/* Agent 模型 — 自定义下拉（简约、自适应高度） */
.uia-model-picker {
  position: relative;
  margin-top: 0.375rem;
}

.uia-model-picker__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.875rem;
  border: 1px solid #e2e8f0;
  border-radius: 0.625rem;
  background: linear-gradient(180deg, #ffffff 0%, #fafafa 100%);
  font-size: 0.8125rem;
  line-height: 1.35;
  color: #0f172a;
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  text-align: left;
}

.uia-model-picker__trigger:hover:not(:disabled) {
  border-color: #93c5fd;
  background: #fff;
}

.uia-model-picker__trigger:focus-visible {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.14);
}

.uia-model-picker.is-open .uia-model-picker__trigger {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
  background: #fff;
}

.uia-model-picker__trigger:disabled {
  opacity: 0.58;
  cursor: not-allowed;
  background: #f8fafc;
}

.uia-model-picker__value {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.uia-model-picker__value.is-placeholder {
  color: #94a3b8;
  font-weight: 400;
}

.uia-model-picker__chevron {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  color: #64748b;
  transition: transform 0.2s ease, color 0.15s ease;
}

.uia-model-picker.is-open .uia-model-picker__chevron {
  transform: rotate(180deg);
  color: #2563eb;
}

.uia-model-picker.is-open {
  z-index: 200;
}

.uia-model-picker__panel.is-floating {
  position: fixed;
  left: 0;
  right: auto;
  z-index: 10050;
}

.uia-model-picker__panel {
  position: absolute;
  left: 0;
  right: 0;
  z-index: 120;
  background: #fff;
  border: 1px solid #e8ecf1;
  border-radius: 0.75rem;
  box-shadow:
    0 16px 48px rgba(15, 23, 42, 0.1),
    0 4px 14px rgba(15, 23, 42, 0.05);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-4px) scale(0.99);
  pointer-events: auto;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.uia-model-picker__panel:not(.is-open) {
  pointer-events: none;
}

.uia-model-picker__panel.is-open {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.uia-model-picker__panel.is-hidden {
  visibility: hidden;
}

.uia-model-picker__panel.is-open.is-hidden {
  visibility: visible;
}

.uia-model-picker__panel--above {
  bottom: calc(100% + 6px);
  top: auto;
}

.uia-model-picker__panel--below {
  top: calc(100% + 6px);
  bottom: auto;
}

.uia-model-picker__list {
  list-style: none;
  margin: 0;
  padding: 0.375rem 0.3125rem 0.375rem 0.375rem;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(37, 99, 235, 0.32) transparent;
}

.uia-model-picker__list::-webkit-scrollbar {
  width: 5px;
}

.uia-model-picker__list::-webkit-scrollbar-track {
  background: transparent;
  margin: 0.25rem 0;
}

.uia-model-picker__list::-webkit-scrollbar-thumb {
  background-color: rgba(148, 163, 184, 0.42);
  border-radius: 999px;
  border: 1px solid transparent;
  background-clip: padding-box;
  transition: background-color 0.18s ease;
}

.uia-model-picker__list:hover::-webkit-scrollbar-thumb {
  background-color: rgba(37, 99, 235, 0.38);
}

.uia-model-picker__list::-webkit-scrollbar-thumb:hover {
  background-color: rgba(29, 78, 216, 0.52);
}

.uia-model-picker__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.625rem;
  border-radius: 0.5rem;
  font-size: 0.8125rem;
  line-height: 1.35;
  color: #334155;
  cursor: pointer;
  user-select: none;
  transition: background 0.12s ease, color 0.12s ease;
}

.uia-model-picker__item-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.uia-model-picker__item:hover,
.uia-model-picker__item.is-focused {
  background: #f5f3ff;
  color: #5b21b6;
}

.uia-model-picker__item.is-selected {
  background: #ede9fe;
  color: #1d4ed8;
  font-weight: 500;
}

.uia-model-picker__item-check {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  opacity: 0;
  color: #2563eb;
}

.uia-model-picker__item.is-selected .uia-model-picker__item-check {
  opacity: 1;
}

.uia-model-picker__empty {
  padding: 0.75rem 0.625rem;
  font-size: 0.8125rem;
  color: #94a3b8;
  text-align: center;
}

.uia-model-picker__native {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}