* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 20% 20%, #173a9e 0, #001528 45%, #000814 100%);
  color: #e5f5ff;
  overflow: hidden;
  width: 100%;
  height: 100%;
}

#ui {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 10;
  background: rgba(0, 10, 40, 0.7);
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(6px);
}

#ui h1 {
  font-size: 18px;
  margin-bottom: 4px;
}

#ui p {
  font-size: 13px;
  opacity: 0.85;
}

#gameCanvas {
  display: block;
  width: 100vw;
  height: 100vh;
  margin: 0;
  border-radius: 0;
  border: none;
  box-shadow: none;
  background: linear-gradient(#003f5c, #001f3f 40%, #000814 75%);
}