/* ============================================================
   VINTRIX — kennisbank.css
   Overzichtspagina en artikel-pagina's van de Kennisbank
   ============================================================ */

/* ---- Hero ---- */
.kb-hero {
  position: relative;
  background:
    radial-gradient(circle at 20% 10%, rgba(104, 5, 242, 0.55) 0%, transparent 50%),
    radial-gradient(circle at 85% 85%, rgba(68, 225, 242, 0.18) 0%, transparent 55%),
    linear-gradient(145deg, var(--color-indigo) 0%, #1A0460 55%, #2A0580 100%);
  color: var(--color-white);
  padding-block: clamp(4.5rem, 10vw, 7.5rem);
  overflow: hidden;
}

.kb-hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.kb-hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  color: var(--color-white);
  margin-block: 1rem 1.25rem;
  line-height: 1.1;
}

.kb-hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255, 255, 255, 0.78);
  max-width: 56ch;
  margin: 0;
}

.kb-hero .hero-label {
  color: var(--color-cyan);
}

/* ---- Categorie-filter (sticky) ---- */
.kb-filter {
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--color-border);
  padding: 0.85rem 0;
  position: sticky;
  top: var(--nav-height);
  z-index: 50;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.kb-filter-label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-purple);
  margin: 0 0 0.55rem 0;
}

.kb-filter-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.kb-filter-btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-indigo);
  background: rgba(104, 5, 242, 0.06);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.85rem;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

.kb-filter-btn:hover,
.kb-filter-btn:focus-visible {
  background: var(--color-purple);
  color: var(--color-white);
  border-color: var(--color-purple);
  transform: translateY(-1px);
}

.kb-filter-btn[aria-pressed="true"] {
  background: var(--color-indigo);
  color: var(--color-white);
  border-color: var(--color-indigo);
}

/* ---- Artikelen-sectie ---- */
.kb-articles {
  padding-block: clamp(3rem, 6vw, 5rem);
}

.kb-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
  font-family: var(--font-heading);
  font-size: 1rem;
}

/* ---- Featured (grote) kaart ---- */
.kb-featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 2.5rem;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-card);
}

.kb-featured:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.kb-featured-visual {
  background: linear-gradient(135deg, var(--color-indigo) 0%, var(--color-purple) 100%);
  padding: 2.5rem 2rem;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
  min-height: 180px;
  display: flex;
  align-items: flex-end;
}

.kb-featured-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(68, 225, 242, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(68, 225, 242, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.kb-featured-badge {
  position: relative;
  z-index: 1;
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-lime);
  background: rgba(17, 2, 115, 0.6);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
}

.kb-featured-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.kb-featured h2 {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  color: var(--color-indigo);
  line-height: 1.2;
}

.kb-featured h2 a {
  color: inherit;
  transition: color var(--transition);
}

.kb-featured h2 a:hover {
  color: var(--color-purple);
}

.kb-featured-excerpt {
  color: var(--color-text-muted);
  margin: 0;
}

@media (min-width: 720px) {
  .kb-featured {
    grid-template-columns: 1fr 1.2fr;
  }
  .kb-featured-visual {
    min-height: auto;
  }
}

/* ---- Artikel-grid ---- */
.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.kb-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  box-shadow: var(--shadow-card);
}

.kb-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(104, 5, 242, 0.25);
}

.kb-card-top {
  background: linear-gradient(135deg, var(--color-indigo) 0%, var(--color-purple) 100%);
  padding: 1.25rem 1.25rem 0.85rem;
  position: relative;
  overflow: hidden;
}

.kb-card-top::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(68, 225, 242, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(68, 225, 242, 0.1) 1px, transparent 1px);
  background-size: 16px 16px;
  pointer-events: none;
}

.kb-card-category {
  position: relative;
  z-index: 1;
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-cyan);
}

.kb-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.kb-card-title {
  font-size: 1.1rem;
  line-height: 1.3;
  color: var(--color-indigo);
  margin: 0;
}

.kb-card-title a {
  color: inherit;
  transition: color var(--transition);
}

.kb-card-title a:hover {
  color: var(--color-purple);
}

.kb-card-excerpt {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
}

.kb-card-meta {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--color-border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

.kb-card-meta strong {
  color: var(--color-indigo);
  font-weight: 600;
}

/* ---- CTA blok ---- */
.kb-cta {
  background:
    radial-gradient(circle at 80% 20%, rgba(68, 225, 242, 0.18) 0%, transparent 55%),
    linear-gradient(145deg, var(--color-indigo) 0%, #1A0460 60%, #2A0580 100%);
  color: var(--color-white);
  padding-block: clamp(3rem, 6vw, 4.5rem);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.kb-cta h2 {
  color: var(--color-white);
  margin-bottom: 1rem;
}

.kb-cta p {
  color: rgba(255, 255, 255, 0.78);
  max-width: 50ch;
  margin: 0 auto 1.75rem;
}

/* ============================================================
   Artikel-pagina
   ============================================================ */

.kb-article {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.kb-article-wrap {
  max-width: 760px;
  margin-inline: auto;
}

/* ---- Breadcrumb ---- */
.kb-breadcrumb {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.kb-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0;
  margin: 0;
}

.kb-breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.kb-breadcrumb li + li::before {
  content: '›';
  color: var(--color-border);
}

.kb-breadcrumb a {
  color: var(--color-purple);
  transition: color var(--transition);
}

.kb-breadcrumb a:hover {
  color: var(--color-indigo);
}

.kb-breadcrumb [aria-current="page"] {
  color: var(--color-text);
}

/* ---- Artikel header ---- */
.kb-article-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1.75rem;
}

.kb-article-category {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-purple);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.kb-article-title {
  font-size: clamp(1.8rem, 4.5vw, 2.75rem);
  line-height: 1.15;
  color: var(--color-indigo);
  margin-bottom: 1.25rem;
}

.kb-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  align-items: center;
}

.kb-article-author {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-indigo);
  font-weight: 600;
}

.kb-article-author-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--color-cyan);
  border-radius: 50%;
}

/* ---- TL;DR blok (citatievriendelijk) ---- */
.kb-article-tldr {
  background: linear-gradient(135deg, rgba(104, 5, 242, 0.05) 0%, rgba(68, 225, 242, 0.08) 100%);
  border-left: 4px solid var(--color-purple);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
}

.kb-article-tldr-label {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-purple);
  margin: 0 0 0.5rem 0;
  max-width: none;
}

.kb-article-tldr p {
  color: var(--color-indigo);
  font-size: 1rem;
  font-weight: 500;
  margin: 0;
  max-width: none;
}

/* ---- Artikel-body typografie ---- */
.kb-article-body {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-text);
}

.kb-article-body > * + * {
  margin-top: 1.1rem;
}

.kb-article-body h2 {
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  margin-top: 2.5rem;
  margin-bottom: 0.25rem;
  color: var(--color-indigo);
}

.kb-article-body h3 {
  font-size: 1.2rem;
  margin-top: 1.75rem;
  color: var(--color-indigo);
}

.kb-article-body p {
  color: var(--color-text);
  max-width: none;
}

.kb-article-body ul,
.kb-article-body ol {
  padding-left: 1.3rem;
}

.kb-article-body ul {
  list-style: disc;
}

.kb-article-body ol {
  list-style: decimal;
}

.kb-article-body li + li {
  margin-top: 0.5rem;
}

.kb-article-body strong {
  color: var(--color-indigo);
  font-weight: 600;
}

.kb-article-body blockquote {
  border-left: 4px solid var(--color-cyan);
  background: var(--color-bg-alt);
  padding: 1rem 1.25rem;
  font-style: italic;
  color: var(--color-indigo);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.kb-article-body a {
  color: var(--color-purple);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

.kb-article-body a:hover {
  color: var(--color-indigo);
}

/* ---- Artikel FAQ (binnen het artikel) ---- */
.kb-article-faq {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
}

.kb-article-faq h2 {
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  margin-bottom: 1.25rem;
  color: var(--color-indigo);
}

.kb-article-faq details {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0;
  margin-bottom: 0.65rem;
  transition: border-color var(--transition);
}

.kb-article-faq details[open] {
  border-color: var(--color-purple);
}

.kb-article-faq summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-indigo);
  list-style: none;
  position: relative;
  padding-right: 2.5rem;
}

.kb-article-faq summary::-webkit-details-marker {
  display: none;
}

.kb-article-faq summary::after {
  content: '+';
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-purple);
  font-size: 1.2rem;
  transition: transform var(--transition);
}

.kb-article-faq details[open] summary::after {
  content: '−';
}

.kb-article-faq details > :not(summary) {
  padding: 0 1.25rem 1rem;
  color: var(--color-text);
  font-size: 0.98rem;
}

/* ---- Artikel-footer: auteur, gerelateerde artikelen, CTA ---- */
.kb-article-footer {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
}

.kb-author-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}

.kb-author-avatar {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-cyan) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-white);
  font-size: 1rem;
}

.kb-author-info {
  flex: 1;
}

.kb-author-name {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-indigo);
  margin: 0 0 0.15rem;
  font-size: 1rem;
}

.kb-author-role {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

.kb-related h2 {
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
  color: var(--color-indigo);
}

.kb-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.kb-article-cta {
  background:
    radial-gradient(circle at 80% 20%, rgba(68, 225, 242, 0.18) 0%, transparent 55%),
    linear-gradient(145deg, var(--color-indigo) 0%, #2A0580 100%);
  color: var(--color-white);
  padding: 2rem 2rem;
  border-radius: var(--radius-md);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.kb-article-cta h3 {
  color: var(--color-white);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.kb-article-cta p {
  color: rgba(255, 255, 255, 0.78);
  margin: 0 auto 1.25rem;
  max-width: 46ch;
}

/* ---- Gerelateerde artikel-kaart ---- */
.kb-related-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.1rem 1.25rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.kb-related-card:hover {
  border-color: var(--color-purple);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(104, 5, 242, 0.12);
}

.kb-related-category {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-purple);
}

.kb-related-title {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-indigo);
  line-height: 1.3;
}

/* ---- Bronvermelding onder een artikel ---- */
.kb-article-source {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ==== Kennisbank-beelden ==== */

/* Kaart-thumbnail */
.kb-card-top--img {
  padding: 0;
  aspect-ratio: 16 / 10;
  display: block;
}
.kb-card-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.kb-card-top--img::before { display: none; }
.kb-card-top--img::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(17, 2, 115, 0.5) 0%, rgba(17, 2, 115, 0) 52%);
}
.kb-card-top--img .kb-card-category {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2;
  color: var(--color-white);
  background: rgba(17, 2, 115, 0.62);
  padding: 0.28rem 0.6rem;
  border-radius: var(--radius-sm);
}

/* Featured-kaart met foto */
.kb-featured-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.kb-featured-visual--img::before { display: none; }
.kb-featured-visual--img::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, rgba(17, 2, 115, 0.25) 0%, rgba(17, 2, 115, 0.72) 100%);
}
.kb-featured-visual--img .kb-featured-badge { z-index: 1; }

/* Artikel banner-hero: foto achter de titel, tekst blijft leidend */
.kb-article-banner {
  position: relative;
  isolation: isolate;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2rem;
  padding: clamp(1.75rem, 5vw, 3rem);
  min-height: 240px;
  display: flex;
  align-items: flex-end;
  background: var(--color-indigo);
}
.kb-banner-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}
.kb-article-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(17, 2, 115, 0.25) 0%, rgba(17, 2, 115, 0.78) 72%, rgba(17, 2, 115, 0.94) 100%),
    linear-gradient(90deg, rgba(104, 5, 242, 0.35) 0%, rgba(17, 2, 115, 0) 60%);
}
.kb-banner-inner {
  position: relative;
  z-index: 1;
  max-width: 62ch;
}
.kb-article-banner .kb-article-title { color: var(--color-white); margin-bottom: 1rem; }
.kb-article-banner .kb-article-meta { color: rgba(255, 255, 255, 0.85); }
.kb-article-banner .kb-article-author { color: var(--color-white); }

/* ==== Deel-knoppen ==== */
.kb-share {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin: 2.5rem 0;
  padding: 1.1rem 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.kb-share-label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-indigo);
}
.kb-share-btns {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
}
.kb-share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-indigo);
  cursor: pointer;
  position: relative;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}
.kb-share-btn svg { width: 20px; height: 20px; }
.kb-share-btn:hover { transform: translateY(-2px); color: var(--color-white); }
.kb-share-btn--li:hover { background: #0a66c2; border-color: #0a66c2; }
.kb-share-btn--wa:hover { background: #25d366; border-color: #25d366; }
.kb-share-btn--mail:hover { background: var(--color-purple); border-color: var(--color-purple); }
.kb-share-btn--copy:hover { background: var(--color-indigo); border-color: var(--color-indigo); }
.kb-share-copied {
  position: absolute;
  top: -1.9rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-indigo);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.kb-share-btn--copy.copied .kb-share-copied { opacity: 1; }
@media (max-width: 480px) {
  .kb-share-btns { margin-left: 0; }
}

/* ---- Hidden utility ---- */
.kb-hidden {
  display: none !important;
}