/**
 * 聊天区背景：默认深色 / 浅色 / 纯白 / 自定义图片
 * 由 html[data-chat-bg] 与 .chat-main-column 联用
 */

.chat-main-column.chat-bg-surface-dark {
  background-color: #0b0d12;
}

.chat-main-column.chat-bg-surface-light {
  background-color: #f1f5f9;
}

.chat-main-column.chat-bg-surface-white {
  background-color: #ffffff;
}

.chat-main-column.chat-bg-surface-image {
  background-color: #0b0d12;
  background-image: var(--chat-bg-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* 图片背景时聊天窗半透明，露出底图 */
html.chat-bg-image .chat-window-pane {
  background: transparent !important;
}

html.chat-bg-image .chat-window-scroller {
  background: transparent !important;
}

html.chat-bg-image .chat-window-header,
html.chat-bg-image .chat-window-composer,
html.chat-bg-image .chat-window-pending {
  background: rgba(15, 17, 21, 0.88) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

html.chat-bg-image.chat-theme-light .chat-window-header,
html.chat-bg-image.chat-theme-light .chat-window-composer,
html.chat-bg-image.chat-theme-light .chat-window-pending {
  background: rgba(255, 255, 255, 0.9) !important;
}

html.chat-bg-white .chat-window-pane.chat-window-pane--solid {
  background-color: #ffffff !important;
}

html.chat-bg-white .chat-window-header,
html.chat-bg-white .chat-window-composer {
  background-color: #ffffff !important;
  border-color: #e2e8f0 !important;
}

html.chat-bg-white .chat-window-scroller {
  background-color: #ffffff !important;
}