/* ============================================
   ブログページ専用スタイル
   landing.css の変数・ベーススタイルを継承
   ============================================ */

.blog-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(to bottom, hsl(var(--background)), hsl(var(--muted) / 0.2));
  font-family: 'Noto Sans JP', 'Inter', 'system-ui', sans-serif;
  font-feature-settings: "palt";
  color: hsl(var(--foreground));
}

.blog-page * {
  box-sizing: border-box;
}

/* ============================================
   ヘッダー
   ============================================ */
.blog-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: hsl(var(--background) / 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid hsl(var(--border));
}

.blog-header-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

@media (min-width: 640px) {
  .blog-header-nav {
    padding: 0 1.5rem;
    height: 4rem;
  }
}

.blog-logo-link {
  display: inline-block;
  text-decoration: none;
}

.blog-back-link {
  display: none !important;
}

.blog-logo {
  height: 1.5rem;
  width: auto;
  object-fit: contain;
}

@media (min-width: 640px) {
  .blog-logo {
    height: 2rem;
  }
}

/* ============================================
   メインコンテンツ
   ============================================ */
.blog-main {
  flex: 1;
  padding: 3rem 1rem;
}

@media (min-width: 640px) {
  .blog-main {
    padding: 4rem 1.5rem;
  }
}

.blog-container {
  max-width: 760px;
  margin: 0 auto;
}

.blog-title {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 900;
  color: hsl(var(--foreground));
  text-align: center;
  margin-bottom: 1rem;
}

.blog-title-primary {
  color: hsl(var(--primary));
}

.blog-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 500;
  color: hsl(var(--muted-foreground));
  text-align: center;
  margin-bottom: 2.5rem;
}

/* ============================================
   カテゴリフィルタータブ
   ============================================ */
.blog-filter-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.blog-filter-tab {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  color: hsl(var(--muted-foreground));
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.blog-filter-tab:hover {
  color: hsl(var(--foreground));
  border-color: hsl(var(--primary) / 0.3);
}

.blog-filter-tab.is-active {
  color: hsl(var(--primary-foreground));
  background: hsl(var(--primary));
  border-color: hsl(var(--primary));
}

@media (min-width: 640px) {
  .blog-filter-tab {
    padding: 0.625rem 1.5rem;
    font-size: 1rem;
  }
}

/* ============================================
   記事カードグリッド
   ============================================ */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* landing-media-card スタイルを再利用 */
.blog-grid .landing-media-card {
  opacity: 1;
  transform: none;
}

.blog-grid .landing-media-card.blog-card-animate {
  opacity: 0;
  transform: translateY(20px);
  animation: blogFadeInUp 0.4s ease forwards;
}

@keyframes blogFadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   もっと読み込むボタン
   ============================================ */
.blog-load-more-wrapper {
  text-align: center;
  margin-top: 2.5rem;
}

.blog-load-more-btn {
  padding: 0.875rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: hsl(var(--foreground));
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
}

.blog-load-more-btn:hover {
  background: hsl(var(--muted));
  border-color: hsl(var(--primary) / 0.3);
}

.blog-load-more-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.blog-load-more-btn i {
  margin-left: 0.5rem;
}

/* ============================================
   空の状態
   ============================================ */
.blog-empty {
  text-align: center;
  padding: 4rem 1rem;
  color: hsl(var(--muted-foreground));
}

.blog-empty i {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.blog-empty p {
  font-size: 1.125rem;
  font-weight: 500;
}

/* ============================================
   フッター
   ============================================ */
.blog-footer {
  border-top: 1px solid hsl(var(--border));
  background: hsl(var(--background));
}

.blog-footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

@media (min-width: 768px) {
  .blog-footer-container {
    flex-direction: row;
    padding: 3rem 1.5rem;
  }
}

.blog-footer-logo-link {
  display: inline-block;
  text-decoration: none;
}

.blog-footer-logo {
  height: 1.5rem;
  width: auto;
  object-fit: contain;
}

@media (min-width: 640px) {
  .blog-footer-logo {
    height: 2rem;
  }
}

.blog-footer-copyright {
  font-size: 0.75rem;
  color: hsl(var(--muted-foreground));
  text-align: center;
}

.blog-footer-copyright-link {
  color: hsl(var(--muted-foreground));
  text-decoration: none;
}

.blog-footer-copyright-link:hover {
  text-decoration: underline;
}