body {
  font-family: 'Segoe UI', sans-serif;
  background: #111;
  color: #00ffcc;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  padding: 0;
}

.container {
  text-align: center;
  background: #222;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 0 20px #00ffcc55;
  width: 90%;
  max-width: 600px;
  box-sizing: border-box;
  margin: 20px auto;
}

.speed-box {
  font-size: 1.5rem;
  margin-top: 1rem;
}

canvas {
  margin-top: 2rem;
  background: #000;
  border-radius: 10px;
  max-width: 100%;
}

button {
  margin-top: 1.5rem;
  padding: 10px 20px;
  font-size: 1rem;
  border: none;
  border-radius: 10px;
  background: #00ffcc;
  color: #111;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #00e6b8;
}

.ad-banner {
  margin: 10px auto;
  display: flex;
  justify-content: center;
  align-items: center;
}

.desktop-ad {
  display: none;
}

.mobile-ad {
  display: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Responsive rules */
@media (min-width: 768px) {
  .desktop-ad {
    display: block;
  }
}

@media (max-width: 767px) {
  .mobile-ad {
    display: block;
  }

  .speed-box {
    font-size: 1.2rem;
  }

  button {
    font-size: 0.95rem;
  }

  canvas {
    height: 180px !important;
  }
}