:root {
  --primary: #39FF14;
  --bg: #050505;
  --text: #ffffff;
}

body, html, #root {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
}

#ui-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 40px;
  box-sizing: border-box;
  z-index: 10;
}

.speed-indicator {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 200px;
}

.speed-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 2px;
  opacity: 0.6;
}

.speed-bar-container {
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
}

.speed-bar {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.1s ease-out;
  box-shadow: 0 0 10px var(--primary);
}

.instructions {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  opacity: 0.4;
  font-weight: 300;
  letter-spacing: 1px;
  pointer-events: none;
  transition: opacity 1s ease;
}

.instructions.hidden {
  opacity: 0;
}