:root{
  --bg:#f6f6f4;--dot:#cfcfca;--panel:#ffffff;--ink:#1d1d1f;--mut:#80808a;
  --line:#8a8a93;--node:#ffffff;--bd:#cfcfd4;--acc:#7c5cff;--hov:rgba(0,0,0,.07);
  --sh:0 1px 4px rgba(0,0,0,.18);--sh2:0 6px 24px rgba(0,0,0,.18);
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#1b1b1f;--dot:#34343b;--panel:#26262c;--ink:#ececf0;--mut:#9b9ba6;
    --line:#8e8e9b;--node:#2b2b33;--bd:#4a4a55;--acc:#9a82ff;--hov:rgba(255,255,255,.09);
    --sh:0 1px 4px rgba(0,0,0,.5);--sh2:0 6px 24px rgba(0,0,0,.55);
  }
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
html,body{margin:0;height:100%;overflow:hidden;overscroll-behavior:none;background:var(--bg);color:var(--ink);
  font:15px/1.4 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
body{position:fixed;inset:0}
button{font:inherit;color:inherit;cursor:pointer}

/* Canvas */
#vp{position:absolute;inset:0;overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none;
  background-color:var(--bg);
  background-image:radial-gradient(circle,var(--dot) 1.2px,transparent 1.6px);
  background-size:24px 24px;cursor:grab}
#vp.linking,#vp.linking *{cursor:crosshair!important}
#world{position:absolute;left:0;top:0;transform-origin:0 0}
#world.anim{transition:transform .22s ease}
#edges{position:absolute;left:0;top:0;overflow:visible;pointer-events:none}
#nodes{position:absolute;left:0;top:0}
#edges .vis{fill:none;stroke:var(--line);stroke-width:2;vector-effect:non-scaling-stroke;pointer-events:none}
#edges .hit{fill:none;stroke:transparent;stroke-width:22;vector-effect:non-scaling-stroke;pointer-events:stroke;cursor:pointer}
#edges .sel .vis{stroke:var(--acc);stroke-width:3}
#edges .ar{fill:var(--line)}
#edges .arS{fill:var(--acc)}
#tmp{fill:none;stroke:var(--acc);stroke-width:2;stroke-dasharray:6 5;vector-effect:non-scaling-stroke;pointer-events:none}

/* Caixas */
.node{--c:var(--bd);position:absolute;min-width:80px;padding:10px 12px;border-radius:12px;background:var(--node);
  border:2px solid var(--c);box-shadow:var(--sh);cursor:grab;touch-action:none}
.node[data-c="1"]{--c:#e5484d}
.node[data-c="2"]{--c:#f76b15}
.node[data-c="3"]{--c:#e5b800}
.node[data-c="4"]{--c:#30a46c}
.node[data-c="5"]{--c:#0ea5c6}
.node[data-c="6"]{--c:#8e4ec6}
@supports (background:color-mix(in srgb,red,blue)){
  .node:not([data-c="0"]){background:color-mix(in srgb,var(--c) 16%,var(--node))}
}
.node.sel{outline:3px solid var(--acc);outline-offset:2px;z-index:3}
.node.drag{cursor:grabbing;box-shadow:var(--sh2);z-index:5}
.node.target{outline:3px dashed var(--acc);outline-offset:3px}
.node.editing{cursor:text;z-index:6}
.txt{white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;min-height:1.4em;outline:none;
  user-select:none;-webkit-user-select:none}
.txt:empty::before{content:attr(data-ph);color:var(--mut)}
.node.editing .txt{user-select:text;-webkit-user-select:text;cursor:text}
.ln,.rs{display:none;position:absolute;touch-action:none}
.node.sel:not(.editing) .ln,.node.sel:not(.editing) .rs{display:block}
@media (hover:hover){.node:hover:not(.editing):not(.drag) .ln{display:block}}
.ln{right:-15px;top:50%;margin-top:-13px;width:26px;height:26px;border-radius:50%;background:var(--acc);
  border:3px solid var(--panel);box-shadow:var(--sh);cursor:crosshair}
.ln::after{content:"+";position:absolute;inset:0;color:#fff;font-weight:700;text-align:center;line-height:20px}
.rs{right:0;bottom:0;width:22px;height:22px;cursor:nwse-resize}
.rs::after{content:"";position:absolute;right:3px;bottom:3px;width:11px;height:11px;
  border-right:3px solid var(--acc);border-bottom:3px solid var(--acc);border-radius:0 0 6px 0}

#empty{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);text-align:center;color:var(--mut);pointer-events:none;padding:0 20px}

/* Barras */
#top,#bar{position:fixed;z-index:20;background:var(--panel);box-shadow:var(--sh2);border-radius:14px}
#top{top:calc(8px + env(safe-area-inset-top));left:max(8px,env(safe-area-inset-left));right:max(8px,env(safe-area-inset-right));
  display:flex;align-items:center;gap:6px;padding:5px}
#top button,#bar button{border:0;background:transparent;border-radius:10px;min-width:40px;height:40px}
#top button:hover,#bar button:hover:not(:disabled){background:var(--hov)}
#title{flex:1;min-width:0;height:40px;border:0;background:transparent;color:var(--ink);font:600 16px system-ui,sans-serif;
  padding:0 8px;border-radius:10px;outline:none;text-overflow:ellipsis}
#title:focus{background:var(--hov)}
.zoom{display:flex;align-items:center;gap:2px}
.zoom button{font-size:18px}
#zl{min-width:44px;text-align:center;color:var(--mut);font-size:13px}
@media (max-width:520px){#zl{display:none}}

#bar{bottom:calc(10px + env(safe-area-inset-bottom));left:0;right:0;margin:0 auto;width:max-content;max-width:calc(100% - 16px);
  display:flex;align-items:center;gap:2px;padding:5px;overflow-x:auto;scrollbar-width:none}
#bar::-webkit-scrollbar{display:none}
#bar button:not(.sw){display:flex;flex-direction:column;align-items:center;justify-content:center;height:46px;min-width:50px;padding:0 6px;font-size:11px;line-height:1.1;white-space:nowrap}
#bar button i{font-style:normal;font-size:18px;line-height:1.1}
#bar button:disabled{opacity:.35;cursor:default}
#bar .danger{color:#e5484d}
.sep{width:1px;height:28px;background:var(--bd);margin:0 4px;flex:none}
.sws{display:flex;align-items:center;gap:6px;padding:0 4px}
.sw{width:28px!important;min-width:28px!important;height:28px!important;border-radius:50%!important;border:3px solid var(--bd)!important;flex:none}
.sw[data-c="0"]{background:var(--node)!important}
.sw[data-c="1"]{background:#e5484d!important}
.sw[data-c="2"]{background:#f76b15!important}
.sw[data-c="3"]{background:#e5b800!important}
.sw[data-c="4"]{background:#30a46c!important}
.sw[data-c="5"]{background:#0ea5c6!important}
.sw[data-c="6"]{background:#8e4ec6!important}
.sw.on{border-color:var(--ink)!important}

/* Painel */
#panel{position:fixed;inset:0;z-index:40;background:rgba(0,0,0,.45);display:flex;align-items:flex-start;justify-content:center;
  padding:calc(12px + env(safe-area-inset-top)) 12px 12px}
.sheet{width:100%;max-width:440px;max-height:100%;overflow:auto;background:var(--panel);border-radius:16px;box-shadow:var(--sh2);padding:14px}
.sh-h{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;font-size:17px}
.sh-h button{border:0;background:transparent;font-size:18px;width:36px;height:36px;border-radius:10px}
.sh-h button:hover{background:var(--hov)}
#list{list-style:none;margin:0 0 10px;padding:0;display:flex;flex-direction:column;gap:4px}
#list li{display:flex;align-items:center;gap:4px;border-radius:10px;border:1px solid var(--bd)}
#list li.cur{border-color:var(--acc);background:var(--hov)}
#list .open{flex:1;min-width:0;text-align:left;border:0;background:transparent;padding:10px 12px;border-radius:10px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#list .open small{display:block;color:var(--mut);font-size:12px}
#list .rm{border:0;background:transparent;width:38px;height:38px;border-radius:10px;color:#e5484d}
#list .rm:hover{background:var(--hov)}
.acts{display:flex;flex-direction:column;gap:6px}
.acts button{border:1px solid var(--bd);background:transparent;border-radius:10px;padding:11px 12px;text-align:left}
.acts button:hover{background:var(--hov)}
.help{margin-top:12px;color:var(--mut);font-size:13.5px}
.help summary{cursor:pointer;color:var(--ink);padding:6px 0}
.help ul{padding-left:18px;margin:6px 0 0}
.help li{margin-bottom:6px}

#toast{position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom));transform:translateX(-50%) translateY(10px);
  background:#222;color:#fff;padding:9px 14px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;
  transition:.2s;z-index:60;max-width:90%;text-align:center}
#toast.show{opacity:1;transform:translateX(-50%)}