.convert-section {
            background: var(--surface-1);
            border-radius: var(--rounded-xl);
            border: 1px solid var(--hairline);
            padding: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
            box-shadow: var(--shadow-sm);
        }

        .convert-section h2 {
            color: var(--ink);
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: var(--spacing-lg);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .upload-area {
            border: 2px dashed var(--hairline);
            border-radius: var(--rounded-lg);
            padding: var(--spacing-xl) var(--spacing-lg);
            text-align: center;
            cursor: pointer;
            transition: var(--transition-fast);
            background: var(--surface-2);
        }

        .upload-area:hover, .upload-area.dragover {
            border-color: var(--primary);
            background: rgba(204, 120, 92, 0.05);
        }

        .upload-icon {
            font-size: 32px;
            margin-bottom: var(--spacing-sm);
        }

        .upload-text {
            color: var(--ink);
            font-size: 0.9rem;
            margin-bottom: var(--spacing-xs);
            font-weight: 600;
        }

        .upload-hint {
            color: var(--ink-subtle);
            font-size: 0.8rem;
        }

        .audio-preview-container {
            margin-top: var(--spacing-md);
            padding: var(--spacing-md);
            background: var(--surface-2);
            border: 1px solid var(--hairline);
            border-radius: var(--rounded-md);
        }

        .audio-preview-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: var(--spacing-sm);
        }

        .audio-preview-filename {
            font-size: 0.85rem;
            color: var(--ink);
            font-weight: 600;
        }

        .audio-preview-remove {
            padding: 5px 10px;
            background: transparent;
            color: var(--semantic-error);
            border: 1px solid var(--semantic-error);
            border-radius: var(--rounded-sm);
            font-size: 0.8rem;
            cursor: pointer;
            transition: var(--transition-fast);
        }

        .audio-preview-remove:hover {
            background: var(--semantic-error);
            color: #fff;
        }

        .file-info {
            display: flex;
            gap: 12px;
            align-items: center;
            margin-bottom: var(--spacing-sm);
            font-size: 0.8rem;
            color: var(--ink-subtle);
            flex-wrap: wrap;
        }

        .file-info span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 8px;
            background: var(--surface-1);
            border-radius: var(--rounded-sm);
            border: 1px solid var(--hairline);
        }

        .voice-select-section {
            margin-top: var(--spacing-lg);
            padding: var(--spacing-lg);
            background: var(--surface-2);
            border-radius: var(--rounded-lg);
            border: 1px solid var(--hairline);
        }

        .voice-select-section .section-header {
            margin-bottom: var(--spacing-md);
            padding-bottom: var(--spacing-sm);
            border-bottom: 1px solid var(--hairline);
        }

        .voice-select-section .section-header h2 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .voice-select-section .options-grid {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .voice-select-section .option-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .voice-select-section .option-group.inline {
            flex-direction: row;
            align-items: center;
            gap: var(--spacing-sm);
        }

        .voice-select-section .option-group label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--ink);
            white-space: nowrap;
            min-width: 36px;
        }

        .voice-select-section .option-group select,
        .voice-select-section .option-group .fuzzy-dropdown {
            flex: 1;
            min-width: 0;
        }

        .voice-select-section .option-group select {
            padding: 8px 12px;
            border: 1px solid var(--hairline);
            border-radius: var(--rounded-md);
            font-size: 0.85rem;
            background: var(--surface-1);
            color: var(--ink);
            cursor: pointer;
            transition: var(--transition-fast);
            width: 100%;
        }

        .voice-select-section .option-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(204, 120, 92, 0.12);
        }

        .voice-select-inline {
            display: flex;
            gap: 8px;
            align-items: center;
            flex: 1;
            min-width: 0;
        }

        .voice-select-inline .fuzzy-dropdown {
            flex: 1;
            min-width: 0;
        }

        .voice-select-inline select {
            flex: 1;
        }

        .btn-preview {
            padding: 8px 14px;
            background: var(--surface-1);
            color: var(--primary);
            border: 1px solid var(--primary);
            border-radius: var(--rounded-md);
            font-size: 0.8rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-fast);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .btn-preview:hover {
            background: var(--primary);
            color: #fff;
        }

        .convert-actions {
            display: flex;
            gap: var(--spacing-md);
            justify-content: flex-start;
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-lg);
            border-top: 1px solid var(--hairline);
        }

        .btn-convert {
            min-height: 36px;
            padding: 8px 20px;
            border: none;
            border-radius: var(--rounded-md);
            font-size: 0.85rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-fast);
        }

        .btn-primary-convert {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .btn-primary-convert:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
            background: var(--primary-hover);
        }

        .btn-primary-convert:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .btn-secondary-convert {
            background: var(--surface-2);
            color: var(--ink);
            border: 1px solid var(--hairline);
        }

        .btn-secondary-convert:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .convert-result {
            display: none;
            margin-top: var(--spacing-lg);
            padding: var(--spacing-lg);
            background: rgba(204, 120, 92, 0.06);
            border: 1px solid rgba(204, 120, 92, 0.2);
            border-radius: var(--rounded-md);
        }

        .convert-result.active {
            display: block;
        }

        .result-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: var(--spacing-md);
            color: var(--primary);
        }

        .result-audio {
            width: 100%;
            margin-bottom: var(--spacing-md);
            border-radius: var(--rounded-sm);
        }

        .result-download {
            display: inline-block;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            text-decoration: none;
            border-radius: var(--rounded-md);
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition-fast);
        }

        .result-download:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .convert-notice {
            background: rgba(204, 120, 92, 0.08);
            border: 1px solid rgba(204, 120, 92, 0.2);
            border-radius: var(--rounded-md);
            padding: var(--spacing-md);
            margin-bottom: var(--spacing-lg);
        }

        .notice-item {
            font-size: 0.88rem;
            color: var(--ink-subtle);
            line-height: 1.6;
            padding: 4px 0;
        }

        .notice-item strong {
            color: var(--primary);
        }

        .custom-alert-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            justify-content: center;
            align-items: center;
            z-index: 10000;
            animation: fadeIn 0.2s ease;
        }

        .custom-alert-overlay.active {
            display: flex;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .custom-alert {
            background: var(--surface-1);
            border-radius: var(--rounded-xl);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            padding: var(--spacing-xl);
            min-width: 320px;
            max-width: 400px;
            text-align: center;
            animation: slideUp 0.3s ease;
            border: 1px solid var(--hairline);
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .custom-alert-icon {
            font-size: 48px;
            margin-bottom: var(--spacing-md);
        }

        .custom-alert-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: var(--spacing-sm);
        }

        .custom-alert-message {
            font-size: 0.95rem;
            color: var(--ink-subtle);
            line-height: 1.6;
            margin-bottom: var(--spacing-xl);
        }

        .custom-alert-btn {
            min-height: 40px;
            padding: 10px 32px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--rounded-md);
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-fast);
        }

        .custom-alert-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(204, 120, 92, 0.24);
        }

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

        @media (max-width: 768px) {
            .convert-actions {
                flex-direction: column;
            }

            .btn-convert {
                width: 100%;
            }
        }