/* GPT-style folder navigation: fixed Settings footer with only the content area scrolling. */
.platform-nav > a[href="/app/projects"][hidden]{display:none!important}
.platform-nav > a[href="/app/about"]{
  --platform-nav-icon:url("https://cdn.jsdelivr.net/npm/lucide-static@1.28.0/icons/circle-question-mark.svg");
}
.platform-sidebar{
  display:flex!important;
  flex-direction:column!important;
  height:100dvh!important;
  max-height:100dvh!important;
  min-height:0!important;
  overflow:hidden!important;
}
.platform-sidebar>.platform-brand{
  flex:0 0 auto!important;
}
.sidebar-scroll-region{
  flex:1 1 auto!important;
  min-height:0!important;
  overflow-x:hidden!important;
  overflow-y:auto!important;
  overscroll-behavior:contain;
  scrollbar-width:thin;
}
.platform-sidebar>.platform-side-meta,
.platform-mobile-drawer>.platform-side-meta{
  flex:0 0 auto!important;
  margin-top:0!important;
}
.sidebar-project-section{
  display:grid;
  gap:2px;
  margin:2px 0 0;
  color:var(--ex-text,var(--platform-text));
}
.sidebar-project-heading,
.sidebar-project-summary,
.sidebar-project-history-link,
.sidebar-project-more-history,
.sidebar-project-more-projects{
  font:inherit;
  color:inherit;
}
.sidebar-project-heading{
  min-height:40px;
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 10px;
  border-radius:9px;
  text-decoration:none;
  font-size:14px;
  font-weight:600;
}
.sidebar-project-heading:hover,
.sidebar-project-heading[aria-current="page"]{background:var(--gpt-ui-hover,color-mix(in srgb,currentColor 7%,transparent))}
.sidebar-project-folder-icon{
  width:20px;
  height:20px;
  min-width:20px;
  background:currentColor;
  -webkit-mask:url("https://cdn.jsdelivr.net/npm/lucide-static@1.28.0/icons/folder.svg") center/20px 20px no-repeat;
  mask:url("https://cdn.jsdelivr.net/npm/lucide-static@1.28.0/icons/folder.svg") center/20px 20px no-repeat;
  opacity:.92;
}
.sidebar-project-list{display:grid;gap:1px;min-width:0}
.sidebar-project-item{min-width:0}
.sidebar-project-summary{
  list-style:none;
  min-height:36px;
  display:grid;
  grid-template-columns:18px minmax(0,1fr) 16px;
  align-items:center;
  gap:7px;
  padding:0 8px 0 14px;
  border-radius:8px;
  cursor:pointer;
  color:var(--ex-muted,var(--platform-muted));
  font-size:13px;
}
.sidebar-project-summary::-webkit-details-marker{display:none}
.sidebar-project-summary:hover{background:var(--gpt-ui-hover,color-mix(in srgb,currentColor 7%,transparent));color:var(--ex-text,var(--platform-text))}
.sidebar-project-summary .sidebar-project-folder-icon{width:18px;height:18px;min-width:18px;-webkit-mask-size:18px 18px;mask-size:18px 18px}
.sidebar-project-name{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sidebar-project-chevron{
  width:16px;
  height:16px;
  background:currentColor;
  -webkit-mask:url("https://cdn.jsdelivr.net/npm/lucide-static@1.28.0/icons/chevron-right.svg") center/16px 16px no-repeat;
  mask:url("https://cdn.jsdelivr.net/npm/lucide-static@1.28.0/icons/chevron-right.svg") center/16px 16px no-repeat;
  transition:transform .14s ease;
  opacity:.72;
}
.sidebar-project-item[open] > .sidebar-project-summary .sidebar-project-chevron{transform:rotate(90deg)}
.sidebar-project-body{display:grid;gap:2px;padding:2px 0 4px 29px;min-width:0}
.sidebar-project-history{display:grid;gap:1px;min-width:0}
.sidebar-project-history-link{
  min-width:0;
  min-height:32px;
  display:flex;
  align-items:center;
  padding:0 8px;
  border-radius:8px;
  text-decoration:none;
  color:var(--ex-muted,var(--platform-muted));
  font-size:12px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.sidebar-project-history-link:hover{background:var(--gpt-ui-hover,color-mix(in srgb,currentColor 7%,transparent));color:var(--ex-text,var(--platform-text))}
.sidebar-project-history-empty,.sidebar-project-state{
  min-height:30px;
  display:flex;
  align-items:center;
  padding:0 8px;
  color:var(--ex-muted,var(--platform-muted));
  font-size:11px;
  opacity:.72;
}
.sidebar-project-more-history,.sidebar-project-more-projects{
  min-height:32px;
  border:0;
  border-radius:8px;
  background:transparent;
  color:var(--ex-muted,var(--platform-muted));
  text-align:left;
  padding:0 8px;
  cursor:pointer;
  font-size:12px;
}
.sidebar-project-more-projects{margin:1px 0 4px 28px}
.sidebar-project-more-history:hover,.sidebar-project-more-projects:hover{background:var(--gpt-ui-hover,color-mix(in srgb,currentColor 7%,transparent));color:var(--ex-text,var(--platform-text))}
.sidebar-project-more-history:disabled{opacity:.5;cursor:default}
.platform-shell.exterior-sidebar-collapsed .sidebar-project-list,
.platform-shell.exterior-sidebar-collapsed .sidebar-project-more-projects{display:none!important}
.platform-shell.exterior-sidebar-collapsed .sidebar-project-heading{
  justify-content:center;
  padding:0;
  font-size:0;
}
.platform-shell.exterior-sidebar-collapsed .platform-nav>a[href="/app/about"]{
  justify-content:center!important;
  padding-inline:0!important;
  font-size:0!important;
}
.platform-shell.exterior-sidebar-collapsed .platform-nav>a[href="/app/about"] .sidebar-about-label{
  display:none!important;
}
.platform-mobile-drawer .sidebar-project-section{margin-top:2px}
.platform-shell .platform-mobile-drawer{
  overflow:hidden!important;
}
.platform-mobile-drawer .sidebar-scroll-region{
  flex:1 1 auto!important;
  min-height:0!important;
  overflow-x:hidden!important;
  overflow-y:auto!important;
}
@media(max-width:760px){
  .platform-sidebar{height:auto!important;max-height:none!important;overflow:hidden!important}
}
@media(prefers-reduced-motion:reduce){.sidebar-project-chevron{transition:none}}