/* ==============================================
   読了率プログレスバー
   ============================================== */
#reading-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(0, 0, 0, 0.08);
    z-index: 2000;           /* ヘッダーより前面に */
}

#reading-progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #0073aa 0%, #00a6ff 100%);
    transition: width 0.1s linear;
}

/* ==============================================
   ★追加：タイトル＋URLコピー用ボタン
   ============================================== */
#copy-share-container {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #0073aa;
    color: #fff;
    padding: 10px 18px;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    display: none;           /* JavaScript で表示切替 */
    z-index: 2500;
}

#copy-share-container button {
    background: none;
    border: none;
    color: inherit;
    font-size: 14px;
    cursor: pointer;
}

#copy-share-container button:focus {
    outline: none;
}