class File {
  constructor(name) { this.name = name; }
  showDetails(indent = "") { console.log(`${indent}📄 파일: ${this.name}`); }
}

class Folder {
  constructor(name) {
    this.name = name;
    this.components = [];
  }
  add(component) { this.components.push(component); }
  showDetails(indent = "") {
    console.log(`${indent}📁 폴더: ${this.name}`);
    for (const c of this.components) c.showDetails(indent + "  ");
  }
}

const root = new Folder("root");
const docs = new Folder("docs");
docs.add(new File("resume.pdf"));
root.add(docs);
root.add(new File("config.txt"));
root.showDetails();