/* ═══════════════════════════════════════════════════
   Solutions (Parent) Page Styles
   ═══════════════════════════════════════════════════ */

.section-solution-categories { padding: 100px 0; }

.solution-categories-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 48px;
}

.solution-category-card {
  display: flex;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.solution-category-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-4px);
  border-color: transparent;
}

.solution-category-img {
  width: 45%;
  min-height: 280px;
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
}

.solution-category-body {
  flex: 1;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.solution-category-title {
  font-size: 24px;
  font-weight: var(--fw-medium);
  color: var(--color-primary);
  margin-bottom: 12px;
}

.solution-category-desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-muted);
  margin-bottom: 20px;
  flex: 1;
}

.solution-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.solution-link::after {
  content: '›';
  font-size: 18px;
  transition: transform 0.3s ease;
}

.solution-category-card:hover .solution-link::after {
  transform: translateX(4px);
}

/* Article grid (shared by formula-library & tech-posts) */
.section-article-list { padding: 100px 0; }

/* Formula filter bar */
.formula-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.formula-filter-btn {
  padding: 8px 20px;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  background: #fff;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.formula-filter-btn:hover {
  border-color: var(--color-primary);
}

.formula-filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.article-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-4px);
  border-color: transparent;
}

.article-card-img {
  width: 100%;
  aspect-ratio: 16/10;
  background-size: cover;
  background-position: center;
}

.article-card-body {
  padding: 24px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-title {
  font-size: 17px;
  font-weight: var(--fw-medium);
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.article-card-excerpt {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  flex: 1;
  margin-bottom: 16px;
}

.article-card-meta {
  font-size: 12px;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-card-date {
  font-family: var(--font-en-sans);
}

.article-card-tag {
  padding: 2px 8px;
  background: var(--color-secondary);
  border-radius: 4px;
  color: var(--color-primary);
}

/* Tech Posts Layout - Sidebar + List */
.section-tech-posts-layout { padding: 100px 0; }

.tech-posts-wrapper {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
}

.tech-posts-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tech-post-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

.tech-post-item:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
  border-color: transparent;
}

.tech-post-item-img {
  width: 120px;
  height: 90px;
  flex-shrink: 0;
  border-radius: 6px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  background-color: var(--color-surface);
}

.tech-post-item-body {
  flex: 1;
  min-width: 0;
}

.tech-post-item-label {
  font-size: 12px;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 6px;
  display: block;
}

.tech-post-item-title {
  font-size: 17px;
  font-weight: var(--fw-medium);
  color: var(--color-primary);
  line-height: 1.4;
  margin: 0;
}

.tech-post-item:hover .tech-post-item-title {
  color: var(--color-primary-hover);
}

@media (max-width: 1024px) {
  .solution-categories-hero { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-posts-wrapper { grid-template-columns: 1fr; }
  .rm-sidebar { position: static; }
  .rm-sidebar-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }
  .rm-cat-link {
    padding: 8px 16px;
    background: var(--color-surface);
    border-radius: 100px;
  }
  .rm-cat-link:hover,
  .rm-cat-link.active {
    background: var(--color-primary);
    color: #fff;
  }
}

@media (max-width: 768px) {
  .solution-category-card { flex-direction: column; }
  .solution-category-img { width: 100%; min-height: 200px; }
  .article-grid { grid-template-columns: 1fr; }
  .tech-post-item {
    padding: 16px;
    gap: 16px;
  }
  .tech-post-item-img {
    width: 100px;
    height: 75px;
  }
  .tech-post-item-title {
    font-size: 15px;
  }
}