:root{--bg: #f2f2f7;--card: #ffffff;--line: #e5e5ea;--text: #1c1c1e;--muted: #8e8e93;--accent: #0a84ff}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.app{max-width:480px;margin:0 auto;min-height:100%;background:var(--bg)}.topbar{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:#f2f2f7e6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:10}.brand{font-weight:700;font-size:18px}.back{background:none;border:none;color:var(--accent);font-size:16px;padding:0}.topbar-right{position:relative}.menu-btn{background:none;border:none;font-size:20px;color:var(--text);padding:0 4px}.menu{position:absolute;right:0;top:28px;background:var(--card);border:1px solid var(--line);border-radius:10px;box-shadow:0 6px 20px #00000026;overflow:hidden}.menu button{display:block;width:100%;padding:10px 18px;background:none;border:none;border-bottom:1px solid var(--line);text-align:left;color:var(--text);font-size:15px;white-space:nowrap}.menu button:last-child{border-bottom:none}.menu button.danger{color:#ff3b30}.screen{padding:12px 16px 96px}.node-header{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin-bottom:16px;display:flex;flex-direction:column;gap:8px;align-items:flex-start}.title-input{font-size:22px;font-weight:700;border:none;outline:none;width:100%;background:none;color:var(--text)}.note-input{border:none;outline:none;resize:vertical;min-height:38px;width:100%;font-size:15px;color:var(--text);background:none;font-family:inherit}.node-actions{display:flex;gap:12px}.link-btn{background:none;border:none;color:var(--accent);font-size:14px;padding:0}.empty{color:var(--muted);text-align:center;margin:40px 0;font-size:15px}.rows{list-style:none;margin:0;padding:0;background:var(--card);border-radius:14px;overflow:hidden;border:1px solid var(--line)}.row{display:flex;align-items:center;gap:10px;padding:12px 14px;border-bottom:1px solid var(--line)}.row:last-child{border-bottom:none}.check{width:22px;height:22px;border-radius:50%;border:2px solid var(--muted);background:none;flex:none;padding:0}.check.checked{background:#34c759;border-color:#34c759;position:relative}.check.checked:after{content:"✓";color:#fff;font-size:13px;position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center}.tag{font-size:10px;letter-spacing:.5px;text-transform:uppercase;color:#fff;padding:2px 6px;border-radius:5px;flex:none}.row-title{flex:1;text-align:left;background:none;border:none;font-size:16px;color:var(--text);padding:0}.row-title.done{color:var(--muted);text-decoration:line-through}.row-input{flex:1;font-size:16px;border:none;outline:none;background:none;color:var(--text);border-bottom:1px solid var(--accent)}.count{font-size:13px;color:var(--muted);flex:none}.chev{color:#c4c4c8;font-size:20px;flex:none}.del{background:none;border:none;color:#c4c4c8;font-size:14px;flex:none;padding:0 2px}.add-bar{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:480px;display:flex;gap:8px;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:#f2f2f7f2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--line);flex-wrap:wrap}.add-btn{flex:1 1 auto;min-width:90px;background:var(--accent);color:#fff;border:none;border-radius:10px;padding:10px 12px;font-size:15px;font-weight:600}.tree-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:20;display:flex;flex-direction:column;background:var(--bg);padding-bottom:env(safe-area-inset-bottom)}.tree-empty{color:var(--muted);text-align:center;margin:60px 24px;font-size:15px}.tree-scroll{flex:1;overflow:auto;-webkit-overflow-scrolling:touch;padding:8px}.tree-svg{display:block}.tree-edge{fill:none;stroke:#c4c4c8;stroke-width:1.5}.tree-box{filter:drop-shadow(0 1px 2px rgba(0,0,0,.18));pointer-events:none}.tree-type{fill:#ffffffd9;font-size:8px;letter-spacing:.5px;text-transform:uppercase;pointer-events:none}.tree-title{fill:#fff;font-size:12px;font-weight:600;pointer-events:none}.tree-title.done{fill:#ffffffb3;text-decoration:line-through}.tree-zoom{position:absolute;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));display:flex;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:4px;box-shadow:0 4px 16px #00000026}.tree-zoom button{background:none;border:none;color:var(--accent);font-size:16px;font-weight:600;min-width:36px;padding:6px 8px;border-radius:8px}.tree-zoom button:active{background:var(--bg)}