#app { height: 100dvh; }

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  height: 100dvh;
  transition: grid-template-columns 200ms var(--ease);
}
.app-shell.sidebar-hidden { grid-template-columns: 0 minmax(0, 1fr); }
.app-shell.resizing { transition: none; user-select: none; cursor: col-resize; }

/* Sidebar */
.sidebar {
  grid-column: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100dvh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--line);
  overflow: hidden;
  color: var(--text-2);
  font-size: 14px;
}
.sidebar-hidden .sidebar { visibility: hidden; }
.sidebar-head { display: flex; align-items: center; gap: 4px; padding: 8px 8px 4px; }
.ws-button {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 8px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  font-weight: 600;
  text-align: left;
}
.ws-button:hover { background: var(--bg-hover); }
.ws-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ws-caret { color: var(--text-3); }
.sidebar-close { opacity: 0; transition: opacity var(--dur); }
.sidebar:hover .sidebar-close, .sidebar-close:focus-visible { opacity: 1; }

.sidebar-nav, .sidebar-foot { display: flex; flex-direction: column; padding: 2px 8px; gap: 1px; }
.sidebar-foot { border-top: 1px solid var(--line); padding-top: 6px; padding-bottom: 8px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 32px;
  padding: 0 8px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-2);
  font-weight: 500;
  text-align: left;
}
.nav-item:hover { background: var(--bg-hover); color: var(--text); }
.nav-item[aria-current="page"] { background: var(--bg-active); color: var(--text); }
.nav-item > span { flex: 1; }
.nav-kbd { font-size: 11px; color: var(--text-3); border: 0; background: transparent; padding: 0; opacity: 0; }
.nav-item:hover .nav-kbd { opacity: 1; }
.powered { font-size: 11.5px; color: var(--text-3); text-decoration: none; padding: 6px 8px 0; }
.powered:hover { color: var(--text-2); text-decoration: underline; }

.sidebar-scroll { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 6px 8px 12px; }
.side-section { margin-top: 10px; }
.section-head { display: flex; align-items: center; height: 28px; }
.section-toggle {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 4px;
  height: 26px;
  padding: 0 8px;
  border: 0;
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 600;
  text-align: left;
}
.section-toggle:hover { color: var(--text-2); background: var(--bg-hover); }
.section-caret { opacity: 0; transition: transform var(--dur), opacity var(--dur); }
.section-toggle:hover .section-caret, .section-toggle:focus-visible .section-caret { opacity: 1; }
.collapsed .section-caret { transform: rotate(-90deg); opacity: 1; }
.section-add { width: 26px; height: 26px; opacity: 0; }
.side-section:hover .section-add, .section-add:focus-visible { opacity: 1; }

.tree { display: flex; flex-direction: column; }
.tree-row { outline: none; border-radius: var(--radius); }
.row-inner {
  --depth: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 4px 0 calc(4px + var(--depth) * 14px);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-2);
  user-select: none;
}
.row-inner:hover { background: var(--bg-hover); }
.tree-row:focus-visible > .row-inner { outline: 2px solid var(--focus); outline-offset: -2px; }
.tree-row.current > .row-inner { background: var(--bg-active); color: var(--text); font-weight: 500; }
.row-toggle {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  padding: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--text-3);
  flex: none;
}
.row-toggle:hover:not(:disabled) { background: var(--bg-active); color: var(--text); }
.row-toggle:disabled { cursor: pointer; }
.row-toggle.spacer { display: inline-block; }
.row-toggle .icon { transition: transform var(--dur) var(--ease); }
.tree-row[aria-expanded="true"] > .row-inner .row-toggle .icon { transform: rotate(90deg); }
.row-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row-badge { color: var(--text-3); display: inline-flex; }
.row-actions { display: none; gap: 0; margin-left: auto; }
.row-inner:hover .row-actions, .tree-row:focus-within > .row-inner .row-actions { display: inline-flex; }
.row-btn { width: 24px; height: 24px; }
.row-btn:hover { background: var(--bg-active) !important; }
.row-rename { flex: 1; min-width: 0; height: 24px; padding: 0 6px; border: 1px solid var(--focus); border-radius: 4px; background: var(--bg-input); outline: none; }
.tree-row.pending .row-inner { cursor: default; opacity: 0.75; }
.warn { color: var(--warning); }
.tree-empty { display: flex; align-items: center; gap: 8px; height: 30px; padding: 0 8px; border: 0; border-radius: var(--radius); background: transparent; color: var(--text-3); width: 100%; text-align: left; }
.tree-empty:hover { background: var(--bg-hover); color: var(--text-2); }
.tree-row.dragging > .row-inner { opacity: 0.4; }
.row-inner.drop-inside { background: var(--bg-selected); outline: 1px solid var(--accent); outline-offset: -1px; }
.tree-drop { position: fixed; z-index: 300; height: 2px; background: var(--accent); border-radius: 2px; pointer-events: none; }
.tree-dragging { cursor: grabbing; }

.sidebar-resizer { position: absolute; z-index: 20; top: 0; bottom: 0; right: 0; width: 6px; cursor: col-resize; outline: none; }
.sidebar-resizer:hover::before, .sidebar-resizer:focus-visible::before, .resizing .sidebar-resizer::before { content: ""; position: absolute; top: 0; bottom: 0; right: 0; width: 2px; background: var(--accent); }
.sidebar-hidden .sidebar-resizer { display: none; }
.scrim { display: none; }

/* Main column */
.main { grid-column: 2; display: flex; flex-direction: column; min-width: 0; height: 100dvh; outline: none; background: var(--bg); }
.topbar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: var(--topbar-h);
  padding: 0 10px 0 12px;
  flex: none;
  background: var(--bg);
  border-bottom: 1px solid transparent;
}
.page-scroll { flex: 1; overflow-y: auto; overflow-x: hidden; position: relative; scroll-padding-top: 24px; container-type: inline-size; }
.crumbs { flex: 1; min-width: 0; overflow: hidden; }
.crumb-list { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; min-width: 0; }
.crumb-list li { display: flex; align-items: center; min-width: 0; }
.crumb-list li + li::before { content: "/"; color: var(--text-disabled); margin: 0 2px; flex: none; }
.crumb-list li.crumb-space + li::before { content: ""; margin: 0; }
.crumb-space { color: var(--text-3); padding: 0 4px; flex: none; }
.crumb {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  max-width: 220px;
  height: 28px;
  padding: 0 6px;
  border: 0;
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--text-2);
}
.crumb:hover { background: var(--bg-hover); color: var(--text); }
.crumb span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.crumb.current { color: var(--text); }
.topbar-right { display: flex; align-items: center; gap: 4px; flex: none; }
.presence { display: flex; align-items: center; padding-right: 6px; }
.presence .avatar { margin-left: -6px; outline: 2px solid var(--bg); cursor: default; }
.presence .avatar:first-child { margin-left: 0; }
.presence .avatar.away { opacity: 0.55; }
.presence .avatar.more { background: var(--bg-subtle); color: var(--text-2); font-size: 11px; }
.save-status { display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 6px; color: var(--text-3); font-size: 12.5px; }
.save-status[data-status="error"], .save-status[data-status="offline"] { color: var(--warning); }
.save-status[data-status="saving"] .icon { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }
.status-text { white-space: nowrap; max-width: 220px; overflow: hidden; text-overflow: ellipsis; }
.save-status[data-status="saving"] .status-text { display: none; }
.share-btn.shared { color: var(--accent-text); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.icon-btn.on .icon { fill: #e9b93a; color: #d19b12; }
.sidebar-open { flex: none; }

/* Phones and small tablets: the sidebar becomes a drawer. */
@media (max-width: 760px) {
  .app-shell, .app-shell.sidebar-hidden { grid-template-columns: 0 minmax(0, 1fr); }
  .sidebar {
    position: fixed;
    z-index: 100;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(320px, 86vw);
    visibility: visible;
    transform: translateX(0);
    transition: transform 220ms var(--ease);
  }
  .sidebar-hidden .sidebar { transform: translateX(-102%); visibility: hidden; transition: transform 220ms var(--ease), visibility 0s 220ms; }
  .sidebar-close { opacity: 1; }
  .sidebar-resizer { display: none; }
  .scrim { display: block; position: fixed; inset: 0; z-index: 90; background: rgba(10, 10, 14, 0.4); transition: opacity 200ms; }
  .sidebar-hidden .scrim { opacity: 0; pointer-events: none; }
  .row-actions { display: inline-flex; }
  .row-inner, .nav-item { height: 38px; }
  .topbar { padding: 0 6px; padding-top: env(safe-area-inset-top); height: calc(var(--topbar-h) + env(safe-area-inset-top)); }
  .save-status .status-text { display: none; }
  .share-btn span { display: none; }
  .share-btn { width: 32px; padding: 0; border-color: transparent; }
  .crumb { max-width: 46vw; }
  .crumb-list li:not(:last-child):not(.crumb-space) { display: none; }
  .crumb-list li::before { display: none; }
  .nav-kbd { display: none; }
}

.main-body { flex: 1; min-height: 0; display: flex; }
.main-body .page-scroll { flex: 1; min-width: 0; }
.comments-btn { width: auto; min-width: 30px; padding: 0 6px; gap: 3px; }
.comments-count { font-size: 12px; font-weight: 600; color: var(--accent-text); }
.comments-count:empty { display: none; }
.comments-btn[aria-pressed="true"] { background: var(--bg-active); color: var(--text); }