/* Zperiod's language menu (the globe dropdown), shared by the main site, Flame Studio
   and Molecular Shapes. Each page keeps its own toggle button; the menu and its
   options are defined only here. */

.lang-dropdown-menu {
  position: absolute;
  top: calc(100% + 16px);
  right: 0;
  min-width: 210px;
  max-width: min(320px, calc(100vw - 24px));
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94) 0%, rgba(248, 248, 250, 0.93) 100%);
  border-radius: 14px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: var(--shadow-xl, 0 16px 48px rgba(0, 0, 0, 0.12));
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.97);
  transition: opacity 280ms cubic-bezier(0.16, 1, 0.3, 1),
    visibility 280ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 280ms cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 10002;
  /* The right edge is a 12px scrollbar gutter, kept even when the list does not scroll,
     so both sides are 12px and the 4px bar runs down the middle of the right margin. */
  padding: 12px;
  padding-inline-end: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 70vh;
  overflow-y: auto;
  scrollbar-gutter: stable;
}

[dir="rtl"] .lang-dropdown-menu {
  right: auto;
  left: 0;
}

/* Higher specificity than any page-wide ::-webkit-scrollbar rule, so the gutter is always 12px. */
.lang-dropdown .lang-dropdown-menu::-webkit-scrollbar {
  width: 12px;
  background-color: transparent;
}

.lang-dropdown .lang-dropdown-menu::-webkit-scrollbar-track {
  background-color: transparent;
  margin: 12px 0;
}

.lang-dropdown .lang-dropdown-menu::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  background-clip: padding-box;
  border: 4px solid transparent;
  border-radius: 6px;
}

.lang-dropdown .lang-dropdown-menu:hover::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.25);
  background-clip: padding-box;
}

.lang-dropdown.open .lang-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.lang-option {
  /* Native and English names share one grid cell, so the English one appears exactly in place. */
  display: grid;
  grid-template-areas: "label";
  align-items: center;
  justify-items: start;
  width: 100%;
  min-height: 44px;
  padding: 12px 20px;
  border: none;
  border-radius: 12px;
  background: none;
  text-align: start;
  font-family: inherit;
  font-size: 15px;
  font-weight: 550;
  color: #2f3136;
  cursor: pointer;
  transition: background 180ms cubic-bezier(0.16, 1, 0.3, 1), color 180ms cubic-bezier(0.16, 1, 0.3, 1);
  white-space: normal;
  position: relative;
  overflow: hidden;
  min-width: 0;
  overflow-wrap: anywhere;
  line-height: 1.18;
}

.lang-option-label {
  grid-area: label;
  display: block;
  max-width: 100%;
  transform-origin: left center;
  transition:
    opacity 180ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 280ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

[dir="rtl"] .lang-option-label {
  transform-origin: right center;
}

.lang-option-native {
  opacity: 1;
  transform: scale(1);
}

.lang-option-english {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.94);
}

.lang-option:hover {
  background: rgba(0, 0, 0, 0.055);
  color: #15161a;
}

.lang-option:hover .lang-option-native,
.lang-option:focus-visible .lang-option-native {
  opacity: 0;
  transform: scale(0.94);
}

.lang-option:hover .lang-option-english,
.lang-option:focus-visible .lang-option-english {
  opacity: 1;
  transform: scale(1);
}

.lang-option:not(:last-child) {
  margin-bottom: 3px;
}

.lang-option.active {
  background: rgba(0, 0, 0, 0.09);
  color: #111827;
  font-weight: 650;
}

.lang-option:focus-visible {
  outline: 2px solid rgba(0, 0, 0, 0.25);
  outline-offset: 2px;
}

/* Dark: zperiod.app marks it with html.dark-theme, Molecular Shapes with data-theme. */
html.dark-theme .lang-dropdown-menu,
:root[data-theme="dark"] .lang-dropdown-menu {
  background: linear-gradient(180deg, rgba(30, 30, 40, 0.97) 0%, rgba(24, 24, 34, 0.97) 100%);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.3);
}

html.dark-theme .lang-dropdown .lang-dropdown-menu::-webkit-scrollbar,
:root[data-theme="dark"] .lang-dropdown .lang-dropdown-menu::-webkit-scrollbar {
  width: 12px;
}

html.dark-theme .lang-dropdown .lang-dropdown-menu::-webkit-scrollbar-thumb,
:root[data-theme="dark"] .lang-dropdown .lang-dropdown-menu::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
  background-clip: padding-box;
  border: 4px solid transparent;
  border-radius: 6px;
}

html.dark-theme .lang-dropdown .lang-dropdown-menu:hover::-webkit-scrollbar-thumb,
:root[data-theme="dark"] .lang-dropdown .lang-dropdown-menu:hover::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.28);
  background-clip: padding-box;
}

html.dark-theme .lang-option,
:root[data-theme="dark"] .lang-option {
  color: #c8c6d0;
}

html.dark-theme .lang-option:hover,
:root[data-theme="dark"] .lang-option:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

html.dark-theme .lang-option.active,
:root[data-theme="dark"] .lang-option.active {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}