:root {
            --bg-main: #f8f6f2;
            --panel-bg: #ffffff;
            --text-dark: #1e1e1e;
            --text-muted: #8c867e;
            --border-color: #e5e0d8;
            --accent-tan: #bba58d;
            --soft-green: #7da08d;
            --soft-red: #c98a8a;
            --radius-main: 16px;
            --shadow-subtle: 0 10px 30px rgba(27, 24, 20, 0.04);
            --transition-smooth: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
        }

        * { box-sizing: border-box; }

        body {
            background-color: var(--bg-main);
            color: var(--text-dark);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
            margin: 0;
            padding: 60px 20px;
            min-height: 100vh;
            letter-spacing: 0.05em;
        }

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

        /* ── Header ─────────────────────────────── */
        header {
            text-align: center;
            margin-bottom: 50px;
            position: relative;
        }
        header h1 {
            margin: 0;
            font-size: 28px;
            font-weight: 300;
            letter-spacing: 6px;
            text-transform: uppercase;
        }
        header p {
            margin: 12px 0 0;
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 4px;
            text-transform: uppercase;
        }
        .header-actions {
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .btn-ghost {
            background: none;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 7px 16px;
            font-size: 12px;
            cursor: pointer;
            color: var(--text-muted);
            letter-spacing: 1px;
            transition: var(--transition-smooth);
        }
        .btn-ghost:hover { border-color: var(--accent-tan); color: var(--accent-tan); }

        /* ── Panels ─────────────────────────────── */
        .panel {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-main);
            padding: 35px;
            box-shadow: var(--shadow-subtle);
            margin-bottom: 35px;
        }

        /* ── Alerts ─────────────────────────────── */
        .alert {
            padding: 16px 20px;
            border-radius: 10px;
            margin-bottom: 25px;
            font-size: 14px;
            display: none;
            line-height: 1.6;
            animation: fadeIn 0.4s ease;
        }
        .alert-danger  { background: #fdf5f5; border: 1px solid var(--soft-red);   color: #9c5858; }
        .alert-success { background: #f5fdf9; border: 1px solid var(--soft-green); color: #4e735f; }
        .alert-warn    { background: #fdfbf5; border: 1px solid var(--accent-tan); color: #7a6147; }

        /* ── Textarea / Inputs ──────────────────── */
        textarea {
            width: 100%;
            height: 130px;
            background-color: #faf9f6;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            color: var(--text-dark);
            padding: 20px;
            font-size: 15px;
            line-height: 1.7;
            resize: none;
            transition: var(--transition-smooth);
        }
        textarea:focus { background: #fff; border-color: var(--accent-tan); outline: none; box-shadow: 0 0 0 4px rgba(187,165,141,.08); }
        textarea::placeholder { color: #cbc4b9; }

        /* ── Buttons ────────────────────────────── */
        .btn-container { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; }
        .btn {
            background-color: var(--text-dark);
            color: #fff;
            border: none;
            padding: 14px 36px;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 2px;
            border-radius: 10px;
            cursor: pointer;
            transition: var(--transition-smooth);
        }
        .btn:hover { background-color: #3a3a3a; transform: translateY(-1px); box-shadow: 0 4px 15px rgba(0,0,0,.05); }
        .btn:active { transform: translateY(0); }
        .btn-disabled { background-color: #e5e0d8 !important; color: #b5aeaa; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
        .btn-success { background-color: var(--accent-tan); }
        .btn-success:hover { background-color: #a89279; }

        .glow-text { color: var(--accent-tan); font-size: 13px; display: none; animation: pulse 2s infinite; letter-spacing: 1px; }

        /* ── Global Image Zone ──────────────────── */
        .global-image-zone {
            border: 1.5px dashed var(--border-color);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
            color: var(--text-muted);
            font-size: 12px;
            letter-spacing: 1px;
        }
        .global-image-zone:hover { border-color: var(--accent-tan); }

        /* ── Cards Grid ─────────────────────────── */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
            gap: 25px;
            margin-top: 25px;
        }
        .product-card {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-main);
            padding: 22px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition-smooth);
            position: relative;
        }
        .product-card:hover { border-color: var(--accent-tan); transform: translateY(-3px); box-shadow: 0 15px 35px rgba(27,24,20,.06); }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #f5f2eb;
            padding-bottom: 12px;
            margin-bottom: 14px;
        }
        .card-badge {
            font-size: 11px;
            background: #f4efea;
            color: var(--text-muted);
            padding: 4px 12px;
            border-radius: 6px;
            font-weight: 500;
            max-width: 130px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .card-delete-btn {
            background: none;
            border: 1px solid #eed8d8;
            border-radius: 6px;
            width: 26px;
            height: 26px;
            cursor: pointer;
            font-size: 14px;
            color: var(--soft-red);
            line-height: 1;
            transition: var(--transition-smooth);
            flex-shrink: 0;
        }
        .card-delete-btn:hover { background: #fdf5f5; }

        /* ── Per-card Image Zone ────────────────── */
        .card-img-zone {
            border: 1.5px dashed var(--border-color);
            border-radius: 10px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: all 0.3s;
            position: relative;
        }
        .card-img-placeholder {
            padding: 14px;
            text-align: center;
            font-size: 11px;
            color: #cbc4b9;
            letter-spacing: 1px;
            cursor: pointer;
        }
        .card-img-placeholder:hover { color: var(--accent-tan); }
        .card-img-thumb-wrap {
            display: none;
            position: relative;
        }
        /* 單圖：等比例顯示，不裁切 */
        .card-img-thumb-wrap.single img.card-main-img {
            width: 100%;
            max-height: 180px;
            object-fit: contain;
            background: #f8f6f2;
            display: block;
        }
        /* 多圖：縮圖格 */
        .card-img-thumb-wrap.multi .card-thumb-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 3px;
            padding: 3px;
            background: #f8f6f2;
        }
        .card-img-thumb-wrap.multi .card-thumb-grid img {
            width: 100%;
            aspect-ratio: 1 / 1;
            object-fit: contain;
            background: #fff;
            border-radius: 3px;
        }
        .card-img-count {
            font-size: 10px;
            color: var(--text-muted);
            text-align: right;
            padding: 2px 8px 4px;
            background: #f8f6f2;
            letter-spacing: 1px;
        }
        .card-img-actions {
            display: flex;
            gap: 6px;
            padding: 6px 8px;
            background: #faf9f6;
            border-top: 1px solid var(--border-color);
        }
        .card-img-actions button {
            background: none;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-size: 10px;
            padding: 3px 10px;
            cursor: pointer;
            color: var(--text-muted);
            transition: all 0.2s;
        }
        .card-img-actions button:hover { border-color: var(--accent-tan); color: var(--accent-tan); }
        .card-img-processing {
            font-size: 10px;
            color: var(--text-muted);
            text-align: center;
            padding: 10px;
            display: none;
            animation: pulse 1.5s infinite;
        }

        /* ── Card Fields ────────────────────────── */
        .card-field { display: flex; align-items: center; margin-bottom: 12px; }
        .card-field label { width: 80px; font-size: 13px; color: var(--text-muted); font-weight: 400; flex-shrink: 0; }
        .card-field input {
            flex: 1;
            background: transparent;
            border: 1px solid transparent;
            color: var(--text-dark);
            font-size: 14px;
            padding: 6px 10px;
            border-radius: 6px;
            transition: var(--transition-smooth);
        }
        .card-field input:focus { background: #faf9f6; border-color: var(--border-color); outline: none; }
        .card-field input.p-title { font-weight: 600; font-size: 15px; }
        .p-spec { color: #4a7496; font-weight: 600; }
        .p-spec.spec-error { border-color: var(--soft-red) !important; background: #fdf5f5 !important; }
        .spec-warn-text { font-size: 11px; color: var(--soft-red); margin: -8px 0 10px 80px; display: none; }

        /* ── Add Card Button ────────────────────── */
        .add-card-btn {
            border: 1.5px dashed var(--border-color);
            border-radius: var(--radius-main);
            padding: 20px;
            text-align: center;
            cursor: pointer;
            color: var(--text-muted);
            font-size: 13px;
            letter-spacing: 2px;
            transition: all 0.3s;
            margin-top: 5px;
        }
        .add-card-btn:hover { border-color: var(--accent-tan); color: var(--accent-tan); }

        /* ── Login Card (main area) ─────────────── */
        #loginCard {
            position: fixed; top: 0; left: 200px; right: 0; bottom: 0;
            display: flex; align-items: center; justify-content: center;
            background: var(--bg-main); z-index: 100;
            animation: fadeIn 0.3s ease;
        }
        @media (max-width: 600px) { #loginCard { left: 0; } }
        .lc-box {
            background: var(--panel-bg); border: 1px solid var(--border-color);
            border-radius: var(--radius-main); padding: 48px 40px;
            max-width: 360px; width: 90%;
            box-shadow: 0 20px 60px rgba(27,24,20,.08); text-align: center;
        }
        .lc-brand { font-size: 18px; font-weight: 300; letter-spacing: 6px;
                    text-transform: uppercase; color: var(--accent-tan); margin: 0 0 6px; }
        .lc-sub   { font-size: 11px; color: var(--text-muted); letter-spacing: 3px;
                    text-transform: uppercase; margin: 0 0 30px; }
        .lc-input { width: 100%; padding: 12px 16px; background: #faf9f6;
                    border: 1px solid var(--border-color); border-radius: 10px; font-size: 14px;
                    outline: none; transition: all 0.3s ease; margin-bottom: 12px; display: block; }
        .lc-input:focus { border-color: var(--accent-tan); background: #fff; }
        .lc-btn { width: 100%; background: var(--text-dark); color: #fff; border: none;
                  padding: 13px; font-size: 13px; letter-spacing: 3px; border-radius: 10px;
                  cursor: pointer; transition: all 0.3s ease; }
        .lc-btn:hover { background: #3a3a3a; }
        .lc-error { font-size: 12px; color: var(--soft-red); margin-top: 12px; min-height: 18px; }

        @keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
        @keyframes pulse  { 0%, 100% { opacity: .5; } 50% { opacity: 1; } }

        /* ── Mobile ─────────────────────────────── */
        @media (max-width: 600px) {
            body { padding: 24px 14px; }

            /* Header：actions 移到標題下方，不再 absolute */
            header { margin-bottom: 28px; padding-bottom: 0; }
            header h1 { font-size: 20px; letter-spacing: 3px; }
            header p  { letter-spacing: 2px; margin-bottom: 10px; }
            .header-actions {
                position: static;
                transform: none;
                justify-content: center;
                margin-top: 12px;
            }

            /* Panel 壓縮 */
            .panel { padding: 18px 14px; margin-bottom: 20px; }

            /* Textarea */
            textarea { font-size: 14px; padding: 14px; height: 110px; }

            /* 分析按鈕列：垂直堆疊 */
            .btn-container {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
            }
            .btn { text-align: center; padding: 14px 20px; }
            .glow-text { text-align: center; font-size: 12px; }

            /* 全域圖片縮圖 */
            #globalThumbs img { max-height: 60px; }

            /* 結果區 header：垂直堆疊 */
            .result-header {
                flex-direction: column !important;
                align-items: flex-start !important;
                gap: 10px;
            }
            .result-header-right {
                width: 100%;
                display: flex;
                justify-content: space-between;
                align-items: center;
            }

            /* 批量修改面板：單欄 */
            .batch-fields-grid {
                grid-template-columns: 1fr !important;
            }

            /* 卡片：單欄 */
            .cards-grid { grid-template-columns: 1fr; gap: 14px; }
            .product-card { padding: 16px 14px; }
            .product-card:hover { transform: none; }

            /* 卡片欄位 label 縮短 */
            .card-field label { width: 62px; font-size: 12px; }
            .card-field input { font-size: 13px; }

            /* 上傳按鈕 full-width */
            .upload-btn-wrap { text-align: center !important; }
            #uploadBtn { width: 100%; }

            /* 新增卡片按鈕 */
            .add-card-btn { font-size: 12px; padding: 14px; }

        }