/*************************************
 * 全体コンテナ
 *************************************/
.image-converter-container {
    max-width: 900px;
    margin: 40px auto;
    padding: 40px;
    background-color: #ffffff;
    text-align: center;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    color: #333;
}

/*************************************
 * 見出し・サブテキスト
 *************************************/
.icm-heading {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #2c3e50;
    letter-spacing: -0.02em;
}
.icm-subtext {
    font-size: 1rem;
    color: #888;
    margin-bottom: 30px;
}

/*************************************
 * 変換先形式選択
 *************************************/
.icm-format-row {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
}
.icm-format-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: #444;
    width: 120px;
}
.icm-format-select {
    padding: 8px 16px;
    font-size: 0.95rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    background-color: #f9f9f9;
    cursor: pointer;
    transition: border-color 0.2s;
}
.icm-format-select:focus {
    border-color: #46757E;
    outline: none;
}

/*************************************
 * ドラッグ＆ドロップエリア
 *************************************/
.icm-drag-drop-area {
    background-color: #fcfcfc;
    border: 2px dashed #d0d7de;
    border-radius: 12px;
    padding: 60px 40px;
    margin-bottom: 30px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.icm-drag-drop-area p {
    margin: 0 0 15px 0;
    font-size: 1.1rem;
    color: #555;
}
.icm-drag-drop-area small {
    display: block;
    margin-top: 8px;
    color: #aaa;
}
.icm-drag-drop-area.dragover {
    background-color: #f0f7f8;
    border-color: #46757E;
    transform: scale(1.01);
}

.icm-file-select-btn {
    background-color: #46757E;
    color: #fff;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: background-color 0.2s, transform 0.1s;
}
.icm-file-select-btn:hover {
    background-color: #385d65;
}
.icm-file-select-btn:active {
    transform: scale(0.98);
}

/*************************************
 * プレビューエリア (横スクロール)
 *************************************/
.icm-preview-list {
    display: flex;
    flex-wrap: nowrap;
    gap: 20px;
    overflow-x: auto;
    padding: 10px 5px 25px;
    margin-bottom: 30px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

/* スクロールバーのカスタマイズ */
.icm-preview-list::-webkit-scrollbar {
    height: 6px;
}
.icm-preview-list::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}
.icm-preview-list::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 10px;
}
.icm-preview-list::-webkit-scrollbar-thumb:hover {
    background: #46757E;
}

.icm-preview-card {
    flex: 0 0 180px;
    background-color: #fff;
    border: 1px solid #f0f0f0;
    border-radius: 12px;
    text-align: center;
    padding: 15px;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}
.icm-preview-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.icm-preview-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 12px;
    background-color: #eee;
}

.icm-preview-filename {
    font-size: 0.8rem;
    color: #333;
    margin-bottom: 10px;
    word-break: break-all;
    font-weight: 500;
    height: 2.4em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/*************************************
 * 軽量化ステータス (Stats)
 *************************************/
.icm-stats {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 15px;
}
.icm-size-info {
    font-size: 0.75rem;
    color: #777;
}
.icm-size-info strong {
    color: #333;
}
.icm-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #fff;
}
.reduction-positive { background-color: #27ae60; }
.reduction-neutral { background-color: #95a5a6; }

/*************************************
 * 個別保存ボタン
 *************************************/
.icm-download-btn {
    display: block;
    background-color: #46757E;
    color: #fff;
    text-decoration: none;
    padding: 8px 0;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: opacity 0.2s, color 0.2s;
}

.icm-download-btn:hover {
    opacity: 0.9;
    color: #FFFFFF; /* ホバー時の文字色を指定 */
}

/*************************************
 * ZIP一括ダウンロードボタン
 *************************************/
.icm-zip-row {
    margin-top: 10px;
}
.icm-download-all-btn {
    background-color: #46757E;
    color: #fff;
    border: none;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(70, 117, 126, 0.2);
}
.icm-download-all-btn:hover {
    background-color: #385d65;
    color: #FFFFFF;
    box-shadow: 0 6px 20px rgba(70, 117, 126, 0.3);
    transform: translateY(-2px);
}

/*************************************
 * メッセージ表示
 *************************************/
.icm-message {
    display: none;
    margin-top: 25px;
    font-weight: 500;
}

/*************************************
 * 使い方ガイド (Usage Guide)
 *************************************/
.icm-usage-guide {
    margin-top: 40px;
    padding: 25px;
    background-color: #f8fafa; 
    border-left: 4px solid #46757E; 
    border-radius: 8px;
    text-align: left;
}

.icm-guide-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #385d65; 
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.icm-guide-list {
    list-style: disc;
    padding-left: 20px;
    margin: 0;
}

.icm-guide-list li {
    font-size: 0.95rem;
    line-height: 1.8;
    color: #444;
    margin-bottom: 8px;
}

/* リンク・強調テキストのアクセントカラー */
.icm-text-highlight {
    color: #b35a38; 
    font-weight: 600;
    text-decoration: underline;
    transition: opacity 0.2s;
}

.icm-text-highlight:hover {
    opacity: 0.7;
    text-decoration: none;
}

/*************************************
 * スマホ対応の微調整
 *************************************/
@media (max-width: 600px) {
    .image-converter-container {
        padding: 20px;
        margin: 10px;
    }
    .icm-drag-drop-area {
        padding: 40px 20px;
    }
    .icm-usage-guide {
        padding: 20px 15px;
    }
    .icm-guide-list li {
        font-size: 0.85rem;
    }
}