class DataMonitor extends HTMLElement {
    constructor() {
        super();
        this.attachShadow({ mode: 'open' });
    }

    connectedCallback() {
        this.render();
    }

    render() {
        this.shadowRoot.innerHTML = `
            <style>
                :host {
                    display: block;
                    height: 100%;
                    overflow: auto;
                    padding: 16px;
                    box-sizing: border-box;
                }

                .monitor-container {
                    background-color: white;
                    border-radius: 8px;
                    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
                    padding: 16px;
                    height: 100%;
                    box-sizing: border-box;
                }

                .monitor-header {
                    display: flex;
                    justify-content: space-between;
                    align-items: center;
                    margin-bottom: 20px;
                    padding-bottom: 10px;
                    border-bottom: 1px solid #e0e0e0;
                }

                .monitor-title {
                    font-size: 18px;
                    font-weight: bold;
                    color: #333;
                }
            </style>
            <div class="monitor-container">
                <div class="monitor-header">
                    <div class="monitor-title">数据监控</div>
                </div>
                <div>数据监控组件内容（待实现）</div>
            </div>
        `;
    }
}

customElements.define('data-monitor', DataMonitor);