body {
  font-family: sans-serif;
  text-align: center;
  margin: 0;
  padding: 0;
  background: #e0e0e0;
}

h1 {
  margin: 20px;
}

.track-selector button,
.controls button {
  margin: 10px;
  padding: 10px 20px;
  font-weight: bold;
  cursor: pointer;
}

.track {
  position: relative;
  width: 90%;
  height: 200px;
  margin: 20px auto;
  background: repeating-linear-gradient(
    0deg,
    #444 0px,
    #444 20px,
    #666 20px,
    #666 40px
  );
  border: 4px solid #000;
  overflow: hidden;
  border-radius: 10px;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
}

.car {
  position: absolute;
  width: 50px;
  height: 30px;
  top: 0;
  left: 0;
  transition: left 0.3s ease;
  border-radius: 5px;
}

#car1 { background: red; top: 10px; }
#car2 { background: blue; top: 60px; }
#car3 { background: green; top: 110px; }
#car4 { background: orange; top: 160px; }

.controls button,
.track-selector button {
  margin: 10px;
  padding: 15px 25px;
  font-size: 1.1rem;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  background-color: #444;
  color: #fff;
  cursor: pointer;
  transition: background 0.3s;
}

.controls button:hover,
.track-selector button:hover {
  background-color: #222;
}

@media (hover: none) and (pointer: coarse) {
  .controls button,
  .track-selector button {
    padding: 20px 30px;
    font-size: 1.3rem;
  }
}