*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
--bg:#f0f2f5;--surface:#fff;--surface2:#f7f8fa;--border:#dde1e7;--text:#1a1d23;--text2:#6b7280;--text3:#9ca3af;
--accent:#6366f1;--accent-hover:#4f52e0;--accent-light:#eef2ff;--accent-dark:#3730a3;
--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;
--node-start:#10b981;--node-end:#ef4444;--node-process:#6366f1;--node-decision:#f59e0b;
--node-llm:#8b5cf6;--node-code:#06b6d4;--node-condition:#f97316;--node-http:#3b82f6;
--node-repeat:#0ea5e9;
--shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);
--shadow-md:0 4px 6px rgba(0,0,0,.07),0 2px 4px rgba(0,0,0,.06);
--shadow-lg:0 10px 15px rgba(0,0,0,.1),0 4px 6px rgba(0,0,0,.05);
--radius:8px;--radius-lg:12px;--radius-xl:16px;
--toolbar-h:56px;--panel-w:328px;--footer-h:48px;--palette-w:180px;
--transition:.15s ease;
}
[data-theme="dark"]{
--bg:#0f1117;--surface:#1a1d2e;--surface2:#232638;--border:#2e3250;--text:#e2e8f0;--text2:#94a3b8;--text3:#64748b;
--accent:#818cf8;--accent-hover:#6366f1;--accent-light:#1e1b4b;--accent-dark:#c7d2fe;
--shadow:0 1px 3px rgba(0,0,0,.4),0 1px 2px rgba(0,0,0,.3);
--shadow-md:0 4px 6px rgba(0,0,0,.3),0 2px 4px rgba(0,0,0,.2);
--shadow-lg:0 10px 15px rgba(0,0,0,.4),0 4px 6px rgba(0,0,0,.2);
}
html,body{height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-size:16px;color:var(--text);background:var(--bg)}
#app{width:100%;max-width:100%;height:100vh;display:flex;flex-direction:column;overflow:hidden;margin-bottom:0px}
/* TOOLBAR */
#toolbar{width:100%;max-width:100%;height:var(--toolbar-h);background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:4px;padding:0 12px;flex-shrink:0;z-index:100;box-shadow:var(--shadow);margin-bottom:0px}
.toolbar-logo{display:flex;align-items:center;gap:8px;margin-right:8px;cursor:default}
.toolbar-logo svg{width:28px;height:28px;flex-shrink:0}
.toolbar-logo-text{font-size:16px;font-weight:700;color:var(--accent);white-space:nowrap}
.toolbar-divider{width:1px;height:28px;background:var(--border);margin:0 6px;flex-shrink:0}
.tb-btn{display:flex;align-items:center;justify-content:center;gap:5px;height:34px;padding:0 10px;border:none;background:transparent;color:var(--text2);border-radius:var(--radius);cursor:pointer;font-size:14px;white-space:nowrap;transition:background var(--transition),color var(--transition);flex-shrink:0}
.tb-btn:hover{background:var(--surface2);color:var(--text)}
.tb-btn.active{background:var(--accent-light);color:var(--accent)}
.tb-btn svg{width:16px;height:16px;flex-shrink:0}
.tb-btn-icon{width:34px;padding:0}
.tb-btn-primary{background:var(--accent);color:#fff}
.tb-btn-primary:hover{background:var(--accent-hover);color:#fff}
.toolbar-title{flex:1;text-align:center;min-width:0}
.toolbar-title input{border:none;background:transparent;font-size:16px;font-weight:600;color:var(--text);text-align:center;outline:none;width:100%;max-width:240px;padding:4px 8px;border-radius:var(--radius);transition:background var(--transition)}
.toolbar-title input:hover,.toolbar-title input:focus{background:var(--surface2)}
.toolbar-right{display:flex;align-items:center;gap:4px;margin-left:auto}
.zoom-display{font-size:13px;color:var(--text2);min-width:44px;text-align:center;cursor:pointer;padding:4px 6px;border-radius:var(--radius);transition:background var(--transition)}
.zoom-display:hover{background:var(--surface2)}
/* MAIN */
#main{flex:1;display:flex;overflow:hidden;position:relative}
/* PALETTE */
#palette{width:var(--palette-w);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;overflow:hidden;transition:width var(--transition)}
#palette.collapsed{width:0}
.palette-header{padding:10px 12px 6px;font-size:12px;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border)}
.palette-scroll{flex:1;overflow-y:auto;padding:6px}
.palette-section-title{font-size:10px;font-weight:600;color:var(--text3);text-transform:uppercase;letter-spacing:.06em;padding:7px 6px 3px}
.palette-node{display:flex;align-items:center;gap:7px;padding:6px 8px;border-radius:var(--radius);cursor:grab;user-select:none;margin-bottom:2px;border:1px solid transparent;transition:all var(--transition);font-size:13px;color:var(--text)}
.palette-node:hover{background:var(--surface2);border-color:var(--border)}
.palette-node:active{cursor:grabbing;transform:scale(.97)}
.palette-node-dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}
.palette-node-name{font-size:13px;line-height:1.2}
.palette-node-desc{font-size:11px;color:var(--text3)}
/* CANVAS */
#canvas-wrap{flex:1;position:relative;overflow:hidden;background:var(--bg)}
#canvas{position:absolute;top:0;left:0;cursor:default;display:block}
/* Checkerboard behind closed panel */
#panel-placeholder{width:var(--panel-w);min-width:var(--panel-w);flex-shrink:0;border-left:1px solid var(--border);background-image:linear-gradient(45deg,#e5e7eb 25%,transparent 25%),linear-gradient(-45deg,#e5e7eb 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e5e7eb 75%),linear-gradient(-45deg,transparent 75%,#e5e7eb 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0;display:none;align-items:center;justify-content:center}
[data-theme="dark"] #panel-placeholder{background-image:linear-gradient(45deg,#1e2030 25%,transparent 25%),linear-gradient(-45deg,#1e2030 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#1e2030 75%),linear-gradient(-45deg,transparent 75%,#1e2030 75%)}
#panel-placeholder.visible{display:flex}
.panel-reopen-btn{display:flex;flex-direction:column;align-items:center;gap:6px;padding:12px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);cursor:pointer;color:var(--text2);font-size:12px;box-shadow:var(--shadow);transition:all var(--transition)}
.panel-reopen-btn:hover{background:var(--accent-light);color:var(--accent);border-color:var(--accent)}
.panel-reopen-btn svg{width:20px;height:20px}
/* Minimap */
#minimap{position:absolute;bottom:16px;right:16px;width:160px;height:100px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md);cursor:pointer}
#minimap canvas{width:100%;height:100%}
.minimap-label{position:absolute;top:4px;left:6px;font-size:10px;color:var(--text3);pointer-events:none}
/* PROPERTIES PANEL */
#props-panel{width:var(--panel-w);min-width:var(--panel-w);background:var(--surface);border-left:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;overflow:hidden}
#props-panel.panel-closed{display:none}
.panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--border);flex-shrink:0}
.panel-header h3{font-size:15px;font-weight:600;color:var(--text);margin:0}
.panel-close-btn{background:none;border:none;cursor:pointer;color:var(--text2);padding:4px;border-radius:6px;display:flex;align-items:center;transition:all var(--transition)}
.panel-close-btn:hover{background:var(--surface2);color:var(--danger)}
.panel-body{flex:1;overflow-y:auto;padding:14px}
.prop-group{margin-bottom:16px}
.prop-label{display:block;font-size:13px;font-weight:500;color:var(--text2);margin-bottom:5px}
.prop-input{width:100%;padding:7px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface2);color:var(--text) !important;font-size:14px;outline:none;transition:border-color var(--transition)}
.prop-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.prop-textarea{resize:vertical;min-height:64px;font-family:inherit}
.prop-select{width:100%;padding:7px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface2);color:var(--text);font-size:14px;outline:none;cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:28px}
.prop-select:focus{border-color:var(--accent)}
.prop-color{display:flex;align-items:center;gap:8px}
.prop-color input[type=color]{width:36px;height:36px;border:1px solid var(--border);border-radius:6px;padding:2px;cursor:pointer;background:var(--surface2)}
.node-type-badge{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:500;margin-bottom:12px}
.prop-btn{width:100%;padding:8px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface2);color:var(--text);font-size:14px;cursor:pointer;transition:all var(--transition);font-weight:500}
.prop-btn:hover{background:var(--border)}
.prop-btn-danger{border-color:var(--danger);color:var(--danger)}
.prop-btn-danger:hover{background:var(--danger);color:#fff}
.prop-row{display:flex;gap:8px}
.prop-row .prop-group{flex:1}
.prop-section-divider{border:none;border-top:1px solid var(--border);margin:14px 0}
/* Show-in-node checkbox row */
.show-in-node-row{display:flex;align-items:center;gap:8px;padding:8px 10px;background:var(--accent-light);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;cursor:pointer}
.show-in-node-row input[type=checkbox]{width:16px;height:16px;accent-color:var(--accent);cursor:pointer;flex-shrink:0}
.show-in-node-row label{font-size:13px;color:var(--accent);cursor:pointer;font-weight:500}
/* Panel idle */
#panel-idle{display:flex;flex-direction:column;align-items:center;padding:16px 14px}
#panel-idle p{font-size:14px;color:var(--text3);text-align:center;margin-bottom:16px;line-height:1.5}
.diagnostics{margin-top:18px;padding:12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface2)}
.diagnostics h4{font-size:13px;font-weight:600;color:var(--text);margin-bottom:7px}
.diagnostics p,.diagnostics li{font-size:12px;line-height:1.45;color:var(--text2)}
.diagnostics #diagnostics-summary.has-errors{color:var(--danger);font-weight:600}
.diagnostics #diagnostics-summary.has-warnings{color:var(--warning);font-weight:600}
.diagnostics ul{list-style:none;margin-top:6px}
.diagnostics li+li{margin-top:6px}
.diagnostic-node{padding:0;border:0;background:none;color:var(--accent);font:inherit;text-align:left;text-decoration:underline;cursor:pointer}
/* CONTEXT MENU */
#ctx-menu{position:fixed;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:4px;z-index:1000;min-width:180px;display:none; max-width:300px;}
.ctx-item{display:flex;align-items:center;gap:9px;padding:7px 12px;border-radius:var(--radius);cursor:pointer;font-size:14px;color:var(--text);transition:background var(--transition),color var(--transition)}
.ctx-item:hover{background:var(--surface2)}
.ctx-item.danger{color:var(--danger)}
.ctx-item.danger:hover{background:#fef2f2}
.ctx-item svg{width:15px;height:15px;flex-shrink:0;color:var(--text2)}
.ctx-item.danger svg{color:var(--danger)}
.ctx-sep{height:1px;background:var(--border);margin:3px 0}
/* TOAST */
#toast-container{position:fixed;top:72px;right:16px;z-index:2000;display:flex;flex-direction:column;gap:8px}
.toast{display:flex;align-items:center;gap:10px;padding:10px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);font-size:14px;color:var(--text);min-width:220px;max-width:340px;animation:slideIn .2s ease;border-left:3px solid var(--accent)}
.toast.success{border-left-color:var(--success)}
.toast.warning{border-left-color:var(--warning)}
.toast.error{border-left-color:var(--danger)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
/* MODALS */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:500;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity .2s;width: 100%;
    max-width: 100%;}
.modal-overlay.open{opacity:1;pointer-events:all}
.modal{background:var(--surface);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);width:100%;max-width:520px;max-height:80vh;display:flex;flex-direction:column;overflow:hidden;transform:scale(.95);transition:transform .2s}
.modal-overlay.open .modal{transform:scale(1)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 14px;border-bottom:1px solid var(--border);flex-shrink:0}
.modal-header h2{font-size:18px;font-weight:600;color:var(--text);margin:0}
.modal-close{background:none;border:none;cursor:pointer;color:var(--text2);padding:4px;border-radius:6px;display:flex;line-height:1}
.modal-close:hover{background:var(--surface2);color:var(--text)}
.modal-body{flex:1;overflow-y:auto;padding:20px}
.modal-footer{padding:14px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px;flex-shrink:0}
.btn{padding:8px 18px;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;border:1px solid transparent;transition:all var(--transition)}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-secondary{background:var(--surface2);color:var(--text);border-color:var(--border)}
.btn-secondary:hover{background:var(--border)}
.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-danger:hover{opacity:.9}
.modal-body p{font-size:18px;color:var(--text2);line-height:1.6;margin-bottom:12px}
.modal-body h2{font-size:22px;font-weight:700;color:var(--text);margin-bottom:10px}
.modal-body h3{font-size:16px;font-weight:600;color:var(--text);margin:16px 0 6px}
.modal-body ul{padding-left:20px;margin-bottom:12px}
.modal-body li{font-size:16px;color:var(--text2);margin-bottom:4px;line-height:1.5}
.settings-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border)}
.settings-row:last-child{border-bottom:none}
.settings-label{font-size:15px;color:var(--text)}
.settings-desc{font-size:13px;color:var(--text3);margin-top:2px}
.toggle{position:relative;width:42px;height:24px;flex-shrink:0}
.toggle input{opacity:0;width:0;height:0}
.toggle-slider{position:absolute;inset:0;background:var(--border);border-radius:20px;cursor:pointer;transition:background .2s}
.toggle-slider::before{content:'';position:absolute;width:18px;height:18px;left:3px;top:3px;background:#fff;border-radius:50%;transition:transform .2s}
.toggle input:checked+.toggle-slider{background:var(--accent)}
.toggle input:checked+.toggle-slider::before{transform:translateX(18px)}
.kbd{display:inline-block;padding:2px 6px;background:var(--surface2);border:1px solid var(--border);border-radius:4px;font-size:12px;font-family:monospace;color:var(--text2)}
#modal-alert .modal,#modal-confirm .modal{max-width:400px}
.alert-msg,.confirm-msg{font-size:16px;color:var(--text);line-height:1.6;padding:4px 0 8px}
#modal-prompt .modal{max-width:420px}
.prompt-msg{font-size:15px;color:var(--text2);margin-bottom:10px}
#modal-prompt-input{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface2);color:var(--text);font-size:15px;outline:none;margin-top:4px}
#modal-prompt-input:focus{border-color:var(--accent)}
/* Export options */
.export-option-row{display:flex;align-items:center;gap:8px;margin:8px 0 14px;padding:8px 10px;background:var(--surface2);border-radius:var(--radius);border:1px solid var(--border)}
.export-option-row input[type=checkbox]{width:15px;height:15px;accent-color:var(--accent);cursor:pointer}
.export-option-row label{font-size:14px;color:var(--text);cursor:pointer}
/* FOOTER */
#footer{width:100%;max-width:100%;height:var(--footer-h);background:var(--surface);border-top:1px solid var(--border);display:flex;align-items:center;padding:0 12px;gap:4px;flex-shrink:0;z-index:100;margin-bottom:0px;transition:height .2s,opacity .2s;overflow:hidden}
#footer.hidden{height:0;opacity:0;border:none}
.footer-btn{display:flex;align-items:center;gap:5px;height:30px;padding:0 10px;border:none;background:transparent;color:var(--text2);border-radius:var(--radius);cursor:pointer;font-size:13px;transition:background var(--transition),color var(--transition);white-space:nowrap}
.footer-btn:hover{background:var(--surface2);color:var(--text)}
.footer-btn svg{width:14px;height:14px}
.footer-sep{width:1px;height:18px;background:var(--border);margin:0 2px}
.footer-right{margin-left:auto;display:flex;align-items:center;gap:4px}
.footer-close-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:none;background:transparent;color:var(--text3);border-radius:50%;cursor:pointer;transition:all var(--transition)}
.footer-close-btn:hover{background:var(--danger);color:#fff}
#selection-box{position:absolute;border:1.5px dashed var(--accent);background:rgba(99,102,241,.06);pointer-events:none;display:none;z-index:5}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text3)}
@media(max-width:768px){
  #palette{display:none}
  #props-panel{position:fixed;right:0;top:var(--toolbar-h);bottom:var(--footer-h);width:min(var(--panel-w),100vw)!important;z-index:200;box-shadow:var(--shadow-lg)}
  .toolbar-logo-text{display:none}
  .tb-btn span{display:none}
  .toolbar-title input{max-width:120px}
  #panel-placeholder{display:none!important}
}
@media(max-width:480px){:root{--panel-w:100vw}}