/* Video Wall Manager V1.0 FIX6: fixed top / independently scrollable middle / fixed bottom.
   A presentation-only update: no SQLite changes, no remote dependencies. */
.sidebar{display:flex;flex-direction:column;overflow:hidden;max-height:100vh;max-height:100dvh}
.sidebar .brand{flex:0 0 auto}
.sidebar-top{
  flex:0 1 auto;min-height:0;max-height:min(430px,49vh);max-height:min(430px,49dvh);
  overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;
  border-bottom:1px solid #ffffff25;padding-bottom:10px;
  scrollbar-width:thin;scrollbar-color:#6a8796 transparent;
}
.sidebar-top .sidebar-label{padding:15px 18px 7px;font-size:12px}
.sidebar-top .nav-link{min-height:44px;padding:8px 12px}
.sidebar-top .nav-link .nav-label{font-size:15px}
.sidebar-more{margin:4px 12px 0;min-width:0}
.sidebar-more>summary{display:flex;align-items:center;gap:12px;padding:9px 12px;min-height:43px;border-radius:9px;cursor:pointer;color:#c8dbdf;list-style:none;font-weight:700;font-size:15px;user-select:none}
.sidebar-more>summary::-webkit-details-marker{display:none}
.sidebar-more>summary::marker{content:''}
.sidebar-more>summary:hover,.sidebar-more[open]>summary{background:#ffffff16;color:white}
.sidebar-more>summary .nav-symbol{flex:0 0 23px;width:23px;font-size:21px;line-height:1;text-align:center}
.sidebar-more-label{flex:1}
.sidebar-more-arrow{font-size:12px;transition:transform .18s}
.sidebar-more[open] .sidebar-more-arrow{transform:rotate(180deg)}
.sidebar-more-menu{padding:4px 0 7px;gap:1px}
.sidebar-more-menu .nav-link{min-height:40px;padding:7px 9px}
.sidebar-more-menu .nav-link .nav-label{font-size:14px}
.sidebar-more-menu .nav-link .nav-symbol{font-size:18px}
.sidebar-folders-region{
  flex:1 1 0;min-height:100px;overflow-y:auto;overflow-x:hidden;
  scrollbar-width:thin;scrollbar-color:#7e9da7 transparent;
  overscroll-behavior:contain;position:relative;padding-bottom:10px;
}
.sidebar-folders-region::-webkit-scrollbar,.sidebar-top::-webkit-scrollbar{width:7px}
.sidebar-folders-region::-webkit-scrollbar-thumb,.sidebar-top::-webkit-scrollbar-thumb{background:#68828e;border-radius:7px}
.sidebar-folders-region .sidebar-folders{margin:0 10px 10px;padding-top:0;border-top:0}
.sidebar-folders-region .sidebar-folders-heading{
  position:sticky;top:0;z-index:3;margin:0 -2px 8px;padding:10px 2px 3px;
  background:#233744;border-bottom:1px solid #ffffff18;
}
.sidebar-folders-region .sidebar-folders-body{min-width:0}
.sidebar .sidebar-bottom{flex:0 0 auto;margin-top:0;background:#233744;z-index:4;padding:13px 14px;border-top:1px solid #ffffff35}
.collapsed-folders-launch{display:none}
/* Narrow desktop: still expose a folder icon so the tree remains discoverable. */
@media(min-width:851px){
  .sidebar.is-collapsed .sidebar-folders-region .sidebar-folders{display:none!important}
  .sidebar.is-collapsed .collapsed-folders-launch{display:grid;place-items:center;width:48px;height:48px;min-height:48px;margin:12px auto 0;border:0;border-radius:10px;background:#ffffff14;color:#e4f3f1;font-size:20px;padding:0}
  .sidebar.is-collapsed .collapsed-folders-launch:hover{background:#ffffff2a}
  .sidebar.is-collapsed .sidebar-top .sidebar-label,.sidebar.is-collapsed .sidebar-more-label,.sidebar.is-collapsed .sidebar-more-arrow{display:none!important}
  .sidebar.is-collapsed .sidebar-more{margin:4px 8px 0}
  .sidebar.is-collapsed .sidebar-more>summary{justify-content:center;padding:10px 4px}
  .sidebar.is-collapsed .sidebar-more-menu{display:none!important}
  .sidebar.is-collapsed .sidebar-top{max-height:min(390px,50dvh)}
}
/* Mobile drawer: same three regions; folders scroll without hiding top shortcuts. */
@media(max-width:850px){
  .sidebar{height:100vh;height:100dvh;max-height:100dvh}
  .sidebar-top{max-height:min(420px,45dvh);padding-bottom:8px}
  .sidebar-top .nav-link{min-height:46px}
  .sidebar-folders-region{min-height:100px}
  .sidebar .sidebar-bottom{padding:13px 14px;min-height:65px}
}
@media(max-height:650px){
 .sidebar-top{max-height:44dvh}
 .sidebar .brand{min-height:72px;padding-top:13px;padding-bottom:13px}
 .sidebar .sidebar-bottom{min-height:58px;padding-top:8px;padding-bottom:8px}
 .sidebar-folders-region{min-height:80px}
}
@media(prefers-reduced-motion:reduce){.sidebar-more-arrow{transition:none}}