:root{--bg: #f6f7fb;--surface: #ffffff;--border: #e5e7eb;--text: #1f2937;--muted: #6b7280;--accent: #3b82f6;--danger: #ef4444;--shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04);--shadow-lg: 0 10px 25px rgba(0, 0, 0, .08)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Pretendard,Apple SD Gothic Neo,Noto Sans KR,sans-serif;background:var(--bg);color:var(--text);font-size:14px;-webkit-font-smoothing:antialiased}button{font:inherit;color:inherit;background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:4px 10px;cursor:pointer;transition:background .12s,border-color .12s,transform .05s}button:hover{background:#f3f4f6}button:active{transform:translateY(1px)}button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button.primary:hover{background:#2563eb}button.big{padding:12px 22px;font-size:16px}button.danger{border-color:#fecaca;color:var(--danger)}button.danger:hover{background:#fee2e2}.muted{color:var(--muted)}.small{font-size:12px}kbd{background:#fff;border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;padding:1px 5px;font-size:11px;font-family:SF Mono,Menlo,monospace;color:var(--muted)}.home{max-width:720px;margin:0 auto;padding:64px 24px 24px}.home-header h1{font-size:32px;margin:0 0 8px}.home-header p{margin:0 0 20px}.recent{margin-top:48px}.recent h2{font-size:16px;color:var(--muted);margin-bottom:12px;font-weight:500}.recent-list{list-style:none;padding:0;margin:0;display:grid;gap:8px}.recent-list a{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--surface);border:1px solid var(--border);border-radius:8px;text-decoration:none;color:var(--text);transition:border-color .15s,transform .05s}.recent-list a:hover{border-color:var(--accent);transform:translateY(-1px)}.home-footer{margin-top:64px;text-align:center}.app{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column}.topbar{flex:0 0 auto;display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--surface);border-bottom:1px solid var(--border);z-index:10}.home-link{font-size:20px;text-decoration:none;padding:0 4px}.title-input{border:none;background:transparent;font-size:15px;font-weight:500;padding:6px 8px;border-radius:4px;width:240px;color:var(--text)}.title-input:hover,.title-input:focus{background:#f3f4f6;outline:none}.status{font-size:12px;color:var(--muted);min-width:110px}.status-saving{color:var(--muted)}.status-saved{color:#059669}.status-error{color:var(--danger)}.spacer{flex:1}.hint-bar{flex:0 0 auto;display:flex;gap:14px;padding:6px 16px;background:var(--surface);border-top:1px solid var(--border);font-size:12px;color:var(--muted);flex-wrap:wrap}.mindmap-wrap{flex:1 1 auto;position:relative;overflow:hidden;background:radial-gradient(circle at 10% 10%,rgba(59,130,246,.05),transparent 40%),radial-gradient(circle at 90% 90%,rgba(249,115,22,.05),transparent 40%),var(--bg);-webkit-user-select:none;user-select:none}.mindmap-canvas{position:absolute;top:0;left:0;will-change:transform}.connections{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.node{position:absolute;border:2px solid var(--border);border-radius:10px;background:var(--surface);padding:8px 14px;box-shadow:var(--shadow);cursor:pointer;transition:box-shadow .12s,transform .05s;display:flex;flex-direction:column;overflow:visible}.node:hover{box-shadow:var(--shadow-lg)}.node.selected{box-shadow:0 0 0 3px #3b82f64d,var(--shadow-lg)}.node.dragging{opacity:.4;pointer-events:none}.node.drop-target{box-shadow:0 0 0 3px #10b98199,var(--shadow-lg)}.drag-ghost{position:fixed;pointer-events:none;z-index:1000;background:var(--surface);border:2px solid var(--accent);border-radius:8px;padding:4px 10px;font-size:13px;color:var(--text);box-shadow:var(--shadow-lg);max-width:240px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.node.root{font-weight:600;font-size:16px;border-radius:14px}.node-text{white-space:pre-wrap;word-break:break-word;line-height:1.4;flex:1;min-height:22px}.placeholder{color:#0000004d;font-style:italic}.node-image{position:relative;margin:-4px -8px 6px;border-radius:6px;overflow:hidden;background:#f3f4f6}.node-image img{display:block;width:100%;max-height:80px;object-fit:contain}.img-clear{position:absolute;top:2px;right:2px;width:22px;height:22px;padding:0;font-size:14px;border-radius:50%;background:#0009;color:#fff;border:none}.img-clear:hover{background:#000c}.node-editor{border:1px solid var(--accent);border-radius:4px;padding:4px 6px;resize:none;font:inherit;color:var(--text);background:#fff;caret-color:var(--text);outline:none;min-height:24px;overflow:hidden;white-space:pre-wrap;word-break:break-word;display:block;box-sizing:border-box}.node-editor::selection{background:#3b82f640;color:var(--text)}.node-editor-mirror{position:absolute;visibility:hidden;pointer-events:none;white-space:pre;font:inherit;letter-spacing:inherit;word-spacing:inherit;padding:4px 6px;border:1px solid transparent;left:-9999px;top:-9999px}.collapse-btn{position:absolute;top:50%;transform:translateY(-50%);width:22px;height:22px;padding:0;border-radius:50%;background:var(--surface);border:1px solid var(--border);font-size:11px;line-height:1;display:flex;align-items:center;justify-content:center;color:var(--muted)}.node.side-right .collapse-btn,.node.side-center .collapse-btn{right:-10px}.node.side-left .collapse-btn{left:-10px}.collapse-btn:hover{border-color:var(--accent);color:var(--accent)}.node-toolbar{position:absolute;bottom:-38px;left:50%;transform:translate(-50%);display:flex;gap:4px;background:var(--surface);padding:4px;border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow-lg);white-space:nowrap;z-index:5}.node-toolbar button{font-size:12px;padding:4px 8px}.zoom-controls{position:absolute;right:12px;bottom:12px;display:flex;gap:4px;align-items:center;background:var(--surface);padding:4px 6px;border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow)}.zoom-controls button{width:28px;height:28px;padding:0;font-size:16px}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;height:100vh;color:var(--muted)}