:root{--bg:#ffffff;--panel:#fafafa;--border:#dfe2e8;--ink:#1b1f2a;--muted:#6b7280;--navy:#1b1f36;--green:#12a670;--green2:#0d7a53;--danger:#dc2626}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;overscroll-behavior:none}.app{height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 14px;background:#fff;border-bottom:1px solid var(--border);flex-shrink:0}.brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:14px;color:var(--ink)}.brand .dot{width:8px;height:8px;border-radius:50%;background:var(--green)}.tag{font-size:10px;color:var(--muted);letter-spacing:.04em;font-weight:400}.nav-key{font-size:11px;padding:5px 11px;border-radius:5px;background:var(--navy);color:#fff;font-weight:600}.spacer{flex:1}.save-indicator{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--muted)}.backend-error{font-size:11px;color:var(--danger);margin-right:4px}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}button{cursor:pointer;font-family:inherit}.btn-toolbar{display:flex;align-items:center;gap:6px;font-size:13px;padding:9px 14px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--ink);min-height:40px}.btn-toolbar:hover{border-color:#b7bcc8}.scene-select{font-size:13px;padding:9px 10px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--ink);max-width:200px;min-height:40px}.tool-group{display:flex;border:1px solid var(--border);border-radius:8px;overflow:hidden}.tool-btn{padding:9px 13px;background:#fff;border:none;border-right:1px solid var(--border);color:var(--muted);display:flex;align-items:center;min-height:40px}.tool-btn:last-child{border-right:none}.tool-btn:hover:not(.active){background:var(--panel)}.tool-btn.active{background:var(--navy);color:#fff}.tool-btn:disabled{color:#c7cad3;cursor:default}.tool-btn:disabled:hover{background:#fff}.export-wrap{position:relative}.export-menu{position:absolute;top:calc(100% + 4px);right:0;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 20px #14161e1f;min-width:160px;z-index:30;overflow:hidden}.export-menu button{display:block;width:100%;text-align:left;padding:11px 14px;font-size:13px;background:none;border:none;color:var(--ink)}.export-menu button:hover{background:var(--panel)}.place-banner{display:flex;align-items:center;gap:10px;padding:10px 16px;background:#eafaf2;border-bottom:1px solid var(--border);font-size:13px;color:var(--ink)}.place-banner button{margin-left:auto;background:none;border:1px solid var(--border);border-radius:6px;padding:6px 12px;font-size:12px;color:var(--muted);min-height:36px}.place-banner button:hover{color:var(--ink);border-color:#b7bcc8}.custom-draft-banner{position:absolute;top:12px;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:10px;padding:8px 14px;background:#1b1f36;color:#fff;border-radius:20px;font-size:12.5px;box-shadow:0 6px 16px #14161e40;z-index:25;white-space:nowrap}.custom-draft-banner button{background:#ffffff1f;border:none;border-radius:14px;padding:5px 12px;font-size:12px;color:#fff}.custom-draft-banner button:disabled{opacity:.4}.custom-draft-banner button:not(:disabled):hover{background:#ffffff38}.screen{flex:1;min-height:0;display:flex}.palette{width:180px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column}.palette.collapsed{width:44px;align-items:center;padding-top:10px;gap:10px}.palette-collapse-btn{background:none;border:none;color:var(--muted);padding:4px;display:flex;align-items:center;justify-content:center;min-width:32px;min-height:32px}.palette-collapse-btn:hover{color:var(--ink)}.palette-collapsed-icon{color:var(--muted)}.palette-head{padding:12px 14px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.palette-body{flex:1;overflow-y:auto;padding:6px 0}.palette-group{margin-bottom:10px}.palette-group-label{padding:8px 14px 3px;font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.palette-item{display:flex;align-items:center;gap:10px;padding:9px 14px;cursor:grab;font-size:13px;color:var(--ink);min-height:44px}.palette-item:hover{background:#eef0f3}.palette-item:active{cursor:grabbing}.palette-item.pending{background:var(--green);color:#fff}.palette-hint{padding:10px 14px;font-size:10.5px;color:var(--muted);line-height:1.4;border-top:1px solid var(--border)}.canvas-wrap{position:relative;flex:1;background:#fff;overflow:hidden}.canvas-wrap svg{display:block;touch-action:none}.canvas-wrap.drawing svg{cursor:crosshair}.canvas-empty{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:var(--muted);font-size:13px;pointer-events:none;text-align:center;padding:0 24px}.node-label,.edge-tag{font-size:12px;fill:#4b5160;text-anchor:middle;font-weight:500}.waypoint-handle{fill:#fff;stroke:#12a670;stroke-width:2.2}.edit-fab{position:absolute;transform:translate(-50%,-100%);display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:20px;border:none;background:var(--navy);color:#fff;font-size:12.5px;font-weight:600;box-shadow:0 4px 12px #14161e40;z-index:20;white-space:nowrap}.edit-fab:hover{background:#252b4a}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0c1440;z-index:35;opacity:0;pointer-events:none;transition:opacity .2s}.sheet-backdrop.open{opacity:1;pointer-events:auto}.inspector-sheet{position:fixed;left:0;right:0;bottom:0;max-height:62vh;background:#fff;border-top:1px solid var(--border);border-radius:18px 18px 0 0;box-shadow:0 -10px 28px #14161e29;transform:translateY(100%);transition:transform .22s ease;z-index:40;display:flex;flex-direction:column;padding-bottom:env(safe-area-inset-bottom,0px)}.inspector-sheet.open{transform:translateY(0)}.sheet-grip{width:40px;height:4px;background:var(--border);border-radius:2px;margin:10px auto 2px;flex-shrink:0}.sheet-header-row{display:flex;align-items:flex-start;justify-content:space-between;padding:6px 18px 10px;flex-shrink:0}.ih-title{font-size:15px;font-weight:600;line-height:1.3;word-break:break-word}.ih-sub{font-size:11.5px;color:var(--muted);margin-top:2px}.sheet-close{background:var(--panel);border:none;border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;color:var(--muted);flex-shrink:0}.sheet-close:hover{color:var(--ink)}.inspector-body{padding:4px 18px 14px;display:flex;flex-direction:column;gap:16px;overflow-y:auto}.field label{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:6px}.field input[type=text],.field input[type=number],.field textarea,.field select{width:100%;border:1px solid var(--border);border-radius:8px;padding:11px 12px;font-size:15px;color:var(--ink);background:#fff;font-family:inherit;resize:vertical;min-height:44px}.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--green)}.field input:disabled{background:var(--panel);color:var(--muted)}.field-hint{font-size:11px;color:var(--muted);margin-top:6px;line-height:1.4}.length-row{display:flex;gap:8px}.length-row input{flex:1}.length-clear-btn{flex-shrink:0;padding:0 14px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--muted);font-size:12.5px;min-height:44px}.length-clear-btn:hover{color:var(--ink);border-color:#b7bcc8}.rotate-btn{display:flex;align-items:center;gap:8px;width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--ink);font-size:14px;min-height:44px}.rotate-btn:hover{border-color:var(--green)}.inspector-delete{padding:12px 18px 16px;border-top:1px solid var(--border);flex-shrink:0}.btn-delete{display:flex;align-items:center;gap:7px;color:#9aa1b0;background:none;border:none;font-size:13px;min-height:40px}.btn-delete:hover{color:var(--danger)}