.erklaerungen {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
  line-height: 1.6;
  color: #222;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  margin-bottom: 1rem;
}

.intro {
  font-size: 1.15rem;
  font-weight: 500;
}

.toc {
  margin: 2rem 0;
  padding: 1.25rem;
  background: #f1f5f2;
  border-left: 4px solid #3d7a4d;
  border-radius: 4px;
}

.toc ul {
  margin-bottom: 0;
}

.erklaerungen section {
  margin: 3rem 0;
}

.erklaerungen h2 {
  margin-top: 0;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid #d9e3da;
}

.erklaerungen h3 {
  margin-top: 2rem;
}

.erklaerungen li {
  margin-bottom: 0.4rem;
}

.hint {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: #fff8df;
  border-left: 4px solid #d8a62b;
}

.calculation {
  padding: 0.75rem 1rem;
  background: #f4f4f4;
  border-radius: 4px;
  font-family: monospace;
  font-size: 1.05rem;
}

.example {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: #f7f9f7;
  border-radius: 5px;
}

details {
  margin: 0.75rem 0;
  padding: 0.9rem 1rem;
  background: #f7f7f7;
  border: 1px solid #ddd;
  border-radius: 4px;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

details p {
  margin-bottom: 0;
  padding-top: 0.75rem;
}

.conclusion {
  padding: 1.5rem;
  background: #edf6ef;
  border-radius: 5px;
}