/* Language Toggle — Sliding Pill */
.lang-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: flex;
  z-index: 1000;
  border-radius: 2rem;
  padding: 3px;
  overflow: hidden;
  /* Frosted glass */
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow:
    0 2px 12px rgba(0, 0, 0, 0.06),
    0 0 0 1px rgba(0, 0, 0, 0.03);
  transition: box-shadow 0.3s ease;
}

.lang-toggle:hover {
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.1),
    0 0 0 1px rgba(0, 0, 0, 0.04);
}

/* Sliding highlight pill */
.lang-slider {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: calc(50% - 3px);
  border-radius: 1.6rem;
  background: rgba(30, 30, 30, 0.88);
  box-shadow:
    0 1px 4px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
  z-index: 1;
  pointer-events: none;
}

/* Slide to RU position */
.lang-slider[data-position="ru"] {
  transform: translateX(100%);
}

.lang-btn {
  position: relative;
  z-index: 2;
  flex: 1;
  background: transparent;
  border: none;
  padding: 0.35rem 0.75rem;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  color: #666;
  transition: color 0.3s ease;
  font-family: inherit;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.4;
  /* Override LittleLink .button,button styles */
  width: auto;
  min-height: auto;
  margin-bottom: 0;
  border-radius: 0;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.lang-btn.active {
  color: #fff;
}

.lang-btn:hover:not(.active) {
  color: #333;
}

/* ── Dark theme ── */
.theme-dark .lang-toggle {
  background: rgba(30, 30, 30, 0.55);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow:
    0 2px 12px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(255, 255, 255, 0.04);
}

.theme-dark .lang-toggle:hover {
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.06);
}

.theme-dark .lang-slider {
  background: rgba(255, 255, 255, 0.92);
  box-shadow:
    0 1px 4px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.theme-dark .lang-btn {
  color: #888;
}

.theme-dark .lang-btn.active {
  color: #1a1a1a;
}

.theme-dark .lang-btn:hover:not(.active) {
  color: #ccc;
}

/* ── Auto theme (dark mode) ── */
@media (prefers-color-scheme: dark) {
  .theme-auto .lang-toggle {
    background: rgba(30, 30, 30, 0.55);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow:
      0 2px 12px rgba(0, 0, 0, 0.3),
      0 0 0 1px rgba(255, 255, 255, 0.04);
  }

  .theme-auto .lang-toggle:hover {
    box-shadow:
      0 4px 20px rgba(0, 0, 0, 0.4),
      0 0 0 1px rgba(255, 255, 255, 0.06);
  }

  .theme-auto .lang-slider {
    background: rgba(255, 255, 255, 0.92);
    box-shadow:
      0 1px 4px rgba(0, 0, 0, 0.2),
      inset 0 1px 0 rgba(255, 255, 255, 0.5);
  }

  .theme-auto .lang-btn {
    color: #888;
  }

  .theme-auto .lang-btn.active {
    color: #1a1a1a;
  }

  .theme-auto .lang-btn:hover:not(.active) {
    color: #ccc;
  }
}

/* ── Mobile ── */
@media (max-width: 480px) {
  .lang-toggle {
    top: 0.5rem;
    right: 0.5rem;
    padding: 2px;
  }

  .lang-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.65rem;
    letter-spacing: 0.06em;
  }

  .lang-slider {
    top: 2px;
    bottom: 2px;
    left: 2px;
    width: calc(50% - 2px);
    border-radius: 1.4rem;
  }
}