:root{
  --bg:#0e1420; --panel:#16202f; --panel2:#1c2739; --line:#2c3a52;
  --ink:#dfe8f5; --dim:#8fa3bf; --accent:#4ea3ff;
  --hot:#ff4d4d; --hot2:#ff8080; --pc:#ffd23f; --ok:#3ddc84;
  --exec:#7fc4ff; --cycle:#ffc46b; --micro:#9adba0;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
     font:13px/1.35 "Segoe UI",system-ui,sans-serif}
h2{margin:0 0 6px;font-size:12px;letter-spacing:.12em;color:var(--dim);
   font-weight:600;text-transform:uppercase}

/* ---------------- barra ---------------- */
#bar{display:flex;gap:14px;align-items:center;flex-wrap:wrap;
     padding:8px 12px;background:linear-gradient(#1b2637,#141d2b);
     border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
button{font:inherit;color:var(--ink);background:#22314a;border:1px solid var(--line);
       border-radius:5px;padding:5px 10px;cursor:pointer}
button:hover{background:#2b3d5c}
button.on{background:var(--accent);color:#08111c;border-color:var(--accent);font-weight:600}
.menu{position:relative}
.menu-pop{display:none;position:absolute;top:110%;left:0;background:var(--panel2);
          border:1px solid var(--line);border-radius:6px;padding:5px;min-width:190px;z-index:30}
.menu-pop.open{display:block}
.menu-pop button{display:block;width:100%;text-align:left;margin:2px 0;background:transparent;border:0}
.menu-pop button:hover{background:#2b3d5c}
.runmode{display:flex;gap:6px}
.settings{display:flex;gap:12px;align-items:center;color:var(--dim)}
.settings select,.settings input{background:#1a2434;color:var(--ink);
     border:1px solid var(--line);border-radius:4px;padding:3px 5px;font:inherit}
.status{margin-left:auto;font-family:ui-monospace,Consolas,monospace;color:var(--dim)}
.status b{color:var(--ink)}

/* ---------------- griglia ---------------- */
main{display:grid;grid-template-columns:minmax(560px,1.55fr) minmax(280px,.85fr);
     grid-template-rows:auto auto;gap:10px;padding:10px;align-items:start}
.mimic{grid-column:1;background:var(--panel);border:1px solid var(--line);
       border-radius:8px;padding:10px 12px 8px}
.side{grid-column:2;display:flex;flex-direction:column;gap:10px}
.bottom{grid-column:1/-1;display:grid;grid-template-columns:1.15fr .85fr;gap:10px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px}

/* ---------------- blocchi del datapath ---------------- */
.row{display:flex;gap:8px;align-items:stretch;margin-bottom:6px;flex-wrap:wrap}
.box{position:relative;background:var(--panel2);border:2px solid var(--line);
     border-radius:6px;padding:4px 8px;min-width:66px;transition:.12s}
.box .lbl{display:block;font-size:10px;letter-spacing:.1em;color:var(--dim)}
.box .val,.box .sub{font-family:ui-monospace,Consolas,monospace;font-size:14px}
.box.cu,.box.alu{min-width:120px;min-height:52px}
.box.alu .sub{font-size:11px;color:var(--dim)}
.box.pc{border-color:#3b4a63}
.stack{display:flex;gap:8px}
.regs16 .box{min-width:84px}
.flags{display:flex;gap:5px;align-items:center;min-width:150px}
.flags .lbl{margin-right:4px}
.fl{display:inline-block;min-width:20px;text-align:center;padding:1px 3px;border-radius:3px;
    background:#111a26;border:1px solid var(--line);font-family:ui-monospace,monospace;color:var(--dim)}
.fl.on{background:var(--ok);color:#05210f;border-color:var(--ok);font-weight:700}

/* bus */
.buses{display:flex;gap:10px;margin:7px 0}
.bus{flex:1;display:flex;justify-content:space-between;align-items:center;
     background:repeating-linear-gradient(90deg,#1a2434 0 12px,#16202f 12px 24px);
     border:2px solid var(--line);border-radius:4px;padding:4px 10px;
     font-family:ui-monospace,monospace;letter-spacing:.08em;color:var(--dim)}
.bus i{font-style:normal;color:var(--ink)}

/* segnali */
.signals{display:flex;gap:6px;margin-left:auto;align-items:center}
.sig{padding:4px 9px;border-radius:4px;background:#111a26;border:1px solid var(--line);
     color:var(--dim);font-family:ui-monospace,monospace;font-size:11px}
.sig.on{background:#123;border-color:var(--ok);color:var(--ok);box-shadow:0 0 8px #3ddc8455}

/* evidenziazione del transito (rosso come l'oracolo) */
.hot{border-color:var(--hot)!important;background:#3a1418!important;
     box-shadow:0 0 0 1px var(--hot),0 0 14px #ff4d4d66;color:#ffd7d7}
.hot .val,.hot .lbl{color:#ffd7d7}

.curinstr{margin-top:8px;padding:6px 10px;border:1px dashed var(--line);border-radius:6px;
          font-family:ui-monospace,Consolas,monospace;font-size:13px;color:var(--dim)}
.curinstr b{color:var(--pc);font-weight:600;margin-left:6px}
.legend{margin:6px 0 2px;font-size:11px;color:var(--dim)}
.irqbar{display:flex;gap:6px;margin-top:6px}
.irq{background:#2a1f2a;border-color:#4a3346}
.irq:hover{background:#3b2a39}

/* ---------------- memoria ---------------- */
.memgrid{font-family:ui-monospace,Consolas,monospace;font-size:11px;line-height:1.3}
.mrow{display:flex;gap:8px;padding:1px 3px;border-radius:3px}
.mrow .addr{color:var(--dim)}
.mrow .bytes{white-space:pre}
.mrow .asc{color:#7f8ea6}
.mrow.pc{background:#3a3413;outline:1px solid var(--pc)}
.mbyte.hl{background:var(--hot);color:#fff;border-radius:2px}
.memgrid input{background:#1a2434;color:var(--ink);border:1px solid var(--line);
               border-radius:3px;padding:1px 4px;font:inherit;width:52px}

/* ---------------- porte ---------------- */
.ports{display:grid;grid-template-columns:repeat(6,1fr);gap:3px;max-height:180px;overflow:auto;
       font-family:ui-monospace,monospace;font-size:11px}
.port{background:#131c29;border:1px solid #22304a;border-radius:3px;padding:2px 4px;
      display:flex;justify-content:space-between;gap:4px}
.port b{color:var(--dim);font-weight:500}
.port.named{border-color:#2f4a63}
.port.named b{color:var(--accent)}

/* ---------------- trace / disasm / micro ---------------- */
.tabbar{display:flex;gap:6px;margin-bottom:6px}
.tab{background:#1a2434}
.tab.on{background:var(--accent);color:#08111c;font-weight:600}
.tabbody{min-height:130px;max-height:200px;overflow:auto;
         font-family:ui-monospace,Consolas,monospace;font-size:12px}
#lstPre{margin:0;padding:2px 4px;white-space:pre;font:12px/1.35 ui-monospace,Consolas,monospace;
         color:var(--dim)}
.hidden{display:none}
.line{display:flex;gap:10px;padding:1px 4px;border-radius:3px}
.line .a{color:var(--pc)}
.line .b{color:var(--dim);min-width:74px}
.line.cur{background:#1d2b3f;outline:1px solid #2f4a63}

.microlist{max-height:210px;overflow:auto;font-family:ui-monospace,Consolas,monospace;font-size:12px}
.mi{display:flex;gap:8px;padding:1px 3px}
.mi .lvl{min-width:44px;font-size:10px;letter-spacing:.05em;padding-top:2px}
.mi .lvl.EXEC{color:var(--exec)} .mi .lvl.CYCLE{color:var(--cycle)} .mi .lvl.MICRO{color:var(--micro)}
.mi.new{background:#233247;border-radius:3px}