:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --network-color: #4d7c0f;
            --binary-color: #7c3aed;
            --ipv4-color: #2c7da0;
            --ipv6-color: #e83e8c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
        }
        .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);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        .binary-input {
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
        }
        .textarea-batch {
            font-family: 'Courier New', monospace;
            min-height: 150px;
        }
        .binary-result {
            padding: 12px;
            background-color: white;
            border-radius: 4px;
            border: 1px solid #eee;
            font-size: 1.1rem;
            font-family: 'Courier New', monospace;
            margin: 10px 0;
            text-align: center;
        }
        .binary-equation {
            font-size: 1.3rem;
            padding: 15px;
            background-color: rgba(124, 58, 237, 0.05);
            border-left: 4px solid var(--binary-color);
            border-radius: 4px;
            margin: 15px 0;
        }
        .binary-visualization {
            position: relative;
            margin: 2rem 0;
        }
        .binary-grid {
            display: grid;
            grid-template-columns: repeat(32, 1fr);
            gap: 2px;
            margin: 1rem 0;
            overflow-x: auto;
        }
        .binary-grid-ipv6 {
            grid-template-columns: repeat(128, 1fr);
        }
        .binary-cell {
            height: 25px;
            min-width: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid #ddd;
            font-family: 'Courier New', monospace;
            font-weight: 600;
            font-size: 0.8rem;
            background-color: white;
        }
        .binary-cell.one {
            background-color: rgba(124, 58, 237, 0.2);
            color: var(--binary-color);
        }
        .binary-cell.zero {
            background-color: rgba(108, 117, 125, 0.1);
            color: var(--text-muted);
        }
        .octet-separator {
            position: absolute;
            top: 0;
            height: 100%;
            width: 2px;
            background-color: var(--danger-color);
        }
        .network-box {
            background-color: rgba(77, 124, 15, 0.05);
            border-left: 3px solid var(--network-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            .binary-grid {
                grid-template-columns: repeat(16, 1fr);
            }
            .binary-grid-ipv6 {
                grid-template-columns: repeat(64, 1fr);
            }
        }
        .binary-examples {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .example-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: 'Courier New', monospace;
        }
        .example-btn:hover {
            background-color: rgba(44, 125, 160, 0.2);
            transform: translateY(-2px);
        }
        .binary-notation {
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
        }
        .calculation-step {
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .ip-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .ip-table th, .ip-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .ip-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        .ip-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        .ip-octet {
            display: inline-block;
            padding: 0.5rem;
            margin: 0 0.25rem;
            background-color: rgba(124, 58, 237, 0.1);
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-weight: 600;
        }
        .binary-octet {
            display: inline-block;
            padding: 0.5rem;
            margin: 0 0.25rem;
            background-color: rgba(44, 125, 160, 0.1);
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-weight: 600;
        }
        .class-indicator {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-weight: 600;
            margin-left: 0.5rem;
        }
        .class-a {
            background-color: rgba(40, 167, 69, 0.2);
            color: var(--success-color);
        }
        .class-b {
            background-color: rgba(255, 193, 7, 0.2);
            color: var(--warning-color);
        }
        .class-c {
            background-color: rgba(0, 123, 255, 0.2);
            color: #007bff;
        }
        .class-d {
            background-color: rgba(124, 58, 237, 0.2);
            color: var(--binary-color);
        }
        .class-e {
            background-color: rgba(220, 53, 69, 0.2);
            color: var(--danger-color);
        }
        .copy-btn {
            background-color: rgba(44, 125, 160, 0.1);
            border: 1px solid rgba(44, 125, 160, 0.2);
            border-radius: 4px;
            padding: 0.25rem 0.5rem;
            font-size: 0.8rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
            margin-left: 0.5rem;
        }
        .copy-btn:hover {
            background-color: rgba(44, 125, 160, 0.2);
        }
        .binary-breakdown {
            display: flex;
            justify-content: space-between;
            margin: 1rem 0;
        }
        .octet-breakdown {
            text-align: center;
            flex: 1;
        }
        .octet-value {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .octet-binary {
            font-family: 'Courier New', monospace;
            font-size: 1rem;
            margin-top: 0.5rem;
        }
        .network-info-card {
            border-left: 4px solid var(--network-color);
            padding: 1rem;
            margin-bottom: 1rem;
            background-color: white;
            border-radius: 0 4px 4px 0;word-break: break-all;
        }
        .network-info-title {
            font-weight: 600;
            color: var(--network-color);
            margin-bottom: 0.5rem;
        }
        .network-info-value {
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
            font-weight: 600;
        }
        .address-type {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-weight: 600;
            margin-left: 0.5rem;
        }
        .public-address {
            background-color: rgba(40, 167, 69, 0.2);
            color: var(--success-color);
        }
        .private-address {
            background-color: rgba(255, 193, 7, 0.2);
            color: var(--warning-color);
        }
        .toggle-switch {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }
        .toggle-label {
            margin-right: 1rem;
            font-weight: 600;
        }
        .switch {
            position: relative;
            display: inline-block;
            width: 60px;
            height: 30px;
        }
        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
        }
        .slider:before {
            position: absolute;
            content: "";
            height: 22px;
            width: 22px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
        }
        input:checked + .slider {
            background-color: var(--primary-color);
        }
        input:checked + .slider:before {
            transform: translateX(30px);
        }
        .slider.round {
            border-radius: 34px;
        }
        .slider.round:before {
            border-radius: 50%;
        }
        .ip-version-selector {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .ip-version-btn {
            flex: 1;
            padding: 0.75rem;
            border: 2px solid var(--border-color);
            border-radius: 6px;
            background-color: white;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        .ip-version-btn.active {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.1);
            color: var(--primary-color);
        }
        .ipv4-btn.active {
            border-color: var(--ipv4-color);
            background-color: rgba(44, 125, 160, 0.1);
            color: var(--ipv4-color);
        }
        .ipv6-btn.active {
            border-color: var(--ipv6-color);
            background-color: rgba(232, 62, 140, 0.1);
            color: var(--ipv6-color);
        }
        .batch-container {
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
        }
        .batch-results {
            max-height: 500px;
            overflow-y: auto;
            margin-top: 1rem;
        }
        .batch-result-item {
            background-color: white;
            border-radius: 6px;
            border: 1px solid var(--border-color);
            padding: 1rem;
            margin-bottom: 0.75rem;
        }
        .batch-result-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0.5rem;
        }
        .batch-binary {
            font-family: 'Courier New', monospace;
            font-weight: 600;
            font-size: 1.1rem;
        }
        .batch-ip {
            font-family: 'Courier New', monospace;
            word-break: break-all;
            background-color: var(--light-gray);
            padding: 0.5rem;
            border-radius: 4px;
            margin-top: 0.5rem;
        }
        .batch-stats {
            display: flex;
            justify-content: space-between;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px dashed var(--border-color);
        }
        .mode-selector {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .mode-btn {
            flex: 1;
            padding: 0.75rem;
            border: 2px solid var(--border-color);
            border-radius: 6px;
            background-color: white;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        .mode-btn.active {
            border-color: var(--primary-color);
            background-color: rgba(44, 125, 160, 0.1);
            color: var(--primary-color);
        }
        .ipv6-hextet {
            display: inline-block;
            padding: 0.5rem;
            margin: 0 0.25rem;
            background-color: rgba(232, 62, 140, 0.1);
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-weight: 600;
        }
        .ipv6-binary-chunk {
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            margin: 0 0.1rem;
        }
        .ipv6-compressed {
            color: var(--ipv6-color);
            font-weight: 600;
        }
        .tool-version {
            position: absolute;
            top: 1rem;
            right: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            background-color: rgba(255,255,255,0.8);
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
        }
        .report-issue {
            text-align: center;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border-color);
        }
        .binary-format-selector {
            display: flex;
            gap: 0.5rem;
            margin-top: 0.5rem;
        }
        .format-btn {
            padding: 0.5rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            background-color: white;
            cursor: pointer;
            transition: all 0.2s;
        }
        .format-btn.active {
            background-color: rgba(44, 125, 160, 0.1);
            border-color: var(--primary-color);
            color: var(--primary-color);
        }
        .validation-status {
            display: flex;
            align-items: center;
            margin-top: 0.5rem;
        }
        .validation-icon {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 0.5rem;
        }
        .validation-valid {
            background-color: rgba(40, 167, 69, 0.2);
            color: var(--success-color);
        }
        .validation-invalid {
            background-color: rgba(220, 53, 69, 0.2);
            color: var(--danger-color);
        }
        .auto-detect-chip {
            display: inline-block;
            background-color: rgba(255, 193, 7, 0.2);
            color: var(--warning-color);
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-left: 0.5rem;
        }