/* extracted from public/tools/preview.html — DO NOT EDIT */
* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --page-bg: var(--color-bg);
            --surface: var(--color-surface);
            --border: rgba(15, 23, 42, 0.1);
            --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.12);
            --text-main: var(--color-fg);
            --text-sub: var(--color-fg-muted);
            --accent: #22c55e;
            --accent-strong: var(--color-fg);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --gap-lg: 2rem;
            --gap-md: 1.5rem;
            --gap-sm: 0.75rem;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            background: var(--page-bg);
            min-height: 100vh;
            color: var(--text-main);
            visibility: visible;
        }


        /* 导航栏 */
        /* navbar 和 nav-container 的核心样式已移至 style-shared.css */
 .v2-legacy-mount .navbar {
            z-index: 100;
        } .v2-legacy-mount .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-fg);
            text-decoration: none;
            letter-spacing: -0.025em;
        } .v2-legacy-mount .nav-links {
            display: flex;
            gap: 2rem;
            list-style: none;
        } .v2-legacy-mount .nav-links a {
            color: var(--color-fg-muted);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.2s ease;
            padding: 0.5rem 1rem;
            border-radius: 12px;
            position: relative;
        } .v2-legacy-mount .nav-links a:hover,
 .v2-legacy-mount .nav-links a.active {
            color: var(--color-fg);
            background: rgba(15, 23, 42, 0.1);
        }

        /* 语言切换器样式 */
        .language-switcher {
            display: flex;
            align-items: center;
            margin-left: 1rem;
        }

        .lang-toggle {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .lang-label {
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-fg-muted);
            cursor: pointer;
            transition: all 0.2s ease;
            user-select: none;
        }

        .lang-label.active {
            color: var(--color-fg);
            font-weight: 600;
        }

        .toggle-switch {
            position: relative;
            width: 44px;
            height: 24px;
            background: var(--color-border);
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .toggle-switch.active {
            background: var(--color-fg);
        }

        .toggle-slider {
            position: absolute;
            top: 2px;
            left: 2px;
            width: 20px;
            height: 20px;
            background: var(--color-surface);
            border-radius: 50%;
            transition: all 0.3s ease;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .toggle-switch.active .toggle-slider {
            transform: translateX(20px);
        }

        /* 主容器 */
 .v2-legacy-mount .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
            display: grid;
            grid-template-columns: 1fr 350px;
            gap: 2rem;
            min-height: calc(100vh - 80px);
        }

        /* 主预览区域 */
        .preview-area {
            background: var(--color-surface);
            border-radius: 24px;
            padding: 2rem;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(15, 23, 42, 0.1);
        }

        .preview-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid rgba(15, 23, 42, 0.1);
        }

        .preview-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-fg);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .file-info {
            font-size: 0.9rem;
            color: var(--color-fg-muted);
            background: var(--color-bg);
            padding: 0.5rem 1rem;
            border-radius: 8px;
            border: 1px solid rgba(15, 23, 42, 0.1);
            font-weight: 500;
        }

        /* 上传区域 */
        .upload-section {
            text-align: center;
            padding: 4rem 2rem;
            border: 2px dashed rgba(34, 197, 94, 0.3);
            border-radius: 16px;
            margin-bottom: 2rem;
            transition: all 0.3s ease;
            background: linear-gradient(135deg, rgba(34, 197, 94, 0.03), rgba(16, 185, 129, 0.03));
        }

        .upload-section:hover {
            border-color: #22c55e;
            background: var(--color-surface);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(34, 197, 94, 0.15);
        }

        .upload-section.dragover {
            border-color: #22c55e;
            background: rgba(34, 197, 94, 0.05);
            transform: scale(1.02);
            box-shadow: 0 8px 25px rgba(34, 197, 94, 0.2);
        }

        .upload-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 3.5rem;
            height: 3.5rem;
            border-radius: 14px;
            background: var(--color-bg);
            color: var(--color-fg);
            margin-bottom: 1rem;
        }

        .upload-text {
            font-size: 1.2rem;
            color: var(--color-fg);
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .upload-hint {
            font-size: 0.9rem;
            color: var(--color-fg-muted);
            margin-bottom: 2rem;
        }

        .upload-btn {
            background: var(--color-primary);
            color: var(--color-primary-fg);
            border: none;
            padding: 1rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 16px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .upload-btn:hover {
            background: linear-gradient(135deg, var(--color-fg) 0%, var(--color-fg-muted) 100%);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(15, 23, 42, 0.3);
        }

        .upload-btn:active {
            transform: translateY(0);
        }

        /* 预览容器 */
        .preview-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }

        .bg-panel {
            width: 100%;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1rem;
            box-shadow: var(--shadow-soft);
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .bg-panel-header {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .bg-panel-title {
            font-weight: 700;
            color: var(--text-main);
            font-size: 1rem;
        }

        .bg-panel-subtitle {
            color: var(--text-sub);
            font-size: 0.85rem;
        }

        .bg-presets {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .bg-chip {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 1px solid var(--border);
            background: var(--color-bg);
            color: var(--text-main);
            padding: 0.5rem 0.75rem;
            border-radius: 999px;
            cursor: pointer;
            transition: all 0.2s ease;
            font-weight: 600;
        }

        .bg-chip:hover {
            border-color: rgba(34, 197, 94, 0.4);
            box-shadow: 0 6px 18px rgba(34, 197, 94, 0.12);
            transform: translateY(-1px);
        }

        .bg-chip.active {
            border-color: rgba(34, 197, 94, 0.6);
            background: rgba(34, 197, 94, 0.08);
            color: #166534;
        }

        .bg-swatch {
            width: 20px;
            height: 20px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--swatch, var(--color-surface));
            position: relative;
        }

        .bg-swatch.grid {
            background-color: var(--color-bg);
            background-image:
                linear-gradient(45deg, rgba(0,0,0,0.06) 25%, transparent 25%, transparent 75%, rgba(0,0,0,0.06) 75%, rgba(0,0,0,0.06)),
                linear-gradient(45deg, rgba(0,0,0,0.06) 25%, transparent 25%, transparent 75%, rgba(0,0,0,0.06) 75%, rgba(0,0,0,0.06));
            background-position: 0 0, 8px 8px;
            background-size: 16px 16px;
        }

        .bg-custom {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        .bg-custom label {
            font-weight: 600;
            color: var(--text-main);
        }

        .bg-custom-inputs {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .bg-custom input[type="color"] {
            width: 44px;
            height: 36px;
            padding: 0;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: var(--color-surface);
            cursor: pointer;
        }

        .bg-custom input[type="text"] {
            padding: 0.6rem 0.75rem;
            border-radius: 10px;
            border: 1px solid var(--border);
            min-width: 140px;
            font-weight: 600;
            color: var(--text-main);
        }

        .bg-custom input[type="text"]:focus {
            outline: 2px solid rgba(34, 197, 94, 0.3);
            border-color: rgba(34, 197, 94, 0.6);
        }

        .preview-wrapper {
            position: relative;
            max-width: 100%;
            background: var(--color-surface);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            border: 1px solid rgba(15, 23, 42, 0.1);
        }

        #lottie-container {
            width: 500px;
            height: 500px;
            background: var(--color-surface);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        #lottie-container.bg-grid {
            background-color: var(--color-bg);
            background-image:
                linear-gradient(45deg, rgba(0,0,0,0.05) 25%, transparent 25%, transparent 75%, rgba(0,0,0,0.05) 75%, rgba(0,0,0,0.05)),
                linear-gradient(45deg, rgba(0,0,0,0.05) 25%, transparent 25%, transparent 75%, rgba(0,0,0,0.05) 75%, rgba(0,0,0,0.05));
            background-position: 0 0, 12px 12px;
            background-size: 24px 24px;
        }

        /* 控制面板 */
        .controls {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
            justify-content: center;
            background: var(--color-surface);
            padding: 1.5rem;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(15, 23, 42, 0.1);
        }

        .control-group {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .control-btn {
            background: var(--color-surface);
            border: 1px solid rgba(15, 23, 42, 0.2);
            padding: 0.75rem 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 600;
            color: var(--color-fg);
            border-radius: 12px;
        }

        .control-btn:hover {
            background: var(--color-bg);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(15, 23, 42, 0.2);
        }

        .control-btn:active {
            transform: translateY(0);
        }

        .control-btn.active {
            background: var(--color-fg);
            color: var(--color-surface);
        }

        .control-btn.active:hover {
            background: var(--color-fg);
        }

        .control-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            background: var(--color-bg);
            color: var(--color-fg-muted);
            border-color: var(--color-border);
        }

        /* 侧边栏 */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .sidebar-section {
            background: var(--color-surface);
            border-radius: 20px;
            padding: 1.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(15, 23, 42, 0.1);
        }

        .sidebar-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-fg);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-content {
            color: var(--color-fg-muted);
            font-size: 0.9rem;
            line-height: 1.5;
        }

        .size-controls {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .size-control {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .size-control label {
            font-weight: 600;
            color: var(--color-fg);
            min-width: 60px;
            font-size: 0.9rem;
        }

        .size-control input[type="range"] {
            flex: 1;
            appearance: none;
            height: 8px;
            background: var(--color-bg);
            border-radius: 4px;
            outline: none;
            border: 1px solid rgba(15, 23, 42, 0.1);
        }

        .size-control input[type="range"]::-webkit-slider-thumb {
            appearance: none;
            width: 20px;
            height: 20px;
            background: var(--color-fg);
            border-radius: 50%;
            cursor: pointer;
        }

        .size-control input[type="range"]::-moz-range-thumb {
            width: 20px;
            height: 20px;
            background: var(--color-fg);
            border-radius: 50%;
            cursor: pointer;
            border: none;
        }

        .size-display {
            font-weight: 600;
            color: var(--color-fg);
            min-width: 60px;
            text-align: right;
            font-family: 'Monaco', 'Consolas', monospace;
        }

        /* 文件列表 */
        .file-list {
            max-height: 300px;
            overflow-y: auto;
        }

        .file-item {
            padding: 0.75rem;
            margin-bottom: 0.5rem;
            background: var(--color-bg);
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
            border: 1px solid rgba(15, 23, 42, 0.1);
        }

        .file-item:hover {
            background: var(--color-bg);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(15, 23, 42, 0.1);
        }

        .file-item.active {
            background: var(--color-fg);
            color: var(--color-surface);
        }

        .file-name {
            font-weight: 600;
            margin-bottom: 0.25rem;
            font-size: 0.85rem;
        }

        .file-size {
            color: var(--color-fg-muted);
            font-size: 0.75rem;
        }

        .file-item.active .file-size {
            color: #d1d5db;
        }

        /* 跨工具操作 */
        .next-actions {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .next-actions .next-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            width: 100%;
            padding: 0.7rem 1rem;
            border-radius: 12px;
            font-size: 0.9rem;
            font-weight: 600;
            border: 1px solid rgba(15, 23, 42, 0.1);
            background: var(--color-bg);
            color: var(--color-fg);
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .next-actions .next-btn:hover {
            background: var(--color-bg);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
        }
        .next-actions .next-btn.primary {
            background: var(--color-fg);
            color: var(--color-surface);
            border-color: var(--color-fg);
        }
        .next-actions .next-btn.primary:hover {
            background: var(--color-fg);
        }
        .next-actions .next-btn[hidden] { display: none !important; }
        .next-actions .next-hint {
            font-size: 0.78rem;
            color: var(--color-fg-muted);
            margin-top: 0.25rem;
            line-height: 1.4;
        }

        /* 提示框 */
        .tip-box {
            background: rgba(34, 197, 94, 0.08);
            border-radius: 16px;
            border-left: 4px solid #22c55e;
            padding: 1rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 4px 15px rgba(34, 197, 94, 0.1);
        }

        .tip-title {
            font-weight: 700;
            color: var(--color-fg);
            margin-bottom: 0.5rem;
        }

        .tip-content {
            color: #166534;
            font-size: 0.9rem;
        }

        /* 加载动画 */
 .v2-legacy-mount .loading {
            display: none;
            text-align: center;
            padding: 2rem;
            color: var(--color-fg-muted);
        }

        .spinner {
            width: 40px;
            height: 40px;
            border: 4px solid var(--color-bg);
            border-top: 4px solid var(--color-fg);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 1rem;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        } .v2-legacy-mount .hidden {
            display: none !important;
        }

        /* 响应式设计 */
        @media (max-width: 1200px) { .v2-legacy-mount .container {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .sidebar {
                flex-direction: row;
                overflow-x: auto;
            }

            .sidebar-section {
                min-width: 300px;
            }
        }

        @media (max-width: 768px) { .v2-legacy-mount .container {
                padding: 1rem;
            }

            .preview-area {
                padding: 1rem;
            }

            #lottie-container {
                width: 100%;
                max-width: 400px;
                height: 400px;
            }

            .controls {
                padding: 1rem;
            }

            .control-btn {
                padding: 0.5rem 0.75rem;
                font-size: 0.9rem;
            } .v2-legacy-mount .nav-links {
                display: none;
            }

            .sidebar {
                flex-direction: column;
            }

            .sidebar-section {
                min-width: auto;
            }
        }

        @media (max-width: 480px) {
            .preview-title {
                font-size: 1.3rem;
            }

            .upload-section {
                padding: 2rem 1rem;
            }

            #lottie-container {
                height: 300px;
            }
        }