/* ============================================================
   LANGUAGE SELECTOR & DROPDOWN MENU — Luxury Optical Glass
   
   پشتیبانی از ۶ زبان (فارسی، انگلیسی، عربی، روسی، آلمانی، چینی)
   شیشه اپتیکال با بلور ۲۸ پیکسل، رفلکس نوری ریم، و موشن اسلاید نرم.
   ============================================================ */

.lang-selector {
  --tb-h: clamp(38px, 4vw, 44px);
  --lb-h: clamp(32px, 3.4vw, 36px);

  position: fixed;
  inset-block-start: calc(clamp(1rem, 2.5vh, 1.75rem) + var(--tb-h) + 8px);
  inset-inline-end: clamp(1rem, 2.5vw, 2rem);
  z-index: var(--z-menu-btn, 500);
  isolation: isolate;
}

/* دکمه اصلی انتخاب زبان (Trigger) */
.lang-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding-inline: 12px;
  padding-block: 0;
  block-size: var(--lb-h);
  min-inline-size: clamp(68px, 6.5vw, 78px);

  border-radius: var(--r-pill);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background-color: rgba(12, 14, 20, 0.65);
  background-image:
    radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 65%),
    linear-gradient(135deg,
      rgba(255, 255, 255, 0.14) 0%,
      rgba(255, 255, 255, 0.02) 42%,
      rgba(10, 12, 18, 0.75) 100%);
  -webkit-backdrop-filter: blur(24px) saturate(1.8);
  backdrop-filter: blur(24px) saturate(1.8);

  box-shadow:
    0 8px 24px -4px rgba(0, 0, 0, 0.5),
    inset 0  1px 1px 0 rgba(255, 255, 255, 0.35),
    inset 0 -1px 2px 0 rgba(0, 0, 0, 0.5);

  cursor: pointer;
  color: var(--c-text);
  font-family: inherit;

  transition:
    border-color var(--dur-fast) var(--ease),
    box-shadow   var(--dur-fast) var(--ease),
    transform    var(--dur-fast) var(--ease);
}

.lang-btn:hover {
  border-color: rgba(168, 85, 247, 0.55);
  box-shadow:
    0 12px 28px -4px rgba(0, 0, 0, 0.65),
    0 0 18px -2px rgba(168, 85, 247, 0.35),
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.45);
  transform: translateY(-1px);
}

.lang-btn:focus-visible {
  outline: 2px solid #A855F7;
  outline-offset: 3px;
}

.lang-btn__globe {
  display: flex;
  align-items: center;
  color: #A855F7;
  inline-size: 15px;
  block-size: 15px;
  transition: transform 0.3s ease;
}

.lang-btn:hover .lang-btn__globe {
  transform: rotate(35deg);
  color: #C084FC;
}

.lang-btn__globe svg {
  inline-size: 100%;
  block-size: 100%;
}

.lang-btn__current {
  font-size: 0.78rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.02em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.lang-btn__arrow {
  display: flex;
  align-items: center;
  inline-size: 11px;
  block-size: 11px;
  opacity: 0.7;
  color: var(--c-text-dim);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.lang-btn__arrow svg {
  inline-size: 100%;
  block-size: 100%;
}

.lang-btn[aria-expanded='true'] .lang-btn__arrow {
  transform: rotate(180deg);
  opacity: 1;
  color: #A855F7;
}

/* تم روشن */
:root[data-theme='light'] .lang-btn {
  background-color: rgba(255, 255, 255, 0.88);
  background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(240, 243, 248, 0.9) 100%);
  border-color: rgba(0, 0, 0, 0.14);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.08);
}

:root[data-theme='light'] .lang-btn__current {
  color: #1E1B4B;
}

:root[data-theme='light'] .lang-btn:hover {
  border-color: rgba(124, 58, 237, 0.45);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.16);
}

/* ------------------------------------------------------------
   DROPDOWN MENU LIST
   ------------------------------------------------------------ */

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  inset-inline-end: 0;
  min-inline-size: 172px;

  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 6px;

  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background-color: rgba(17, 10, 28, 0.92);
  background-image:
    radial-gradient(circle at 100% 0%, rgba(168, 85, 247, 0.16) 0%, transparent 60%),
    linear-gradient(160deg, rgba(30, 16, 48, 0.95) 0%, rgba(12, 7, 20, 0.98) 100%);
  -webkit-backdrop-filter: blur(28px) saturate(1.8);
  backdrop-filter: blur(28px) saturate(1.8);

  box-shadow:
    0 20px 48px -8px rgba(0, 0, 0, 0.75),
    0 0 24px -2px rgba(147, 51, 234, 0.22),
    inset 0 1px 1px 0 rgba(255, 255, 255, 0.2);

  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px) scale(0.95);
  transform-origin: top right;
  transition:
    opacity 0.22s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 510;
}

html[dir='ltr'] .lang-menu {
  transform-origin: top right;
}

.lang-menu.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

:root[data-theme='light'] .lang-menu {
  background-color: rgba(255, 255, 255, 0.96);
  background-image: linear-gradient(160deg, #FFFFFF 0%, #F5F3FF 100%);
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
}

/* آیتم گزینه‌های زبان */
.lang-menu__opt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--c-text-dim);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  text-align: start;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  user-select: none;
  -webkit-user-select: none;
}

.lang-menu__opt:hover {
  background: rgba(168, 85, 247, 0.16);
  color: #FFFFFF;
  border-color: rgba(168, 85, 247, 0.25);
  transform: translateX(-2px);
}

html[dir='ltr'] .lang-menu__opt:hover {
  transform: translateX(2px);
}

.lang-menu__opt.is-active {
  background: linear-gradient(135deg, rgba(147, 51, 234, 0.35) 0%, rgba(79, 70, 229, 0.35) 100%);
  border-color: rgba(192, 132, 252, 0.45);
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(147, 51, 234, 0.25);
}

:root[data-theme='light'] .lang-menu__opt {
  color: #4B5563;
}

:root[data-theme='light'] .lang-menu__opt:hover {
  background: rgba(124, 58, 237, 0.08);
  color: #111827;
}

:root[data-theme='light'] .lang-menu__opt.is-active {
  background: rgba(124, 58, 237, 0.15);
  color: #6D28D9;
  border-color: rgba(124, 58, 237, 0.3);
}

.lang-menu__flag {
  font-size: 1.05rem;
  line-height: 1;
}

.lang-menu__name {
  flex: 1;
}

.lang-menu__code {
  font-size: 0.68rem;
  font-weight: 700;
  opacity: 0.65;
  letter-spacing: 0.04em;
  padding: 2px 5px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
}

.lang-menu__opt.is-active .lang-menu__code {
  opacity: 1;
  background: rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
}

/* تایپوگرافی ویژه زبان‌های غیرفارسی */
html[lang='en'],
html[lang='ru'],
html[lang='de'],
html[lang='zh'] {
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
}

html[lang='zh'] {
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}