.game-home-link {
  position: fixed;
  top: max(10px, env(safe-area-inset-top));
  left: max(10px, env(safe-area-inset-left));
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  color: #f5f8ff;
  background: rgba(7, 11, 20, 0.78);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.28);
  font: 700 12px/1 system-ui, -apple-system, "Segoe UI", "Noto Sans JP", sans-serif;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  backdrop-filter: blur(10px);
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.game-home-link:hover {
  border-color: rgba(121, 231, 255, 0.65);
  background: rgba(17, 29, 43, 0.94);
  transform: translateY(-1px);
}

.game-home-link:focus-visible {
  outline: 2px solid #79e7ff;
  outline-offset: 3px;
}

.game-home-link:active {
  transform: translateY(1px);
}

@media (max-width: 480px), (max-height: 520px) {
  .game-home-link {
    min-height: 32px;
    padding: 7px 10px;
    font-size: 11px;
    background: rgba(7, 11, 20, 0.68);
  }
}

@media (prefers-reduced-motion: reduce) {
  .game-home-link {
    transition: none;
  }
}