* {outline:0;box-sizing:border-box;}
:root{--bg:#0f1724;--card:#0b1220;--muted:#9aa4b2;--accent:#06b6d4}
html,body{height:100%;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,"Helvetica Neue",Arial}
body{background:linear-gradient(180deg,#071029 0%, #081226 100%);color:#e6eef6;display:flex;gap:20px;align-items:flex-start;padding:28px;}
.app{max-width:1100px;width:100%;margin:0 auto;display:grid;grid-template-columns:360px 1fr;gap:20px}
.card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));border-radius:12px;padding:16px;box-shadow:0 6px 18px rgba(2,6,23,0.6);border:1px solid rgba(255,255,255,0.03)}
h1{font-size:18px;margin:0 0 12px}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.controls{display:flex;flex-direction:column;gap:12px}
input[type=range]{width:100%}
.row{display:flex;gap:8px;align-items:center}
.palette{display:grid;grid-template-columns:repeat(10,1fr);gap:6px;flex-wrap:wrap}
.swatch{width:28px;height:28px;border-radius:6px;border:1px solid rgba(0,0,0,0.25);cursor:pointer}
button{background:transparent;border:1px solid rgba(255,255,255,0.06);padding:8px 10px;border-radius:8px;color:inherit;cursor:pointer}
.tools{display:grid;gap:1px;grid-template-columns:repeat(4,1fr);}
.tools button.active{outline:2px solid rgba(6,182,212,0.25);box-shadow:0 4px 18px rgba(6,182,212,0.08)}
canvas {cursor:crosshair}
.canvas-wrap{display:flex;justify-content:center;align-items:center;flex-direction:column;gap:10px}
#gridCanvas{background:linear-gradient(90deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));border-radius:8px;image-rendering:pixelated}
.meta{display:flex;gap:12px;align-items:center}
.small{font-size:13px;color:var(--muted)}
.footer-actions{display:flex;gap:8px;flex-wrap:wrap}
@media (max-width:880px){
    body{padding:12px}
    .app{grid-template-columns:1fr;}
}