/* モダンな掲示板スタイル */

/* フォーラムコンテナ */
.forum-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
  animation: fadeIn var(--transition-slow) ease-out;
}

/* コミュニティ詳細ページ */
.community-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
  animation: fadeIn var(--transition-slow) ease-out;
}

/* コミュニティヘッダー */
.community-header {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.community-header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
  opacity: 0.3;
}

.community-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.community-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.community-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  position: relative;
  z-index: 1;
}

.community-slug {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-tertiary);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-weight: 500;
  font-family: var(--font-mono);
}

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

/* コミュニティコンテンツ */
.community-content h2 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.community-content h2::before {
  content: '💬';
  font-size: 2rem;
}

/* トピックリスト（フォーラム用） */
.forum-topic-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* アクションボタン */
.community-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.button:hover::before {
  width: 300px;
  height: 300px;
}

.button-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
  color: white;
  box-shadow: var(--shadow);
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.button-secondary {
  background: var(--gray-600);
  color: white;
}

.button-secondary:hover {
  background: var(--gray-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.button-danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
}

.button-danger:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* トピック（スレッド）表示 */
.forum-topic {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2rem;
  margin-bottom: 2rem;
  animation: slideIn var(--transition-base) ease-out;
}

.forum-topic-header {
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
}

.forum-topic-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.forum-topic-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.forum-topic-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.forum-topic-meta span::before {
  font-size: 1rem;
}

.forum-topic-meta .author::before {
  content: '✍️';
}

.forum-topic-meta .date::before {
  content: '📅';
}

.forum-topic-body {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text-primary);
  white-space: pre-wrap;
}

/* 投稿リスト */
.forum-posts {
  margin-top: 2rem;
}

.forum-posts h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.forum-posts h2::before {
  content: '💭';
  font-size: 1.75rem;
}

/* 個別投稿 */
.forum-post {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: all var(--transition-base);
  position: relative;
  animation: fadeIn var(--transition-base) ease-out;
  animation-fill-mode: both;
}

.forum-post:nth-child(1) { animation-delay: 0ms; }
.forum-post:nth-child(2) { animation-delay: 50ms; }
.forum-post:nth-child(3) { animation-delay: 100ms; }
.forum-post:nth-child(4) { animation-delay: 150ms; }
.forum-post:nth-child(5) { animation-delay: 200ms; }

.forum-post:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
  border-color: var(--primary-color);
}


.forum-post-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.forum-post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.post-author {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.post-author::before {
  content: '👤';
  font-size: 1rem;
}

.post-date-link {
  color: var(--text-tertiary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: color var(--transition-fast);
}

.post-date-link::before {
  content: '🔗';
  font-size: 0.875rem;
}

.post-date-link:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

.forum-post-body {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
}

/* アクションエリア */
.forum-actions {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

/* 新規投稿フォーム */
.forum-new-post {
  margin-top: 3rem;
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border: 2px solid var(--primary-light);
}

.forum-new-post h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.forum-new-post h2::before {
  content: '✏️';
  font-size: 1.75rem;
}

/* フォーム要素 */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* 空の状態 */
.no-topics {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  border: 2px dashed var(--border-color);
  color: var(--text-tertiary);
}

.no-topics::before {
  content: '📭';
  display: block;
  font-size: 3rem;
  margin-bottom: 1rem;
}

/* 関連トピックセクション */
.forum-related-topics {
  margin-top: 3rem;
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--primary-color);
}

.forum-related-topics h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.forum-related-topics h2::before {
  content: '🔗';
  font-size: 1.75rem;
}

.related-topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

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

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

.related-topic-link {
  text-decoration: none;
  color: inherit;
  display: block;
  height: 100%;
}

.related-topic-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-topic-body {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-topic-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: auto;
}

.related-topic-user {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 500;
}

.related-topic-user::before {
  content: '👤';
  font-size: 0.875rem;
}

.related-topic-date {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.related-topic-date::before {
  content: '📅';
  font-size: 0.875rem;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
  .forum-container,
  .community-container {
    padding: 1rem;
  }
  
  .community-header {
    padding: 1.5rem;
  }
  
  .community-header h1 {
    font-size: 1.75rem;
  }
  
  .forum-topic-title {
    font-size: 1.5rem;
  }
  
  .forum-topic,
  .forum-new-post,
  .forum-related-topics {
    padding: 1.5rem;
  }
  
  .forum-post {
    padding: 1rem;
  }
  
  .community-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .button {
    width: 100%;
    justify-content: center;
  }
  
  .forum-post-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .related-topics-grid {
    grid-template-columns: 1fr;
  }
  
  .related-topic {
    padding: 1rem;
  }
}

/* ローディング状態 */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 4rem;
}

.loading::after {
  content: '';
  width: 40px;
  height: 40px;
  border: 4px solid var(--gray-300);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}