1px rgba(0,0,0,.3); }
.design-surface-wrapper .design-surface-host { position:absolute; width:1920px; height:1080px; transform-origin:top left; }
.design-surface-wrapper .overlay-root { position:static; inset:auto; display:block; width:100%; height:100%; }
.design-surface-wrapper .overlay-stage { width:100%; height:100%; background:#000; box-shadow:0 0 0 1px #333, 0 0 12px rgba(0,0,0,.8); --stageH:1080px; }
.design-surface-wrapper .overlay-stage.with-grid { background:#000; }
.design-surface-wrapper .overlay-stage.with-grid::after {
  --grid-x: 19.2px; --grid-y: 10.8px;
  content:""; position:absolute; inset:0; pointer-events:none; z-index:2000;
  background-image:
     linear-gradient(to right, rgba(255,255,255,0.18) 0, rgba(255,255,255,0.18) 1px, transparent 1px),
     linear-gradient(to bottom, rgba(255,255,255,0.18) 0, rgba(255,255,255,0.18) 1px, transparent 1px);
  background-size: var(--grid-x) 100%, 100% var(--grid-y);
  background-position: 0 0, 0 0; background-repeat: repeat;
  mix-blend-mode:normal; image-rendering:pixelated;
}
.design-surface-wrapper .overlay-stage.with-grid::before {
  content:""; position:absolute; inset:0; pointer-events:none; z-index:1999;
  background-image:
     linear-gradient(to right, rgba(255,255,255,0.30) 0, rgba(255,255,255,0.30) 2px, transparent 2px),
     linear-gradient(to bottom, rgba(255,255,255,0.30) 0, rgba(255,255,255,0.30) 2px, transparent 2px);
  background-size: 192px 100%, 100% 108px;
  background-repeat: repeat;
}

/* Selection + resize handles */
.overlay-item.selected { outline:2px solid var(--color-accent, #ff8a3c); outline-offset:0; }
.overlay-item[data-oid] { pointer-events:auto; }
.resize-handle { position:absolute; width:14px; height:14px; background:var(--color-accent, #ff8a3c); border:2px solid #fff; border-radius:3px; box-sizing:border-box; pointer-events:auto; box-shadow:0 0 0 1px rgba(0,0,0,.6),0 0 4px rgba(0,0,0,.5); }
.resize-handle.tl { top:-7px; left:-7px; cursor:nwse-resize; }
.resize-handle.tr { top:-7px; right:-7px; cursor:nesw-resize; }
.resize-handle.bl { bottom:-7px; left:-7px; cursor:nesw-resize; }
.resize-handle.br { bottom:-7px; right:-7px; cursor:nwse-resize; }
.rect-item, .circle-item, .image-item, .board-item { box-sizing:border-box; }
.rect-item:not(.selected), .circle-item:not(.selected) { box-shadow:0 0 0 1px rgba(255,255,255,0.15) inset; }
.board-item .board-fill { width:100%; height:100%; display:flex; align-items:center; justify-content:center; }
.overlay-item.text-item { display:flex; align-items:center; justify-content:center; }
.bg-dark-subtle { background:rgba(255,255,255,0.05)!important; }
.overlay-item.selected[data-oid] { cursor:move; }
.overlay-item[data-oid] { cursor:default; }
.overlay-item.hole-item { background:rgba(255,255,255,0.05)!important; mix-blend-mode:normal; outline:1px dashed rgba(255,255,255,0.35); }
.overlay-item.hole-item.selected { outline:2px solid #ffb347; }
.overlay-root.design-mode .hole-item { z-index: 700; }

/* Board item container */
.overlay-item.board-item { position:absolute; }
.overlay-item.board-item > .board-fill { position:absolute; inset:0; display:flex; align-items:center; justify-content:center; }
.overlay-item.board-item .board-container { position:relative; }

/* Free text editor */
.free-text-editor { background:var(--color-surface-alt); color:var(--color-text); border:1px solid var(--color-border-soft); resize:vertical; }
.free-text-editor:focus { background:var(--color-surface-alt); color:var(--color-text); border-color:var(--color-accent); box-shadow:0 0 0 2px var(--color-focus); }
.overlay-fill { position:absolute; inset:0; width:100%; height:100%; mask-repeat:no-repeat; -webkit-mask-repeat:no-repeat; }

/* Free text scrolling */
.text-item { box-sizing:border-box; padding:4px; overflow:hidden; }
.text-item.scroll-text { position:relative; --scroll-speed:10s; --track-size:0px; --host-size:0px; --scroll-distance:0px; }
.text-item.scroll-text .scroll-track { display:flex; will-change:transform; animation-duration:var(--scroll-speed,10s); animation-timing-function:linear; }
.text-item.scroll-text.continuous .scroll-track { animation-iteration-count:infinite; }
.text-item.scroll-text.non-continuous .scroll-track { animation-iteration-count:1; animation-fill-mode:forwards; }
.text-item.scroll-text.scroll-h .scroll-track { flex-direction:row; gap:3rem; }
.text-item.scroll-text.scroll-v .scroll-track { flex-direction:column; gap:1rem; }
.text-item.scroll-text .scroll-seg { white-space:nowrap; flex-shrink:0; }
.text-item.scroll-text.scroll-h.start-on .scroll-track { animation-name:scroll-h-on-unified; }
.text-item.scroll-text.scroll-h.start-off .scroll-track { animation-name:scroll-h-off-unified; }
.text-item.scroll-text.scroll-v.start-on .scroll-track { animation-name:scroll-v-on-unified; }
.text-item.scroll-text.scroll-v.start-off .scroll-track { animation-name:scroll-v-off-unified; }
@keyframes scroll-h-on-unified { from { transform:translateX(0); } to { transform:translateX(calc(-1 * var(--scroll-distance))); } }
@keyframes scroll-h-off-unified { from { transform:translateX(var(--host-size)); } to { transform:translateX(calc(-1 * var(--track-size))); } }
@keyframes scroll-v-on-unified { from { transform:translateY(0); } to { transform:translateY(calc(-1 * var(--scroll-distance))); } }
@keyframes scroll-v-off-unified { from { transform:translateY(var(--host-size)); } to { transform:translateY(calc(-1 * var(--track-size))); } }
.text-item.scroll-text .scroll-track { position:relative; }
.text-item.scroll-text .scroll-track .message { }
.text-item.scroll-text.scroll-h .scroll-track .message { margin-right:var(--host-size); }
.text-item.scroll-text.scroll-v .scroll-track .message { margin-bottom:var(--host-size); }
.text-item.scroll-text.scroll-h .scroll-track .message:last-child { margin-right:0; }
.text-item.scroll-text.scroll-v .scroll-track .message:last-child { margin-bottom:0; }

/* Image picker (sidebar) */
.image-picker .image-list { max-height: 200px; overflow-y: auto; }
.image-picker .image-item-row { display: flex; gap: 6px; align-items: center; padding: 4px; cursor: pointer; border-radius: 4px; }
.image-picker .image-item-row:hover { background: var(--color-border); }
.image-picker .image-item-row img { width: 36px; height: 36px; object-fit: cover; border-radius: 3px; }
.image-picker .meta .name { font-size: .75rem; color: var(--color-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 140px; }
.image-picker .meta .created { font-size: .65rem; color: var(--color-text-muted); }