/* 言語切替ピル - plateau-route-3d-v2（HUD / シアン+マゼンタ） */
.lang-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  display: inline-flex;
  border-radius: 999px;
  padding: 4px;
  background: rgba(7, 10, 15, 0.75);
  border: 1px solid rgba(34, 211, 238, 0.4);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-family: 'JetBrains Mono', monospace;
}

.lang-toggle__btn {
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(34, 211, 238, 0.6);
  transition: all 200ms ease;
}

.lang-toggle__btn:hover:not([aria-pressed="true"]) {
  color: #67e8f9;
}

.lang-toggle__btn[aria-pressed="true"] {
  background: linear-gradient(135deg, #e879f9, #e879f9);
  color: #070a0f;
  box-shadow: 0 0 12px rgba(232, 121, 249, 0.4);
}

.lang-toggle__btn:focus-visible {
  outline: 2px solid #e879f9;
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .lang-toggle { top: 12px; right: 12px; }
  .lang-toggle__btn { padding: 4px 10px; font-size: 10px; }
}