html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  color: #f4f8ff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}
canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  background: #000;
  cursor: grab;
}
canvas:active { cursor: grabbing; }
.hud {
  position: fixed;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 11px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  background: rgba(0,0,0,.38);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 70px rgba(0,0,0,.42);
  color: rgba(242,247,255,.78);
  user-select: none;
}
.hud.top {
  left: 14px;
  top: 14px;
  font-size: 11px;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.hud.bottom {
  left: 14px;
  bottom: 14px;
  border-radius: 18px;
  font-size: 11px;
  color: rgba(242,247,255,.66);
}
.hud a, .hud button, .hud span {
  color: rgba(248,251,255,.93);
  text-decoration: none;
}
.hud button {
  border: 0;
  border-left: 1px solid rgba(255,255,255,.22);
  padding-left: 10px;
  background: transparent;
  font: inherit;
  cursor: pointer;
}
.hud strong { color: white; font-weight: 850; }
@media (max-width: 760px) {
  .hud.bottom { display: none; }
  .hud.top { right: 14px; flex-wrap: wrap; border-radius: 18px; }
}