/* ========================================
   ページ内ナビゲーション のレスポンシブ対応
   ======================================== */

.page-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: white;
  border-bottom: 1px solid #e5e7eb;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.page-nav-container {
  display: flex;
  flex-wrap: wrap; /* 改行を許可 */
  padding: 1rem 0;
  gap: 0.75rem;
}

.nav-btn {
  white-space: nowrap;
  padding: 0.5rem 1.5rem;
  border-radius: 9999px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

/* スクロール先のセクションがナビゲーションバーの下に隠れないようにする */
.magazine-section,
.links-section,
.category-section {
  scroll-margin-top: 120px; /* ナビゲーションバーの高さ + 余白 */
}

/* IDを持つすべての要素に適用 */
[id] {
  scroll-margin-top: 120px;
}

/* スクロールバーを非表示 */
.scrollbar-hide::-webkit-scrollbar {
  display: none;
}

.scrollbar-hide {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

@media (max-width: 768px) {
  .page-nav-container {
    gap: 0.5rem;
    padding: 0.75rem 0;
  }

  .nav-btn {
    padding: 0.4rem 1rem;
    font-size: 0.8rem;
  }

  .nav-btn i {
    font-size: 1rem;
  }

  /* モバイルではナビゲーションバーの高さが異なる可能性があるため調整 */
  .magazine-section,
  .links-section,
  .category-section,
  [id] {
    scroll-margin-top: 100px;
  }
}

@media (max-width: 480px) {
  .nav-btn {
    padding: 0.35rem 0.875rem;
    font-size: 0.75rem;
  }

  .magazine-section,
  .links-section,
  .category-section,
  [id] {
    scroll-margin-top: 90px;
  }
}

/* ========================================
   メインコンテンツ のレスポンシブ対応
   ======================================== */

.main-content {
  padding: 3rem 0;
}

@media (max-width: 768px) {
  .main-content {
    padding: 2rem 0;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: 1.5rem 0;
  }
}

/* ========================================
   セクションヘッダー のレスポンシブ対応
   ======================================== */

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #111827;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.section-icon i {
  color: white;
  font-size: 1rem;
}

@media (max-width: 768px) {
  .section-header {
    margin-bottom: 1.5rem;
  }

  .section-title {
    font-size: 1.25rem;
    gap: 0.5rem;
  }

  .section-icon {
    width: 1.75rem;
    height: 1.75rem;
  }

  .section-icon i {
    font-size: 0.875rem;
  }
}

@media (max-width: 480px) {
  .section-header {
    margin-bottom: 1.25rem;
  }

  .section-title {
    font-size: 1.125rem;
  }

  .section-icon {
    width: 1.5rem;
    height: 1.5rem;
  }

  .section-icon i {
    font-size: 0.75rem;
  }
}

/* ========================================
   会報誌グリッド のレスポンシブ対応
   ======================================== */

.magazine-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.magazine-card {
  background: white;
  border-radius: 0.75rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  padding: 1.5rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.magazine-card:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
}

.link_pdf_photo {
  width: 100%;
  aspect-ratio: 4 / 3; /* 縦横比を4:3に固定（横長） */
  object-fit: cover; /* 画像を枠に合わせて中央部分を切り抜き */
  object-position: center; /* 中央を基準に切り抜き */
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  display: block;
}

.magazine-date {
  font-size: 0.875rem;
  color: #6b7280;
  margin-bottom: 0.5rem;
}

.magazine-title {
  font-size: 1rem;
  font-weight: 600;
  color: #111827;
  margin-bottom: 0.5rem;
}

.magazine-description {
  font-size: 0.875rem;
  color: #4b5563;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.magazine-download-btn {
  display: inline-block;
  background-color: rgba(30, 64, 175, 0.05);
  color: #1e40af;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color 0.2s;
  cursor: pointer;
}

.magazine-download-btn:hover {
  background-color: rgba(30, 64, 175, 0.1);
}

/* 3xl: 小型ノートPC (1024px) */
@media (max-width: 1024px) {
  .magazine-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

/* x-large: 一般的タブレット (768px) */
@media (max-width: 768px) {
  .magazine-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 3rem;
  }

  .magazine-card {
    padding: 1.25rem;
  }

  .magazine-title {
    font-size: 0.95rem;
  }

  .magazine-description {
    font-size: 0.8rem;
  }

  .magazine-download-btn {
    font-size: 0.8rem;
    padding: 0.4rem 0.875rem;
  }
}

/* medium: スマホ横・大型スマホ (480px) */
@media (max-width: 480px) {
  .magazine-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .magazine-card {
    padding: 1rem;
  }

  .magazine-date {
    font-size: 0.8rem;
  }

  .magazine-title {
    font-size: 0.9rem;
  }

  .magazine-description {
    font-size: 0.75rem;
  }

  .magazine-download-btn {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    width: 100%;
    text-align: center;
  }
}

/* ========================================
   リンクセクション のレスポンシブ対応
   ======================================== */

.links-section {
  margin-bottom: 4rem;
}

.category-section {
  margin-bottom: 2rem;
}

.category-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #9ca3af;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.link-card {
  background: white;
  border-radius: 0.75rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  padding: 1.5rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.link-card:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  transform: translateY(-4px);
}

.link-title {
  font-size: 1rem;
  font-weight: 600;
  color: #111827;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.link-description {
  font-size: 0.875rem;
  color: #4b5563;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.link-external {
  color: #0891b2;
  font-weight: 500;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.2s;
}

.link-external:hover {
  color: #0e7490;
}

/* 3xl: 小型ノートPC (1024px) */
@media (max-width: 1024px) {
  .links-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

/* x-large: 一般的タブレット (768px) */
@media (max-width: 768px) {
  .links-section {
    margin-bottom: 3rem;
  }

  .category-section {
    margin-bottom: 1.5rem;
  }

  .category-title {
    font-size: 1rem;
    margin-bottom: 0.875rem;
  }

  .links-grid {
    gap: 1rem;
  }

  .link-card {
    padding: 1.25rem;
  }

  .link-title {
    font-size: 0.95rem;
  }

  .link-description {
    font-size: 0.8rem;
  }

  .link-external {
    font-size: 0.8rem;
  }
}

/* medium: スマホ横・大型スマホ (480px) */
@media (max-width: 480px) {
  .links-section {
    margin-bottom: 2rem;
  }

  .category-section {
    margin-bottom: 1.25rem;
  }

  .category-title {
    font-size: 0.95rem;
  }

  .links-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .link-card {
    padding: 1rem;
  }

  .link-title {
    font-size: 0.9rem;
  }

  .link-description {
    font-size: 0.75rem;
  }

  .link-external {
    font-size: 0.75rem;
  }
}

/* ========================================
   空状態表示 のレスポンシブ対応
   ======================================== */

.empty-state {
  text-align: center;
  padding: 3rem 0;
  color: #6b7280;
}

@media (max-width: 768px) {
  .empty-state {
    padding: 2rem 0;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .empty-state {
    padding: 1.5rem 0;
    font-size: 0.85rem;
  }
}