: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;
            --ipv4-color: #6f42c1;
            --ipv6-color: #e83e8c;
            --binary-color: #20c997;
        }
          .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);
        }
        .ip-input {
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
        }
        .binary-result {
            padding: 12px;
            background-color: white;
            border-radius: 4px;
            border: 1px solid #eee;
            font-size: 1rem;
            font-family: 'Courier New', monospace;
            margin: 10px 0;
            overflow-x: auto;
            white-space: nowrap;
        }
        .hex-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;
        }
        .ipv6-box {
            background-color: rgba(232, 62, 140, 0.05);
            border-left: 3px solid var(--ipv6-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            }
        .address-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-visualization {
            margin: 1.5rem 0;
            padding: 1rem;
            background-color: rgba(32, 201, 151, 0.05);
            border-radius: 6px;
            border: 1px solid rgba(32, 201, 151, 0.2);
        }
        .binary-segment {
            display: inline-block;
            margin: 0 2px;
            padding: 4px 8px;
            background-color: rgba(32, 201, 151, 0.1);
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
        }
        .binary-header {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--binary-color);
        }
        .address-type-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 0.5rem;
        }
        .global-unicast {
            background-color: rgba(40, 167, 69, 0.15);
            color: #28a745;
        }
        .unique-local {
            background-color: rgba(255, 193, 7, 0.15);
            color: #ffc107;
        }
        .link-local {
            background-color: rgba(0, 123, 255, 0.15);
            color: #007bff;
        }
        .multicast {
            background-color: rgba(220, 53, 69, 0.15);
            color: #dc3545;
        }
        .unspecified {
            background-color: rgba(108, 117, 125, 0.15);
            color: #6c757d;
        }
        .loopback {
            background-color: rgba(111, 66, 193, 0.15);
            color: #6f42c1;
        }
        .address-detail {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .detail-label {
            font-weight: 600;
            color: var(--text-muted);
            width: 160px;
            display: inline-block;
        }
        .detail-value {
            font-family: 'Courier New', monospace;
        }
        .hex-groups {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 1rem 0;
            justify-content: center;
        }
        .hex-group {
            padding: 8px 12px;
            background-color: rgba(232, 62, 140, 0.1);
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-weight: 600;
            text-align: center;
            min-width: 60px;
        }
        .hex-group-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .binary-bits {
            display: flex;
            flex-wrap: wrap;
            gap: 4px;
            margin: 1rem 0;
        }
        .bit {
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: white;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
        }
        .bit-1 {
            background-color: rgba(32, 201, 151, 0.2);
            border-color: rgba(32, 201, 151, 0.3);
        }
        .bit-header {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 4px;
        }