:root{
  --bg:#0b0f14;
  --text:#e5e7eb;
  --muted:#94a3b8;
}
*{box-sizing:border-box}
body{
  margin:0;
  background: radial-gradient(1200px 800px at 20% -10%, rgba(96,165,250,.10), transparent 60%),
              radial-gradient(1200px 800px at 90% 10%, rgba(52,211,153,.07), transparent 55%),
              var(--bg);
  color:var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  overflow:hidden; /* prevents scroll when labels extend a little */
}

.wrap{
  height:100vh;
  display:flex;
  flex-direction:column;
}

header{
  padding:18px 18px 8px;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
}

h1{margin:0;font-size:20px;letter-spacing:.2px}
.sub{color:var(--muted);font-size:12px;margin-top:6px;max-width:880px}

#viz{
  flex:1;
  min-height:0;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:12px;
}

svg{
  display:block;
  max-width:100%;
  max-height:100%;
}

.link{
  fill:none;
  stroke-width:1.35;
  stroke-opacity:.55;
}

.node text{ font-size:12px; }

.tooltip{
  position:fixed;
  pointer-events:none;
  background:rgba(17,24,39,.95);
  border:1px solid rgba(255,255,255,.12);
  padding:8px 10px;
  border-radius:10px;
  display:none;
  font-size:12px;
  max-width:340px;
}
.tooltip b{display:block}
.tooltip .m{color:var(--muted); margin-top:2px}

.headerLeft{
  display:flex;
  align-items:center;
  gap:14px;
}