.folder-layout-control svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}
.folder-page-dialog {
  position: fixed;
  inset: 0;
  margin: auto;
  width: min(640px, calc(100vw - 40px));
  max-height: calc(100vh - 48px);
  box-sizing: border-box;
  overflow: auto;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 24px;
  background: var(--color-surface, #fff);
  color: var(--color-text);
}
.folder-page-dialog::backdrop { background: rgb(0 0 0 / 35%); }
.folder-page-dialog h2 { margin: 0 0 12px; font-size: 20px; }
.folder-page-dialog label { display: grid; gap: 7px; margin-top: 16px; font-size: 14px; }
.folder-page-dialog input, .folder-page-dialog select {
  width: 100%; box-sizing: border-box; padding: 9px;
  border: 1px solid var(--color-border); border-radius: 4px;
  background: var(--color-surface, #fff); color: var(--color-text);
}
.folder-page-dialog select option { padding: 6px; }
.folder-page-dialog-status { min-height: 1.5em; color: var(--color-text-muted); font-size: 13px; }
.folder-page-dialog-actions { display: flex; justify-content: flex-end; gap: 10px; }
.folder-page-dialog button, .folder-custom-page > button {
  padding: 8px 18px; border: 1px solid var(--color-border); border-radius: 4px;
  background: var(--color-surface, #fff); color: var(--color-text); cursor: pointer;
}
.folder-page-dialog button[type="submit"] { background: var(--color-primary); color: #fff; }
.folder-custom-page {
  display: flex; flex-direction: column; width: 100%; height: 100%; min-height: 0;
  overflow: hidden; position: relative;
}
.folder-custom-page > iframe {
  flex: 1 1 0; border: 0; width: 100%; height: 100%; min-height: 0; background: #fff;
}
.folder-custom-status { padding: 24px; margin: 0; }
.folder-layout-control button:focus-visible,
.folder-page-card:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}
#pageContent.folder-layout-page {
  display: block;
}
.folder-page {
  width: 100%;
  min-width: 0;
  padding: 24px var(--folder-side-margin, 15px);
  box-sizing: border-box;
}
.folder-page-grid {
  display: grid;
  grid-template-columns: repeat(var(--folder-columns, 1), minmax(0, var(--folder-card-width, 280px)));
  column-gap: var(--folder-horizontal-gap, 15px);
  row-gap: var(--folder-vertical-gap, 30px);
  justify-content: space-between;
  align-items: start;
}
.folder-page-grid[data-columns="1"] {
  justify-content: center;
}
.folder-page-column {
  display: flex;
  flex-direction: column;
  gap: var(--folder-vertical-gap, 30px);
  min-width: 0;
}
.folder-page-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  min-width: 0;
  color: var(--color-text);
  text-decoration: none;
  text-align: center;
  border-radius: 5px;
}
.folder-page-card:hover {
  color: var(--color-primary);
}
.folder-page-card:hover .folder-page-card-name {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.folder-page-image-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: var(--folder-image-ratio, 280 / 280);
}
.folder-page-image-frame {
  display: block;
  position: relative;
  overflow: hidden;
  border-radius: 5px;
}
#pageContent .folder-page-card .folder-page-image-frame img {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  max-width: 100%;
  height: 100%;
  max-height: 100%;
  object-fit: contain;
  object-position: center;
  margin: 0;
  border-radius: 5px;
}
.folder-page-card-name {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  height: 3.3em;
  flex-shrink: 0;
  font-size: 14px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}
.folder-page[data-text-style="calculation"] .folder-page-card-name {
  /* Calculation typography with regular-weight preview titles. */
  height: 3.2em;
  font-family: "Times New Roman", "SimSun", "宋体", serif;
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
  color: #0000cc;
  text-decoration: underline;
}
:root[data-color-mode="dark"] .folder-page[data-text-style="calculation"] .folder-page-card-name {
  color: #79b8ff;
}
/* Folder previews: match the sidebar's blue title and underline on hover. */
.folder-page-ad-hover .folder-page-card:hover {
  color: var(--color-text);
}
.folder-page.folder-page-ad-hover .folder-page-card-name,
:root[data-color-mode="dark"] .folder-page.folder-page-ad-hover .folder-page-card-name {
  color: #000;
  text-decoration: none;
}
.folder-page-ad-hover .folder-page-image-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  border-radius: inherit;
  pointer-events: none;
}
.folder-page-ad-hover .folder-page-image-frame img {
  transition: transform 240ms ease;
  transform-origin: center;
}
@media (hover: hover) and (pointer: fine) {
  .folder-page-ad-hover .folder-page-card:hover .folder-page-image-frame img {
    transform: scale(1.05);
  }
  .folder-page-ad-hover .folder-page-card:hover .folder-page-image-frame::after {
    border-color: #245dcc;
  }
  .folder-page.folder-page-ad-hover .folder-page-card:hover .folder-page-card-name,
  :root[data-color-mode="dark"] .folder-page.folder-page-ad-hover .folder-page-card:hover .folder-page-card-name {
    color: #245dcc;
    text-decoration: underline;
  }
}
.folder-page-ad-hover .folder-page-card:focus-visible .folder-page-image-frame img {
  transform: scale(1.05);
}
.folder-page-ad-hover .folder-page-card:focus-visible .folder-page-image-frame::after {
  border-color: #245dcc;
}
.folder-page.folder-page-ad-hover .folder-page-card:focus-visible .folder-page-card-name,
:root[data-color-mode="dark"] .folder-page.folder-page-ad-hover .folder-page-card:focus-visible .folder-page-card-name {
  color: #245dcc;
  text-decoration: underline;
}
@media (prefers-reduced-motion: reduce) {
  .folder-page-ad-hover .folder-page-image-frame img { transition: none; }
}
.folder-page-grid:not([data-sizing="both"]) .folder-page-image-slot { aspect-ratio: auto; }
#pageContent .folder-page-grid:not([data-sizing="both"]) .folder-page-image-frame img {
  position: static; max-width: none; max-height: none;
}
.folder-page-grid[data-sizing="height"], .folder-page-grid[data-sizing="natural"] {
  grid-template-columns: repeat(var(--folder-columns, 1), var(--folder-card-width));
}
.folder-page-grid[data-sizing="height"][data-columns="1"],
.folder-page-grid[data-sizing="natural"][data-columns="1"] { justify-content: start; }
.folder-frame-fields input[type="checkbox"] { width: 15px; height: 15px; padding: 0; accent-color: var(--color-primary); }
.folder-frame-fields input:disabled { opacity: .5; cursor: not-allowed; }
.folder-frame-fields { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 12px; }
.folder-frame-fields label { display: flex; align-items: center; gap: 6px; font-size: 12px; }
.folder-frame-fields input[type="number"] { width: 75px; }
.folder-frame-fields input[type="text"] { width: 90px; }
.folder-frame-fields input, .folder-frame-fields select { border: 1px solid var(--color-border); border-radius: 4px; padding: 4px; background: var(--color-surface); color: var(--color-text); }
.folder-page-empty {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--color-text-muted);
  text-align: center;
}
.folder-page-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
  font-size: 14px;
}
.folder-page-pagination button {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text);
  background: var(--color-surface);
  cursor: pointer;
}
.folder-page-pagination button:disabled {
  opacity: 0.45;
  cursor: default;
}
@media (max-width: 600px) {
  .folder-page { padding: 16px var(--folder-side-margin, 15px); }
}