:root{
  --bg:#0b1220; --panel:#0f1b31; --ink:#eaf1ff; --muted:#a8b0c6; --brand:#5aa2ff;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial}
.app{max-width:1100px;margin:0 auto;padding:12px}
header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand .logo{width:28px;height:28px;border-radius:8px;background:linear-gradient(180deg,#7bb2ff,#3b82f6);display:grid;place-items:center}
.brand .logo svg{width:18px;height:18px;fill:#fff}

.toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(0,0,0,.1));border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:8px}
.group{display:flex;gap:6px;align-items:center;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:6px}
button, select, input[type="color"], input[type="range"], input[type="number"]{background:#14213b;color:var(--ink);border:1px solid rgba(255,255,255,.2);border-radius:8px;padding:6px 8px}
button{cursor:pointer}
button.primary{background:linear-gradient(180deg,#7bb2ff,#3b82f6);color:white;border:0;box-shadow:0 8px 14px rgba(59,130,246,.35)}
button.tog[aria-pressed="true"]{outline:2px solid #7bb2ff}
input.num, .num{width:64px}

.stage{position:relative;margin-top:10px;background:var(--panel);border:1px solid rgba(255,255,255,.12);border-radius:14px;overflow:hidden}
canvas{display:block;width:100%;height:auto;background:#0e1730}
.grid{position:absolute;inset:0;pointer-events:none;background-size:32px 32px;background-image:linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);}
.grid.hidden{display:none}

.footer{display:flex;justify-content:space-between;align-items:center;margin-top:8px;color:var(--muted);font-size:12px}

@media (max-width:640px){
  .toolbar{gap:6px}
  .group{padding:4px}
  button, select, input{font-size:14px}
}