* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  touch-action: manipulation;
}

body {
  color: #333;
  overflow: hidden;
  background: #111;
  height: 100vh;
  margin: 0;
  padding: 0;
}

#score {
  position: fixed;
  top: 10px;
  left: 10px;
  color: white;
  font-size: 13px;
  padding: 5px;
  z-index: 99;
  background: rgba(0,0,0,0.5);
  border-radius: 4px;
}

#score p {
  display: inline-block;
  margin-right: 10px;
}

#fpsCounter {
  position: fixed;
  top: 10px;
  right: 10px;
  color: lime;
  font-family: monospace;
  font-size: 1.2em;
  z-index: 100;
  background: rgba(0,0,0,0.5);
  padding: 3px 8px;
  border-radius: 4px;
}

button:focus {
  outline: none;
}

#gameOverEl {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 1em;
  text-align: center;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  background: rgba(0,0,0,0.2);
  backdrop-filter: blur(4px);
  display: none;
}

#gameOverEl > div {
  width: 100%;
  max-width: 350px;
  padding: 1.5em;
  background: rgba(34,34,34,0.8);
  border-radius: 10px;
  color: white;
  z-index: 1000;
}

#gameOverEl h1 {
  font-size: 3em;
  font-weight: 600;
  color: white;
}

#gameOverEl p {
  font-size: 14px;
}

#gameOverEl button {
  width: 100%;
  margin-top: 0.5em;
  border: none;
  color: white;
  cursor: pointer;
  border-radius: 2em;
  padding: 0.8em 1.5em;
  background: dodgerblue;
  transition: all 0.3s ease;
}

#gameOverEl button.restart {
  background: #4CAF50;
}

#gameOverEl button.reset {
  background: #f44336;
}

#gameOverEl button.home {
  background: #9C27B0;
}

#gameOverEl button:hover {
  opacity: 0.8;
}

canvas {
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: block;
}