body,h1,h2,h3,h4{margin:0;padding:0}.collapsible-header{display:flex;align-items:center;justify-content:space-between;cursor:pointer;margin-bottom:8px;border-bottom:1px solid #ccc;padding-bottom:4px;width:100%}.collapsible-title{margin:0;text-decoration:none;border-bottom:none;padding-bottom:0}.collapsible-button{background:none;border:1px solid #ccc;border-radius:3px;width:20px;height:20px;cursor:pointer;font-size:12px;display:flex;align-items:center;justify-content:center}.app{display:flex;flex-direction:column;height:100dvh;gap:20px;padding:20px;box-sizing:border-box}.main-content{display:flex;gap:20px;flex:1;min-height:0}.canvas-container{flex:1;border:1px solid black;min-width:0}.sidebar{width:300px;flex-shrink:0}.config{display:grid;gap:20px}.field{display:grid;grid-template-columns:1fr 80px;align-items:center;gap:8px 20px}.description{font-size:12px;color:#666;grid-column:1 / -1;padding-bottom:8px}.reset-button{margin-top:8px}.button-container{display:flex;gap:12px;margin-top:20px}.button-container button{flex:1;padding:10px 16px;border:1px solid #ccc;border-radius:4px;font-size:14px;cursor:pointer;transition:background-color .2s,border-color .2s}.button-container button:hover{background:#e8e8e8;border-color:#999}.button-container button:active{background:#d8d8d8}.footer{text-align:center;font-size:12px;color:#666}.footer a{color:#666;text-decoration:none}.footer a:hover{text-decoration:underline}