body {
  background: #23272f;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
}
#pong-container {
  position: relative;
}
#controls {
  background: #266fed;
  color: #fff;
  padding: 16px 24px 12px 24px;
  border-radius: 10px 10px 0 0;
  margin-bottom: 0;
  box-shadow: 0 4px 20px #0004;
  font-family: 'Segoe UI', Arial, sans-serif;
}
#controls h2 {
  margin: 0 0 5px 0;
  font-size: 1.3em;
  font-weight: bold;
}
#controls ul {
  margin: 0;
  padding-left: 1.2em;
  font-size: 1.08em;
}
#controls li {
  margin-bottom: 2px;
  line-height: 1.5;
}
#controls kbd {
  background: #fff6;
  border-radius: 4px;
  padding: 0px 5px;
  font-size: 1em;
  font-family: monospace;
}
#pong-canvas {
  background: #191c22;
  display: block;
  border-radius: 0 0 10px 10px;
  box-shadow: 0 8px 32px #0008;
}
#scoreboard {
  color: #fff;
  font-size: 32px;
  font-family: monospace;
  font-weight: bold;
  display: flex;
  justify-content: center;
  gap: 1em;
  position: absolute;
  top: 16px;
  width: 100%;
  pointer-events: none;
  text-shadow: 0 2px 8px #000c;
}