:root {
  --panel-bg: #1B1B1E;
  --panel-bg-2: #202024;
  --panel-border: #2E2E33;
  --text-hi: #EDEBE5;
  --text-lo: #9A968E;
  --text-faint: #6C6963;
  --accent: #D9A441;
  --accent-2: #6C8DB5;
  --danger: #C2564B;
  --stage-frame: #232326;
  --row-hover: #26262B;
  --input-bg: #17171A;
  --input-border: #38383E;
  --radius: 6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--stage-frame);
  color: var(--text-hi);
  font-family: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
}

.app {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* ---------- Panel ---------- */

.panel {
  width: 360px;
  min-width: 360px;
  height: 100%;
  background: var(--panel-bg);
  border-right: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-header {
  padding: 18px 16px 12px;
  border-bottom: 1px solid var(--panel-border);
  flex: none;
}

.panel-header h1 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text-hi);
}

.hint {
  margin: 0 0 14px;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--text-lo);
}

.hint code {
  color: var(--accent-2);
  font-family: inherit;
  background: rgba(108, 141, 181, 0.12);
  padding: 1px 4px;
  border-radius: 3px;
}

.field-label {
  font-size: 11px;
  color: var(--text-lo);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.floor-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.floor-row select {
  flex: 1;
}

.btn-icon {
  width: 28px;
  height: 28px;
  flex: none;
  border-radius: var(--radius);
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-hi);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}
.btn-icon:hover { border-color: var(--accent); color: var(--accent); }
.btn-icon:disabled { opacity: 0.35; cursor: not-allowed; }

select, input[type="number"], input[type="text"] {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-hi);
  border-radius: var(--radius);
  padding: 5px 7px;
  font-family: inherit;
  font-size: 12.5px;
}
select:focus, input:focus { outline: 1px solid var(--accent); outline-offset: 0; }

.presets-row {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
}

.btn-preset {
  flex: 1;
  padding: 7px 4px;
  font-size: 11.5px;
  border-radius: var(--radius);
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-hi);
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.12s, color 0.12s;
}
.btn-preset:hover { border-color: var(--accent); color: var(--accent); }
.btn-preset:active { transform: translateY(1px); }

.bg-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}
.bg-row label { color: var(--text-lo); font-size: 12px; }

.status-line {
  margin-top: 8px;
  font-size: 11px;
  color: var(--accent-2);
  line-height: 1.4;
  min-height: 1px;
}
.status-line.warn { color: var(--accent); }
.status-line.error { color: var(--danger); }

input[type="color"] {
  width: 30px;
  height: 22px;
  padding: 0;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  background: none;
  cursor: pointer;
}

/* ---------- Panel scroll body ---------- */

.panel-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}
.panel-scroll::-webkit-scrollbar { width: 8px; }
.panel-scroll::-webkit-scrollbar-thumb { background: #3A3A40; border-radius: 4px; }
.panel-scroll::-webkit-scrollbar-track { background: transparent; }

.panel-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--panel-border);
}

.panel-section h2 {
  margin: 0 0 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-lo);
  font-weight: 600;
}

.row-check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  padding: 4px 0;
  cursor: pointer;
  user-select: none;
}
.row-check input[type="checkbox"] { accent-color: var(--accent); cursor: pointer; }

.sub-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0 4px 24px;
  font-size: 12px;
  color: var(--text-lo);
}

.type-colors {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  padding: 6px 0 8px 24px;
}
.type-color-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}
.type-color-item span {
  font-size: 9.5px;
  color: var(--text-faint);
}
.type-color-item input[type="color"] { width: 100%; height: 20px; }

/* ---------- Cluster list ---------- */

.cluster-list-head {
  display: grid;
  grid-template-columns: 1fr 78px 24px;
  gap: 6px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  padding: 0 4px 6px;
}

.cluster-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  max-height: none;
}

.cluster-row {
  border-radius: var(--radius);
  padding: 7px 6px;
  background: var(--panel-bg-2);
  border: 1px solid transparent;
  transition: background 0.1s, border-color 0.15s;
}
.cluster-row:hover, .cluster-row.hovered { background: var(--row-hover); border-color: var(--input-border); }
.cluster-row.flash { border-color: var(--accent); }

.cluster-row.hidden-row { opacity: 0.5; }

.cr-top {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 6px;
}

.cr-swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex: none;
  border: 1px solid rgba(255,255,255,0.15);
}

.cr-id {
  font-family: "SF Mono", "Menlo", monospace;
  font-size: 11px;
  color: var(--text-hi);
  flex: none;
}

.cr-n {
  font-size: 10.5px;
  color: var(--text-faint);
  flex: 1;
  text-align: right;
}

.cr-role {
  width: 100%;
  font-size: 11px;
  padding: 3px 5px;
  margin-bottom: 6px;
}

.cr-controls {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  color: var(--text-lo);
}

.cr-controls input[type="color"] { width: 24px; height: 20px; }
.cr-controls input[type="number"] { width: 44px; padding: 3px 4px; font-size: 10.5px; }
.cr-controls label.mini {
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 10px;
  white-space: nowrap;
}
.cr-controls label.mini input[type="checkbox"] { accent-color: var(--accent); }

.cr-fill-row {
  display: flex;
  align-items: center;
  gap: 5px;
  grid-column: 1 / -1;
  margin-top: 4px;
  font-size: 10.5px;
  color: var(--text-lo);
}

/* ---------- Export ---------- */

.btn-full {
  display: block;
  width: 100%;
  text-align: center;
  padding: 8px 10px;
  margin-bottom: 8px;
  border-radius: var(--radius);
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-hi);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
}
.btn-full:hover { border-color: var(--accent-2); color: var(--accent-2); }
.btn-full:last-child { margin-bottom: 0; }
.btn-file { position: relative; overflow: hidden; }

/* ---------- Stage ---------- */

.stage-wrap {
  flex: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stage {
  flex: 1;
  position: relative;
  background: var(--stage-frame);
  overflow: hidden;
  cursor: grab;
  border: 1px solid #000;
}
.stage.dragging { cursor: grabbing; }

.stage-inner {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  will-change: transform;
}

.stage-inner svg {
  display: block;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.4), 0 20px 60px rgba(0,0,0,0.5);
}

.stage-toolbar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: var(--panel-bg);
  border-top: 1px solid var(--panel-border);
  font-size: 11.5px;
  color: var(--text-lo);
}

.btn-toolbar {
  padding: 5px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-hi);
  cursor: pointer;
  font-family: inherit;
  font-size: 11.5px;
}
.btn-toolbar:hover { border-color: var(--accent); color: var(--accent); }

.zoom-readout { color: var(--text-faint); font-variant-numeric: tabular-nums; }
.spacer { flex: 1; }
.status-msg { color: var(--accent-2); }
.status-msg.warn { color: var(--accent); }

.empty-msg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
  color: var(--text-lo);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- SVG cluster styling ---------- */

.cluster-group path {
  stroke: var(--c-stroke, #1E1B17);
  stroke-width: var(--c-width, 0.5);
  fill: var(--c-fill, none);
  opacity: var(--c-opacity, 1);
  vector-effect: non-scaling-stroke;
  cursor: pointer;
}

svg.hover-active .cluster-group path { opacity: 0.15; }
svg.hover-active .cluster-group.is-target path { opacity: var(--c-opacity, 1); }

.layer-units, .layer-orig-texts { pointer-events: none; }

.unit-fill { stroke: rgba(0,0,0,0.35); stroke-width: 0.6; vector-effect: non-scaling-stroke; }
.unit-balcony-fill { stroke: rgba(0,0,0,0.2); stroke-width: 0.5; vector-effect: non-scaling-stroke; fill-opacity: 0.5; }

.unit-label tspan { font-family: "DM Sans", sans-serif; }
.unit-label .num { font-weight: 700; }
.unit-label .area { font-weight: 400; }

.layer-orig-texts text { font-family: "DM Sans", sans-serif; fill: #66605A; opacity: 0.85; }

/* ---------- Fatal overlay ---------- */

.fatal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10,10,11,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.fatal-overlay[hidden] { display: none; }
.empty-msg[hidden] { display: none; }
.fatal-box {
  max-width: 480px;
  padding: 28px 32px;
  background: var(--panel-bg-2);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
}
.fatal-box h2 { margin: 0 0 10px; font-size: 16px; color: var(--danger); }
.fatal-box p { margin: 0; font-size: 12.5px; line-height: 1.6; color: var(--text-lo); white-space: pre-line; }