/* ============================================================
   QuickTools — SEO Content Sections (공유 스타일)
   모든 툴 페이지와 메인 페이지에서 링크해서 사용합니다.
   ============================================================ */

.seo-content {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--border-color);
}

.seo-intro {
  margin-bottom: 36px;
}

.seo-intro h2 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.seo-intro p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
  max-width: 680px;
}

/* ── Use-cases + How-to Grid ── */
.seo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 36px;
}

.seo-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  transition: border-color 0.25s;
}

.seo-card:hover {
  border-color: var(--primary-color);
}

.seo-card h3 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.seo-card ul,
.seo-card ol {
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.seo-card li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── FAQ ── */
.faq-section {
  margin-bottom: 36px;
}

.faq-section > h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 8px;
  overflow: hidden;
  background: var(--bg-secondary);
  transition: border-color 0.2s;
}

.faq-item:hover {
  border-color: var(--primary-color);
}

.faq-item summary {
  padding: 15px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  user-select: none;
  -webkit-user-select: none;
}

.faq-item summary::before {
  content: 'Q.';
  color: var(--primary-color);
  font-weight: 800;
  font-size: 0.82rem;
  flex-shrink: 0;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item[open] summary {
  color: var(--primary-color);
}

.faq-answer {
  padding: 12px 20px 16px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid var(--border-color);
}

/* ── Related Tools ── */
.related-section {
  margin-bottom: 20px;
}

.related-section h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.related-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 1.5px solid var(--border-color);
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  background: var(--bg-secondary);
  transition: all 0.2s;
}

.related-link:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background: var(--primary-light);
  transform: translateY(-1px);
}

/* ── Main page SEO section ── */
.about-section {
  margin-top: 60px;
  padding: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
}

.about-section h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.about-section p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 20px;
}

.about-section p:last-child { margin-bottom: 0; }

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.use-case-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 20px;
}

.use-case-card h3 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.use-case-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
}

/* ── Responsive ── */
@media (max-width: 680px) {
  .seo-grid { grid-template-columns: 1fr; }
  .use-cases-grid { grid-template-columns: 1fr; }
  .about-section { padding: 24px 20px; }
  .seo-intro h2 { font-size: 1.2rem; }
}