/* === Model Combobox Component === */

.model-combobox {
  position: relative;
  width: 100%;
}

.model-combobox-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.model-combobox-trigger:hover:not(:disabled) {
  border-color: var(--text-dim);
}

.model-combobox-trigger:focus {
  border-color: var(--todo);
  box-shadow: var(--focus-ring);
}

.model-combobox-trigger:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.model-combobox-trigger-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: left;
}

.model-combobox-trigger-icon {
  display: inline-flex;
  margin-right: var(--space-sm);
  flex-shrink: 0;
}

.model-combobox-trigger-arrow {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: 8px;
  transition: transform 0.15s;
}

.model-combobox-trigger[aria-expanded="true"] .model-combobox-trigger-arrow {
  transform: rotate(180deg);
}

.model-combobox-dropdown {
  position: fixed;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  /* Must sit above QuickChatFAB mobile full-screen panel (z-index 1100). */
  z-index: 1200;
  max-height: 320px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.model-combobox-search-wrapper {
  position: relative;
  flex-shrink: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.model-combobox-search {
  width: 100%;
  padding: 10px 36px 10px 12px;
  background: var(--bg);
  border: none;
  border-radius: var(--radius) var(--radius) 0 0;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
}

.model-combobox-search::placeholder {
  color: var(--text-dim);
}

.model-combobox-search:focus {
  background: var(--card);
}

.model-combobox-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
  transition: color var(--transition-fast);
}

.model-combobox-clear:hover {
  color: var(--text);
}

.model-combobox-results-count {
  flex-shrink: 0;
  padding: 6px 12px;
  font-size: calc(var(--space-sm) + var(--space-xs) * 0.75);
  color: var(--text-muted);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.model-combobox-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 4px 0;
}

.model-combobox-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  transition: background 0.1s;
  overflow: hidden;
}

.model-combobox-option:hover,
.model-combobox-option--highlighted {
  background: var(--card-hover);
}

.model-combobox-option--selected {
  background: color-mix(in srgb, var(--todo) 15%, transparent);
}

.model-combobox-option--selected:hover,
.model-combobox-option--selected.model-combobox-option--highlighted {
  background: color-mix(in srgb, var(--todo) 25%, transparent);
}

.model-combobox-option-main {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 0;
  flex: 1;
}

.model-combobox-option-icon {
  display: inline-flex;
  flex-shrink: 0;
}

.model-combobox-option-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  color: var(--text);
}

.model-combobox-option-text--default {
  color: var(--text-muted);
  font-style: italic;
}

.model-combobox-option-id {
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-left: 8px;
  flex-shrink: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 40%;
}

.model-combobox-group {
  border-bottom: 1px solid var(--border);
}

.model-combobox-group:last-child {
  border-bottom: none;
}

.model-combobox-optgroup {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--bg);
  cursor: default;
  overflow: hidden;
}

.model-combobox-optgroup-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Provider favorite star (in optgroup header) */
.model-combobox-optgroup-favorite {
  padding: 2px 4px;
  font-size: 14px;
  color: var(--star-idle);
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1;
  flex-shrink: 0;
}
.model-combobox-optgroup-favorite:hover {
  color: var(--star-active);
}
.model-combobox-optgroup-favorite--active {
  color: var(--star-active);
}

/* Model favorite star (inside option row) */
.model-combobox-option-favorite {
  padding: 2px 4px;
  font-size: 12px;
  color: var(--star-idle);
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1;
  margin-left: auto;
  flex-shrink: 0;
}
.model-combobox-option-favorite:hover {
  color: var(--star-active);
}
.model-combobox-option-favorite--active {
  color: var(--star-active);
}

/* Favorited model pinned row */
.model-combobox-option--favorite {
  padding-left: 12px;
  background: var(--bg-secondary);
}

.model-combobox-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.model-combobox-no-results {
  padding: 16px 12px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
}

/* Mobile responsive model dropdown */
@media (max-width: 768px) {
  .model-combobox-dropdown {
    max-height: 50vh;
    max-height: 50dvh; /* Use dynamic viewport height where supported */
    width: min(360px, calc(100vw - 32px));
  }

  .model-combobox-search {
    font-size: 16px;
  }

  .model-combobox-option {
    min-height: 36px;
  }
}

@media (max-width: 640px) {
  .model-combobox-dropdown {
    max-height: 50vh;
    max-height: 50dvh;
    width: min(360px, calc(100vw - 32px));
  }
}