/* ============================================
   whiteboard.css — Pizarra premium monocroma
   ============================================ */

/* Fill the editor scroll area completely (same trick as Chat IA) */
#editor-scroll.wb-active { overflow: hidden !important; }
#editor-scroll.wb-active #special-view { height: 100%; display: flex; flex-direction: column; }
#editor-scroll.wb-active .wb-editor-root,
#editor-scroll.wb-active .wb-list-root { flex: 1; min-height: 0; }

/* ─── Vista lista ──────────────────────────── */
.wb-list-root {
  padding: 32px 40px; max-width: 1200px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 18px;
  height: 100%; overflow-y: auto;
}
.wb-list-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding-bottom: 8px;
}
.wb-list-title {
  font-size: 32px; font-weight: 700; margin: 0; color: var(--text);
  letter-spacing: -0.6px;
}
.wb-search {
  width: 100%; padding: 11px 16px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg-2);
  color: var(--text); font-size: 14px; outline: none;
  transition: border-color 0.15s, background 0.15s;
}
.wb-search:focus { border-color: var(--text-3); background: var(--bg); }
.wb-search::placeholder { color: var(--text-3); }

.wb-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.wb-card {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 14px; overflow: hidden; cursor: pointer;
  display: flex; flex-direction: column;
  transition: border-color 0.15s, transform 0.18s ease, box-shadow 0.18s ease;
  position: relative;
}
.wb-card:hover {
  border-color: var(--text-3); transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.10), 0 2px 6px rgba(0,0,0,0.04);
}
.wb-thumb {
  height: 160px; background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; padding: 14px;
}
.wb-thumb-svg { width: 100%; height: 100%; color: var(--text); }
.wb-thumb-empty {
  color: var(--text-3); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.6px;
}
.wb-card-meta { padding: 14px 16px 8px; }
.wb-card-title {
  font-size: 14.5px; font-weight: 600; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.wb-card-sub {
  font-size: 11.5px; color: var(--text-3); margin-top: 4px;
  letter-spacing: 0.1px;
}
.wb-card-acts {
  display: flex; gap: 6px; padding: 0 14px 12px;
  opacity: 0; transition: opacity 0.18s ease;
}
.wb-card:hover .wb-card-acts { opacity: 1; }
.wb-card-act {
  font-size: 11.5px; padding: 5px 11px; border-radius: 7px;
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text-2); cursor: pointer; font-weight: 500;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.wb-card-act:hover { background: var(--bg-3); color: var(--text); border-color: var(--text-3); }
.wb-card-act.danger { color: #d92d20; border-color: rgba(217,45,32,0.2); }
.wb-card-act.danger:hover { background: rgba(217,45,32,0.08); border-color: rgba(217,45,32,0.4); }

.wb-empty {
  padding: 80px 20px; text-align: center; color: var(--text-3); font-size: 13px;
}

/* ─── Editor ───────────────────────────────── */
.wb-editor-root {
  height: 100%; display: flex; flex-direction: column;
  background: var(--bg); outline: none;
}
.wb-top {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 18px; border-bottom: 1px solid var(--border);
  flex-shrink: 0; background: var(--bg);
}
.wb-title-inp {
  flex: 1; border: none; background: transparent;
  font-size: 17px; font-weight: 600; color: var(--text);
  outline: none; padding: 6px 10px; border-radius: 6px;
  transition: background 0.15s;
  letter-spacing: -0.3px;
}
.wb-title-inp:hover, .wb-title-inp:focus { background: var(--bg-2); }
.wb-saved {
  font-size: 11px; color: var(--text-3); padding: 4px 10px;
  background: var(--bg-2); border-radius: 99px;
  letter-spacing: 0.3px; transition: opacity 0.3s;
  opacity: 0.5;
}
.wb-saved.flash { opacity: 1; color: var(--text); }
.wb-style-sel {
  font-size: 12px; padding: 6px 10px; border-radius: 7px;
  border: 1px solid var(--border); background: var(--bg-2);
  color: var(--text-2); cursor: pointer; outline: none;
}
.wb-style-sel:focus { border-color: var(--text-3); }

.wb-btn {
  padding: 7px 14px; border-radius: 8px; cursor: pointer;
  font-size: 13px; font-weight: 500;
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text); transition: background 0.12s, color 0.12s, transform 0.1s;
}
.wb-btn:hover { background: var(--bg-2); }
.wb-btn:active { transform: scale(0.97); }
.wb-btn-primary {
  background: var(--text); color: var(--bg); border-color: var(--text);
}
.wb-btn-primary:hover { opacity: 0.85; background: var(--text); }
.wb-btn-ghost { background: transparent; color: var(--text-2); }

/* Toolbar */
.wb-toolbar {
  display: flex; align-items: center; gap: 4px;
  padding: 10px 18px; border-bottom: 1px solid var(--border);
  background: var(--bg-2); flex-wrap: wrap; flex-shrink: 0;
}
.wb-tool {
  width: 34px; height: 34px; border-radius: 8px;
  border: 1px solid transparent; background: transparent;
  color: var(--text-2); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  transition: background 0.12s, color 0.12s, border-color 0.12s, transform 0.1s;
}
.wb-tool:hover { background: var(--bg); color: var(--text); }
.wb-tool:active { transform: scale(0.94); }
.wb-tool.active {
  background: var(--text); color: var(--bg); border-color: var(--text);
}
.wb-sep { width: 1px; height: 22px; background: var(--border); margin: 0 8px; }

/* Canvas */
.wb-canvas-wrap {
  flex: 1; min-height: 0; position: relative; overflow: hidden; background: var(--bg);
}
.wb-svg {
  display: block; width: 100%; height: 100%;
  touch-action: none;
  user-select: none; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none;
  -webkit-user-drag: none; -webkit-touch-callout: none;
  color: var(--text);
}
.wb-svg, .wb-svg * {
  user-select: none !important; -webkit-user-select: none !important;
  -webkit-user-drag: none !important;
}
.wb-svg text {
  font-family: 'Caveat', 'Segoe Print', 'Comic Sans MS', cursive;
  font-size: 16px;
  pointer-events: none;
}

/* Grid */
.wb-grid-layer { opacity: 1; pointer-events: none; }
.wb-grid-layer line {
  stroke: var(--border); stroke-width: 1;
}
[data-theme="dark"] .wb-grid-layer line { opacity: 0.4; }

/* Selection */
.wb-sel-rect {
  pointer-events: none;
  stroke-dasharray: 4 3;
  opacity: 0.85;
}
.wb-handle {
  fill: var(--bg);
  stroke: currentColor;
  stroke-width: 1.5;
  cursor: pointer;
  transition: fill 0.12s;
}
.wb-handle:hover { fill: currentColor; }

/* Live layer (ghost during drag/draw) */
.wb-live { pointer-events: none; }

/* Inline text editor */
.wb-text-edit {
  border: 2px solid var(--text); border-radius: 6px;
  padding: 6px 8px; background: var(--bg); color: var(--text);
  font-family: 'Caveat', cursive; outline: none; resize: none;
  z-index: 10000; box-shadow: 0 8px 24px rgba(0,0,0,0.20), 0 0 0 4px rgba(0,0,0,0.04);
  line-height: 1.35;
}

/* Properties panel (contextual) */
.wb-props {
  position: absolute; right: 16px; top: 16px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.10), 0 2px 6px rgba(0,0,0,0.04);
  display: flex; flex-direction: column; gap: 10px;
  min-width: 180px; z-index: 5;
  animation: wb-props-in 0.16s ease-out;
}
@keyframes wb-props-in {
  from { opacity: 0; transform: translateX(8px); }
  to { opacity: 1; transform: translateX(0); }
}
.wb-props.hidden { display: none; }
.wb-props-title {
  font-size: 12px; font-weight: 600; color: var(--text);
  text-transform: uppercase; letter-spacing: 0.6px;
}
.wb-props-row { display: flex; align-items: center; gap: 8px; }
.wb-props-label { font-size: 11.5px; color: var(--text-3); flex: 1; }
.wb-props-sel {
  font-size: 12px; padding: 4px 8px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--bg-2);
  color: var(--text); outline: none;
}
.wb-props-num { width: 72px; flex: 0 0 auto; text-align: right; }
.wb-props-num:focus { border-color: var(--text-3); }

/* ─── Embed ────────────────────────────────── */
.wb-embed {
  border: 1px solid var(--border); border-radius: 14px;
  background: var(--bg-2); overflow: hidden;
  display: flex; flex-direction: column; min-height: 240px;
}
.wb-embed-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.wb-embed-title {
  font-size: 13.5px; font-weight: 600; color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
.wb-embed-title::before {
  content: ''; display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--text-3);
}
.wb-embed-acts { display: flex; gap: 6px; }
.wb-embed-preview {
  flex: 1; min-height: 200px; display: flex;
  align-items: center; justify-content: center; padding: 16px;
  background:
    radial-gradient(circle, rgba(120,120,120,0.04) 1px, transparent 1px) 0 0/16px 16px;
}
[data-theme="dark"] .wb-embed-preview {
  background: radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px) 0 0/16px 16px;
}
.wb-embed-preview .wb-thumb-svg {
  width: 100%; height: 100%; max-height: 320px; color: var(--text);
}
.wb-embed-empty {
  padding: 32px; text-align: center; color: var(--text-3); font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  flex: 1;
}

/* Empty state for new embed */
.wb-embed-empty-state {
  padding: 28px 24px; display: flex; flex-direction: column; gap: 12px;
  align-items: center; justify-content: center; text-align: center;
}
.wb-embed-empty-title {
  font-size: 16px; font-weight: 600; color: var(--text);
}
.wb-embed-empty-sub {
  font-size: 12.5px; color: var(--text-3); max-width: 320px; line-height: 1.5;
}
.wb-embed-empty-row {
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 4px;
}
.wb-embed-select {
  padding: 7px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text); font-size: 13px;
  outline: none;
}
.wb-embed-select:focus { border-color: var(--text-3); }

.wb-block-wrap { width: 100%; }


/* ─── Sub-toolbar (paleta + grosor + opciones) ─── */
.wb-subbar {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 18px; border-bottom: 1px solid var(--border);
  background: var(--bg); flex-wrap: wrap; flex-shrink: 0;
}
.wb-palette {
  display: flex; gap: 4px; align-items: center;
}
.wb-color {
  width: 22px; height: 22px; border-radius: 50%;
  border: 2px solid var(--border); cursor: pointer; padding: 0;
  transition: transform 0.12s, border-color 0.12s, box-shadow 0.12s;
  position: relative;
}
.wb-color:hover { transform: scale(1.18); }
.wb-color.active {
  border-color: var(--text); transform: scale(1.16);
  box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--text);
}

.wb-size-wrap {
  display: flex; align-items: center; gap: 8px;
}
.wb-size-lbl {
  font-size: 11.5px; color: var(--text-3); letter-spacing: 0.3px;
}
.wb-size-slider {
  width: 100px; height: 4px;
  -webkit-appearance: none; appearance: none;
  background: var(--border); border-radius: 99px; outline: none; cursor: pointer;
}
.wb-size-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--text); border: none; cursor: pointer;
  transition: transform 0.12s;
}
.wb-size-slider::-webkit-slider-thumb:hover { transform: scale(1.18); }
.wb-size-slider::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--text); border: none; cursor: pointer;
}
.wb-size-val {
  font-size: 11.5px; color: var(--text);
  font-variant-numeric: tabular-nums; min-width: 16px;
}

.wb-pill {
  font-size: 12px; padding: 5px 12px; border-radius: 99px;
  border: 1px solid var(--border); background: var(--bg-2);
  color: var(--text-2); cursor: pointer;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.wb-pill:hover { background: var(--bg-3); color: var(--text); border-color: var(--text-3); }
.wb-pill.active {
  background: var(--text); color: var(--bg); border-color: var(--text);
}

/* ─── Background patterns ─── */
.wb-canvas-wrap.bg-none { background: var(--bg); }
.wb-canvas-wrap.bg-dots {
  background-color: var(--bg);
  background-image: radial-gradient(circle, var(--text-3) 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: 0 0;
}
[data-theme="dark"] .wb-canvas-wrap.bg-dots {
  background-image: radial-gradient(circle, rgba(255,255,255,0.08) 1px, transparent 1px);
}
.wb-canvas-wrap.bg-lines {
  background-color: var(--bg);
  background-image: linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 100% 28px;
}
.wb-canvas-wrap.bg-grid {
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 24px 24px;
}
/* Cornell notes: horizontal rule + cue column + summary line */
.wb-canvas-wrap.bg-cornell {
  background-color: var(--bg);
  background-image:
    linear-gradient(to bottom, var(--border) 1px, transparent 1px),
    linear-gradient(to right, transparent 28%, rgba(224,133,125,0.55) 28%, rgba(224,133,125,0.55) calc(28% + 1.5px), transparent calc(28% + 1.5px));
  background-size: 100% 28px, 100% 100%;
}
/* Engineering grid: fine 12px grid + bold 60px grid */
.wb-canvas-wrap.bg-engineering {
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, rgba(120,160,200,0.18) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(120,160,200,0.18) 1px, transparent 1px),
    linear-gradient(to right, rgba(90,130,180,0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(90,130,180,0.35) 1px, transparent 1px);
  background-size: 12px 12px, 12px 12px, 60px 60px, 60px 60px;
}

/* ─── Props panel mejor posicionado (bottom-right, no tape) ─── */
.wb-props {
  position: absolute; right: 16px; bottom: 16px;
  top: auto !important;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 14px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.14), 0 2px 6px rgba(0,0,0,0.04);
  display: flex; flex-direction: column; gap: 10px;
  min-width: 200px; max-width: 240px; z-index: 5;
  pointer-events: auto;
  animation: wb-props-slide-in 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes wb-props-slide-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* GPU compositing on world layer for smooth pan/zoom */
.wb-world, .wb-grid-layer, .wb-live, .wb-selection {
  will-change: transform;
}
.wb-svg { transform: translateZ(0); }


/* ============================================
   Embed bloque whiteboard — diseño premium
   ============================================ */
.wb-embed {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-2);
  overflow: hidden;
  display: flex; flex-direction: column;
  min-height: 220px;
  transition: border-color 140ms ease, box-shadow 140ms ease;
}
.wb-embed:hover {
  border-color: color-mix(in srgb, var(--text) 22%, var(--border));
  box-shadow: 0 8px 24px -16px color-mix(in srgb, var(--text) 35%, transparent);
}
.wb-embed-compact { min-height: 160px; }
.wb-embed-wide { min-height: 360px; }

/* Header */
.wb-embed-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.wb-embed-head-left {
  display: flex; align-items: center; gap: 10px; min-width: 0;
}
.wb-embed-title {
  font-size: 13.5px; font-weight: 600; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 280px;
}
.wb-embed-title::before { content: none !important; }
.wb-embed-meta {
  font-size: 11.5px; color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

/* Preview */
.wb-embed-preview {
  flex: 1; min-height: 160px; padding: 18px;
  display: flex; align-items: center; justify-content: center;
  cursor: zoom-in;
  position: relative;
}
.wb-embed-bg-paper .wb-embed-preview {
  background:
    linear-gradient(180deg, rgba(120,120,120,0.025) 0%, transparent 100%),
    var(--bg);
}
.wb-embed-bg-dots .wb-embed-preview {
  background:
    radial-gradient(circle at center, rgba(120,120,120,0.10) 1px, transparent 1px) 0 0/16px 16px,
    var(--bg);
}
.wb-embed-bg-grid .wb-embed-preview {
  background:
    linear-gradient(rgba(120,120,120,0.07) 1px, transparent 1px) 0 0/24px 24px,
    linear-gradient(90deg, rgba(120,120,120,0.07) 1px, transparent 1px) 0 0/24px 24px,
    var(--bg);
}
.wb-embed-bg-plain .wb-embed-preview {
  background: var(--bg);
}
[data-theme="dark"] .wb-embed-bg-dots .wb-embed-preview {
  background:
    radial-gradient(circle at center, rgba(255,255,255,0.08) 1px, transparent 1px) 0 0/16px 16px,
    var(--bg);
}
[data-theme="dark"] .wb-embed-bg-grid .wb-embed-preview {
  background:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px) 0 0/24px 24px,
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px) 0 0/24px 24px,
    var(--bg);
}
.wb-embed-preview .wb-thumb-svg {
  width: 100%; height: 100%; max-height: 360px; color: var(--text);
  filter: drop-shadow(0 1px 2px color-mix(in srgb, var(--text) 8%, transparent));
}

/* Empty / broken state */
.wb-embed-empty,
.wb-embed-broken {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; padding: 32px 24px; color: var(--text-3); text-align: center;
  font-size: 13px;
}
.wb-embed-broken-title {
  font-weight: 600; color: var(--text); font-size: 14px;
}
.wb-embed-broken-sub { font-size: 12px; color: var(--text-3); }
.wb-embed-broken { background: color-mix(in srgb, var(--text) 4%, var(--bg-2)); }

/* Toolbar inferior */
.wb-embed-toolbar {
  display: flex; gap: 6px; flex-wrap: wrap;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  background: var(--bg);
  align-items: center;
}
.wb-embed-toolbar .wb-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 11px;
  font-size: 12px;
  border-radius: 8px;
}
.wb-embed-toolbar .wb-btn .wb-icon {
  width: 14px; height: 14px;
}

/* Iconos genéricos del embed */
.wb-icon { display: inline-block; width: 16px; height: 16px; flex-shrink: 0; }
.wb-icon-canvas-large { width: 32px; height: 32px; color: var(--text-3); }

/* Popover de exportación */
.wb-embed-export-pop {
  position: fixed; z-index: 9000;
  display: flex; flex-direction: column; gap: 2px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 4px;
  box-shadow: 0 16px 40px -12px rgba(0,0,0,0.25);
  min-width: 140px;
}
.wb-embed-export-item {
  justify-content: flex-start !important;
  text-align: left;
  padding: 8px 12px !important;
}

/* ════════════════════════════════════════════════
   PRO whiteboard: brush panel, layers panel, lasso
   ════════════════════════════════════════════════ */

/* ─── Brush popover ─── */
.wb-brush-wrap { position: relative; display: inline-flex; }
.wb-brush-btn { white-space: nowrap; }
.wb-brush-panel {
  position: absolute; top: calc(100% + 8px); left: 0;
  width: 260px; z-index: 60;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 14px; padding: 12px;
  box-shadow: 0 18px 48px rgba(0,0,0,0.22), 0 2px 8px rgba(0,0,0,0.08);
  display: flex; flex-direction: column; gap: 10px;
}
[data-theme="dark"] .wb-brush-panel {
  background: rgba(28,30,38,0.96);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
}
.wb-brush-panel.hidden { display: none; }
.wb-brush-preview {
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg-2); overflow: hidden; height: 56px;
}
.wb-brush-preview-svg { display: block; color: var(--text); }
.wb-brush-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px;
}
.wb-brush-opt {
  font-size: 12.5px; padding: 7px 8px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-2);
  color: var(--text); cursor: pointer; text-align: left;
  transition: transform 0.12s ease, border-color 0.12s ease, background 0.12s ease;
}
.wb-brush-opt:hover { transform: translateY(-1px); border-color: var(--text-3); }
.wb-brush-opt:active { transform: scale(0.98); }
.wb-brush-opt.active {
  border-color: #6366f1; background: rgba(99,102,241,0.14);
  box-shadow: 0 0 0 1px rgba(99,102,241,0.4) inset;
}
.wb-brush-row { display: flex; align-items: center; gap: 8px; }
.wb-brush-row-lbl { font-size: 11.5px; color: var(--text-3); flex: 0 0 96px; }
.wb-brush-slider { flex: 1; }

/* ─── Layers panel ─── */
.wb-layers-panel {
  position: absolute; right: 16px; top: 16px;
  width: 248px; max-height: 70%; overflow: auto; z-index: 6;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 14px; padding: 12px;
  box-shadow: 0 18px 48px rgba(0,0,0,0.2), 0 2px 8px rgba(0,0,0,0.06);
}
[data-theme="dark"] .wb-layers-panel {
  background: rgba(28,30,38,0.96);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
}
.wb-layers-panel.hidden { display: none; }
.wb-layers-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}
.wb-layers-head span { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.wb-layers-list { display: flex; flex-direction: column; gap: 4px; }
.wb-layer-row {
  display: flex; align-items: center; gap: 4px;
  padding: 5px 6px; border-radius: 8px; cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.12s ease, transform 0.12s ease, border-color 0.12s ease;
}
.wb-layer-row:hover { background: var(--bg-2); transform: translateX(1px); }
.wb-layer-row.active { border-color: var(--text); background: rgba(128,128,128,0.14); }
.wb-layer-name { flex: 1; font-size: 12.5px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.wb-layer-name-inp { flex: 1; font-size: 12.5px; padding: 2px 4px; border: 1px solid var(--border); border-radius: 5px; background: var(--bg); color: var(--text); }
.wb-layer-icon {
  display: inline-flex; align-items: center; justify-content: center;
  border: none; background: transparent; cursor: pointer; color: var(--text);
  font-size: 13px; line-height: 1; padding: 3px; border-radius: 5px;
  opacity: 0.7; transition: opacity 0.12s ease, transform 0.12s ease;
}
.wb-layer-icon svg { display: block; }
.wb-layer-icon:hover { opacity: 1; transform: scale(1.12); background: var(--bg-2); }
.wb-layer-icon.is-on { opacity: 1; color: var(--text); }
.wb-layer-icon.danger:hover { background: var(--bg-2); }

/* ─── Lasso path ─── */
.wb-lasso-path { animation: wb-lasso-dash 0.6s linear infinite; }
@keyframes wb-lasso-dash { to { stroke-dashoffset: -18; } }

/* ─── Premium micro-interactions ─── */
.wb-tool { transition: transform 0.12s ease, background 0.14s ease, box-shadow 0.14s ease; }
.wb-tool:hover { transform: translateY(-1px); }
.wb-tool:active { transform: scale(0.96); }
.wb-tool.active {
  box-shadow: 0 0 0 1px rgba(99,102,241,0.5) inset, 0 2px 10px rgba(99,102,241,0.25);
}
.wb-anim-in { animation: wbBrushPanelIn 0.18s cubic-bezier(0.16, 1, 0.3, 1); }
@keyframes wbBrushPanelIn {
  from { opacity: 0; transform: translateY(-6px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.wb-layers-panel.wb-anim-in { animation: wbLayerPanelIn 0.2s cubic-bezier(0.16, 1, 0.3, 1); }
@keyframes wbLayerPanelIn {
  from { opacity: 0; transform: translateX(12px); }
  to { opacity: 1; transform: translateX(0); }
}
.wb-sel-rect { animation: wbSelGlow 1.8s ease-in-out infinite; }
@keyframes wbSelGlow {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 0.5; }
}

/* Mobile: panels fit small screens */
@media (max-width: 720px) {
  .wb-brush-panel { width: min(280px, 92vw); }
  .wb-layers-panel { width: min(240px, 86vw); right: 8px; top: 8px; }
}

/* Reduced motion: kill long/looping animations */
@media (prefers-reduced-motion: reduce) {
  .wb-lasso-path, .wb-sel-rect { animation: none; }
  .wb-anim-in, .wb-layers-panel.wb-anim-in,
  .wb-props, .wb-tool { animation: none !important; transition: none !important; }
}

/* ════════════════════════════════════════════════
   wbpro2 — confirm modal, layer drag, image handles,
            paper mode, refined brush panel
   ════════════════════════════════════════════════ */

/* Tighter, more premium brush panel */
.wb-brush-panel { width: 248px; padding: 11px; gap: 9px; border-radius: 16px; }
.wb-brush-opt { padding: 6px 8px; font-size: 12px; }
.wb-brush-row-lbl { flex: 0 0 88px; }
/* Disabled sliders (profile doesn't use that dimension) */
.wb-brush-row.is-disabled { opacity: 0.4; }
.wb-brush-row.is-disabled .wb-brush-slider { pointer-events: none; }

/* ─── Reusable confirm modal ─── */
.wb-modal-overlay {
  position: fixed; inset: 0; z-index: 100000;
  display: flex; align-items: center; justify-content: center;
  background: rgba(10, 12, 18, 0.5);
  backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
  animation: wbModalOverlayIn 0.14s ease-out;
}
.wb-modal-overlay.wb-modal-out { animation: wbModalOverlayOut 0.14s ease-in forwards; }
@keyframes wbModalOverlayIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes wbModalOverlayOut { from { opacity: 1; } to { opacity: 0; } }
.wb-modal-card {
  width: min(380px, 92vw);
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 16px;
  padding: 20px 20px 16px; text-align: left;
  box-shadow: 0 24px 64px rgba(0,0,0,0.3), 0 4px 14px rgba(0,0,0,0.12);
  animation: wbModalCardIn 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-theme="dark"] .wb-modal-card {
  background: rgba(30,32,40,0.98);
  backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4);
}
@keyframes wbModalCardIn { from { opacity: 0; transform: translateY(10px) scale(0.97); } to { opacity: 1; transform: none; } }
.wb-modal-title { margin: 0 0 8px; font-size: 16px; font-weight: 650; }
.wb-modal-msg { margin: 0 0 18px; font-size: 13.5px; color: var(--text-2, var(--text-3)); line-height: 1.5; }
.wb-modal-actions { display: flex; justify-content: flex-end; gap: 10px; }
.wb-modal-btn {
  padding: 8px 16px; border-radius: 9px; font-size: 13px; font-weight: 550;
  cursor: pointer; border: 1px solid var(--border); background: var(--bg-2); color: var(--text);
  transition: transform 0.12s ease, background 0.12s ease, box-shadow 0.12s ease;
}
.wb-modal-btn:hover { transform: translateY(-1px); }
.wb-modal-btn:active { transform: scale(0.97); }
.wb-modal-cancel:focus-visible { outline: 2px solid var(--text-3); outline-offset: 2px; }
.wb-modal-danger {
  background: #d92d20; border-color: #d92d20; color: #fff;
}
.wb-modal-danger:hover { background: #b91c1c; box-shadow: 0 4px 14px rgba(217,45,32,0.35); }
.wb-modal-ok { background: var(--text); color: var(--bg); border-color: var(--text); }

/* ─── Layer drag handle + DnD states ─── */
.wb-layer-handle { cursor: grab; opacity: 0.5; font-size: 13px; padding: 0 2px; user-select: none; }
.wb-layer-row:hover .wb-layer-handle { opacity: 0.85; }
.wb-layer-row.wb-layer-dragging { opacity: 0.5; }
.wb-layer-row.wb-layer-over { box-shadow: 0 -2px 0 0 var(--text) inset, 0 2px 0 0 var(--text) inset; background: var(--bg-2); }

/* ─── Paper mode (finite sheet over the canvas) ─── */
.wb-canvas-wrap.paper-mode { background: var(--bg) !important; }
.wb-paper-sheet {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 10px 40px rgba(0,0,0,0.28), 0 2px 8px rgba(0,0,0,0.12);
  pointer-events: none; z-index: 0; border-radius: 2px;
}
.wb-paper-sheet.light { background: #ffffff; }
.wb-paper-sheet.dark { background: #1a1c22; }

/* Mobile sizing */
@media (max-width: 720px) {
  .wb-brush-panel { width: min(260px, 92vw); }
  .wb-modal-card { width: min(340px, 94vw); }
}
@media (prefers-reduced-motion: reduce) {
  .wb-modal-overlay, .wb-modal-card { animation: none !important; }
}

/* ─── Equation editor panel (live preview + examples) ─── */
.wb-eq-panel {
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 10px; box-shadow: 0 16px 44px rgba(0,0,0,0.28), 0 2px 8px rgba(0,0,0,0.12);
}
[data-theme="dark"] .wb-eq-panel {
  background: rgba(28,30,38,0.98);
  backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4);
}
.wb-eq-preview {
  min-height: 40px; display: flex; align-items: center; justify-content: center;
  padding: 8px; margin-bottom: 8px; border-radius: 8px;
  background: var(--bg-2); border: 1px solid var(--border);
  font-size: 18px; overflow-x: auto;
}
.wb-eq-edit {
  border: 1px solid var(--border) !important; border-radius: 8px !important;
  background: var(--bg-2) !important; color: var(--text) !important;
}
.wb-eq-examples { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.wb-eq-chip {
  font-size: 11.5px; font-family: ui-monospace, monospace;
  padding: 4px 8px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--border); background: var(--bg); color: var(--text-2, var(--text));
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.wb-eq-chip:hover { transform: translateY(-1px); border-color: var(--text-3); }
@media (prefers-reduced-motion: reduce) { .wb-eq-chip { transition: none; } }

/* ════════════════════════════════════════════════
   wbpro3 — patterns ON the paper sheet (paper mode),
            auto color swatch
   ════════════════════════════════════════════════ */

/* Paper sheet carries the pattern in paper mode (not the whole canvas). */
.wb-paper-sheet.bg-none { background-image: none; }
.wb-paper-sheet.bg-dots {
  background-image: radial-gradient(circle, #c2c2c2 1.1px, transparent 1.1px);
  background-size: 20px 20px;
}
.wb-paper-sheet.dark.bg-dots {
  background-image: radial-gradient(circle, rgba(255,255,255,0.18) 1.1px, transparent 1.1px);
}
.wb-paper-sheet.bg-lines {
  background-image: linear-gradient(to bottom, #d6d6d6 1px, transparent 1px);
  background-size: 100% 28px;
}
.wb-paper-sheet.dark.bg-lines {
  background-image: linear-gradient(to bottom, rgba(255,255,255,0.16) 1px, transparent 1px);
}
.wb-paper-sheet.bg-grid {
  background-image:
    linear-gradient(to right, #d6d6d6 1px, transparent 1px),
    linear-gradient(to bottom, #d6d6d6 1px, transparent 1px);
  background-size: 24px 24px;
}
.wb-paper-sheet.dark.bg-grid {
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.14) 1px, transparent 1px);
}
.wb-paper-sheet.bg-cornell {
  background-image:
    linear-gradient(to bottom, #d6d6d6 1px, transparent 1px),
    linear-gradient(to right, transparent 28%, rgba(224,133,125,0.55) 28%, rgba(224,133,125,0.55) calc(28% + 1.5px), transparent calc(28% + 1.5px));
  background-size: 100% 28px, 100% 100%;
}
.wb-paper-sheet.bg-engineering {
  background-image:
    linear-gradient(to right, rgba(120,160,200,0.18) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(120,160,200,0.18) 1px, transparent 1px),
    linear-gradient(to right, rgba(90,130,180,0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(90,130,180,0.35) 1px, transparent 1px);
  background-size: 12px 12px, 12px 12px, 60px 60px, 60px 60px;
}
/* Neutral canvas backdrop while in paper mode. */
.wb-canvas-wrap.paper-mode { background: var(--bg); }

/* Auto color swatch: a small "A" chip with a half-dark/half-light look. */
.wb-color.wb-color-auto {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; color: var(--text);
  background: linear-gradient(135deg, #111 50%, #f4f4f5 50%);
}
.wb-color.wb-color-auto.active { box-shadow: 0 0 0 2px #6366f1; }

/* ════════════════════════════════════════════════
   wbpro6 — canvas tone (Light/Dark paper applies even
            in infinite mode)
   ════════════════════════════════════════════════ */
.wb-canvas-wrap.tone-light { background-color: #ffffff !important; }
.wb-canvas-wrap.tone-dark  { background-color: #1a1c22 !important; }
/* Override the high-specificity liquid-glass rule
   (html[data-visual] ... .wb-canvas-wrap { background: var(--bg) !important }). */
html[data-visual] .wb-canvas-wrap.tone-light,
html .wb-canvas-wrap.tone-light { background: #ffffff !important; }
html[data-visual] .wb-canvas-wrap.tone-dark,
html .wb-canvas-wrap.tone-dark { background: #1a1c22 !important; }
/* When a tone is forced, dot/grid/line patterns use neutral greys so they
   stay visible on the forced background (independent of app theme). */
.wb-canvas-wrap.tone-light.bg-dots  { background-image: radial-gradient(circle, #c8c8c8 1px, transparent 1px) !important; }
.wb-canvas-wrap.tone-light.bg-lines { background-image: linear-gradient(to bottom, #dadada 1px, transparent 1px) !important; }
.wb-canvas-wrap.tone-light.bg-grid  { background-image: linear-gradient(to right,#dadada 1px,transparent 1px),linear-gradient(to bottom,#dadada 1px,transparent 1px) !important; }
.wb-canvas-wrap.tone-dark.bg-dots   { background-image: radial-gradient(circle, rgba(255,255,255,0.12) 1px, transparent 1px) !important; }
.wb-canvas-wrap.tone-dark.bg-lines  { background-image: linear-gradient(to bottom, rgba(255,255,255,0.10) 1px, transparent 1px) !important; }
.wb-canvas-wrap.tone-dark.bg-grid   { background-image: linear-gradient(to right,rgba(255,255,255,0.10) 1px,transparent 1px),linear-gradient(to bottom,rgba(255,255,255,0.10) 1px,transparent 1px) !important; }

/* ════════════════════════════════════════════════
   wbpro7 — paper mode: only the sheet is prominent.
   The area AROUND the sheet is a distinct neutral grey
   (independent of theme/liquid-glass) so the A4/Letter
   sheet reads as a real page, never "superimposed".
   ════════════════════════════════════════════════ */
html .wb-canvas-wrap.paper-mode,
html[data-visual] .wb-canvas-wrap.paper-mode {
  background: #2a2c31 !important;            /* desk grey behind the sheet */
  background-image: none !important;
}
html[data-theme="light"] .wb-canvas-wrap.paper-mode,
html[data-visual][data-theme="light"] .wb-canvas-wrap.paper-mode {
  background: #e7e8ea !important;
}
/* The sheet itself: clear edge + shadow so it stands out from the desk. */
.wb-canvas-wrap.paper-mode .wb-paper-sheet {
  box-shadow: 0 12px 48px rgba(0,0,0,0.45), 0 2px 10px rgba(0,0,0,0.30) !important;
  border: 1px solid rgba(0,0,0,0.18);
  z-index: 0;
}
.wb-paper-sheet.light { background: #ffffff !important; border-color: rgba(0,0,0,0.12); }
.wb-paper-sheet.dark  { background: #15171c !important; border-color: rgba(255,255,255,0.10); }