/* ===== INFO PAGE STYLES ===== */
.article {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.article__hero {
  text-align: center;
  padding: 3rem 0 2rem;
}
.article__hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.article__intro {
  font-size: 1.05rem;
  color: var(--ink-secondary);
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto;
}

/* TABLE OF CONTENTS */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  margin-bottom: 3rem;
}
.toc h2 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  margin-bottom: 0.75rem;
}
.toc ol {
  list-style: none;
  counter-reset: toc;
  padding: 0;
}
.toc li {
  counter-increment: toc;
  margin-bottom: 0.4rem;
}
.toc li::before {
  content: counter(toc) ".";
  color: var(--accent);
  font-weight: 600;
  margin-right: 0.5rem;
  font-size: 0.85rem;
}
.toc a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color var(--transition);
}
.toc a:hover { color: var(--accent); }

/* SECTIONS */
.article__section {
  margin-bottom: 3rem;
}
.article__section h2 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
}
.article__section h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.article__section p {
  color: var(--ink-secondary);
  line-height: 1.75;
  margin-bottom: 1rem;
}
.article__section ol,
.article__section ul {
  color: var(--ink-secondary);
  line-height: 1.75;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}
.article__section li {
  margin-bottom: 0.5rem;
}
.article__section code {
  background: var(--bg-subtle);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85rem;
}

/* TYPE CARDS */
.type-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.type-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: all var(--transition);
}
.type-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.type-card h3 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}
.type-card p {
  font-size: 0.85rem;
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.6;
}

/* USE CASES GRID */
.use-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.use-item {
  background: var(--bg-subtle);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.use-item h3 {
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
  color: var(--ink);
}
.use-item p {
  font-size: 0.85rem;
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.6;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item[open] {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.faq-item summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--ink);
  transition: color var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--ink-muted);
  transition: transform var(--transition);
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--accent);
}
.faq-item summary:hover { color: var(--accent); }
.faq-item p {
  padding: 0 1.25rem 1rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  margin: 0;
}

/* CTA */
.article__cta {
  text-align: center;
  background: var(--accent-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 3rem 2rem;
  margin-top: 3rem;
}
.article__cta h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.article__cta p {
  color: var(--ink-secondary);
  margin-bottom: 1.5rem;
}
.cta-link {
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  margin-top: 0.5rem;
}
.cta-link:hover { text-decoration: underline; }

/* RESPONSIVE */
@media (max-width: 600px) {
  .article { padding: 0 1rem 3rem; }
  .article__hero { padding: 2rem 0 1.5rem; }
  .toc { padding: 1rem 1.25rem; }
  .type-cards { grid-template-columns: 1fr; }
  .use-grid { grid-template-columns: 1fr; }
}