.tree-margin-left-15{margin-left:15px}.tree-child-component{margin:3px 10px;cursor:pointer}.tree-parent-component>span:nth-of-type(1){border:1px solid #ddd;margin:2px 5px;width:15px;display:inline-block;text-align:center;cursor:pointer}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:20px}.app-header{text-align:center;color:#fff;padding:40px 20px;margin-bottom:40px}.app-header h1{font-size:3rem;margin:0 0 10px;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.2)}.app-header .subtitle{font-size:1.2rem;margin:0;opacity:.9}.demo-section{background:#fff;border-radius:12px;padding:30px;margin-bottom:30px;box-shadow:0 10px 30px #0003;transition:transform .3s ease,box-shadow .3s ease}.demo-section:hover{transform:translateY(-5px);box-shadow:0 15px 40px #0000004d}.demo-section h2{color:#667eea;margin-top:0;margin-bottom:10px;font-size:1.8rem;font-weight:600}.demo-section .description{color:#666;margin-bottom:20px;font-size:1rem;line-height:1.6}.tree-sample{background:#f8f9fa;border-radius:8px;padding:20px;border:1px solid #e9ecef}.controls{margin-bottom:20px;display:flex;gap:10px;flex-wrap:wrap}.controls button,.tree-sample>button{background:#667eea;color:#fff;border:none;padding:10px 20px;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:all .3s ease;box-shadow:0 2px 5px #667eea4d}.controls button:hover,.tree-sample>button:hover{background:#5568d3;transform:translateY(-2px);box-shadow:0 4px 8px #667eea66}.controls button:active,.tree-sample>button:active{transform:translateY(0)}.code-block{background:#282c34;color:#abb2bf;padding:20px;border-radius:8px;overflow-x:auto;margin-top:20px;font-size:14px;line-height:1.6;box-shadow:inset 0 2px 10px #0000004d}.code-block code{font-family:Courier New,Courier,monospace}.custom-child{padding:8px 12px;background:#e3f2fd;border-left:3px solid #2196f3;margin:5px 0;border-radius:4px;cursor:pointer;transition:all .2s ease}.custom-child:hover{background:#bbdefb;transform:translate(5px)}.custom-parent{padding:8px 12px;background:#fff3e0;border-left:3px solid #ff9800;margin:5px 0;border-radius:4px;cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .2s ease}.custom-parent:hover{background:#ffe0b2}.custom-open-icon{color:#ff9800;font-weight:700;min-width:20px}.custom-child-2{padding:8px 12px;background:#f3e5f5;border-left:3px solid #9c27b0;margin:5px 0;border-radius:4px;cursor:pointer;transition:all .2s ease}.custom-child-2:hover{background:#e1bee7;transform:translate(5px)}.custom-parent-2{padding:8px 12px;background:#e8f5e9;border-left:3px solid #4caf50;margin:5px 0;border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;transition:all .2s ease}.custom-parent-2:hover{background:#c8e6c9}.custom-open-icon-2{color:#4caf50;font-weight:700}.font-22{font-size:22px}.app-footer{text-align:center;color:#fff;padding:40px 20px;margin-top:40px}.app-footer p{margin:10px 0;font-size:1rem}.app-footer a{color:#fff;text-decoration:none;font-weight:500;border-bottom:2px solid transparent;transition:border-color .3s ease}.app-footer a:hover{border-bottom-color:#fff}@media (max-width: 768px){.app-header h1{font-size:2rem}.app-header .subtitle{font-size:1rem}.demo-section{padding:20px}.demo-section h2{font-size:1.5rem}.controls{flex-direction:column}.controls button,.tree-sample>button{width:100%}}