:root {
  --bg: #0f172a;
  --panel: #111827;
  --accent: #22d3ee;
  --accent-2: #a78bfa;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --danger: #ef4444;
  --ok: #22c55e;
}

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Arial, sans-serif;
}

#ui {
  position: fixed;
  top: 8px;
  left: 8px;
  right: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 10;
}

#category-bar {
  display: flex;
  justify-content: center;
  gap: 4px;
}

#category-bar button {
  background: #1f2937;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.1s ease;
}

#category-bar button:active {
  transform: scale(0.95);
}

#category-bar button.active {
  box-shadow: 0 0 0 2px var(--accent) inset;
}

#tool-panel-container {
  display: flex;
  position: relative;
  height: 0;
  overflow: visible;
  padding-bottom: 250px;
}

.tool-panel {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.25);
  display: none;
  flex-direction: column;
  gap: 12px;
}

.tool-panel.active {
  display: flex;
}

#back-button {
  background: #2a1212;
  color: #fecaca;
  border: none;
  outline: none;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 1.2rem;
  cursor: pointer;
  margin-bottom: 8px;
  align-self: flex-start;
}

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

.tool-button, .setting-item button {
  background: #1f2937;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 10px 8px;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: transform 0.1s ease;
}

.tool-button.active, .setting-item button.active {
  box-shadow: 0 0 0 2px var(--accent) inset;
}

.tool-button:active, .setting-item button:active {
  transform: scale(0.95);
}

.setting-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}

.setting-item label {
  font-size: 10px;
  color: var(--muted);
}

.setting-item select, .setting-item input[type=range] {
  width: 100%;
  appearance: none;
  border: none;
  outline: none;
  padding: 6px 8px;
  border-radius: 10px;
  background: #1f2937;
  color: var(--text);
  font-size: 12px;
  accent-color: var(--accent);
}

.setting-item select {
  padding: 8px;
}

.coming-soon {
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  padding: 20px;
}

#human-info {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(17, 24, 39, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 12px;
  border-radius: 12px;
  z-index: 20;
  box-shadow: 0 5px 20px rgba(0,0,0,0.5);
  font-size: 14px;
}

#human-info p {
  margin: 4px 0;
}

#stats {
  position: fixed;
  left: 8px;
  bottom: 8px;
  background: rgba(17, 24, 39, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 6px 8px;
  border-radius: 10px;
  font-variant-numeric: tabular-nums;
  display: flex;
  gap: 8px;
  font-size: 12px;
}

canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;
}