:root {
  --article-max-width: 780px;
  --article-card: #ffffff;
  --article-border: #e3e7ef;
  --article-muted: #6f7683;
  --article-accent: #59b97c;
  --article-accent-hover: #63c184;
}

main.article-main {
  max-width: var(--article-max-width);
  margin: 1.1rem auto 2rem;
  padding: 2rem 1.25rem 3rem;
}

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

.article-header h1 {
  margin: 0 0 0.75rem;
  line-height: 1.25;
  font-size: clamp(1.8rem, 2.5vw, 2.4rem);
}

.article-intro {
  margin: 0;
  color: var(--article-muted);
  font-size: 1.08rem;
}

.article-content h2 {
  margin: 2.1rem 0 0.85rem;
  line-height: 1.3;
  font-size: clamp(1.3rem, 2vw, 1.7rem);
}

.article-content p {
  margin: 0 0 1.05rem;
  line-height: 1.8;
}

.article-content ul {
  margin: 0.5rem 0 1.2rem 1.25rem;
  padding: 0;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-box {
  margin: 1.2rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--article-border);
  border-radius: 10px;
  background: var(--article-card);
  box-shadow: 0 6px 16px rgba(25, 38, 69, 0.06);
}

.article-footer-links {
  margin-top: 2.7rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--article-border);
}

.article-footer-links h2 {
  margin-top: 0;
}

.tool-grid {
  margin-top: 0.9rem;
}

.tool-grid .article-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  color: #1f2430;
}

.tool-grid .article-card p {
  margin-bottom: 0.9rem;
}

.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.2rem;
}

.article-card {
  border: 1px solid var(--article-border);
  border-radius: 12px;
  background: var(--article-card);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow-soft);
}

.article-card h2 {
  margin: 0 0 0.45rem;
  font-size: 1.2rem;
  color: #1f2430;
}

.article-card p {
  margin: 0 0 0.95rem;
  color: var(--article-muted);
  line-height: 1.7;
}

.article-button {
  display: inline-block;
  padding: 0.55rem 0.95rem;
  border-radius: 8px;
  background: var(--success);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.article-button:hover {
  background: var(--article-accent-hover);
  color: #ffffff;
  text-decoration: none;
}

.breadcrumb {
  margin: 0 0 1.2rem;
  font-size: 0.92rem;
  color: var(--article-muted);
}

.breadcrumb a {
  color: var(--article-accent);
}

@media (max-width: 820px) {
  nav ul {
    flex-wrap: wrap;
    gap: 0.85rem;
  }

  main.article-main {
    padding-top: 1.5rem;
  }
}