/* Reset + tema */
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial}
:root{
  --bg:#f6f7fb; --fg:#0f172a; --card:#ffffff; --muted:#64748b; --ring:#e2e8f0;
  --primary:#2563eb;
  --shadow:0 10px 30px rgba(2,6,23,.10);
  --shadow-strong:0 18px 60px rgba(2,6,23,.15);
}
body.light{ background:var(--bg); color:var(--fg); }
body.dark{
  --bg:#0b1220; --fg:#e5e7eb; --card:#0f172a; --muted:#a3aed0; --ring:#1f2a44;
  background:var(--bg); color:var(--fg);
}

/* Topbar */
.topbar{height:56px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;background:var(--card);border-bottom:1px solid var(--ring);position:sticky;top:0;z-index:10}
.topbar .left,.topbar .right{display:flex;align-items:center;gap:8px}
.app-title{font-size:16px;margin:0 8px 0 0;white-space:nowrap}
.icon-btn{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;border:1px solid var(--ring);background:var(--card);cursor:pointer;box-shadow:var(--shadow)}
.icon-btn[disabled]{opacity:.5;cursor:not-allowed}
.icon-btn svg{width:16px;height:16px;display:block}
.zoom-box{display:flex;align-items:center;gap:8px;border:1px solid var(--ring);border-radius:999px;padding:4px 10px;background:var(--card);box-shadow:var(--shadow)}
.zoom-value{min-width:52px;text-align:center}
.menu{ position:relative }
.menu>button{border:1px solid var(--ring);padding:8px 12px;border-radius:8px;background:var(--card);cursor:pointer;box-shadow:var(--shadow)}
.menu .items{position:absolute;top:calc(100% + 6px);right:0;min-width:140px;background:var(--card);border:1px solid var(--ring);border-radius:8px;padding:6px;display:none;box-shadow:var(--shadow-strong)}
.menu[aria-expanded="true"] .items{display:block}
.menu .items button{width:100%;border:none;background:none;padding:8px 10px;text-align:left;cursor:pointer;color:var(--fg)}
.menu .items button:hover{background:rgba(0,0,0,.05)}
body.dark .menu .items button:hover{background:rgba(255,255,255,.06)}

/* Workspace / Canvas */
#workspace{height:calc(var(--vh,1vh)*100 - 56px);overflow:auto;position:relative;cursor:grab;touch-action:none}
@supports (height:100svh){#workspace{height:calc(100svh - 56px)}}
#workspace.grabbing{cursor:grabbing}
.canvas{position:absolute;top:0;left:0;min-width:100%;min-height:100%;transform-origin:0 0;transition:transform .18s ease-out;background-image:radial-gradient(rgba(0,0,0,.06) 1px,transparent 1px);background-size:24px 24px;will-change:transform}
.nodes{position:absolute;top:0;left:0}

/* Nodos */
.node{position:absolute;background:var(--card);border:1px solid var(--ring);border-radius:14px;padding:12px;min-width:140px;max-width:320px;display:flex;flex-direction:column;gap:6px;box-shadow:var(--shadow);cursor:grab;isolation:isolate}
.node:focus{outline:2px solid #93c5fd;outline-offset:2px}
.node .title{font-weight:700;line-height:1.2;white-space:pre-line}
.node .body{color:var(--muted);font-size:13px;white-space:pre-line}

/* Anti-desborde media */
.node .media{overflow:clip;clip-path:inset(0 round 10px);-webkit-clip-path:inset(0 round 10px);contain:paint;-webkit-mask-image:-webkit-radial-gradient(#fff,#fff);width:100%;border-radius:10px;background:rgba(0,0,0,.05)}
@supports not (overflow:clip){.node .media{overflow:hidden}}
.node .media img{width:100%;height:100%;object-fit:var(--objfit,contain);display:block}
.node .media[data-fit="contain"]{--objfit:contain;height:min(var(--media-h,150px),35vw,360px)}
.node .media[data-fit="cover"]{--objfit:cover;height:min(var(--media-h,150px),35vw,360px)}
@media (max-width:600px){
  .node .media[data-fit="contain"],.node .media[data-fit="cover"]{height:min(var(--media-h,150px),60vw,300px)}
}

/* Variantes visuales */
.node.root{background:#061b2f;color:#fff;border-color:#061b2f;box-shadow:var(--shadow-strong)}
.node.root .body{color:#c7d2fe}
.node.primary{background:#0b3a6f;color:#fff;border-color:#0b3a6f}
.node.accent{background:#6b0f2b;color:#fff;border-color:#6b0f2b}
.node.leaf{background:#fff;color:inherit;border-color:#e2e8f0}

/* Edges (ramas) – SIN color/width por defecto para que JS mande */
.edges{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}
.edge{fill:none;stroke-linecap:round;filter:drop-shadow(0 1px 0 rgba(0,0,0,.15))}

/* Modal / panel */
.modal{border:none;padding:0;background:transparent}
.modal::backdrop{background:rgba(0,0,0,.25);backdrop-filter:blur(2px)}
.panel{background:var(--card);color:inherit;border:1px solid var(--ring);border-radius:12px;width:min(900px,92vw);max-height:80vh;display:flex;flex-direction:column;overflow:hidden}
.panel-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--ring)}
.panel-body{padding:12px 14px;overflow:auto}
.panel-actions{display:flex;justify-content:flex-end;gap:8px;padding:12px 14px;border-top:1px solid var(--ring)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.stack{display:flex;flex-direction:column;gap:6px}

/* Botones */
.primary{background:var(--primary);color:#fff;border:none;border-radius:10px;padding:10px 14px;font-weight:600;cursor:pointer;box-shadow:var(--shadow)}
.ghost{background:transparent;color:inherit;border:1px solid var(--ring);border-radius:10px;padding:10px 14px;font-weight:600;cursor:pointer}