:root {
  --topic-ink: #10271d;
  --topic-muted: #607269;
  --topic-green: #087e59;
  --topic-green-dark: #056244;
  --topic-mint: #eaf7f1;
  --topic-line: #d9e4de;
  --topic-warm: #f7f4ed;
  --topic-paper: #fffefa;
}

.topic-page {
  background: #fbfaf6;
  color: var(--topic-ink);
}

.topic-page main {
  overflow: hidden;
}

.topic-breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 28px;
  color: var(--topic-muted);
  font-size: .82rem;
}

.topic-breadcrumb a {
  color: var(--topic-green-dark);
  font-weight: 700;
}

.topic-breadcrumb span[aria-hidden] {
  color: #a0aca6;
}

.topic-hero {
  padding: 78px 0 82px;
  border-bottom: 1px solid var(--topic-line);
  background: #f5faf7;
}

.topic-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(290px, .65fr);
  align-items: end;
  gap: clamp(42px, 7vw, 110px);
}

.topic-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
  color: var(--topic-green-dark);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.topic-kicker::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--topic-green);
  content: "";
}

.topic-hero h1,
.topic-index-hero h1 {
  max-width: 900px;
  margin: 0 0 24px;
  font-size: clamp(2.55rem, 5vw, 4.8rem);
  line-height: .98;
  letter-spacing: 0;
}

.topic-hero h1 em,
.topic-index-hero h1 em {
  color: var(--topic-green);
  font-family: inherit;
  font-style: normal;
}

.topic-lead {
  max-width: 780px;
  margin: 0;
  color: #50645a;
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.7;
}

.topic-updated {
  display: block;
  margin-top: 24px;
  color: #75847c;
  font-size: .75rem;
}

.topic-hero-card {
  padding: 28px;
  border: 1px solid #cde0d5;
  border-radius: 16px;
  background: rgba(255, 255, 252, .88);
  box-shadow: 0 18px 45px rgba(16, 39, 29, .07);
}

.topic-hero-card > span {
  color: var(--topic-green-dark);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.topic-hero-card h2 {
  margin: 9px 0 17px;
  font-size: 1.25rem;
  line-height: 1.25;
}

.topic-checklist {
  display: grid;
  gap: 12px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.topic-checklist li {
  position: relative;
  padding-left: 24px;
  color: #40564b;
  font-size: .9rem;
  line-height: 1.5;
}

.topic-checklist li::before {
  position: absolute;
  top: .5em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #25a978;
  content: "";
}

.topic-hero-card .button {
  width: 100%;
  justify-content: center;
}

.topic-section {
  padding: 88px 0;
}

.topic-section.alt {
  border-top: 1px solid var(--topic-line);
  border-bottom: 1px solid var(--topic-line);
  background: var(--topic-warm);
}

.topic-section-head {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: clamp(40px, 8vw, 120px);
  margin-bottom: 46px;
}

.topic-section-head h2,
.topic-prose h2,
.topic-related h2,
.topic-index-section h2 {
  margin: 0;
  font-size: clamp(2rem, 3.6vw, 3.35rem);
  line-height: 1.05;
}

.topic-section-head p {
  margin: 5px 0 0;
  color: var(--topic-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.topic-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--topic-line);
}

.topic-card {
  min-height: 245px;
  padding: 30px 30px 34px 0;
  border-bottom: 1px solid var(--topic-line);
}

.topic-card:not(:nth-child(3n + 1)) {
  padding-left: 30px;
  border-left: 1px solid var(--topic-line);
}

.topic-card .topic-number {
  display: block;
  margin-bottom: 42px;
  color: var(--topic-green);
  font-family: "Spline Sans Mono", monospace;
  font-size: .7rem;
}

.topic-card h3 {
  margin: 0 0 12px;
  font-size: 1.12rem;
  line-height: 1.3;
}

.topic-card p {
  margin: 0;
  color: var(--topic-muted);
  font-size: .9rem;
  line-height: 1.65;
}

.topic-content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: start;
  gap: clamp(48px, 8vw, 120px);
}

.topic-prose {
  min-width: 0;
}

.topic-prose h2 {
  margin-bottom: 25px;
}

.topic-prose h3 {
  margin: 38px 0 12px;
  font-size: 1.25rem;
}

.topic-prose p,
.topic-prose li {
  color: #4f6258;
  font-size: 1rem;
  line-height: 1.8;
}

.topic-prose p {
  margin: 0 0 22px;
}

.topic-prose ul,
.topic-prose ol {
  display: grid;
  gap: 10px;
  margin: 18px 0 28px;
  padding-left: 23px;
}

.topic-note {
  margin: 34px 0;
  padding: 23px 25px;
  border-left: 3px solid var(--topic-green);
  background: var(--topic-mint);
}

.topic-note strong {
  display: block;
  margin-bottom: 6px;
  color: var(--topic-ink);
}

.topic-note p {
  margin: 0;
  font-size: .92rem;
}

.topic-aside {
  position: sticky;
  top: 150px;
  display: grid;
  gap: 18px;
}

.topic-aside-card {
  padding: 25px;
  border: 1px solid var(--topic-line);
  border-radius: 14px;
  background: var(--topic-paper);
}

.topic-aside-card h2,
.topic-aside-card h3 {
  margin: 0 0 13px;
  font-size: 1.05rem;
}

.topic-aside-card p {
  margin: 0 0 16px;
  color: var(--topic-muted);
  font-size: .84rem;
  line-height: 1.65;
}

.topic-aside-links,
.topic-source-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.topic-aside-links a,
.topic-source-list a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--topic-line);
  color: var(--topic-green-dark);
  font-size: .84rem;
  font-weight: 700;
  line-height: 1.4;
}

.topic-aside-links a::after,
.topic-source-list a::after {
  flex: 0 0 auto;
  content: "\2192";
}

.topic-question-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
}

.topic-question {
  padding: 24px;
  border: 1px solid var(--topic-line);
  border-radius: 13px;
  background: var(--topic-paper);
  color: var(--topic-ink);
  font-size: .94rem;
  font-weight: 700;
  line-height: 1.55;
}

.topic-related {
  padding: 82px 0;
  background: #eef7f2;
}

.topic-related h2 {
  margin-bottom: 34px;
}

.topic-related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.topic-related-link {
  display: flex;
  min-height: 150px;
  padding: 23px;
  border: 1px solid #cee0d6;
  border-radius: 14px;
  background: rgba(255, 255, 252, .85);
  flex-direction: column;
  justify-content: space-between;
  color: var(--topic-ink);
  transition: transform .18s ease, border-color .18s ease;
}

.topic-related-link:hover {
  border-color: #80bca2;
  transform: translateY(-2px);
}

.topic-related-link strong {
  font-size: 1rem;
}

.topic-related-link span {
  color: var(--topic-green);
  font-size: .8rem;
  font-weight: 800;
}

.topic-cta {
  padding: 82px 0;
  background: var(--topic-ink);
  color: #fff;
}

.topic-cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(290px, .8fr);
  align-items: center;
  gap: 60px;
}

.topic-cta h2 {
  margin: 0;
  color: #fff;
  font-size: clamp(2.1rem, 4vw, 3.8rem);
  line-height: 1.02;
}

.topic-cta p {
  margin: 0 0 22px;
  color: rgba(255, 255, 255, .72);
  line-height: 1.7;
}

.topic-cta .button {
  background: #fff;
  color: var(--topic-ink);
}

.topic-disclaimer {
  margin-top: 22px;
  color: #77867e;
  font-size: .73rem;
  line-height: 1.6;
}

/* Onderwerpenhub */
.topic-index-hero {
  padding: 82px 0 70px;
  border-bottom: 1px solid var(--topic-line);
  background: #f5faf7;
}

.topic-index-hero .topic-lead {
  max-width: 850px;
}

.topic-error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.topic-error-actions .button {
  min-width: 190px;
  justify-content: center;
}

.topic-index-section {
  padding: 80px 0 95px;
}

.topic-index-section h2 {
  max-width: 760px;
  margin-bottom: 40px;
}

.topic-index-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.topic-index-card {
  display: flex;
  min-height: 255px;
  padding: 27px;
  border: 1px solid var(--topic-line);
  border-radius: 15px;
  background: var(--topic-paper);
  flex-direction: column;
  color: var(--topic-ink);
  transition: transform .18s ease, border-color .18s ease;
}

.topic-index-card:hover {
  border-color: #76b89b;
  transform: translateY(-3px);
}

.topic-index-card > span:first-child {
  margin-bottom: 44px;
  color: var(--topic-green);
  font-family: "Spline Sans Mono", monospace;
  font-size: .7rem;
}

.topic-index-card h2,
.topic-index-card h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  line-height: 1.25;
}

.topic-index-card p {
  margin: 0 0 24px;
  color: var(--topic-muted);
  font-size: .87rem;
  line-height: 1.62;
}

.topic-index-card .topic-card-link {
  margin-top: auto;
  color: var(--topic-green-dark);
  font-size: .82rem;
  font-weight: 800;
}

@media (max-width: 980px) {
  .topic-hero-grid,
  .topic-section-head,
  .topic-content-grid,
  .topic-cta-inner {
    grid-template-columns: 1fr;
  }

  .topic-hero-card {
    max-width: 620px;
  }

  .topic-aside {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-card-grid,
  .topic-index-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-card:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .topic-card:nth-child(even) {
    padding-left: 30px;
    border-left: 1px solid var(--topic-line);
  }
}

@media (max-width: 680px) {
  .topic-hero,
  .topic-index-hero {
    padding: 48px 0 56px;
  }

  .topic-hero h1,
  .topic-index-hero h1 {
    font-size: clamp(2.3rem, 12vw, 3.35rem);
    line-height: 1.02;
  }

  .topic-section,
  .topic-related,
  .topic-cta,
  .topic-index-section {
    padding: 60px 0;
  }

  .topic-card-grid,
  .topic-question-list,
  .topic-related-grid,
  .topic-index-grid,
  .topic-aside {
    grid-template-columns: 1fr;
  }

  .topic-card,
  .topic-card:not(:nth-child(3n + 1)),
  .topic-card:nth-child(even) {
    min-height: 0;
    padding: 24px 0;
    border-left: 0;
  }

  .topic-card .topic-number,
  .topic-index-card > span:first-child {
    margin-bottom: 24px;
  }

  .topic-content-grid {
    gap: 48px;
  }

  .topic-hero-card,
  .topic-index-card,
  .topic-question,
  .topic-aside-card {
    border-radius: 12px;
  }
}