:root {
  --bg: #eef1f6;
  --surface: #ffffff;
  --border: #d9dee8;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --danger: #dc2626;
  --radius: 8px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  color: var(--text);
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }

body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--bg);
}

button, select, input, textarea { font: inherit; color: inherit; }

button, select {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
}
button:hover:not(:disabled), select:hover { border-color: #b7bfce; background: #f8fafc; }
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: #4338ca; }
button.danger { color: var(--danger); }
button.toggle[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }
button.mini { padding: 2px 8px; line-height: 1.2; }

input[type="text"], input[type="number"], input:not([type]), textarea {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
}
textarea { resize: vertical; }

h2 { margin: 0 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
h3 { margin: 0 0 8px; font-size: 13px; }
.muted { color: var(--muted); font-size: 12px; }

/* ---------- toolbar ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 8px 14px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 800; font-size: 16px; }
.brand span { color: var(--accent); }
.project-name { max-width: 220px; font-weight: 600; }
.group { display: flex; gap: 6px; align-items: center; }

/* ---------- workspace ---------- */
.workspace {
  display: grid;
  grid-template-columns: 200px 1fr 290px;
  min-height: 0;
}

.palette, .panel {
  padding: 14px;
  background: var(--surface);
  overflow-y: auto;
}
.palette { border-right: 1px solid var(--border); }
.panel { border-left: 1px solid var(--border); }

.palette-list { display: grid; gap: 6px; margin-bottom: 10px; }
.palette-item { text-align: left; cursor: grab; }
.shortcuts { padding-left: 16px; margin: 0; line-height: 1.9; }
kbd {
  padding: 0 4px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #f8fafc;
  font-size: 11px;
}

.center { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.canvas-area { flex: 1; overflow: auto; padding: 24px; min-width: 0; }

/* ---------- page tabs ---------- */
.page-tabs {
  display: flex;
  gap: 4px;
  padding: 8px 12px 0;
  overflow-x: auto;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.page-tab {
  flex: 0 0 auto;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-radius: var(--radius) var(--radius) 0 0;
  border-bottom: 0;
  background: transparent;
  color: var(--muted);
}
.page-tab[aria-current="true"] { background: var(--surface); color: var(--text); font-weight: 600; }
.page-tab.add { border-style: dashed; color: var(--accent); }
.canvas-stage { position: relative; margin: 0 auto; }
.canvas {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: top left;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.08), 0 20px 40px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

/* ---------- editor element chrome ---------- */
.canvas .el { cursor: move; user-select: none; }
.canvas .el:hover { outline: 1px dashed #a5b4fc; }
.canvas .el.selected { outline: 2px solid var(--accent); outline-offset: 0; }
.canvas .el .editing {
  user-select: text;
  cursor: text;
  outline: 2px dashed #f59e0b;
  outline-offset: 2px;
}
.resize-handle {
  display: none;
  position: absolute;
  right: 0;
  bottom: 0;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: 2px solid #fff;
  border-radius: 3px;
  cursor: nwse-resize;
  z-index: 1;
}
.canvas .el.selected .resize-handle { display: block; }
.canvas.multi-select .el.selected .resize-handle { display: none; }
.canvas.multi-select .el.selected { outline-style: dashed; }
.marquee { position: absolute; border: 1px solid var(--accent); background: rgba(79, 70, 229, 0.08); }

/* ---------- grid & smart guides (overlays above all elements) ---------- */
.grid-layer, .guides-layer { position: absolute; inset: 0; pointer-events: none; }
.grid-layer {
  display: none;
  z-index: 2147483000;
  background-image:
    linear-gradient(to right, rgba(99, 102, 241, 0.22) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(99, 102, 241, 0.22) 1px, transparent 1px);
  background-size: var(--grid-size, 20px) var(--grid-size, 20px);
}
.canvas.show-grid .grid-layer { display: block; }
.guides-layer { z-index: 2147483001; }
.guide-line { position: absolute; background: #ec4899; }
.guide-spacing { position: absolute; background: #f97316; }
.guide-spacing span {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 0 0.4em;
  border-radius: 0.4em;
  background: #f97316;
  color: #fff;
  font-family: system-ui, sans-serif;
  line-height: 1.5;
  white-space: nowrap;
}

/* ---------- editor-only behaviour of interactive elements ---------- */
.canvas .el-embed iframe { pointer-events: none; } /* so embeds can be dragged; they work in the export */
.canvas .el-slideshow button { cursor: pointer; }

/* ---------- properties panel ---------- */
.panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.panel-header h2 { margin: 0; }
.panel-section { padding: 12px 0; border-top: 1px solid var(--border); }
.panel-section:first-of-type { border-top: 0; }
.field { display: grid; gap: 4px; margin-bottom: 10px; }
.field > span { font-size: 12px; color: var(--muted); }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 10px; }
.color-control { display: flex; align-items: center; gap: 6px; }
.color-control input[type="color"] { width: 40px; height: 30px; padding: 0 2px; border: 1px solid var(--border); border-radius: 6px; background: #fff; }
.color-none { font-size: 11px; color: var(--muted); }
.image-control { display: grid; gap: 4px; }
.image-control input { font-size: 12px; }
.button-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.checkbox-field { display: flex; align-items: center; gap: 8px; }
.checkbox-field > span { font-size: 13px; color: var(--text); }
textarea.code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; }
.link-control { display: grid; gap: 6px; }
.suffix-input { display: flex; align-items: center; gap: 4px; }
.suffix-input span { color: var(--muted); }
.items-control { display: grid; gap: 8px; }
.items-list { display: grid; gap: 8px; }
.item-row { display: grid; gap: 6px; padding: 8px; border: 1px solid var(--border); border-radius: var(--radius); background: #f8fafc; }
.item-header { display: flex; align-items: center; gap: 8px; }
.item-thumb { width: 56px; height: 40px; border-radius: 4px; object-fit: cover; flex: 0 0 auto; }
.item-thumb.empty { display: flex; align-items: center; justify-content: center; font-size: 10px; color: var(--muted);
  background: #e2e8f0; }
.item-tools { display: flex; gap: 4px; margin-left: auto; }
.layer-item { display: block; width: 100%; margin-bottom: 4px; text-align: left; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- status bar ---------- */
.statusbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 14px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
}
.statusbar-right { display: flex; gap: 14px; }
#status[data-tone="error"] { color: var(--danger); font-weight: 600; }

/* ---------- small screens: stack panels under the canvas ---------- */
@media (max-width: 900px) {
  body { height: auto; }
  .workspace { grid-template-columns: 1fr; }
  .palette { border-right: 0; border-bottom: 1px solid var(--border); }
  .palette-list { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .palette .shortcuts, .palette h2 + .palette-list + .muted + h2 { display: none; }
  .canvas-area { padding: 12px; }
  .panel { border-left: 0; border-top: 1px solid var(--border); }
}