:root{--bg:#f6f7f9;--card:#fff;--text:#1d2330;--muted:#6b7280;--accent:#2f6fed;--border:#e2e5ea;--radius:10px;--font:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
*{box-sizing:border-box}body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text)}
header,main{max-width:1200px;margin:0 auto;padding:16px}h1{margin:.2em 0;font-size:1.6rem}.muted{color:var(--muted);font-size:.9rem}
#drop{display:block;border:2px dashed var(--border);border-radius:var(--radius);background:var(--card);padding:28px;text-align:center;cursor:pointer}
#drop.over{border-color:var(--accent)}#file{display:none}
.controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:12px;margin:12px 0;position:sticky;top:0;z-index:5}
.controls label{display:flex;gap:6px;align-items:center;font-size:.9rem}
button,.btn{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:8px 12px;font-size:.9rem;cursor:pointer}
button.secondary{background:#eef1f6;color:var(--text)}
select,input{font-size:16px}
h2{margin:24px 0 8px;font-size:1.2rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:10px;display:flex;flex-direction:column;gap:6px}
.card h3{margin:0;font-size:.95rem}.card .dims{color:var(--muted);font-size:.8rem}
.pv{position:relative;background:#eef1f6;border-radius:6px;overflow:hidden;touch-action:none;cursor:grab;display:flex;justify-content:center;align-items:center;height:180px}
.pv canvas{max-width:100%;max-height:180px;width:auto;height:auto;display:block;box-shadow:0 0 0 1px var(--border);background:repeating-conic-gradient(#ddd 0 25%,#fff 0 50%) 0 0/12px 12px}
.pv .safe{position:absolute;pointer-events:none}
.row{display:flex;gap:6px;align-items:center;flex-wrap:wrap;font-size:.8rem}.row input[type=range]{flex:1}
.hidden{display:none}
@media (max-width:600px){.controls{position:static}}
.sel{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto}button:disabled{opacity:.45;cursor:not-allowed}
.sechead{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.sechead h2{margin-right:auto}.sechead button{padding:4px 10px;font-size:.8rem}
.pick{display:flex;gap:6px;align-items:center;font-size:.85rem;font-weight:600}.pick input,.files input{width:18px;height:18px}
.files{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:4px;font-size:.8rem}.files label{display:flex;gap:4px;align-items:center}