/* ===== Silver Lang Custom Select ===== */
/* A div-based replacement for native <select>, used by the language picker. */
/* The original <select> is kept in the DOM for accessibility/JS hooks but   */
/* is visually hidden. JS in lib/js/custom-select.js mirrors the value.    */

.custom-select {
  position: relative;
  display: inline-block;
  font-family: var(--font-sans);
  color: var(--color-text-primary);
}

/* Hide the underlying native <select> */
.lang-select {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* ---- Trigger button (looks like a normal select) ---- */
.custom-select-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 140px;
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  background: var(--color-bg-hover);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  cursor: pointer;
  user-select: none;
  position: relative;
  transition: border-color var(--transition-fast),
              background var(--transition-fast),
              box-shadow var(--transition-fast);
}

.custom-select-trigger:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-active);
}

.custom-select-trigger:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.custom-select.open .custom-select-trigger {
  border-color: var(--color-accent);
  background: var(--color-bg-elevated);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.custom-select-value {
  flex: 1;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.custom-select-arrow {
  position: absolute;
  right: 10px;
  top: 50%;
  width: 12px;
  height: 12px;
  transform: translateY(-50%) rotate(0deg);
  color: var(--color-text-tertiary);
  transition: transform var(--transition-base), color var(--transition-fast);
  pointer-events: none;
}

.custom-select.open .custom-select-arrow {
  transform: translateY(-50%) rotate(180deg);
  color: var(--color-accent);
}

/* ---- Dropdown panel ---- */
.custom-select-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 100%;
  width: max-content;
  max-width: 320px;
  max-height: 360px;
  display: flex;
  flex-direction: column;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  transform-origin: top left;
  pointer-events: none;
  visibility: hidden;
  transition: opacity var(--transition-fast),
              transform var(--transition-fast),
              visibility 0s linear var(--transition-fast);
  z-index: var(--z-dropdown);
  overflow: hidden;
}

.custom-select.open .custom-select-dropdown {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  visibility: visible;
  transition: opacity var(--transition-fast),
              transform var(--transition-fast),
              visibility 0s linear 0s;
}

/* When the dropdown is forced above (not enough room below) */
.custom-select-dropdown.flip {
  top: auto;
  bottom: calc(100% + 6px);
  transform-origin: bottom left;
}

.custom-select.open .custom-select-dropdown.flip {
  transform: translateY(0) scale(1);
}

/* ---- Inline search ---- */
.custom-select-search {
  position: relative;
  padding: var(--space-2);
  border-bottom: 1px solid var(--color-border-secondary);
  background: var(--color-bg-secondary);
}

.custom-select-search-input {
  width: 100%;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-8);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-fast);
}

.custom-select-search-input::placeholder {
  color: var(--color-text-tertiary);
}

.custom-select-search-input:focus {
  border-color: var(--color-accent);
}

.custom-select-search-icon {
  position: absolute;
  left: calc(var(--space-2) + 10px);
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: var(--color-text-tertiary);
  pointer-events: none;
}

/* ---- Options list ---- */
.custom-select-options {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-1);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-hover) transparent;
}

.custom-select-options::-webkit-scrollbar {
  width: 6px;
}

.custom-select-options::-webkit-scrollbar-track {
  background: transparent;
}

.custom-select-options::-webkit-scrollbar-thumb {
  background: var(--color-border-hover);
  border-radius: 9999px;
}

.custom-select-options::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-active);
}

.custom-select-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.custom-select-option:hover,
.custom-select-option.highlighted {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.custom-select-option.active {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  font-weight: 600;
}

.custom-select-option .custom-select-check {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--color-accent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.custom-select-option.active .custom-select-check {
  opacity: 1;
}

.custom-select-empty {
  padding: var(--space-4);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* ---- RTL support ---- */
html[lang^="ar"] .custom-select-value {
  text-align: right;
}

html[lang^="ar"] .custom-select-arrow {
  right: auto;
  left: 10px;
}

html[lang^="ar"] .custom-select-dropdown {
  left: auto;
  right: 0;
  transform-origin: top right;
}

html[lang^="ar"] .custom-select.open .custom-select-dropdown.flip {
  transform-origin: bottom right;
}

html[lang^="ar"] .custom-select-search-input {
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
}

html[lang^="ar"] .custom-select-search-icon {
  left: auto;
  right: calc(var(--space-2) + 10px);
}

html[lang^="ar"] .custom-select-option {
  flex-direction: row-reverse;
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .custom-select-dropdown,
  .custom-select-arrow,
  .custom-select-option,
  .custom-select-trigger {
    transition: none;
  }
}

/* ---- Mobile ---- */
@media (max-width: 768px) {
  .custom-select-dropdown {
    max-width: calc(100vw - 32px);
  }
}