.app{width: min(1280px, calc(100% - 32px));margin: 22px auto 20px;background:#fffdf8;border:1px solid #e2d8c8;border-radius:14px;box-shadow:0 8px 30px rgba(20,30,50,.08);display:flex;flex-direction:column;overflow:}
.intro{padding: 16px 18px 12px;}
h1{font-size: 20px; margin: 0 0 5px;}
.intro p {
    color: var(--muted);
    font-size: 13px;
    margin: 0;
}
.panel{width:1240px;margin:20px auto 20px;background:#fffdf8;border:1px solid #e2d8c8;border-radius:8px;box-shadow:0 2px 8px #0000000a;overflow:hidden}
.toolbar{padding:16px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;border-bottom:1px solid var(--line);background:#fff}
button,.btn,select,input{font:inherit}
button,.btn{background:#c45c26;border-radius:7px;padding:9px 13px;cursor:pointer;color:#fff;display:inline-flex;align-items:center;justify-content:center;gap:7px}
button:hover,.btn:hover{background:#9a4014}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover{background:#9a4014}
button:disabled{opacity:.45;cursor:not-allowed}
input[type=file]{display:none}
.field{display:flex;align-items:center;gap:7px;color:#454951;font-size:14px}
select,input[type=number]{border:1px solid #cbd0d8;border-radius:7px;padding:8px;background:#fff;width:82px}
input[type=number]{width:90px}
.workspace{display:grid;grid-template-columns:minmax(0,1fr) 280px;min-height:430px}
.stage{padding:18px;background:#f1f2f4;display:flex;align-items:center;justify-content:center;min-width:0;min-height:430px}
.canvas-wrap{position:relative;display:inline-block;max-width:100%;line-height:0;touch-action:none;user-select:none}
#sourceCanvas{display:block;max-width:100%;max-height:68vh;width:auto;height:auto}
#selection{position:absolute;border:2px solid #fff;outline:1px solid #1769e0;cursor:move;display:none;touch-action:none;z-index:3}
#selection:before{content:"";position:absolute;pointer-events:none;z-index:-1;left:calc(-1 * var(--mask-left, 0px));top:calc(-1 * var(--mask-top, 0px));width:var(--mask-width, 0px);height:var(--mask-height, 0px);box-shadow:0 0 0 0 transparent}
.mask-layer{position:absolute;inset:0;pointer-events:none;z-index:2;display:none}
.mask-part{position:absolute;background:rgba(0,0,0,.48)}
.handle{position:absolute;width:12px;height:12px;background:#fff;border:2px solid var(--accent);border-radius:50%;z-index:2}
.handle.nw{left:-6px;top:-6px;cursor:nwse-resize}.handle.ne{right:-6px;top:-6px;cursor:nesw-resize}.handle.sw{left:-6px;bottom:-6px;cursor:nesw-resize}.handle.se{right:-6px;bottom:-6px;cursor:nwse-resize}
.empty{max-width:320px;text-align:center;color:var(--muted);line-height:1.7}.empty .big{font-size:44px;margin-bottom:8px}
.side{padding:18px;border-left:1px solid var(--line)}.side h2{font-size:17px;margin:0 0 14px}
.control{margin-bottom:17px}.control label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.dimensions{display:flex;gap:8px;align-items:center}.dimensions input{min-width:0;width:50%;}.hint{font-size:12px;color:var(--muted);margin-top:6px}
.preview{background:repeating-conic-gradient(#e9ebef 0% 25%,#fff 0% 50%) 50%/18px 18px;border:1px solid var(--line);border-radius:7px;min-height:145px;display:flex;align-items:center;justify-content:center;overflow:hidden}
#previewCanvas{max-width:100%;max-height:220px;display:block}
.download-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}.download-row select{width:100%;min-width:0}
.footer-note{padding:13px 16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
[hidden] { display: none !important; }
@media(max-width:760px){
.panel, .examples{width: min(760px, calc(100% - 32px)); margin: 20px auto 20px; }
}
@media(max-width:420px){
.panel, .examples{width: min(420px, calc(100% - 20px)); margin: 20px auto 20px; }
}
@media(max-width:760px){main{margin:20px auto}.workspace{grid-template-columns:1fr}.stage{min-height:300px;padding:12px}#sourceCanvas{max-height:52vh}.side{border-left:0;border-top:1px solid var(--line)}h1{font-size:24px}.toolbar{gap:8px}.field{flex-wrap:wrap}}