interactive family tree javascript

<h1>Family Tree</h1>
    
    <div class="tree-container">
        <div class="tree" id="familyTree"></div>
    </div>

    <div class="info-panel" id="infoPanel">
        <button class="close-btn" onclick="closeInfo()">×</button>
        <h3 id="infoName"></h3>
        <p id="infoDetails"></p>
    </div>

   * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 40px 20px;
            color: #fff;
        }

        h1 {
            margin-bottom: 40px;
            font-size: 2.5em;
            background: linear-gradient(135deg, #FE5A1D 0%, #ff8a5c 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .tree-container {
            position: relative;
            display: flex;
            justify-content: center;
        }

        .tree {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 60px;
        }

        .generation {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }

        .member {
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: center;
            cursor: pointer;
            transition: transform 0.3s ease;
        }

        .member:hover {
            transform: translateY(-5px);
        }

        .member-card {
            background: linear-gradient(135deg, #FE5A1D 0%, #ff7a3d 100%);
            border-radius: 15px;
            padding: 20px;
            min-width: 180px;
            text-align: center;
            box-shadow: 0 8px 20px rgba(254, 90, 29, 0.3);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .member-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s ease;
        }

        .member:hover .member-card::before {
            left: 100%;
        }

        .member:hover .member-card {
            box-shadow: 0 12px 30px rgba(254, 90, 29, 0.5);
        }

        .avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: linear-gradient(135deg, #fff 0%, #f0f0f0 100%);
            margin: 0 auto 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2em;
            color: #FE5A1D;
            font-weight: bold;
            border: 3px solid rgba(255, 255, 255, 0.3);
        }

        .name {
            font-size: 1.1em;
            font-weight: bold;
            margin-bottom: 5px;
        }

        .role {
            font-size: 0.85em;
            opacity: 0.9;
        }

        .connector {
            position: absolute;
            background: linear-gradient(135deg, #FE5A1D 0%, #ff8a5c 100%);
            z-index: -1;
        }

        .vertical-line {
            width: 3px;
            height: 40px;
            top: -40px;
            left: 50%;
            transform: translateX(-50%);
        }

        .horizontal-line {
            height: 3px;
            top: -40px;
        }

        .info-panel {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: rgba(254, 90, 29, 0.95);
            border-radius: 15px;
            padding: 20px;
            max-width: 300px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
            transform: translateX(400px);
            transition: transform 0.3s ease;
        }

        .info-panel.active {
            transform: translateX(0);
        }

        .info-panel h3 {
            margin-bottom: 10px;
            font-size: 1.3em;
        }

        .info-panel p {
            font-size: 0.9em;
            line-height: 1.6;
            opacity: 0.95;
        }

        .close-btn {
            position: absolute;
            top: 10px;
            right: 10px;
            background: rgba(255, 255, 255, 0.2);
            border: none;
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 1.2em;
            transition: background 0.3s ease;
        }

        .close-btn:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 1.8em;
            }

            .generation {
                gap: 20px;
            }

            .member-card {
                min-width: 140px;
                padding: 15px;
            }

            .avatar {
                width: 60px;
                height: 60px;
                font-size: 1.5em;
            }

            .info-panel {
                bottom: 10px;
                right: 10px;
                left: 10px;
                max-width: none;
            }
        }

const familyData = {
            name: "Robert Smith",
            role: "Grandfather",
            born: "1945",
            details: "Retired teacher, loves gardening and classical music.",
            children: [
                {
                    name: "Michael Smith",
                    role: "Father",
                    born: "1970",
                    details: "Software engineer with 20 years of experience.",
                    children: [
                        {
                            name: "Sarah Smith",
                            role: "Daughter",
                            born: "1998",
                            details: "Medical student passionate about pediatrics."
                        },
                        {
                            name: "James Smith",
                            role: "Son",
                            born: "2000",
                            details: "Computer science major, loves game development."
                        }
                    ]
                },
                {
                    name: "Jennifer Smith",
                    role: "Aunt",
                    born: "1972",
                    details: "Architect and interior designer.",
                    children: [
                        {
                            name: "Emma Johnson",
                            role: "Cousin",
                            born: "2002",
                            details: "Art student specializing in digital media."
                        }
                    ]
                }
            ]
        };

        function getInitials(name) {
            return name.split(' ').map(n => n[0]).join('');
        }

        function createMember(person, level) {
            const member = document.createElement('div');
            member.className = 'member';
            
            const card = document.createElement('div');
            card.className = 'member-card';
            
            const avatar = document.createElement('div');
            avatar.className = 'avatar';
            avatar.textContent = getInitials(person.name);
            
            const name = document.createElement('div');
            name.className = 'name';
            name.textContent = person.name;
            
            const role = document.createElement('div');
            role.className = 'role';
            role.textContent = person.role;
            
            card.appendChild(avatar);
            card.appendChild(name);
            card.appendChild(role);
            member.appendChild(card);
            
            if (level > 0) {
                const line = document.createElement('div');
                line.className = 'connector vertical-line';
                member.appendChild(line);
            }
            
            member.addEventListener('click', () => showInfo(person));
            
            return member;
        }

        function buildTree(data, container, level = 0) {
            const generation = document.createElement('div');
            generation.className = 'generation';
            
            const member = createMember(data, level);
            generation.appendChild(member);
            container.appendChild(generation);
            
            if (data.children && data.children.length > 0) {
                const childGeneration = document.createElement('div');
                childGeneration.className = 'generation';
                
                data.children.forEach(child => {
                    const childMember = createMember(child, level + 1);
                    childGeneration.appendChild(childMember);
                    
                    if (child.children && child.children.length > 0) {
                        const subTree = document.createElement('div');
                        subTree.className = 'tree';
                        child.children.forEach(grandchild => {
                            const grandchildGen = document.createElement('div');
                            grandchildGen.className = 'generation';
                            const grandchildMember = createMember(grandchild, level + 2);
                            grandchildGen.appendChild(grandchildMember);
                            subTree.appendChild(grandchildGen);
                        });
                        container.appendChild(subTree);
                    }
                });
                
                container.appendChild(childGeneration);
            }
        }

        function showInfo(person) {
            const panel = document.getElementById('infoPanel');
            const nameEl = document.getElementById('infoName');
            const detailsEl = document.getElementById('infoDetails');
            
            nameEl.textContent = person.name;
            detailsEl.innerHTML = `
                <strong>Role:</strong> ${person.role}<br>
                <strong>Born:</strong> ${person.born}<br><br>
                ${person.details}
            `;
            
            panel.classList.add('active');
        }

        function closeInfo() {
            document.getElementById('infoPanel').classList.remove('active');
        }

        const treeContainer = document.getElementById('familyTree');
        buildTree(familyData, treeContainer);