*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f2f2f2;color:#222}
header{background:#111827;color:#fff;padding:1rem 1.5rem}
header h1{margin:0;font-size:1.35rem}
.subtitle{margin:.25rem 0 0;opacity:.85;font-size:.9rem}
.layout{display:grid;grid-template-columns:340px 1fr;gap:1rem;padding:1rem;align-items:start}
.controls,.visual{background:#fff;border-radius:10px;box-shadow:0 1px 6px rgba(0,0,0,.08)}
.controls{padding:1rem}
.controls h2{margin:.75rem 0 .25rem;font-size:1rem;border-bottom:1px solid #e5e7eb;padding-bottom:.25rem;color:#0f172a}
label{display:block;font-size:.86rem;margin-top:.65rem;color:#111827}
input{width:100%;padding:.45rem .5rem;margin-top:.18rem;border:1px solid #cbd5e1;border-radius:8px;font-size:.95rem}
input:focus{outline:2px solid rgba(37,99,235,.35);border-color:#2563eb}
.layerMeta{margin-top:.2rem;display:flex;flex-direction:column;gap:.35rem}
.pill{display:inline-block;padding:.15rem .45rem;border-radius:999px;background:#f1f5f9;color:#0f172a;font-size:.75rem;margin-right:.25rem}
.pill.strong{background:#e0f2fe}
.hint{font-size:.78rem;color:#475569}
.buttons{display:grid;grid-template-columns:repeat(2,1fr);gap:.5rem;margin-top:1rem}
button{padding:.55rem .6rem;font-size:.88rem;border-radius:10px;border:1px solid #cbd5e1;background:#fff;cursor:pointer}
button:hover{background:#f8fafc}
button:disabled{opacity:.5;cursor:not-allowed}
button.primary{grid-column:span 2;background:#2563eb;color:#fff;border:none}
button.primary:hover{background:#1d4ed8}
.error{min-height:1.1rem;margin-top:.8rem;color:#b91c1c;font-size:.85rem}
.visual{padding:.85rem}
canvas{display:block;margin:0 auto;border:1px solid #e5e7eb;border-radius:10px;background:#000}
.progress{margin-top:.8rem}
.progress-bar{height:18px;background:#e5e7eb;border-radius:999px;overflow:hidden}
#progressFill{height:100%;width:0%;background:#2563eb;transition:width .12s linear}
#status{margin-top:.35rem;font-size:.82rem;color:#475569}
footer{text-align:center;padding:.6rem;font-size:.75rem;color:#64748b}
@media (max-width: 980px){.layout{grid-template-columns:1fr}canvas{width:100%;height:auto}}