:root{
  --bg:#f5f7fb; --card:#fff; --ink:#1f2937; --muted:#64748b; --accent:#2563eb;
  --ok:#10b981; --warn:#f59e0b; --bad:#ef4444; --line:#e5e7eb;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);font-family:system-ui,Segoe UI,Roboto,Arial}

header{
  display:flex; gap:10px; align-items:center; padding:10px 14px;
  border-bottom:1px solid var(--line); background:#fff; position:sticky; top:0; z-index:5;
}
header h1{font-size:18px;margin:0}
button{border:0;border-radius:8px;padding:8px 12px;font-weight:600;cursor:pointer}
.primary{background:var(--accent);color:#fff}
.ghost{background:#eef2ff}
.danger{background:#fee2e2}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#eef2ff;color:#3730a3;font-size:12px}
label{font-size:12px;color:var(--muted)}
input,select{width:100%;padding:8px;border:1px solid var(--line);border-radius:8px}
.small{font-size:12px}

/* ====== GRID BASE (desktop) ====== */
.wrap{
  display:grid;
  grid-template-columns:260px 1fr 360px;
  grid-template-areas:"left stage right";
  gap:10px;
  height:calc(100vh - 60px);
  padding:10px;
}
.panel{background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:auto}
.panel--left  {grid-area:left;}
.panel--stage {grid-area:stage;}
.panel--right {grid-area:right;}

h3{margin:0;padding:12px;border-bottom:1px solid var(--line);font-size:15px;background:#fff;position:sticky;top:0;z-index:1}
.pad{padding:12px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.controls{display:flex;gap:8px;flex-wrap:wrap}

.list .item{
  padding:10px;border:1px dashed #cbd5e1;border-radius:8px;margin-bottom:8px;cursor:grab;
  display:flex;justify-content:space-between;align-items:center
}
.hint{font-size:12px;color:var(--muted)}

/* ====== STAGE / NODOS ====== */
.stage{
  position:relative; min-height:520px; border:1px solid var(--line);
  border-radius:10px; background:#fbfdff; overflow:hidden;
}
.stage, .node{ touch-action:none; }           /* arrastre con dedo */
.svg{ position:absolute; inset:0; width:100%; height:100%; pointer-events:none; }

.node{
  position:absolute; min-width:120px; min-height:64px;
  background:#fff; border:2px solid #334155; border-radius:10px;
  box-shadow:0 1px 2px rgba(0,0,0,.05); cursor:move; padding:8px 10px;
}
.node h4{margin:0 0 6px 0;font-size:14px}
.titleRow{display:flex;justify-content:space-between;align-items:center;gap:8px}
.actions{display:flex;gap:6px;flex-wrap:wrap}
.selected{outline:2px solid var(--accent)}
.ports{position:absolute;right:6px;bottom:6px;display:flex;gap:4px}
.port{width:12px;height:12px;border-radius:50%;background:#334155;border:2px solid #fff;box-shadow:0 0 0 1px #334155}
.port.out{background:#0f766e;box-shadow:0 0 0 1px #0f766e}
.port.in{background:#7c3aed;box-shadow:0 0 0 1px #7c3aed}

.connBanner{
  position:absolute; left:12px; top:12px; z-index:2;
  background:#111827; color:#fff; padding:6px 10px; border-radius:8px; font-size:13px; opacity:.9;
}

/* ====== RESULTADOS ====== */
.kpi{display:grid;grid-template-columns:repeat(2,minmax(120px,1fr));gap:10px}
.kpi .box{border:1px solid var(--line);border-radius:10px;padding:10px}
.kpi b{font-size:18px}
.ok{color:var(--ok)} .warn{color:var(--warn)} .bad{color:var(--bad)}

.chartContainer{position:relative;height:320px;margin-top:12px;border:1px solid var(--line);border-radius:10px;padding:8px;background:#fff}
.chartContainer.small{height:220px}
.fullBtn{position:absolute;right:10px;top:8px}
.chartContainer.fullscreen{
  position:fixed; inset:60px 12px 12px 12px; z-index:50; background:#fff; height:auto;
}
.toast{
  position:fixed; left:50%; transform:translateX(-50%);
  bottom:16px; background:#111827; color:#fff; padding:8px 12px; border-radius:10px; font-size:14px; opacity:.95; z-index:100;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 1200px){
  .wrap{ grid-template-columns:240px 1fr 320px; }
}
@media (max-width: 992px){
  .wrap{
    grid-template-columns:1fr;
    grid-template-areas:
      "left"
      "stage"
      "right";
    height:auto;                 /* permite crecer verticalmente */
  }
  .panel{ overflow:visible; }
  .stage{ min-height:460px; }    /* asegura que el lienzo se vea */
}
@media (max-width: 720px){
  .node{
    left: 8px !important;              /* alineados a la izquierda por defecto */
    min-width: 220px;
    max-width: 94vw;                   /* no más ancho que la vista */
    width: auto;                       /* que se adapte */
    word-wrap: break-word;
  }
  .stage{ padding-bottom: 16px; }      /* un respiro para que no corte el último */
}/*
@media (max-width: 720px){
  header{flex-wrap:wrap}
  header select, header button{width:100%}
  .stage{ min-height:500px; }
  .kpi b{font-size:16px}
  .chartContainer{height:280px}
  .chartContainer.small{height:200px}
}*/