/* ベース */
body { margin: 0; color: #222; background: #fff; }
a { text-decoration: none; }
a:hover { text-decoration: underline; }

/* ヘッダー/フッター */
.tn-header, .tn-footer { width: 100%; box-sizing: border-box; }
.tn-header { border-bottom: 1px solid #e5e5e5; padding: 10px 16px; }
.tn-footer { border-top: 1px solid #e5e5e5; padding: 16px; margin-top: 24px; font-size: 14px; color: #666; }
.tn-nav { display: flex; flex-wrap: wrap; gap: 12px; list-style: none; margin: 0; padding: 0; }
.tn-brand a { font-weight: 700; margin-right: 12px; }

/* 2カラムレイアウト */
.tn-container { max-width: 1180px; margin: 0 auto; padding: 16px; }
.tn-columns { display: grid; grid-template-columns: 1fr 320px; gap: 24px; }
@media (max-width: 960px) {
  .tn-columns { grid-template-columns: 1fr; }
}

/* サイドバー */
.tn-widget { border: 1px solid #eee; padding: 12px; margin: 0 0 16px 0; }
.tn-widget h3 { margin: 0 0 8px 0; font-size: 16px; }
.tn-catlist { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr; gap: 6px; }
.tn-twoaxes-form { display: grid; gap: 8px; margin-top: 8px; }
.tn-twoaxes-form select, .tn-twoaxes-form button { padding: 6px 8px; }

/* 投稿一覧 */
.tn-post { padding: 8px 0; border-bottom: 1px solid #f0f0f0; }
.tn-muted { color: #777; font-size: 14px; }

/* category-axes 表示 */
.tn-box { border: 1px solid #eee; padding: 12px; margin-bottom: 16px; }