body {
  margin: 0;
  font-family: system-ui, Arial, sans-serif;
  background: #111;
  color: #eee;
  display: flex;
}
#panel {
  width: 280px;
  background: #1d1d1d;
  padding: 14px 16px 40px;
  box-sizing: border-box;
  border-right: 1px solid #333;
  overflow-y: auto;
}
#panel h1 {
  font-size: 18px;
  margin: 0 0 10px;
}
#panel h2 {
  font-size: 14px;
  margin: 18px 0 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: #ccc;
}
#panel label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  margin-bottom: 8px;
}
#panel input[type="range"] {
  width: 100%;
}
#panel input[type="number"] {
  width: 80px;
}
#panel .row {
  display: flex;
  gap: 8px;
  align-items: center;
}
#panel button {
  background: #333;
  color: #eee;
  border: 1px solid #444;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 12px;
}
#panel button:hover {
  background: #444;
}
#canvas-wrapper {
  flex: 1;
  position: relative;
}
#overlay {
  position: absolute;
  left: 8px;
  bottom: 8px;
  background: rgba(0, 0, 0, 0.55);
  padding: 8px 10px;
  font-size: 12px;
  line-height: 1.35;
  border: 1px solid #333;
  border-radius: 4px;
  max-width: 360px;
}
a {
  color: #88c9ff;
}
.inline {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
#fps {
  font-weight: 600;
}