:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --sort-color: #6f42c1;
            --process-color: #e83e8c;
        }
        .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden; color: var(--text-color);
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb-item.active {
            color: var(--text-color);
        }
        .textarea-wrapper {
            position: relative;
        }
        .text-counter {
            position: absolute;
            bottom: 10px;
            right: 15px;
            background-color: rgba(255, 255, 255, 0.8);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .text-counter.lines {
            right: 80px;
        }
        #inputText {
            font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
            min-height: 300px;
            resize: vertical;
        }
        #outputText {
            font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
            min-height: 300px;
            resize: vertical;
            background-color: var(--light-gray);
        }
        .btn-outline-primary {
            font-weight: 600;
            border-radius: 6px;
            padding: 0.75rem 1.5rem;
        }
        .btn-group .btn {
            border-radius: 4px;
        }
        .textarea-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0.75rem;
        }
        .sort-type-container {
            display: flex;
            align-items: center;
        }
        .sort-type-label {
            margin-right: 0.5rem;
            font-weight: 600;
            color: var(--text-muted);
            white-space: nowrap;
            font-size: 0.9rem;
        }
        .sort-type-select {
            width: 270px;
        }
        .options-card {
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            border: 1px solid var(--border-color);
        }
        .option-group {
            margin-bottom: 1.5rem;
        }
        .option-title {
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
            font-size: 1rem;
        }
        .form-check {
            margin-bottom: 0.5rem;
        }
        .form-check-input:checked {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .form-check-label {
            cursor: pointer;
        }
        .quick-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        .action-btn.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        .stats-container {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin: 1.5rem 0;
            padding: 1rem;
            background-color: rgba(44, 125, 160, 0.05);
            border-radius: 8px;
        }
        .stat-item {
            text-align: center;
            flex: 1;
            min-width: 120px;
        }
        .stat-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.25rem;
        }
        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .example-lists {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin: 1rem 0;
        }
        .example-list-btn {
            background-color: rgba(44, 125, 160, 0.1);
            border: 1px solid rgba(44, 125, 160, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
            font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
        }
        .example-list-btn:hover {
            background-color: rgba(44, 125, 160, 0.2);
            transform: translateY(-2px);
        }
        .sort-box {
            background-color: rgba(111, 66, 193, 0.05);
            border-left: 3px solid var(--sort-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            .stats-container {
                flex-direction: column;
                gap: 1rem;
            }
            .stat-item {
                min-width: 100%;
            }
            .textarea-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .sort-type-container {
                margin-top: 0.5rem;
                width: 100%;
            }
            .sort-type-select {
                width: 100%;
            }
        }
        .sort-type-badge {
            display: inline-block;
            padding: 0.25rem 0.5rem;
            background-color: rgba(111, 66, 193, 0.1);
            color: var(--sort-color);
            border-radius: 4px;
            font-size: 0.85rem;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .processing-indicator {
            display: none;
            text-align: center;
            padding: 1rem;
            color: var(--text-muted);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .comparison-table th, .comparison-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .comparison-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        .comparison-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        .sorting-example {
            display: flex;
            margin: 1.5rem 0;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
        }
        .example-column {
            flex: 1;
            padding: 1rem;
        }
        .example-column.original {
            background-color: rgba(0,0,0,0.02);
            border-right: 1px solid var(--border-color);
        }
        .example-column.sorted {
            background-color: rgba(44, 125, 160, 0.05);
        }
        .example-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .example-list {
            font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
            font-size: 0.9rem;
            line-height: 1.5;
        }
        .example-list div {
            padding: 0.25rem 0;
        }
        .checkbox-container {
            display: flex;
            align-items: center;
            margin-bottom: 0.5rem;
            cursor: pointer;
        }
        .checkbox-container input[type="checkbox"] {
            margin-right: 0.5rem;
            cursor: pointer;
        }