.document-container {
  max-width: 1000px;
  margin: 40px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 40px;
  align-items: flex-start;
}

.document-nav {
  position: sticky;
  top: 90px; /* Отступ от шапки + небольшой зазор */
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 20px;
}
.document-nav h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 16px 0;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.document-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.document-nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: #aaaaaa;
  transition: background-color 0.2s, color 0.2s;
  font-weight: 500;
}
.document-nav a:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: #fff;
}
.document-nav a.active {
  background-color: rgba(167, 139, 250, 0.15);
  color: #c4b5fd;
  pointer-events: none;
}

.document-content {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 30px 40px;
  color: #c2c2c2;
  line-height: 1.7;
}
.document-content h1 {
  font-size: 28px;
  color: #fff;
  margin: 0 0 8px 0;
}
.last-updated {
  font-size: 14px;
  color: #888;
  margin-bottom: 30px;
}
.document-content h2 {
  font-size: 20px;
  color: #fff;
  margin: 40px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.document-content p, .document-content li {
  margin-bottom: 16px;
}
.document-content ul, .document-content ol {
  padding-left: 20px;
}
.document-content a {
  color: #a78bfa;
  text-decoration: none;
}
.document-content a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .document-container {
    grid-template-columns: 1fr;
  }
  .document-nav {
    position: static;
  }
}