* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: #080b16;
  color: #e4e9f5;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(140% 120% at 10% 0%, rgba(86, 136, 255, 0.25), transparent 45%),
    radial-gradient(120% 120% at 90% 10%, rgba(138, 91, 255, 0.18), transparent 55%),
    linear-gradient(180deg, #060911, #0a1122 60%, #050810);
}

header,
footer {
  padding: 18px clamp(18px, 5vw, 48px);
}

header h1 {
  margin: 0;
  font-size: clamp(24px, 2.6vw, 32px);
  letter-spacing: 0.08em;
}

header p {
  margin: 6px 0 0;
  color: rgba(226, 232, 240, 0.68);
  max-width: 640px;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 0 clamp(18px, 5vw, 48px) 36px;
}

.summary-bar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px clamp(18px, 4vw, 28px);
  background: linear-gradient(120deg, rgba(16, 20, 36, 0.9), rgba(10, 14, 28, 0.86));
  border-radius: 18px;
  box-shadow: 0 20px 42px rgba(5, 8, 18, 0.45);
}

.summary-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stat-pill {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(24, 30, 56, 0.85);
  box-shadow: inset 0 0 0 1px rgba(86, 110, 198, 0.18);
}

.stat-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(175, 186, 232, 0.78);
}

.stat-value {
  font-size: 13px;
  font-weight: 600;
  color: rgba(234, 238, 255, 0.92);
}

.summary-strip {
  display: flex;
  align-items: center;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  background: linear-gradient(120deg, rgba(21, 27, 46, 0.92), rgba(10, 14, 26, 0.88));
  border-radius: 20px;
  padding: 20px clamp(18px, 4vw, 28px);
  box-shadow: 0 26px 52px rgba(5, 8, 18, 0.55);
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.source-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar-left {
  flex: 1 1 auto;
  min-width: 320px;
}

.toolbar-right {
  flex: 1 1 auto;
  justify-content: flex-end;
}

.file-input {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(86, 136, 255, 0.88), rgba(125, 76, 255, 0.82));
  color: #f5f7ff;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 18px 36px rgba(86, 136, 255, 0.35);
  border: none;
}

.file-input input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.preset-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow-x: auto;
}

.preset-label {
  font-size: 13px;
  color: rgba(196, 205, 244, 0.72);
}

.preset-list {
  display: flex;
  gap: 8px;
}

.preset-item {
  padding: 7px 14px;
  border-radius: 999px;
  border: none;
  background: rgba(42, 54, 112, 0.55);
  color: rgba(220, 228, 255, 0.86);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.preset-item:hover {
  background: rgba(86, 136, 255, 0.32);
  box-shadow: 0 12px 28px rgba(76, 124, 255, 0.35);
}

.action-cluster {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cluster-title {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(165, 178, 232, 0.75);
  text-transform: uppercase;
}

.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.action-buttons button,
.import-button {
  padding: 9px 18px;
  border-radius: 999px;
  border: none;
  background: rgba(58, 72, 150, 0.32);
  color: rgba(218, 224, 255, 0.85);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.action-buttons button:hover,
.import-button:hover {
  background: rgba(87, 135, 255, 0.38);
  box-shadow: 0 14px 28px rgba(82, 128, 255, 0.3);
  transform: translateY(-1px);
}

button.ghost {
  padding: 10px 18px;
  border-radius: 999px;
  border: none;
  background: rgba(26, 32, 60, 0.75);
  color: rgba(216, 224, 255, 0.85);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

button.ghost:hover {
  box-shadow: 0 14px 28px rgba(82, 128, 255, 0.28);
  transform: translateY(-1px);
}

.main-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 6px;
  border-radius: 18px;
  background: rgba(15, 18, 32, 0.82);
  box-shadow: inset 0 0 0 1px rgba(74, 96, 188, 0.22), 0 12px 28px rgba(6, 9, 18, 0.45);
}

.main-tab {
  position: relative;
  padding: 10px 22px;
  border-radius: 14px;
  border: none;
  background: transparent;
  color: rgba(204, 212, 244, 0.72);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.2s ease, transform 0.2s ease;
}

.main-tab::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 14px;
  pointer-events: none;
  background: linear-gradient(95deg, rgba(88, 136, 255, 0.18), rgba(142, 90, 255, 0.18));
  opacity: 0;
  transition: opacity 0.2s ease, box-shadow 0.2s ease;
}

.main-tab:hover::after {
  opacity: 1;
  box-shadow: 0 12px 24px rgba(87, 135, 255, 0.2);
}

.main-tab.active {
  color: #f5f7ff;
  transform: translateY(-1px);
}

.main-tab.active::after {
  opacity: 1;
  background: linear-gradient(95deg, rgba(87, 135, 255, 0.85), rgba(139, 84, 255, 0.78));
  box-shadow: 0 20px 36px rgba(82, 128, 255, 0.38);
}

.main-pane {
  display: none;
  background: linear-gradient(180deg, rgba(13, 17, 32, 0.9), rgba(9, 12, 24, 0.94));
  border-radius: 20px;
  padding: clamp(18px, 4vw, 28px);
  box-shadow: 0 26px 52px rgba(5, 8, 18, 0.55);
}

.main-pane.active {
  display: block;
}

.marking-content {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.8fr);
  align-items: start;
}

@media (max-width: 1080px) {
  .toolbar {
    flex-direction: column;
  }
  .marking-content {
    grid-template-columns: minmax(0, 1fr);
  }
}

.preview-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  height: 100%;
  min-height: 540px;
}

.preview-wrapper {
  position: relative;
  overflow: auto;
  border-radius: 18px;
  background: rgba(9, 12, 22, 0.92);
  box-shadow: inset 0 0 0 1px rgba(118, 130, 196, 0.2);
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 18px;
  min-height: 540px;
  max-height: 70vh;
}

.preview-wrapper canvas {
  display: block;
  image-rendering: pixelated;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
}

.tile-strip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 6px 4px 4px;
  background: rgba(12, 16, 28, 0.78);
  border-radius: 14px;
  box-shadow: inset 0 0 0 1px rgba(78, 96, 188, 0.18);
}

.tile-list {
  --tile-thumb-width: 72px;
  --tile-thumb-height: 72px;
  display: flex;
  gap: 6px;
  align-items: flex-start;
}

.tile-item {
  background: rgba(13, 18, 32, 0.9);
  border-radius: 12px;
  padding: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: none;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(86, 110, 198, 0.16);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  min-width: calc(var(--tile-thumb-width) + 10px);
}

.tile-item:hover,
.tile-item.active {
  box-shadow: 0 16px 32px rgba(82, 128, 255, 0.35);
  transform: translateY(-1px);
}

.tile-thumb {
  position: relative;
  width: var(--tile-thumb-width);
  height: var(--tile-thumb-height);
  border-radius: 10px;
  background: rgba(22, 28, 48, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.tile-thumb canvas {
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
}

.tile-caption {
  position: absolute;
  left: 4px;
  bottom: 4px;
  padding: 2px 6px;
  border-radius: 999px;
  background: rgba(8, 10, 20, 0.72);
  color: #f5f7ff;
  font-size: 10px;
  letter-spacing: 0.04em;
  pointer-events: none;
}

.marking-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card,
.inspector-card,
.topology-shell,
.brush-card,
.marking-grid,
.summary-card {
  background: linear-gradient(180deg, rgba(16, 20, 38, 0.9), rgba(12, 15, 30, 0.88));
  border-radius: 16px;
  padding: 16px;
  box-shadow: inset 0 0 0 1px rgba(86, 110, 198, 0.12);
}

.marking-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hint {
  margin: 0 0 12px;
  font-size: 13px;
  color: rgba(168, 178, 220, 0.75);
}

.control-grid,
.inspector-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.control-grid label,
.inspector-grid label,
.area-controls label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: rgba(196, 205, 244, 0.78);
}

.control-grid input,
.inspector-grid input,
.inspector-grid select,
.area-controls input {
  padding: 7px 9px;
  border-radius: 12px;
  border: none;
  background: rgba(19, 24, 42, 0.92);
  color: inherit;
  box-shadow: inset 0 0 0 1px rgba(86, 110, 198, 0.2);
}

.group-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.group-pill {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(42, 56, 120, 0.35);
  color: rgba(216, 222, 255, 0.85);
  font-size: 11px;
  cursor: pointer;
  border: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.group-pill:hover {
  background: rgba(87, 135, 255, 0.42);
  box-shadow: 0 6px 16px rgba(82, 128, 255, 0.28);
  transform: translateY(-1px);
}

.group-pill.active {
  background: linear-gradient(95deg, rgba(87, 135, 255, 0.92), rgba(139, 84, 255, 0.88));
  box-shadow: 0 6px 18px rgba(82, 128, 255, 0.4);
}

.topology-pane {
  margin-top: 12px;
  background: rgba(11, 15, 27, 0.85);
  border-radius: 16px;
  padding: 14px;
  box-shadow: inset 0 0 0 1px rgba(86, 110, 198, 0.16);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.topology-pane[hidden] {
  display: none !important;
}

.road-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.road-selected {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(13, 17, 32, 0.9);
  color: rgba(202, 210, 244, 0.92);
  font-size: 12px;
  padding: 8px;
  box-shadow: inset 0 0 0 1px rgba(86, 110, 198, 0.2);
}

.road-variant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
  gap: 8px;
}

.road-variant-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  border-radius: 12px;
  border: none;
  background: rgba(26, 30, 52, 0.9);
  box-shadow: inset 0 0 0 1px rgba(98, 116, 212, 0.35);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.road-variant-btn:hover {
  background: rgba(86, 136, 255, 0.32);
  box-shadow: 0 12px 24px rgba(86, 136, 255, 0.28);
}

.road-variant-btn.active {
  background: linear-gradient(95deg, rgba(87, 135, 255, 0.9), rgba(139, 84, 255, 0.85));
  box-shadow: 0 14px 32px rgba(82, 128, 255, 0.45);
  transform: translateY(-1px);
}

.road-variant-btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  box-shadow: inset 0 0 0 1px rgba(98, 116, 212, 0.18);
}

.road-variant-icon {
  width: 44px;
  height: 44px;
}

.area-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.area-edge-grid,
.area-corner-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.painting-intro {
  margin-bottom: 12px;
}

.painting-layout {
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 1.2fr) minmax(220px, 0.8fr);
}

@media (max-width: 1080px) {
  .painting-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.board-pane {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: rgba(11, 16, 29, 0.82);
  border-radius: 18px;
  padding: 18px;
  box-shadow: inset 0 0 0 1px rgba(84, 104, 198, 0.15);
}

.board-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.board-controls label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: rgba(196, 205, 244, 0.78);
}

.board-controls input {
  width: 96px;
  padding: 7px 10px;
  border-radius: 12px;
  border: none;
  background: rgba(18, 22, 38, 0.92);
  color: inherit;
  box-shadow: inset 0 0 0 1px rgba(86, 110, 198, 0.2);
}

.board-wrapper {
  background: rgba(9, 13, 24, 0.92);
  border-radius: 16px;
  padding: 12px;
  box-shadow: inset 0 0 0 1px rgba(84, 104, 198, 0.18);
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: auto;
}

.board-wrapper canvas {
  display: block;
  background: rgba(6, 8, 16, 0.95);
  border-radius: 12px;
  image-rendering: pixelated;
}

.board-actions {
  font-size: 13px;
  color: rgba(178, 188, 232, 0.78);
}

.brush-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.brush-card {
  background: rgba(13, 17, 32, 0.82);
  border-radius: 18px;
  padding: 18px;
  box-shadow: inset 0 0 0 1px rgba(86, 110, 198, 0.15);
}

.brush-grid,
.event-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.brush-btn,
.event-btn {
  padding: 10px 12px;
  border-radius: 14px;
  border: none;
  background: rgba(42, 56, 120, 0.4);
  color: rgba(216, 222, 255, 0.85);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.brush-btn:hover,
.event-btn:hover {
  background: rgba(87, 135, 255, 0.38);
  box-shadow: 0 10px 26px rgba(82, 128, 255, 0.32);
  transform: translateY(-1px);
}

.brush-btn.active,
.event-btn.active {
  background: linear-gradient(95deg, rgba(87, 135, 255, 0.88), rgba(139, 84, 255, 0.82));
  box-shadow: 0 10px 24px rgba(82, 128, 255, 0.35);
  transform: translateY(-1px);
}

#status,
[data-kind='info'] {
  font-size: 13px;
  color: rgba(164, 177, 232, 0.78);
}

[data-kind='success'] {
  color: #5ee2ae;
}

[data-kind='error'] {
  color: #ff8c8c;
}

footer {
  font-size: 13px;
  color: rgba(168, 178, 220, 0.72);
  padding-bottom: 36px;
}