class IssuesBoard extends HTMLElement {
    connectedCallback() {
        this.attachShadow({ mode: 'open' });
        this.shadowRoot.innerHTML = `
            <style>
                .board {
                    display: flex;
                    gap: 1rem;
                    overflow-x: auto;
                    padding: 1rem 0;
                }
                
                .board-column {
                    min-width: 300px;
                    background: #f4f5f7;
                    border-radius: 3px;
                    padding: 0.5rem;
                }
                
                .column-header {
                    padding: 0.5rem;
                    font-weight: 600;
                    text-transform: uppercase;
                    font-size: 0.875rem;
                    color: #5e6c84;
                }
                
                .issue-card {
                    background: white;
                    border-radius: 3px;
                    box-shadow: 0 1px 0 rgba(9,30,66,.25);
                    padding: 0.5rem;
                    margin-bottom: 0.5rem;
                    cursor: pointer;
                }
                
                .issue-key {
                    font-size: 0.75rem;
                    color: #5e6c84;
                }
                
                .issue-summary {
                    font-size: 0.875rem;
                    margin: 0.25rem 0;
                }
                
                .issue-footer {
                    display: flex;
                    justify-content: space-between;
                    font-size: 0.75rem;
                    color: #5e6c84;
                }
            </style>
            
            <div class="board">
                <div class="board-column">
                    <div class="column-header">To Do</div>
                    <div class="issue-card">
                        <div class="issue-key">TEST-123</div>
                        <div class="issue-summary">Implement login page tests</div>
                        <div class="issue-footer">
                            <span>High</span>
                            <span>2d</span>
                        </div>
                    </div>
                </div>
                
                <div class="board-column">
                    <div class="column-header">In Progress</div>
                    <div class="issue-card">
                        <div class="issue-key">TEST-124</div>
                        <div class="issue-summary">API test automation</div>
                        <div class="issue-footer">
                            <span>Medium</span>
                            <span>1d</span>
                        </div>
                    </div>
                </div>
                
                <div class="board-column">
                    <div class="column-header">Done</div>
                    <div class="issue-card">
                        <div class="issue-key">TEST-122</div>
                        <div class="issue-summary">Checkout flow tests</div>
                        <div class="issue-footer">
                            <span>Low</span>
                            <span>✓</span>
                        </div>
                    </div>
                </div>
            </div>
        `;
    }
}

customElements.define('issues-board', IssuesBoard);