.classic-tab {
  position: fixed;
  z-index: 15;
  top: 50%;
  left: 0;
  display: grid;
  place-items: center;
  width: 44px;
  min-height: 11rem;
  padding: 1rem 4px;
  border: 1px solid var(--accent);
  border-left: 0;
  border-radius: 0 .5rem .5rem 0;
  color: var(--ink);
  background: var(--paper);
  box-shadow: .2rem .1rem .8rem rgb(0 0 0 / .16);
  font: 600 .8rem/1.2 "Barlow", system-ui, sans-serif;
  letter-spacing: .04em;
  cursor: pointer;
  transform: translateY(-50%);
}
.classic-tab[hidden] { display: none; }
.classic-tab span { writing-mode: vertical-rl; text-orientation: upright; text-transform: uppercase; }
.classic-tab:hover { background: color-mix(in srgb, var(--accent-text) 8%, var(--paper)); }
.classic-tab:focus-visible,
.classic-close:focus-visible,
.classic-folder summary:focus-visible,
.classic-tree a:focus-visible { outline: 3px solid var(--accent-text); outline-offset: -4px; }
html:has(.classic-navigation[open]) { overflow: hidden; }
.classic-navigation {
  position: fixed;
  inset: 0 auto 0 0;
  width: min(25rem, calc(100vw - 48px));
  height: 100dvh;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  overflow: visible;
  border: 1px solid var(--accent);
  border-left: 0;
  color: var(--ink);
  background: var(--paper);
  box-shadow: .5rem 0 2rem rgb(0 0 0 / .22);
  font-family: "Barlow", system-ui, sans-serif;
  transform: translateX(calc(-100% - 44px));
  transition: transform 280ms cubic-bezier(.22, 1, .36, 1),
    display 280ms allow-discrete, overlay 280ms allow-discrete;
}
.classic-navigation[open] { display: flex; flex-direction: column; transform: translateX(0); }
.classic-navigation::backdrop {
  background: rgb(0 0 0 / .45);
  opacity: 0;
  transition: opacity 280ms ease, display 280ms allow-discrete, overlay 280ms allow-discrete;
}
.classic-navigation[open]::backdrop { opacity: 1; }
@starting-style {
  .classic-navigation[open] { transform: translateX(calc(-100% - 44px)); }
  .classic-navigation[open]::backdrop { opacity: 0; }
}
.classic-tab-close { position: absolute; left: 100%; }
.classic-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  flex: 0 0 auto;
  align-items: center;
  gap: .5rem;
  padding: clamp(.75rem, 3vw, 1.25rem);
}
.classic-eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  overflow-wrap: anywhere;
}
.classic-heading h2 { grid-column: 1 / -1; margin: 0; font-size: 1.25rem; font-weight: 600; line-height: 1.2; overflow-wrap: anywhere; }
.classic-subtitle { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: .875rem; line-height: 1.4; }
.classic-close {
  grid-column: 2;
  grid-row: 1;
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: .75rem;
  border: 0;
  border-radius: .4rem;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
}
.classic-close:hover { background: var(--popover-hover); }
.classic-close svg { width: 1.1rem; height: 1.1rem; fill: none; stroke: currentColor; stroke-width: 1.5; }
.classic-scroll {
  flex: 1 1 auto;
  min-height: 0;
  padding: 1rem 1rem 2rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--muted) var(--paper);
}
.classic-tree,
.classic-tree ul { margin: 0; padding: 0; list-style: none; }
.classic-folder { margin-top: .75rem; }
.classic-folder summary { display: block; min-height: 2.75rem; border-radius: .3rem; cursor: pointer; list-style: none; }
.classic-folder summary::marker { content: ""; }
.classic-folder summary:hover { background: var(--popover-hover); }
.classic-folder-label {
  display: flex;
  align-items: center;
  gap: .6rem;
  min-height: 2.75rem;
  padding: .5rem;
  font-size: .95rem;
  font-weight: 600;
}
.classic-folder-icon,
.classic-page-icon { display: block; width: 1.4rem; height: 1.2rem; stroke: var(--muted); stroke-width: 1.25; stroke-linejoin: round; }
.classic-folder-icon { flex: 0 0 auto; fill: color-mix(in srgb, var(--ink) 6%, var(--paper)); stroke: light-dark(var(--ink), #fff); }
.classic-folder-open { display: none; }
.classic-folder details[open] .classic-folder-icon { stroke: var(--accent); }
.classic-folder details[open] .classic-folder-closed { display: none; }
.classic-folder details[open] .classic-folder-open { display: initial; }
.classic-folder-label > span { min-width: 0; overflow-wrap: anywhere; }
.classic-folder details > ul { margin-left: 1.1rem; padding-left: .6rem; }
.classic-folder details > ul > .classic-page { position: relative; }
.classic-folder details > ul > .classic-page::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -.6rem;
  width: 1px;
  background: color-mix(in srgb, var(--accent-text) 45%, transparent);
  content: "";
}
.classic-folder details > ul > .classic-page:last-child::before { bottom: auto; height: 1.3rem; }
.classic-tree a {
  position: relative;
  display: grid;
  grid-template-columns: 1.4rem minmax(0, 1fr);
  gap: .15rem .6rem;
  align-items: start;
  min-height: 2.75rem;
  padding: .7rem .6rem;
  border-radius: .3rem;
  color: var(--ink);
  font-size: .875rem;
  line-height: 1.45;
  text-decoration: none;
  overflow-wrap: anywhere;
}
.classic-folder .classic-page > a::before { position: absolute; top: 1.3rem; left: -.6rem; width: .6rem; height: 1px; background: color-mix(in srgb, var(--accent-text) 45%, transparent); content: ""; }
.classic-tree a:hover { background: var(--popover-hover); text-decoration: underline; }
.classic-tree a[aria-current="page"] { background: color-mix(in srgb, var(--accent-text) 10%, var(--paper)); box-shadow: inset 2px 0 var(--accent-text); }
.classic-page-icon { margin-top: .05rem; fill: none; }
.classic-current { grid-column: 2; color: var(--accent-text); font-size: .75rem; font-weight: 600; }
@media (max-height: 28rem) {
  .classic-heading { padding-top: .75rem; padding-bottom: .75rem; }
  .classic-tab { min-height: 9rem; }
}
@media (prefers-reduced-motion: reduce) {
  .classic-navigation,
  .classic-navigation::backdrop { transition: none; }
}