body {
  background: var(--theme-background);
  color: var(--theme-text);
}
.document-directory h2 { font-size: 28px; margin: 24px 0; }
#document-list { list-style: none; }
#document-list li { border-bottom: 1px solid var(--theme-border); }
#document-list a { display: block; padding: 20px 0; line-height: 1.5; overflow-wrap: anywhere; }
#document-list a:hover { color: var(--theme-accent); }
#document-status { padding: 24px 0; line-height: 1.6; }
.document-reader { height: 100dvh; display: flex; flex-direction: column; }
.document-navigation { padding: 16px 24px; border-bottom: 1px solid var(--theme-border); flex-shrink: 0; }
.document-navigation nav { display: flex; flex-wrap: wrap; gap: 12px 24px; }
.document-navigation h1 { margin-top: 12px; font-size: 18px; line-height: 1.5; overflow-wrap: anywhere; }
.document-reader #document-status { padding: 24px; }
.document-viewport { --feishu-toolbar-height: 64px; flex: 1; min-height: 0; overflow: hidden; }
.document-viewport iframe { display: block; width: 100%; height: calc(100% + var(--feishu-toolbar-height)); border: 0; transform: translateY(calc(-1 * var(--feishu-toolbar-height))); }
@media (max-width: 600px) {
  .document-directory { padding-top: 24px; }
  .document-navigation { padding: 12px 16px; }
}