Untitled

<body>
    <div class="mainContainer">
        <div class="mainSubContainer" id="main">
            <div class="graphContainer">
                <div class="graphHeader">Temperatur</div>
                <div class="graphElement"><canvas id="canvas1"></canvas></div>
            </div>
            <div class="graphContainer">
                <div class="graphHeader">relative Luftfeuchte</div>
                <div class="graphElement"><canvas id="canvas2"></canvas></div>
            </div>
        </div>
    </div>
</body>