/*
 * text-diagram lightbox 样式
 * 所有选择器以 td-lb- 前缀并限定在弹窗容器内，不影响博客主题
 */

.td-lb-overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2147483000;
  display: none;
  background: rgba(0, 0, 0, 0.8);
}

.td-lb-overlay.td-lb-open {
  display: block;
}

.td-lb-stage {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  overflow: hidden;
  touch-action: none;
  cursor: grab;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.td-lb-content {
  position: absolute;
  left: 50%;
  top: 50%;
  box-sizing: border-box;
  padding: 12px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.45);
  will-change: transform;
}

/* 覆盖 mermaid svg 的内联 max-width / width，尺寸由弹窗容器控制 */
.td-lb-content svg,
.td-lb-content img {
  width: 100% !important;
  height: 100% !important;
  max-width: none !important;
  max-height: none !important;
  display: block;
}

.td-lb-content img {
  object-fit: contain;
}

/* 暗黑模式底色：标记类由 JSInjector 注入的初始化脚本切换 */
.td-lb-dark .td-lb-content {
  background: #18181c;
}

.td-lb-btn {
  margin: 0;
  border: none;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: background 0.15s;
}

.td-lb-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.td-lb-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 26px;
  line-height: 1;
}

.td-lb-toolbar {
  position: absolute;
  left: 50%;
  bottom: calc(18px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  display: none;
  gap: 12px;
}

.td-lb-toolbar .td-lb-btn {
  width: auto;
  height: 44px;
  padding: 0 22px;
  border-radius: 22px;
}

/* 触屏设备显示底部工具条（重置 / 关闭），桌面端用双击重置 + Esc */
@media (pointer: coarse) {
  .td-lb-toolbar {
    display: flex;
  }
}