.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 50;
  height: var(--nav-h); display: flex; align-items: stretch;
  background: rgba(4,16,24,0.95); border-top: 1px solid var(--card-border);
  backdrop-filter: blur(16px); padding-bottom: env(safe-area-inset-bottom);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.bottom-nav::-webkit-scrollbar { display: none; }

.nav-item {
  flex: 1; min-width: 56px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1px; background: none; border: none; color: var(--muted);
  font-size: 9px; cursor: pointer; transition: color 0.2s; padding: 4px 2px;
}
.nav-item .nav-icon { font-size: 18px; }
.nav-item.active { color: var(--accent); }
.nav-item.active .nav-icon { transform: scale(1.15); }
.nav-item[data-page="game"] .nav-icon { animation: gameNavPulse 2s ease-in-out infinite; }
.nav-item[data-page="game"].active .nav-icon { animation: none; }

@keyframes gameNavPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); filter: drop-shadow(0 0 4px rgba(251,191,36,0.6)); }
}