/* ============================================================
   KNOWLEDGE  (Wissen hub + article pages)
   ------------------------------------------------------------
   Loaded on /knowledge/index.html (hub) and the article pages.
   Reuses base.css tokens + shared blocks (.hero, .section,
   .cta-banner, .js-fade). Everything below uses var(--clr-…)
   so light/dark mode is handled automatically.
============================================================ */

/* ============================================================
   HUB  -  intro + article grid
============================================================ */
.knw-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
}

.knw-card {
  display: flex; flex-direction: column; gap: .6rem;
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.6rem;
  transition: transform .3s, box-shadow .3s, border-color .3s;
  position: relative; overflow: hidden;
  color: inherit; text-decoration: none;
}
.knw-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-primary-light);
}
.knw-card__icon {
  width: 48px; height: 48px;
  background: var(--clr-primary-tint);
  border: 1px solid var(--clr-primary-light);
  border-radius: 13px;
  display: flex; align-items: center; justify-content: center;
}
.knw-card__icon img { width: 22px; height: 22px; object-fit: contain; }
.knw-card__meta {
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
  font-size: .7rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--clr-primary);
}
.knw-card__read { color: var(--clr-muted); letter-spacing: .04em; }
.knw-card h3 {
  font-family: "Sora", sans-serif; font-size: 1.1rem; font-weight: 700;
  color: var(--clr-text); margin: 0; line-height: 1.3;
}
.knw-card p {
  font-size: .87rem; color: var(--clr-muted); line-height: 1.6; margin: 0;
}
.knw-card__cta {
  margin-top: auto; padding-top: .4rem;
  display: inline-flex; align-items: center; gap: .4rem;
  font-family: "Sora", sans-serif; font-size: .82rem; font-weight: 700;
  color: var(--clr-primary); transition: gap .2s;
}
.knw-card:hover .knw-card__cta { gap: .7rem; }

/* ============================================================
   ARTICLE HEADER  (breadcrumb + category + title + lead + meta)
============================================================ */
.article-head {
  background:
    radial-gradient(130% 130% at 100% 0, var(--clr-primary-light) 0, transparent 58%),
    linear-gradient(180deg, var(--clr-primary-tint) 0%, transparent 70%),
    var(--clr-card);
  border-bottom: 1px solid var(--clr-border);
  padding: 2.5rem 2rem 2.75rem;
}
.article-head__inner { max-width: 1100px; margin: 0 auto; }

.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: .45rem;
  font-size: .8rem; color: var(--clr-muted); margin-bottom: 1.25rem;
}
.breadcrumb a { color: var(--clr-muted); transition: color .2s; }
.breadcrumb a:hover { color: var(--clr-primary); }
.breadcrumb__sep { opacity: .5; }
.breadcrumb__current { color: var(--clr-text); font-weight: 600; }

.article-cat {
  display: inline-block;
  font-size: .7rem; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--clr-primary);
  background: var(--clr-primary-tint);
  border: 1px solid var(--clr-primary-light);
  padding: .25rem .75rem; border-radius: 100px;
  margin-bottom: 1rem;
}
.article-head h1 {
  font-family: "Sora", sans-serif;
  font-size: clamp(1.7rem, 3.6vw, 2.6rem); font-weight: 800;
  line-height: 1.18; color: var(--clr-text);
  max-width: 760px; margin-bottom: .9rem;
}
.article-lead {
  font-size: 1.05rem; color: var(--clr-muted);
  line-height: 1.65; max-width: 680px; margin-bottom: 1.5rem;
}
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: .55rem;
  font-size: .82rem; color: var(--clr-muted);
}
.article-meta__author { color: var(--clr-text); font-weight: 600; }
.article-meta__dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: .5; }

/* ============================================================
   ARTICLE LAYOUT  (body + sticky table of contents)
============================================================ */
.article-wrap { max-width: 1100px; margin: 0 auto; padding: 2.5rem 2rem 3rem; }
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 3rem; align-items: start;
}

/* sticky TOC ---------------------------------------------- */
.article-toc {
  position: sticky; top: 84px;
  align-self: start;
}
.article-toc__label {
  font-size: .72rem; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--clr-muted);
  margin-bottom: .85rem;
}
.article-toc ol { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--clr-border); }
.article-toc li { margin: 0; }
.article-toc a {
  display: block; padding: .4rem 0 .4rem 1rem; margin-left: -2px;
  border-left: 2px solid transparent;
  font-size: .85rem; line-height: 1.4; color: var(--clr-muted);
  transition: color .2s, border-color .2s;
}
.article-toc a:hover { color: var(--clr-primary); }
.article-toc a.is-active {
  color: var(--clr-primary-dark); font-weight: 700;
  border-left-color: var(--clr-primary);
}

/* ============================================================
   ARTICLE BODY TYPOGRAPHY
============================================================ */
.article-body { font-size: 1rem; line-height: 1.8; color: var(--clr-text); min-width: 0; }
.article-body > * { scroll-margin-top: 84px; }   /* keep anchors clear of sticky nav */

.article-body h2 {
  font-family: "Sora", sans-serif; font-size: 1.5rem; font-weight: 700;
  color: var(--clr-text); line-height: 1.25;
  margin: 2.75rem 0 .9rem;
}
.article-body h2:first-child { margin-top: 0; }
.article-body h3 {
  font-family: "Sora", sans-serif; font-size: 1.15rem; font-weight: 700;
  color: var(--clr-text); margin: 1.9rem 0 .6rem;
}
.article-body p { margin: 0 0 1.15rem; color: var(--clr-text); }
.article-body a { color: var(--clr-primary); font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--clr-primary-dark); }
.article-body strong { color: var(--clr-text); font-weight: 700; }

.article-body ul, .article-body ol { margin: 0 0 1.25rem; padding-left: 1.4rem; }
.article-body li { margin-bottom: .5rem; }
.article-body ul li::marker { color: var(--clr-primary); }
.article-body ol li::marker { color: var(--clr-primary); font-weight: 700; }

.article-body blockquote {
  margin: 1.5rem 0; padding: .6rem 0 .6rem 1.4rem;
  border-left: 4px solid var(--clr-primary-light);
  color: var(--clr-muted); font-style: italic; font-size: 1.05rem;
}
.article-body hr { border: none; border-top: 1px solid var(--clr-border); margin: 2.5rem 0; }

/* ============================================================
   CALLOUTS  (key takeaway / tip / warning)
============================================================ */
.callout {
  display: flex; gap: .9rem;
  border: 1px solid var(--clr-border);
  border-left: 4px solid var(--clr-primary);
  border-radius: var(--radius-sm);
  background: var(--clr-primary-tint);
  padding: 1.1rem 1.25rem;
  margin: 1.75rem 0;
}
.callout__icon {
  flex-shrink: 0; width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
}
.callout__icon img { width: 20px; height: 20px; object-fit: contain; }
.callout__body { min-width: 0; }
.callout__title {
  font-family: "Sora", sans-serif; font-weight: 700; font-size: .95rem;
  color: var(--clr-text); margin-bottom: .35rem;
}
.callout__body p:last-child,
.callout__body ul:last-child { margin-bottom: 0; }
.callout__body ul { padding-left: 1.2rem; }

.callout--warn {
  border-left-color: var(--clr-accent);
  background: var(--clr-accent-light);
}

/* ============================================================
   COMPARISON TABLE  (investor type → recommended depot, …)
============================================================ */
.article-table {
  overflow-x: auto; margin: 1.75rem 0;
  border: 1px solid var(--clr-border); border-radius: var(--radius-sm);
}
.article-table table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.article-table th, .article-table td {
  padding: .8rem 1rem; text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--clr-border);
}
.article-table thead th {
  font-family: "Sora", sans-serif; font-weight: 700; font-size: .82rem;
  color: var(--clr-text); background: var(--clr-row-alt);
  white-space: nowrap;
}
.article-table tbody tr:last-child td { border-bottom: none; }
.article-table tbody tr:hover { background: var(--clr-row-alt); }
.article-table td:first-child { font-weight: 700; color: var(--clr-text); white-space: nowrap; }

/* ============================================================
   PROS / CONS
============================================================ */
.proscons { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin: 1.75rem 0; }
.proscons__col {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1.35rem;
}
.proscons__head {
  display: flex; align-items: center; gap: .5rem;
  font-family: "Sora", sans-serif; font-weight: 700; font-size: .95rem;
  margin-bottom: .75rem;
}
.proscons__col--pro .proscons__head { color: var(--clr-primary-dark); }
.proscons__col--con .proscons__head { color: var(--clr-accent); }
.proscons__col ul { list-style: none; margin: 0; padding: 0; }
.proscons__col li {
  position: relative; padding-left: 1.5rem; margin-bottom: .55rem;
  font-size: .88rem; line-height: 1.55; color: var(--clr-text);
}
.proscons__col li:last-child { margin-bottom: 0; }
.proscons__col li::before {
  position: absolute; left: 0; top: -1px; font-weight: 800;
}
.proscons__col--pro li::before { content: "✓"; color: var(--clr-primary); }
.proscons__col--con li::before { content: "✕"; color: var(--clr-accent); }

/* ============================================================
   ARTICLE FOOTER  (author card + back link)
============================================================ */
.article-authorbox {
  display: flex; gap: 1rem; align-items: center;
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem; margin-top: 2.5rem;
}
.article-authorbox__avatar {
  width: 48px; height: 48px; flex-shrink: 0; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: "Sora", sans-serif; font-weight: 700; color: white;
  background: linear-gradient(140deg, var(--clr-primary), var(--clr-primary-deep));
}
.article-authorbox__name { font-family: "Sora", sans-serif; font-weight: 700; color: var(--clr-text); }
.article-authorbox__role { font-size: .82rem; color: var(--clr-muted); }

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; gap: 1.5rem; }
  .article-toc {
    position: static; order: -1;
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.1rem;
  }
  .article-toc ol { border-left: none; }
  .article-toc a { padding-left: 0; border-left: none; }
  .article-toc a.is-active { border-left: none; }
}
@media (max-width: 600px) {
  .article-head { padding: 2rem 1.25rem 2.25rem; }
  .article-wrap { padding: 2rem 1.25rem 2.5rem; }
  .proscons { grid-template-columns: 1fr; }
}