/* モダンなホームページスタイル */

/* メインコンテナ */
.home-container {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  animation: fadeIn var(--transition-slow) ease-out;
}

/* サイドバー */
.sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  animation: slideIn var(--transition-slow) ease-out;
}

.sidebar h2 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar h2::before {
  content: '🏠';
  font-size: 1.25rem;
}

/* コミュニティリスト */
.community-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.community-item {
  margin: 0;
}

.community-item a {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.community-item a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 3px;
  background: var(--primary-color);
  transform: scaleY(0);
  transition: transform var(--transition-fast);
}

.community-item a:hover {
  background: var(--primary-light);
  color: var(--primary-color);
  transform: translateX(4px);
}

.community-item a:hover::before {
  transform: scaleY(1);
}

/* メインコンテンツ */
.main-content {
  min-width: 0; /* グリッドのオーバーフロー対策 */
}

.main-content h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.main-content h1::before {
  content: '📝';
  font-size: 2.5rem;
}

/* トピックリスト */
.topic-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.topic-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.topic-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary-light) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.topic-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.topic-item:hover::before {
  opacity: 0.05;
}

/* トピックタイトル */
.topic-title {
  margin-bottom: 0.75rem;
}

.topic-title a {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  display: inline-block;
  transition: color var(--transition-fast);
}

.topic-title a:hover {
  color: var(--primary-color);
}

/* トピックメタ情報 */
.topic-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.community-name {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-tertiary);
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.community-name::before {
  content: '#';
  color: var(--primary-color);
  font-weight: 700;
}

.community-name a {
  color: var(--text-secondary);
}

.community-name:hover {
  background: var(--primary-light);
  transform: scale(1.05);
}

.community-name:hover a {
  color: var(--primary-color);
}

.user-name {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.user-name::before {
  content: '👤';
  font-size: 1rem;
}

.created-at {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.created-at::before {
  content: '🕐';
  font-size: 1rem;
}

/* ページネーション */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  padding: 1.5rem;
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.pagination a {
  color: var(--text-secondary);
  background: var(--bg-secondary);
}

.pagination a:hover {
  background: var(--primary-light);
  color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pagination .current {
  background: var(--primary-color);
  color: white;
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.pagination .disabled {
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  cursor: not-allowed;
  opacity: 0.5;
}

.pagination .gap {
  color: var(--text-tertiary);
}

.pagination .first,
.pagination .last {
  font-weight: 600;
}

.pagination .prev::before {
  content: '←';
  margin-right: 0.25rem;
}

.pagination .next::after {
  content: '→';
  margin-left: 0.25rem;
}

/* 空の状態 */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  border: 2px dashed var(--border-color);
}

.empty-state h3 {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.empty-state p {
  color: var(--text-tertiary);
  margin-bottom: 2rem;
}

/* レスポンシブデザイン */
@media (max-width: 1024px) {
  .home-container {
    grid-template-columns: 250px 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
  }
}

@media (max-width: 768px) {
  .home-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 1rem;
  }
  
  .sidebar {
    position: static;
    margin-bottom: 1.5rem;
  }
  
  .main-content h1 {
    font-size: 1.5rem;
  }
  
  .topic-item {
    padding: 1rem;
  }
  
  .topic-title a {
    font-size: 1.125rem;
  }
  
  .topic-meta {
    font-size: 0.8125rem;
  }
  
  .created-at {
    margin-left: 0;
    width: 100%;
    margin-top: 0.5rem;
  }
  
  .pagination {
    padding: 1rem;
    gap: 0.25rem;
  }
  
  .pagination a,
  .pagination span {
    min-width: 2rem;
    height: 2rem;
    padding: 0 0.5rem;
    font-size: 0.8125rem;
  }
}

/* アニメーション */
.topic-item {
  animation: fadeIn var(--transition-base) ease-out;
  animation-fill-mode: both;
}

.topic-item:nth-child(1) { animation-delay: 0ms; }
.topic-item:nth-child(2) { animation-delay: 50ms; }
.topic-item:nth-child(3) { animation-delay: 100ms; }
.topic-item:nth-child(4) { animation-delay: 150ms; }
.topic-item:nth-child(5) { animation-delay: 200ms; }
.topic-item:nth-child(6) { animation-delay: 250ms; }
.topic-item:nth-child(7) { animation-delay: 300ms; }
.topic-item:nth-child(8) { animation-delay: 350ms; }
.topic-item:nth-child(9) { animation-delay: 400ms; }
.topic-item:nth-child(10) { animation-delay: 450ms; }