/* ===== 模型下拉：仿截图的 popover 菜单 ===== */
.model-dd {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.model-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card-bg-soft);
  color: var(--text-main);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
  width: 210px;
  justify-content: space-between;
}

.model-trigger:hover {
  background: #f3f4f6;
}

.model-trigger:active {
  transform: translateY(1px);
}

.model-trigger:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.08);
  border-color: rgba(17, 24, 39, 0.25);
}

.model-trigger-text {
  font-weight: 600;
  flex: 1 1 auto;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: left;
}

.chev {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 1px;
}

.model-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  width: 230px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.10);
  padding: 8px;
  display: none;
  z-index: 50;
  overflow: visible;
}

.model-menu.open {
  display: block;
  animation: pop 120ms ease-out;
}

/* ===== 模型二级菜单 ===== */
.model-submenu {
  position: fixed;
  top: 0;
  left: 0;
  width: 220px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.10);
  padding: 8px;
  display: none;
  z-index: 9999;
}

.model-submenu.open {
  display: block;
  animation: pop 120ms ease-out;
}

.model-submenu .submenu-item {
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.model-submenu .submenu-item:hover {
  background: #f3f4f6;
}

@keyframes pop {
  from {
    opacity: 0;
    transform: translateY(-4px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.menu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 10px;
  border-radius: 12px;
  cursor: pointer;
  user-select: none;
}

.menu-item:hover {
  background: #f3f4f6;
}

.menu-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.menu-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.menu-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.menu-right {
  display: flex;
  align-items: center;
  min-width: 18px;
  justify-content: flex-end;
}

.check {
  opacity: 0;
  font-weight: 700;
  color: var(--text-main);
}

.menu-item.selected .check {
  opacity: 1;
}

.menu-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 6px;
}

.menu-item-muted {
  cursor: default;
  opacity: 0.8;
}

.menu-item-muted:hover {
  background: transparent;
}

.arrow {
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
}

/* 小屏响应式 */
@media (max-width: 640px) {
  .model-trigger {
    width: 180px;
  }

  .model-menu {
    width: 205px;
  }
}