.App{text-align:center;padding:20px;background-color:#0b0c10;font-family:sans-serif;color:#c5c6c7}h1{font-size:2em;margin-bottom:20px;color:#545e5e}.popup{position:absolute;top:10px;right:10px;background-color:#fff;padding:10px;border:2px solid #007bff;border-radius:5px;display:flex;flex-direction:column;gap:5px;color:#007bff}.tree-node{display:flex;flex-direction:column;align-items:center;position:relative;margin:20px}.node-value{background-color:#fff;border:2px solid #28a745;border-radius:50%;width:40px;height:40px;display:flex;justify-content:center;align-items:center;font-size:20px;margin-bottom:10px;transition:background-color .2s;color:#28a745}.tree-node.selected .node-value{background-color:#66fcf1;color:#0b0c10}.node-value.highlighted{background-color:#45a29e;color:#0b0c10}.children{display:flex;justify-content:space-between;width:100%}.left-child,.right-child{display:flex;flex-direction:column;align-items:center;position:relative}.add-button{background-color:#28a745;border:none;color:#fff;text-align:center;font-size:20px;width:25px;height:25px;cursor:pointer;border-radius:50%;margin:5px}.traversal-controls{display:flex;gap:10px;margin-top:20px;justify-content:center}.traversal-controls select,.traversal-controls button{padding:10px 15px;font-size:16px;border-radius:5px;background-color:#007bff;color:#fff;border:none}.primary-button{display:inline-block;outline:0;border:0;cursor:pointer;background:#007bff;color:#fff;border-radius:5px;padding:10px 15px;font-size:16px;transition:transform .2s,background .2s}.primary-button:hover{transform:translateY(-2px);background:#0056b3}.secondary-button{display:inline-block;outline:0;border:0;cursor:pointer;border-radius:5px;padding:10px 15px;font-size:16px;transition:transform .2s,background .2s;background:#28a745;color:#fff}.secondary-button:hover{transform:translateY(-2px);background:#218838}.traversal-array{display:flex;gap:5px;margin-top:20px}.array-element{background-color:#fff;border:2px solid #007bff;padding:10px;border-radius:5px;color:#007bff}.tree-container{display:flex;flex-direction:column;align-items:center;overflow-x:auto;position:relative;background-color:#f8f8f2;font-family:Arial,sans-serif;width:100vw;height:100vh}.popup{position:absolute;top:10px;right:10px;background-color:#fff;padding:15px;border:2px solid #007bff;border-radius:8px;box-shadow:0 4px 8px #0000001a;display:flex;flex-direction:column;gap:10px;color:#007bff;transition:transform .3s ease,box-shadow .3s ease}.popup:hover{transform:translateY(-5px);box-shadow:0 6px 12px #00000026}.primary-button,.secondary-button{display:inline-block;outline:0;border:0;cursor:pointer;border-radius:8px;padding:12px 18px;font-size:16px;font-weight:700;transition:transform .2s,background .2s,box-shadow .2s}.primary-button{background-color:#007bff;color:#fff}.primary-button:hover{transform:translateY(-2px);background-color:#0056b3;box-shadow:0 4px 8px #005bbb4d}.secondary-button{background-color:#28a745;color:#fff}.secondary-button:hover{transform:translateY(-2px);background-color:#218838;box-shadow:0 4px 8px #28a7454d}body{margin:0;font-family:Arial,sans-serif;background-color:#faf3e0}#root{display:flex;justify-content:center;align-items:center;height:100vh}