body {
  background: linear-gradient(to bottom right, #ffffff, #f2f2f2);
  color: #222;
  font-family: "Helvetica Neue", sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
}
.container {
  text-align: center;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 0 20px rgba(0,0,0,0.05);
  background: white;
}
.logo {
  width: 100px;
  margin-bottom: 20px;
}
.speed {
  font-size: 90px;
  font-weight: bold;
}
.unit {
  font-size: 26px;
  margin-bottom: 30px;
}
.status {
  font-size: 18px;
  color: #888;
}
.dot {
  display: inline-block;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}