.side {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  mask-image: none;
  padding-bottom: 1.2rem;
}
.side-nav { display: flex; flex-direction: column; min-height: 0; flex: 1; margin-top: 0; }
.side-context { flex-shrink: 0; padding: .45rem .9rem .9rem; color: var(--ink); font: 600 .95rem/1.5 var(--body); }
.side-route-link { flex-shrink: 0; display: block; margin: -.4rem .45rem .55rem; padding: .45rem; color: var(--muted); font: .78rem/1.5 var(--body); text-decoration: none; }
.side-route-link:hover { color: var(--link); text-decoration: underline; text-underline-offset: 3px; }
.side-nav [hidden] { display: none !important; }
.side button { cursor: pointer; }
.side button:hover:not(:disabled) { color: var(--ink); }
.side button:disabled { opacity: .45; cursor: default; }
.side :is(button, select, summary, a, input):focus-visible { outline: 2px solid var(--ember); outline-offset: 2px; }
.side-scroll { min-height: 0; flex: 1; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; padding: 0 .35rem .8rem; }
.side-scroll .nav { margin-top: 0; }
.side-scroll .nav .zone { margin-top: .65rem; padding-top: .35rem; }
.side-scroll .nav .zone:first-child { margin-top: .15rem; border-top: 0; }
.side-scroll .nav .zone {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem;
  padding: 1rem .6rem .5rem;
  margin-top: .9rem;
  font: 600 .8rem/1.5 var(--body);
  letter-spacing: 0;
  color: var(--muted);
}
.side-scroll .nav .zone.is-current { color: var(--ink); }
.side-scroll .nav .zone small { font: 400 .65rem/1.5 var(--body); color: var(--ember); }
.side-directory-actions {
  display: flex;
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--panel);
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  padding: .2rem .55rem .6rem;
}
.side-directory-actions button {
  border: 0;
  background: transparent;
  padding: .4rem .1rem;
  color: var(--muted);
  font: .72rem/1.5 var(--body);
  min-height: 36px;
}
.side-directory-actions[hidden] { display: none; }
@media (pointer: coarse) {
  .side-directory-actions button { min-height: 44px; }
}
.nav .sec { margin-bottom: .15rem; }
.nav .grp-body { padding: .25rem 0 .4rem .55rem; }
.nav .grp-single > [data-grp] > .grp-body { padding: 0; }
.side-empty { padding: .7rem; color: var(--muted); font: .8rem/1.7 var(--body); }
.side-page-toc ul { list-style: none; margin: 0; padding: 0; }
.side-page-toc ul ul { padding-left: .75rem; }
.side-page-toc a { display: block; padding: .45rem .65rem; color: var(--ink-soft); text-decoration: none; font: .82rem/1.6 var(--body); border-radius: 6px; }
.side-page-toc a:hover { background: var(--ember-bg); }
.nav details[data-chapter] > summary { padding: .45rem .5rem; font-size: .77rem; font-weight: 500; letter-spacing: 0; }
.nav details[data-chapter] > summary .grp-count { background: none; font-size: .65rem; }
.chapter-chevron { display: inline-block; font-size: 1rem; line-height: 1; color: var(--faint); transition: transform .15s; }
.nav details[data-chapter][open] > summary .chapter-chevron { transform: rotate(90deg); }
.nav .chapter-pages { margin: .2rem 0 .4rem; padding-left: .55rem; }
.nav .sec-flat > .chapter-pages { padding-left: 0; }
.nav .chapter-pages > li > a {
  display: block; margin: .12rem 0; padding: .36rem .55rem .36rem .7rem;
  font-size: .82rem; line-height: 1.5; color: var(--ink-soft); text-decoration: none;
  border-radius: 7px; overflow-wrap: anywhere;
}
.nav .chapter-pages > li > a:hover { background: var(--rule-soft); color: var(--ink); }
.nav .chapter-pages > li > a.active { background: var(--ember-bg); color: var(--ink); box-shadow: inset 2px 0 var(--ember); font-weight: 600; }
.nav details:has(a.active) > summary .grp-name::after { content: " ·"; color: var(--ember); }
.note-tools { display: flex; flex-wrap: wrap; gap: .65rem 1.2rem; align-items: baseline; margin-top: 1.2rem; font: .78rem/1.6 var(--sans); }
.note-tools[hidden], .note-tools [hidden] { display: none !important; }
.note-tools button { padding: .35rem 0; border: 0; background: none; font: inherit; color: var(--muted); cursor: pointer; }
.note-tools button[aria-pressed="true"] { color: var(--ember); }
.note-tools .note-resume { min-width: 0; max-width: 100%; overflow-wrap: anywhere; color: var(--ink-soft); }
.note-tool-status { flex-basis: 100%; color: var(--muted); }
.note-tool-status:empty { display: none; }
.note-tools :is(button, a):focus-visible { outline: 2px solid var(--ember); outline-offset: 4px; }
.article-kicker a { color: inherit; }
.page-turn-context { grid-column: 1 / -1; }
.page-turn .page-turn-context a { display: inline; min-height: 0; padding: .2rem 0; border: 0; border-radius: 0; background: none; color: var(--muted); font: .78rem/1.6 var(--sans); }
.page-turn .page-turn-context a:hover { color: var(--ink); transform: none; }
@media (max-width: 1080px) {
  .side { padding: 1rem .65rem max(.75rem, env(safe-area-inset-bottom)); }
  .side-context { padding-top: .25rem; }
  .nav details > summary, .nav .chapter-pages > li > a { min-height: 2.5rem; }
}
@media (max-height: 560px) {
  .side-context { padding-bottom: .3rem; }
}
@media (prefers-reduced-motion: reduce) { .chapter-chevron { transition: none; } }