/**
 * @file sidebar.css
 * Verid — Sidebar
 *
 * Ziel-HTML (aus page.html.twig):
 *   .sidebar-grid.grid-full
 *     div.region-sidebar-wrapper          ← unser Wrapper
 *       div.region.region-sidebar
 *         div.block-menu (oder ähnlich)
 *           h2.block__title  "Buchnavigation"
 *           ul.menu
 *             li.menu-item > a
 *             li.menu-item > a
 *             ...
 *     main.site-main
 */

/* ─── Sticky Wrapper ────────────────────────────────────── */
.region-sidebar-wrapper {
  position: sticky;
  top: calc(var(--verid-header-height) + 1.5rem);
  max-height: calc(100dvh - var(--verid-header-height) - 3rem);
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--verid-color-border) transparent;
  padding-bottom: 2rem;
}

/* ─── Block-Reset ───────────────────────────────────────── */
.region-sidebar-wrapper .block {
  background: none;
  padding: 0;
  border: none;
  box-shadow: none;
  margin: 0;
}

.region-sidebar-wrapper .block + .block {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--verid-color-border);
}

/* Block-Titel */
.region-sidebar-wrapper .block__title {
  display: block;
  font-family: var(--verid-font-body);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--verid-color-text-muted);
  margin: 0 0 1rem 0;
  padding: 0;
  border: none;
}

/* ─── Menü: Bullets entfernen ───────────────────────────── */
/*
 * Maximale Spezifität über den vollen Selektor-Pfad.
 * Kein ::marker auf irgendeiner Ebene.
 */
.region-sidebar-wrapper ul,
.region-sidebar-wrapper ol,
.region-sidebar-wrapper .menu,
.region-sidebar-wrapper ul.menu {
  list-style: none;
  list-style-type: none;
  margin: 0;
  padding: 0;
}

.region-sidebar-wrapper li,
.region-sidebar-wrapper .menu-item {
  list-style: none;
  list-style-type: none;
}

.region-sidebar-wrapper li::marker,
.region-sidebar-wrapper .menu-item::marker {
  content: none;
  display: none;
}

/* ─── Kapitel-Counter ───────────────────────────────────── */
.region-sidebar-wrapper .menu {
  counter-reset: sidebar-chapter;
}

.region-sidebar-wrapper .menu > li,
.region-sidebar-wrapper .menu > .menu-item {
  counter-increment: sidebar-chapter;
  margin-bottom: 2px;
}

/* ─── Kapitel-Links ─────────────────────────────────────── */
.region-sidebar-wrapper .menu > li > a,
.region-sidebar-wrapper .menu > .menu-item > a {
  display: grid;
  grid-template-columns: 26px 1fr;
  align-items: start;
  gap: 0.625rem;
  padding: 0.5rem 0.375rem;
  border-radius: 6px;
  font-family: var(--verid-font-body);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--verid-color-text-secondary);
  text-decoration: none;
  hyphens: none;
  word-break: normal;
  transition: color 150ms, background-color 150ms;
}

/* Nummern-Badge */
.region-sidebar-wrapper .menu > li > a::before,
.region-sidebar-wrapper .menu > .menu-item > a::before {
  content: counter(sidebar-chapter, decimal-leading-zero);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 50%;
  background-color: var(--verid-color-surface-2);
  font-size: 10px;
  font-weight: 700;
  color: var(--verid-color-text-muted);
  margin-top: 1px;
  transition: background-color 150ms, color 150ms;
}

.region-sidebar-wrapper .menu > li > a:hover,
.region-sidebar-wrapper .menu > .menu-item > a:hover {
  color: var(--verid-color-text);
  background-color: var(--verid-color-surface);
}

/* Aktiver Eintrag */
.region-sidebar-wrapper .menu > li.menu-item--active-trail > a,
.region-sidebar-wrapper .menu > .menu-item--active-trail > a,
.region-sidebar-wrapper .menu > li > a.is-active,
.region-sidebar-wrapper .menu > .menu-item > a.is-active {
  color: var(--verid-color-accent);
  font-weight: 500;
  background-color: var(--verid-color-accent-light);
}

.region-sidebar-wrapper .menu > li.menu-item--active-trail > a::before,
.region-sidebar-wrapper .menu > .menu-item--active-trail > a::before,
.region-sidebar-wrapper .menu > li > a.is-active::before,
.region-sidebar-wrapper .menu > .menu-item > a.is-active::before {
  background-color: var(--verid-color-accent);
  color: #fff;
}

/* ─── Sub-Navigation ────────────────────────────────────── */
.region-sidebar-wrapper .menu li ul,
.region-sidebar-wrapper .menu .menu-item .menu {
  counter-reset: none;
  padding: 0.125rem 0 0.25rem calc(26px + 0.625rem + 0.375rem);
  margin: 0;
  list-style: none;
}

.region-sidebar-wrapper .menu li ul li,
.region-sidebar-wrapper .menu .menu-item .menu .menu-item {
  counter-increment: none;
}

.region-sidebar-wrapper .menu li ul li > a,
.region-sidebar-wrapper .menu .menu-item .menu .menu-item > a {
  display: block;
  grid-template-columns: none;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  color: var(--verid-color-text-muted);
  border-radius: 4px;
  text-decoration: none;
  position: relative;
  hyphens: none;
  transition: color 150ms;
}

.region-sidebar-wrapper .menu li ul li > a::before,
.region-sidebar-wrapper .menu .menu-item .menu .menu-item > a::before {
  display: none;
  content: none;
}

.region-sidebar-wrapper .menu li ul li.menu-item--active-trail > a,
.region-sidebar-wrapper .menu .menu-item .menu .menu-item--active-trail > a,
.region-sidebar-wrapper .menu li ul li > a.is-active,
.region-sidebar-wrapper .menu .menu-item .menu .menu-item > a.is-active {
  color: var(--verid-color-accent);
  font-weight: 500;
}

.region-sidebar-wrapper .menu li ul li.menu-item--active-trail > a::after,
.region-sidebar-wrapper .menu .menu-item .menu .menu-item--active-trail > a::after {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 14px;
  background-color: var(--verid-color-accent);
  border-radius: 9999px;
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 1100px) {
  .region-sidebar-wrapper {
    position: static;
    max-height: none;
    overflow: visible;
    border-top: 1px solid var(--verid-color-border);
    padding-top: 2rem;
    margin-top: 2rem;
  }
}