:root {
  --bg: #f4f1e8;
  --ink: #262626;
  --accent: #0d7a5f;
  --lane-safe: #7cc173;
  --lane-road: #434343;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 20% 10%, #fffdf6, var(--bg));
  color: var(--ink);
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

.app {
  width: min(94vw, 420px);
  display: grid;
  gap: 12px;
}

.hud {
  display: flex;
  justify-content: space-between;
  align-items: end;
}

.hud h1 {
  margin: 0;
  font-size: 1.2rem;
}

.stats {
  display: flex;
  gap: 10px;
  font-size: 0.95rem;
}

canvas {
  width: 100%;
  border: 3px solid #151515;
  border-radius: 10px;
  background: #91cc8d;
  touch-action: none;
}

.controls {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

button {
  border: 2px solid #1f1f1f;
  background: #fff;
  border-radius: 8px;
  padding: 10px;
  font-size: 0.95rem;
  font-weight: 700;
}

.hint {
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.85;
}