* { box-sizing: border-box; }

:root {
  --bg: #eef1f5;
  --panel: #ffffff;
  --border: #d8dee6;
  --text: #15202b;
  --muted: #5f6b78;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #eff6ff;
  --success: #059669;
  --inspector-w: 260px;
  --loupe-size: 180px;
}

html, body {
  margin: 0;
  height: 100%;
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
}

body { display: flex; }

/* ---------- левая панель ---------- */
#panel {
  width: 320px;
  flex: 0 0 320px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 18px 16px 24px;
  overflow-y: auto;
  height: 100vh;
}

.panel-head h1 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 4px;
  letter-spacing: -0.02em;
}

#panel .sub {
  color: var(--muted);
  font-size: 12px;
  margin: 0 0 16px;
  line-height: 1.4;
}

#drop {
  border: 2px dashed #b8c4d4;
  border-radius: 12px;
  padding: 24px 14px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: #fafbfc;
}

#drop span { color: var(--muted); font-size: 12px; }
#drop:hover, #drop.over, #drop:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
  outline: none;
}

.quick-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-bottom: 14px;
}

.preset-chip {
  padding: 7px 6px;
  font-size: 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  transition: .12s;
}

.preset-chip:hover { border-color: var(--accent); color: var(--accent); }
.preset-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

details { margin-top: 8px; }
summary {
  cursor: pointer;
  font-weight: 600;
  margin-bottom: 8px;
  user-select: none;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin: 8px 0;
}

.row span { font-size: 13px; }
.row select {
  flex: 1;
  max-width: 170px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  font: inherit;
}

.row.check { justify-content: flex-start; gap: 8px; }

.slider { display: block; margin: 10px 0; }
.slider span { display: block; font-size: 13px; margin-bottom: 4px; }
.slider b { color: var(--accent); font-variant-numeric: tabular-nums; }
.slider input { width: 100%; accent-color: var(--accent); }

.actions { display: flex; gap: 8px; margin-top: 16px; }

button {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  font: inherit;
  transition: border-color .12s, background .12s, color .12s;
}

button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
button:disabled { opacity: .42; cursor: default; }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
button.primary:hover:not(:disabled) {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
}

button.ghost {
  flex: 1;
  background: #f8fafc;
  font-size: 12px;
}

button.ghost.small {
  flex: none;
  padding: 4px 8px;
  font-size: 11px;
}

#stats {
  margin-top: 14px;
  font-size: 12px;
  color: var(--muted);
  white-space: pre-line;
  line-height: 1.5;
}

.code-panel { margin-top: 14px; }
.code-panel textarea {
  width: 100%;
  min-height: 120px;
  max-height: 220px;
  resize: vertical;
  font: 11px/1.4 ui-monospace, Consolas, monospace;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  background: #f8fafc;
  color: #334155;
}

/* ---------- основная область ---------- */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-width: 0;
}

#toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}

#toolbar .group { display: flex; align-items: center; gap: 4px; }
#toolbar button { padding: 6px 11px; font-size: 13px; }

#modes button.active,
#loupeBtn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

#zoomLabel {
  min-width: 54px;
  text-align: center;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
}

#workspace {
  flex: 1;
  display: flex;
  min-height: 0;
}

#viewer {
  flex: 1;
  position: relative;
  overflow: hidden;
  cursor: grab;
  --sq: 14px;
  background:
    repeating-conic-gradient(#e4e8ec 0% 25%, #f7f9fb 0% 50%)
    0 0 / var(--sq) var(--sq);
}

#viewer.panning { cursor: grabbing; }
#viewer.loupe-on { cursor: crosshair; }

#stage {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
}

#stage img,
#stage .layer,
#stage .layer svg {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}

#stage img.pixelated { image-rendering: pixelated; }

/* подсветка выбранных путей */
#svgLayer path.path-hl,
#wireLayer path.path-hl {
  stroke: #f97316 !important;
  stroke-width: 2.5px !important;
  stroke-opacity: 1 !important;
  fill-opacity: 0.55 !important;
  vector-effect: non-scaling-stroke;
}

#wireLayer path {
  fill: none;
  stroke: #22d3ee;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  stroke-linejoin: round;
}

/* сравнение до/после */
#viewer.mode-compare #rasterLayer { display: block; z-index: 1; }
#viewer.mode-compare #svgLayer {
  display: block;
  z-index: 2;
  clip-path: inset(0 0 0 var(--split, 50%));
}

#compareHandle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  z-index: 10;
  pointer-events: none;
  transform: translateX(-50%);
}

#compareHandle .handle-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  margin-left: -1px;
  background: var(--accent);
  box-shadow: 0 0 0 1px rgba(255,255,255,.8);
}

#compareHandle .handle-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 32px;
  height: 32px;
  margin: -16px 0 0 -16px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
  pointer-events: auto;
  cursor: ew-resize;
}

#compareHandle::before,
#compareHandle::after {
  content: attr(data-label-left);
  position: absolute;
  top: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  color: #fff;
  background: rgba(15, 23, 42, .55);
  padding: 3px 8px;
  border-radius: 4px;
  pointer-events: none;
}

#compareHandle::before {
  content: 'ОРИГИНАЛ';
  left: -90px;
}

#compareHandle::after {
  content: 'SVG';
  right: -52px;
  left: auto;
}

/* лупа */
#loupe {
  position: fixed;
  width: var(--loupe-size);
  height: var(--loupe-size);
  border-radius: 50%;
  border: 3px solid var(--accent);
  box-shadow: 0 8px 28px rgba(0,0,0,.28);
  overflow: hidden;
  pointer-events: none;
  z-index: 1000;
  background: #fff;
}

#loupeCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

#loupe .loupe-label {
  position: absolute;
  right: 8px;
  bottom: 6px;
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  background: rgba(0,0,0,.45);
  padding: 2px 6px;
  border-radius: 4px;
}

#placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  pointer-events: none;
  text-align: center;
  padding: 20px;
}

#placeholder .ph-icon {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: 10px;
}

#placeholder .hint {
  font-size: 12px;
  margin-top: 8px;
  max-width: 360px;
}

#spinner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(255,255,255,.6);
  font-weight: 600;
  z-index: 20;
}

.loader {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 3px solid #c9d4e2;
  border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.hidden { display: none !important; }

/* ---------- инспектор слоёв ---------- */
#inspector {
  width: var(--inspector-w);
  flex: 0 0 var(--inspector-w);
  background: var(--panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.inspector-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 12px 4px;
}

.inspector-head h2 {
  margin: 0;
  font-size: 14px;
}

.inspector-hint {
  margin: 0 12px 8px;
  font-size: 11px;
  color: var(--muted);
}

#layerList {
  flex: 1;
  overflow-y: auto;
  padding: 0 8px 12px;
}

.layer-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px;
  margin-bottom: 4px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: #f8fafc;
  cursor: pointer;
  text-align: left;
  font: inherit;
}

.layer-item:hover { border-color: var(--border); }
.layer-item.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.layer-swatch {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 1px solid rgba(0,0,0,.12);
  flex-shrink: 0;
}

.layer-meta {
  flex: 1;
  min-width: 0;
}

.layer-meta strong {
  display: block;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-meta span {
  font-size: 11px;
  color: var(--muted);
}

@media (max-width: 1100px) {
  #inspector {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 15;
    box-shadow: -4px 0 20px rgba(0,0,0,.08);
  }
}

@media (max-width: 820px) {
  body { flex-direction: column; }
  #panel {
    width: 100%;
    flex: none;
    height: auto;
    max-height: 42vh;
  }
  #main { height: auto; flex: 1; min-height: 55vh; }
  #workspace { flex-direction: column; }
  #inspector {
    position: static;
    width: 100%;
    flex: none;
    max-height: 180px;
    box-shadow: none;
    border-left: none;
    border-top: 1px solid var(--border);
  }
}