/* ============================================================
   Blog Styles — ひなたコンサルティング
   ============================================================ */

/* ---------- Blog Hero ---------- */
.blog-hero {
  background: linear-gradient(135deg, #f0f7ff 0%, #e0f2fe 50%, #fefcf6 100%);
  padding: 140px 0 64px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.blog-hero .section-label {
  margin-bottom: 12px;
}

.blog-hero .section-title {
  margin-bottom: 14px;
}

.blog-hero .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Category Filter ---------- */
.category-filter {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 32px 0 0;
}

.category-btn {
  padding: 8px 22px;
  border: 1.5px solid var(--color-border);
  border-radius: 50px;
  background: var(--color-white);
  color: var(--color-text-sub);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.category-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(2, 132, 199, 0.06);
}

.category-btn.active {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.25);
}

/* ---------- Blog Grid ---------- */
.blog-grid-section {
  padding: 64px 0 96px;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.blog-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  border-color: #bae6fd;
}

.blog-card-body {
  padding: 28px 28px 32px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.blog-card-date {
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-light);
}

.blog-card-category {
  display: inline-flex;
  padding: 3px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.blog-card-category[data-cat="it-dx"] {
  background: #e0f2fe;
  color: #0369a1;
}

.blog-card-category[data-cat="keiei"] {
  background: #fef3c7;
  color: #92400e;
}

.blog-card-category[data-cat="ai"] {
  background: #ede9fe;
  color: #5b21b6;
}

.blog-card-category[data-cat="hojokin"] {
  background: #f0fdf4;
  color: #166534;
}

.blog-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.55;
  margin-bottom: 12px;
}

.blog-card-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.blog-card-title a:hover {
  color: var(--color-accent);
}

.blog-card-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  line-height: 1.8;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-footer {
  padding: 0 28px 24px;
}

.blog-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: gap var(--transition-fast);
}

.blog-card-link:hover {
  gap: 10px;
  color: var(--color-accent-hover);
}

.blog-card-link svg {
  width: 16px;
  height: 16px;
}

/* Empty state */
.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
  color: var(--color-text-sub);
}

.blog-empty svg {
  width: 48px;
  height: 48px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.blog-empty h3 {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

/* ---------- Article Page ---------- */
.article-hero {
  background: linear-gradient(135deg, #f0f7ff 0%, #e0f2fe 50%, #fefcf6 100%);
  padding: 120px 0 48px;
  border-bottom: 1px solid var(--color-border);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.article-breadcrumb a {
  color: var(--color-text-sub);
  font-weight: 500;
}

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

.article-breadcrumb .sep {
  color: var(--color-text-light);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.article-date {
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-sub);
}

.article-category {
  display: inline-flex;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
}

.article-category[data-cat="it-dx"] {
  background: #e0f2fe;
  color: #0369a1;
}

.article-category[data-cat="keiei"] {
  background: #fef3c7;
  color: #92400e;
}

.article-category[data-cat="ai"] {
  background: #ede9fe;
  color: #5b21b6;
}

.article-category[data-cat="hojokin"] {
  background: #f0fdf4;
  color: #166534;
}

.article-title {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.45;
  letter-spacing: -0.02em;
}

/* ---------- Article Body ---------- */
.article-section {
  padding: 56px 0 96px;
}

.article-container {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--container-padding);
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 48px 0 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
  line-height: 1.5;
}

.article-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 36px 0 14px;
  padding-left: 14px;
  border-left: 3px solid var(--color-gold);
}

.article-body p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 2;
  margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
  margin: 16px 0 24px;
  padding-left: 24px;
}

.article-body ul {
  list-style: none;
  padding-left: 0;
}

.article-body ul li {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.9;
  padding: 6px 0 6px 24px;
  position: relative;
}

.article-body ul li::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.5;
}

.article-body ol {
  list-style: decimal;
}

.article-body ol li {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.9;
  padding: 4px 0;
}

.article-body strong {
  font-weight: 700;
  color: var(--color-primary);
}

.article-body blockquote {
  margin: 28px 0;
  padding: 24px 28px;
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.95rem;
  color: var(--color-text-sub);
  line-height: 1.9;
}

.article-callout {
  margin: 32px 0;
  padding: 28px 32px;
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  border: 1px solid #fde68a;
  border-radius: var(--radius-md);
}

.article-callout-title {
  font-weight: 700;
  color: #92400e;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-callout p {
  color: #78350f;
  font-size: 0.925rem;
  margin-bottom: 0;
}

/* ---------- Article Footer ---------- */
.article-footer-nav {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.article-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--color-accent);
  padding: 10px 24px;
  border: 1.5px solid var(--color-border);
  border-radius: 50px;
  transition: all var(--transition-fast);
}

.article-back-link:hover {
  border-color: var(--color-accent);
  background: rgba(2, 132, 199, 0.06);
  color: var(--color-accent-hover);
}

.article-back-link svg {
  width: 16px;
  height: 16px;
}

/* ---------- CTA Banner ---------- */
.blog-cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e3a5f 100%);
  padding: 56px 0;
  text-align: center;
}

.blog-cta-banner h3 {
  color: var(--color-white);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.blog-cta-banner p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1rem;
  margin-bottom: 28px;
}

.blog-cta-banner .btn-gold {
  font-size: 1rem;
  padding: 16px 36px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .blog-hero {
    padding: 120px 0 48px;
  }

  .blog-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .category-filter {
    gap: 8px;
  }

  .category-btn {
    padding: 7px 16px;
    font-size: 0.8125rem;
  }

  .article-hero {
    padding: 100px 0 36px;
  }

  .article-body h2 {
    font-size: 1.25rem;
    margin: 36px 0 14px;
  }

  .article-body h3 {
    font-size: 1.05rem;
  }

  .article-footer-nav {
    flex-direction: column;
    gap: 16px;
  }

  .blog-cta-banner h3 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .blog-card-body {
    padding: 22px 20px 24px;
  }

  .blog-card-footer {
    padding: 0 20px 20px;
  }

  .article-callout {
    padding: 20px 20px;
  }
}