:root{--primary:#2563eb;--primary-dark:#1d4ed8;--bg-gradient:linear-gradient(135deg, #0f172a 0%, #1e293b 100%);--card-bg:#ffffff0d;--border-color:#ffffff1a;--text-main:#f8fafc;--text-muted:#94a3b8;--header-bg:#1e40af}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-gradient);color:var(--text-main);min-height:100vh;padding:2rem;font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5}.container{max-width:1000px;margin:0 auto}h1{background:linear-gradient(90deg,#60a5fa,#a855f7);-webkit-text-fill-color:transparent;text-align:center;-webkit-background-clip:text;margin-bottom:2rem;font-size:2.5rem;font-weight:800}.tree-card{background:var(--card-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:1rem;margin-bottom:2rem;padding:2rem;transition:transform .2s;box-shadow:0 10px 25px -5px #0000004d}.tree-card:hover{transform:translateY(-4px)}.export-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:.5rem;align-items:center;gap:.5rem;margin-top:1rem;padding:.75rem 1.5rem;font-weight:600;transition:all .2s;display:flex}.export-btn:hover{background:var(--primary-dark);box-shadow:0 0 15px #2563eb66}.json-output{color:#10b981;white-space:pre-wrap;background:#0000004d;border:1px solid #10b98133;border-radius:.5rem;margin-top:1rem;padding:1rem;font-family:Fira Code,monospace;font-size:.875rem}.tag-container{border-left:1px solid #ffffff1a;margin-top:.5rem;margin-left:1.5rem;padding-left:1rem}.tag-header{background:var(--header-bg);border-radius:4px;align-items:center;gap:8px;margin-bottom:4px;padding:4px 8px;display:flex}.tag-name{cursor:pointer;flex-grow:1;font-weight:600}.tag-name-input{color:#fff;font-family:inherit;font-size:inherit;background:0 0;border:1px solid #fff;border-radius:2px;width:100%;padding:2px 4px}.tag-btn{color:#fff;cursor:pointer;background:0 0;border:none;border-radius:2px;justify-content:center;align-items:center;padding:2px;display:flex}.tag-btn:hover{background:#fff3}.data-input{border:1px solid var(--border-color);color:#fff;background:#ffffff0d;border-radius:4px;width:100%;margin-top:4px;padding:4px 8px}.add-child-btn{color:#fff;cursor:pointer;background:#059669;border:none;border-radius:4px;padding:2px 8px;font-size:.75rem}.add-child-btn:hover{background:#047857}