Ensure the html and body elements take full height html,body{height:100%;width:100%;margin:0;padding:0;overflow:hidden}#root{height:100%;width:100%}.app{display:flex;flex-direction:column;height:100vh}.header{display:flex;justify-content:space-between;padding:10px;background-color:#f0f0f0}.main-content{display:flex;flex-grow:1}.sidebar-container{display:grid;grid-template-columns:250px 1fr}.sidebar{background-color:#fff;border-right:1px solid #ddd;overflow-y:auto;display:flex;flex-direction:column}.tabs{display:flex;flex-direction:column}.tab{padding:15px;cursor:pointer}.tab.active{background-color:#e0e0e0}.tab-content{padding:10px;background-color:#f9f9f9;width:200px}.upload-button{padding:10px 15px;background-color:#007bff;color:#fff;border:none;cursor:pointer}.canvas-area{flex-grow:1;background-color:#cac6c6;display:flex;align-items:center;justify-content:center}#canvas{background-color:#e8e8e8}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}