.lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.lang-toggle.is-floating {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10050; /* must be above landing overlay (#hemoai-loading uses 9999) */
}

.lang-toggle-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.86);
  font: 800 12px/1 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.10em;
  padding: 10px 12px;
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  transition: background 120ms ease, color 120ms ease, transform 120ms ease;
}

.lang-toggle-btn:hover {
  transform: translateY(-1px);
}

.lang-toggle-btn:active {
  transform: translateY(0);
}

.lang-toggle-btn[aria-pressed="true"] {
  background: linear-gradient(135deg, rgba(229, 62, 62, 0.95) 0%, rgba(185, 28, 28, 0.95) 100%);
  color: rgba(255, 255, 255, 0.98);
  box-shadow: 0 10px 26px rgba(185, 28, 28, 0.25);
}

.lang-toggle-btn:focus-visible {
  outline: 3px solid rgba(229, 62, 62, 0.65);
  outline-offset: 2px;
}

@media (prefers-color-scheme: light) {
  .lang-toggle {
    border-color: rgba(17, 24, 39, 0.14);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  }

  .lang-toggle-btn {
    color: rgba(17, 24, 39, 0.82);
  }

  .lang-toggle-btn[aria-pressed="true"] {
    color: rgba(255, 255, 255, 0.98);
  }
}

@media (max-width: 480px) {
  .lang-toggle.is-floating {
    top: 12px;
    right: 12px;
  }
}