body { background: #f5f6f8; padding-bottom: 3rem; }

/* ヘッダ */
.site-header {
  background: #4a154b; /* アクセントカラー (Slack aubergine) */
  color: #fff;
  padding: 1.2rem 0;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
}
.site-header .brand { font-size: 1.4rem; font-weight: bold; margin: 0; }
.site-header .brand .hash { opacity: .6; }
.site-header .subtitle { opacity: .8; font-size: .9rem; margin: .2rem 0 0; }

/* チャンネル選択バー */
#channel-bar {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1.2rem;
}
#channel-bar { flex-wrap: wrap; }
#channel-bar label { margin: 0; font-weight: bold; color: #555; white-space: nowrap; }
#channel-select {
  display: inline-block;
  width: auto;
  min-width: 12rem;
  padding: .4rem .6rem;
  border: 1px solid #ccc;
  border-radius: .35rem;
  background: #fff;
  font-size: 1rem;
}

/* ナビゲーションボタン(全ログ / 日付一覧) */
.nav-btn {
  padding: .4rem .9rem;
  border: 1px solid #4a154b;
  border-radius: .35rem;
  background: #fff;
  color: #4a154b;
  font-size: .95rem;
  cursor: pointer;
}
.nav-btn:hover { background: #f3e9f4; }
.nav-btn.active { background: #4a154b; color: #fff; }

/* 検索フォーム */
#search-form {
  display: flex;
  align-items: center;
  gap: .4rem;
  margin: 0;
}
#search-input {
  display: inline-block;
  width: auto;
  min-width: 10rem;
  padding: .4rem .6rem;
  border: 1px solid #ccc;
  border-radius: .35rem;
  font-size: .95rem;
}

/* 検索結果 */
.search-count { color: #666; font-size: .9rem; margin: 0 0 .8rem; }
.search-result { margin-bottom: .5em; }
.search-result .search-date {
  display: inline-block;
  color: #1264a3;
  text-decoration: none;
  padding: 0 .5rem;
  margin-right: .3rem;
  border: 1px solid #e3e5e8;
  border-radius: .35rem;
  background: #f8f8fa;
  font-size: .85rem;
  font-variant-numeric: tabular-nums;
}
.search-result .search-date:hover { background: #eef4fb; border-color: #1264a3; }
#log mark {
  background: #ffe58a;
  color: inherit;
  padding: 0 .1em;
  border-radius: .2rem;
}

/* 日付一覧 */
.date-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}
.date-list a {
  display: inline-block;
  padding: .5rem .9rem;
  border: 1px solid #e3e5e8;
  border-radius: .4rem;
  background: #f8f8fa;
  color: #1264a3;
  text-decoration: none;
  font-variant-numeric: tabular-nums;
}
.date-list a:hover { background: #eef4fb; border-color: #1264a3; }

/* 1日分表示の前後移動バー */
.day-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
  flex-wrap: wrap;
  margin: .3rem 0 1rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid #eee;
}
.day-nav + h1 { margin-top: .3rem; }
.day-nav a {
  color: #1264a3;
  text-decoration: none;
  padding: .35rem .7rem;
  border: 1px solid #e3e5e8;
  border-radius: .4rem;
  background: #f8f8fa;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.day-nav a:hover { background: #eef4fb; border-color: #1264a3; }
.day-nav .nav-list { color: #4a154b; }
.day-nav .nav-disabled {
  color: #bbb;
  padding: .35rem .7rem;
  white-space: nowrap;
}

/* ログ本体をカード風に */
.log-card {
  background: #fff;
  border: 1px solid #e3e5e8;
  border-radius: .6rem;
  padding: 1.2rem 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}

/* chat.js が生成する見出し */
#log h1 {
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0 0 1rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid #4a154b;
  color: #4a154b;
}
#log h2 {
  font-size: 1rem;
  color: #666;
  background: #f1f2f4;
  border-radius: 1rem;
  padding: .25rem .9rem;
  display: inline-block;
  margin: 1.6rem 0 .8rem;
}

/* メッセージ */
.author { color: #007a5a; font-weight: bold; }
.mention { color: #1264a3; font-weight: bold; }
.msg {
  margin-bottom: .35em;
  padding: .15rem .4rem;
  border-radius: .35rem;
  line-height: 1.5;
}
.msg:hover { background: #f8f8fa; }
.attachment { color: #666; font-size: .9rem; }
#log a { color: #1264a3; }

/* rich_text(書式付き Slack メッセージ)の描画 */
.msg blockquote {
  margin: .2em 0;
  padding: .1em 0 .1em .8em;
  border-left: 3px solid #ccc;
  color: #555;
}
.msg pre {
  margin: .3em 0;
  padding: .5em .7em;
  background: #f6f6f7;
  border: 1px solid #e3e5e8;
  border-radius: .35rem;
  overflow-x: auto;
}
.msg pre code { background: none; padding: 0; }
.msg code {
  background: #f1f2f4;
  border-radius: .25rem;
  padding: 0 .3em;
  font-size: .92em;
}
.msg .rt-list { margin: .2em 0; padding-left: 1.6em; }

footer {
  margin-top: 2rem;
  text-align: center;
  color: #999;
  font-size: .85rem;
}
/* 取得エラーを記録している場合のフッタ表示を強調する */
#retrieved-at.retrieve-error {
  display: block;
  margin-top: .4rem;
  color: #c0392b;
  font-weight: bold;
}

/* 公開サンプル用の最小スタイル(外部 CSS に依存しない) */
.container { max-width: 960px; margin: 0 auto; padding: 0 1rem; }
.text-danger { color: #c0392b; }