:root{
  --bg:#0a0d12; --bg2:#0e1219; --panel:#121823; --panel2:#161d2a;
  --ink:#e7ecf3; --soft:#9aa6b8; --faint:#5f6b7e; --line:#222c3a; --line2:#1a212d;
  --cyan:#4fd1c5; --amber:#f5a623; --violet:#8a7cff; --red:#ef4444;
  --grid:#141a24;
}
*{margin:0;box-sizing:border-box}
[hidden]{display:none!important}   /* must beat .overlay/aside display rules */
html,body{height:100%}
body{
  background:var(--bg); color:var(--ink); overflow:hidden;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif; font-size:14px;
}
.dot{color:var(--amber)}
.k{font-family:ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px}

/* overlay / login */
.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(900px 600px at 78% -10%,rgba(79,209,197,.06),transparent 60%),rgba(10,13,18,.92);z-index:50}
.login-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:30px;width:340px;display:flex;flex-direction:column;gap:12px}
.login-card h1{font-size:44px;font-weight:800;letter-spacing:-.03em;line-height:.95;margin-bottom:6px}
input,textarea,select{background:var(--bg2);border:1px solid var(--line);border-radius:9px;color:var(--ink);padding:10px 12px;font:inherit;width:100%}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--cyan)}
textarea{resize:vertical}
button{cursor:pointer;font:inherit}
.login-card button[type=submit]{background:var(--cyan);color:#04201d;border:none;border-radius:9px;padding:11px;font-weight:700}
.err{color:var(--red);font-size:13px;min-height:16px}

/* top bar */
.bar{position:fixed;top:0;left:0;right:0;height:52px;display:flex;align-items:center;gap:12px;
  padding:0 16px;background:rgba(14,18,25,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:20}
.brand{font-weight:800;letter-spacing:-.02em;font-size:18px}
.hint{color:var(--faint);font-size:12px}
.spacer{flex:1}
.btn{background:var(--panel2);border:1px solid var(--line);color:var(--ink);border-radius:9px;padding:8px 12px}
.btn:hover{border-color:var(--cyan)}
.btn.ghost{background:transparent;color:var(--soft)}
.btn.danger{border-color:#5a2a2a;color:#ff9a9a}

/* stage / world */
#stage{position:fixed;inset:52px 0 0 0;overflow:hidden;cursor:grab;
  background:
    linear-gradient(var(--grid) 1px,transparent 1px) 0 0/32px 32px,
    linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/32px 32px,
    var(--bg)}
#stage.panning{cursor:grabbing}
#world{position:absolute;left:0;top:0;width:12000px;height:12000px;transform-origin:0 0}
#edges{position:absolute;left:0;top:0;pointer-events:none;overflow:visible}
#labels{position:absolute;left:0;top:0}
#cards{position:absolute;left:0;top:0}

/* node card */
.card{position:absolute;width:220px;background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:12px 13px;box-shadow:0 6px 20px rgba(0,0,0,.35);user-select:none;cursor:grab}
.card.sel{border-color:var(--cyan);box-shadow:0 0 0 1px var(--cyan),0 8px 26px rgba(0,0,0,.45)}
.card.dragging{cursor:grabbing;z-index:5}
.card.new{animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(79,209,197,.0),0 6px 20px rgba(0,0,0,.35)}50%{box-shadow:0 0 0 3px rgba(79,209,197,.5),0 6px 20px rgba(0,0,0,.35)}}
.card .ttl{font-weight:600;font-size:14px;line-height:1.25;margin-bottom:6px;word-break:break-word}
.card .sub{font-family:ui-monospace,Menlo,monospace;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}
.card .meta{display:flex;gap:6px;align-items:center;margin-top:8px;flex-wrap:wrap}
.chip{font-family:ui-monospace,Menlo,monospace;font-size:10px;font-weight:700;padding:2px 6px;border-radius:5px}
.chip.P0{background:#ef4444;color:#fff}.chip.P1{background:#f5a623;color:#1a1205}
.chip.P2{background:#2a3445;color:#cdd5e1}.chip.P3{background:#1a212d;color:#8d99ab}
.chip.st{background:#10202a;color:var(--cyan)}
.chip.cd{background:#221a10;color:var(--amber)}
/* port handle for wiring */
.port{position:absolute;right:-9px;top:50%;transform:translateY(-50%);width:18px;height:18px;border-radius:50%;
  background:var(--bg2);border:1.5px solid var(--cyan);display:flex;align-items:center;justify-content:center;color:var(--cyan);font-size:11px;cursor:crosshair}
.port:hover{background:var(--cyan);color:#04201d}

/* edges */
.edge{fill:none;stroke:var(--cyan);stroke-width:2}
.edge.relationship{stroke:var(--amber)}
.edge.temp{stroke:var(--soft);stroke-dasharray:5 4}
.elabel{position:absolute;transform:translate(-50%,-50%);background:var(--bg2);border:1px solid var(--line);
  border-radius:20px;padding:3px 9px;font-size:11px;color:var(--soft);white-space:nowrap;pointer-events:auto;cursor:pointer}
.elabel.relationship{border-color:var(--amber);color:var(--amber);font-family:ui-monospace,Menlo,monospace}

/* side panels */
aside{position:fixed;top:52px;right:0;bottom:0;width:320px;background:var(--panel);border-left:1px solid var(--line);
  padding:18px;overflow:auto;z-index:15;display:flex;flex-direction:column;gap:12px}
.insp-head{display:flex;align-items:center;justify-content:space-between}
.insp-title{font-weight:700}
.x{background:none;border:none;color:var(--soft);font-size:16px}
aside label{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--soft)}
.row{display:flex;gap:10px}.row label{flex:1}
.facets summary{cursor:pointer;color:var(--soft);font-size:12px}
.insp-actions{display:flex;gap:10px;margin-top:6px}
.insp-actions .btn{flex:1;text-align:center}

/* digest */
#digBody .dgroup{margin-bottom:16px}
#digBody h4{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--cyan);margin-bottom:8px}
#digBody .di{background:var(--bg2);border:1px solid var(--line);border-radius:9px;padding:9px 11px;margin-bottom:7px}
#digBody .di small{color:var(--faint)}
#digBody .empty{color:var(--faint);font-size:13px}

.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--cyan);color:#04201d;
  font-weight:700;padding:10px 16px;border-radius:10px;z-index:60}