/* ========== ベース設定 ========== */
body {
  background-color: #f7f7f7;
  color: #333;
  font-family: "メイリオ", Meiryo, "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

/* ========== スレッド本体 ========== */
.thread-container {
  width: 95%;
  max-width: 800px;
  margin: 20px auto;
  padding: 15px 20px;
  background-color: #fff;
  border: 1px solid #ddd;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.05);
}

.thread-title {
  font-size: 1.3em;
  font-weight: bold;
  color: #444;
  border-bottom: 2px solid #666;
  padding-bottom: 6px;
  margin-bottom: 15px;
}

/* ========== レス部分 ========== */
.res {
  padding: 8px 10px;
  margin-bottom: 5px;
  border-left: 3px solid #ccc;
}

.res-info {
  font-weight: bold;
  color: #333;
}

.res-info span {
  font-weight: normal;
  color: #666;
  margin-left: 10px;
  font-size: 0.9em;
}

.res-content {
  margin-top: 4px;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ========== 区切り線 & 小ノート ========== */
.hr-separator {
  border: none;
  border-top: 1px dashed #aaa;
  margin: 20px 0;
}

.small-note {
  font-size: 0.8em;
  color: #888;
  text-align: center;
  margin-top: 25px;
}

/* ========== ページナビ ========== */
.page-nav {
  text-align: center;
  margin: 30px 0;
}

.page-nav a {
  display: inline-block;
  margin: 0 5px;
  padding: 6px 12px;
  border: 1px solid #ccc;
  color: #444;
  text-decoration: none;
  background-color: #fafafa;
  border-radius: 3px;
  transition: all 0.2s ease;
}

.page-nav a:hover {
  background-color: #eee;
}

.page-nav .next {
  font-weight: bold;
}

/* ========== 広告・固定バナー ========== */
@media (min-width: 1200px) {
  .ad-left,
  .ad-right {
    position: fixed;
    top: 40px;
    width: 160px;
    z-index: 9999;
  }

  .ad-left {
    left: 0;
    transform: translateX(-5px);
  }

  .ad-right {
    right: 0;
    transform: translateX(5px);
  }

  .wrapper {
    max-width: 1000px;
    margin: 0 auto;
  }

  .ad-bottom {
    margin-right: 180px;
  }
}

/* 下広告 */
.ad-bottom {
  text-align: center;
  margin: 20px auto;
}

/* 中央広告（PC / スマホ共通） */
.ad-mid {
  text-align: center;
  margin: 25px auto;
  padding: 10px;
  background-color: #fff9f9;
  border: 1px solid #ffdddd;
  border-radius: 4px;
}

.ad-mid > div {
  font-size: 0.8em;
  color: #cc0000;
  font-weight: bold;
  margin-top: 5px;
}

/* 広告画像全対応 */
.ad-bottom img,
.ad-mid img {
  display: block;
  max-width: 100%;
  width: 100%;
  height: auto;
  margin: 20px auto;
}

/* 固定バナー画像 */
.ad-left img,
.ad-right img {
  width: 100%;
  max-width: 180px;
  height: auto;
}

/* ========== モバイル最適化 ========== */
@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .thread-container {
    width: 100%;
    margin: 0;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .page-nav a {
    padding: 8px 10px;
    font-size: 0.9em;
  }
}