/* =====================================================
   南洋通 NanYangTong — Language Switcher CSS
   lang.css
===================================================== */

/* ── Language Switcher Container ── */
.lang-switcher {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-right: 10px;
  z-index: 1200;          /* must sit above .top-bar (1100) and .main-header (1000) */
}

/* Toggle button */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.35);
  color: #fff;
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12.5px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  white-space: nowrap;
  user-select: none;
}
.lang-toggle:hover {
  background: rgba(255,255,255,0.28);
  border-color: rgba(255,255,255,0.55);
}
.lang-toggle .fa-globe {
  font-size: 13px;
  opacity: 0.9;
}
.lang-current {
  font-weight: 600;
  letter-spacing: 0.03em;
  min-width: 24px;
  text-align: center;
}
.lang-arrow {
  font-size: 9px;
  opacity: 0.75;
  transition: transform 0.2s;
}
.lang-switcher.open .lang-arrow {
  transform: rotate(180deg);
}

/* ── Dropdown panel ── */
.lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 10px 36px rgba(0,0,0,0.18), 0 2px 8px rgba(0,0,0,0.08);
  overflow: hidden;
  min-width: 168px;
  border: 1px solid rgba(0,0,0,0.07);
  animation: langDropIn 0.18s ease;
  /* must sit above .main-header sticky nav (z-index:1000) */
  z-index: 9999;
}
.lang-switcher.open .lang-dropdown {
  display: block;
}
@keyframes langDropIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0)   scale(1); }
}

/* small arrow pointer at top of dropdown */
.lang-dropdown::before {
  content: '';
  position: absolute;
  top: -7px;
  right: 18px;
  width: 13px;
  height: 13px;
  background: #fff;
  border-left: 1px solid rgba(0,0,0,0.07);
  border-top: 1px solid rgba(0,0,0,0.07);
  transform: rotate(45deg);
  border-radius: 2px;
}

/* dropdown header label */
.lang-dropdown-label {
  padding: 10px 16px 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #aaa;
  border-bottom: 1px solid #f0f0f0;
  margin-bottom: 4px;
}

/* Individual language buttons */
.lang-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 16px;
  background: none;
  border: none;
  color: #333;
  font-size: 13.5px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, color 0.15s;
  position: relative;
}
.lang-btn:last-child {
  margin-bottom: 4px;
}
.lang-btn:hover {
  background: #f0faf5;
  color: #1a6b3a;
}
.lang-btn.active {
  background: #e8f5e9;
  color: #1a6b3a;
  font-weight: 700;
}
.lang-btn.active::after {
  content: '✓';
  margin-left: auto;
  font-size: 13px;
  color: #2d9b5c;
  font-weight: 700;
}
.lang-flag {
  font-size: 18px;
  line-height: 1;
  flex-shrink: 0;
}
.lang-name {
  flex: 1;
}
.lang-native {
  font-size: 11px;
  color: #999;
  margin-left: auto;
  padding-left: 6px;
  white-space: nowrap;
}
.lang-btn.active .lang-native {
  display: none; /* replaced by checkmark */
}

/* ── Placement inside .top-bar-right ── */
.top-bar-right .lang-switcher {
  margin-right: 0;
  margin-left: 6px;
}
.top-bar-right .lang-switcher + .divider {
  display: none;
}

/* ── Mobile ── */
@media (max-width: 768px) {
  .lang-switcher {
    margin-right: 4px;
  }
  .lang-toggle {
    padding: 3px 9px;
    font-size: 12px;
  }
  .lang-dropdown {
    right: -8px;
    min-width: 150px;
  }
  .lang-btn {
    padding: 9px 13px;
    font-size: 13px;
  }
}

/* ── RTL safeguard ── */
[dir="rtl"] .lang-dropdown {
  right: auto;
  left: 0;
}
[dir="rtl"] .lang-dropdown::before {
  right: auto;
  left: 18px;
}

/* ── Active language indicator in top bar ── */
.top-bar .lang-switcher .lang-toggle {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.25);
  font-size: 12px;
}

/* ── Dark mode ── */
@media (prefers-color-scheme: dark) {
  .lang-dropdown {
    background: #1e2030;
    border-color: rgba(255,255,255,0.1);
    box-shadow: 0 10px 36px rgba(0,0,0,0.5);
  }
  .lang-dropdown::before {
    background: #1e2030;
    border-color: rgba(255,255,255,0.1);
  }
  .lang-dropdown-label {
    color: #666;
    border-bottom-color: rgba(255,255,255,0.07);
  }
  .lang-btn {
    color: #ddd;
  }
  .lang-btn:hover {
    background: rgba(45,155,92,0.13);
    color: #6fcf97;
  }
  .lang-btn.active {
    background: rgba(45,155,92,0.2);
    color: #6fcf97;
  }
  .lang-native {
    color: #555;
  }
}

/* ── Text transition on language switch ── */
[data-i18n] {
  transition: opacity 0.12s ease;
}
.lang-transitioning [data-i18n] {
  opacity: 0.3;
}

/* ── Language change feedback animation ── */
@keyframes langFeedbackIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes langFeedbackOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(20px); }
}