/* BW Lernplattform - Lernbereich */

.learn-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: calc(100vh - var(--nav-height));
  gap: 0;
}

/* ================================================
   SIDEBAR
   ================================================ */
.learn-sidebar {
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  position: sticky;
  top: var(--nav-height);
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sidebar-search {
  width: 100%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9rem;
}

.sidebar-search:focus {
  outline: none;
  border-color: var(--color-accent);
}

.sidebar-search::placeholder {
  color: var(--color-text-dim);
}

/* Themen-Navigation */
.sidebar-topics {
  flex: 1;
  overflow-y: auto;
}

.sidebar-topic {
  border-bottom: 1px solid var(--color-border);
}

.sidebar-topic__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
}

.sidebar-topic__header:hover {
  background: var(--color-surface-2);
}

.sidebar-topic__header.is-active {
  background: rgba(201, 168, 76, 0.05);
}

.sidebar-topic__name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text);
  flex: 1;
}

.sidebar-topic__chevron {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  transition: transform var(--transition);
}

.sidebar-topic__header.is-open .sidebar-topic__chevron {
  transform: rotate(180deg);
}

.sidebar-topic__articles {
  display: none;
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-border);
}

.sidebar-topic__articles.is-open {
  display: block;
}

.sidebar-article {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.sidebar-article:hover {
  background: var(--color-surface-3);
  color: var(--color-text);
}

.sidebar-article.is-active {
  background: rgba(201, 168, 76, 0.1);
  color: var(--color-accent);
  border-left: 2px solid var(--color-accent);
}

.sidebar-article.is-read .article-dot {
  background: var(--color-success);
}

.article-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-border);
  flex-shrink: 0;
  transition: background var(--transition);
}

.sidebar-article__number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  min-width: 55px;
}

/* ================================================
   ARTIKEL-CONTENT
   ================================================ */
.learn-content {
  padding: var(--space-xl);
  max-width: 780px;
}

.article-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.article-breadcrumb a {
  color: var(--color-text-muted);
}

.article-breadcrumb a:hover {
  color: var(--color-accent);
}

.article-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-xs);
}

.article-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.article-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  align-items: center;
}

/* Gesetzestext */
.article-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--space-xl);
}

.article-body p {
  margin-bottom: var(--space-md);
}

.article-body strong {
  color: var(--color-accent-light);
}

/* Schlüsselpunkte */
.key-points {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.key-points__title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.key-points__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.key-points__item {
  display: flex;
  gap: var(--space-sm);
  font-size: 0.95rem;
  line-height: 1.5;
}

.key-points__item::before {
  content: "\25BA";
  color: var(--color-accent);
  font-size: 0.6rem;
  flex-shrink: 0;
  margin-top: 5px;
}

/* Quellen-Link */
.source-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition);
}

.source-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Navigation zwischen Artikeln */
.article-nav {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  gap: var(--space-md);
}

.article-nav__btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  background: none;
  transition: all var(--transition);
  flex: 1;
  max-width: 200px;
}

.article-nav__btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.article-nav__btn--next {
  margin-left: auto;
}

/* Placeholder (kein Artikel) */
.learn-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: var(--space-2xl);
}

.learn-placeholder__icon {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
  opacity: 0.4;
}

.learn-placeholder__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

/* Mobile Sidebar Toggle */
.sidebar-toggle {
  display: none;
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  background: var(--color-accent);
  color: #0f1114;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

/* ================================================
   HIGHLIGHT für Suchergebnisse
   ================================================ */
mark {
  background: rgba(201, 168, 76, 0.3);
  color: var(--color-text);
  border-radius: 2px;
  padding: 0 2px;
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 768px) {
  .learn-layout {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .learn-sidebar {
    position: fixed;
    top: var(--nav-height);
    left: -100%;
    width: 85%;
    max-width: 320px;
    height: calc(100vh - var(--nav-height));
    z-index: 200;
    transition: left var(--transition-slow);
    box-shadow: var(--shadow-xl);
  }

  .learn-sidebar.is-open {
    left: 0;
  }

  .sidebar-toggle {
    display: flex;
  }

  .learn-content {
    padding: var(--space-md);
    min-height: 50vh;
  }

  .article-title {
    font-size: 1.35rem;
  }
}