:root{--ui-bg:#0f172a;--panel:#0b1220;--accent:#7dd3fc;--muted:#9aa7bf}
html,body{height:100%;margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Arial;color:#e6eef8;background:linear-gradient(180deg,#071029 0%, #081525 100%)}
.app{max-width:1100px;margin:28px auto;padding:20px;border-radius:12px;background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);box-shadow:0 6px 30px rgba(2,6,23,0.6)}
h1{margin:0 0 10px;font-size:20px}
.top{display:flex;gap:16px;align-items:center}
.panel{background:rgba(255,255,255,0.02);padding:12px;border-radius:10px}
.controls{display:flex;gap:10px;flex-wrap:wrap}
label{font-size:13px;color:var(--muted)}
input[type=number]{width:72px;padding:6px;border-radius:6px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:inherit}
button{background:var(--accent);border:none;padding:8px 10px;border-radius:8px;color:#02243a;cursor:pointer}
button.secondary{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--muted)}
.layout{display:flex;gap:18px;margin-top:16px}
.left{flex:0 0 auto}
.right{flex:1;min-width:320px}
canvas{image-rendering:pixelated;border:1px solid rgba(255,255,255,0.04);background:#fff;}
.preview{display:inline-block;padding:8px;background:rgba(0,0,0,0.35);border-radius:8px}
textarea{width:100%;height:160px;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:inherit;font-family:monospace}
.row{display:flex;gap:8px;align-items:center}
.help{font-size:13px;color:var(--muted);margin-top:8px}
.tools{display:flex;gap:8px}
.small{padding:6px 8px;font-size:13px}
.footer{font-size:13px;color:var(--muted);margin-top:10px}