body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #000;
}

.container {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0;
  margin: 0;
  width: 100%;
  height: calc(100% - 120px);
}

.canvas-container {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

#canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: #000;
}

.button {
  display: flex;
  justify-content: center;
  padding: 10px 0;
  background-color: #222;
  width: 100%;
}

.btn {
  background-color: #4caf50;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 0 10px;
  cursor: pointer;
  border-radius: 5px;
  min-width: 100px;
}

.btn:hover {
  background-color: #3e8e41;
}

.control, .mobile-control {
  text-align: center;
  margin: 0;
  padding: 10px 0;
  font-size: 16px;
  color: white;
  background-color: #222;
}

.mobile-control {
  display: none;
}

@media (max-width: 768px) {
  .container {
    height: calc(100% - 140px);
  }
  
  .control {
    display: none;
  }
  
  .mobile-control {
    display: block;
  }
  
  .btn {
    padding: 12px 20px;
    font-size: 16px;
  }
}

.modal {
  color: #333;
}