:root{
  --bg:#f3f2ee; --panel:#ffffff; --line:#e2e0d9; --text:#1d1d1f; --dim:#6d6d72;
  --accent:#e4572e; --accent-ink:#ffffff; --radius:10px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);
  font:14px/1.5 "Segoe UI","PingFang TC","Microsoft JhengHei",sans-serif;display:flex;flex-direction:column}
h2{font-size:13px;letter-spacing:.5px;margin:0 0 10px;color:var(--dim);font-weight:600}
button,input,select,textarea{font:inherit;color:inherit}

.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 20px;
  background:var(--panel);border-bottom:1px solid var(--line)}
.brand{font-weight:700;font-size:16px;letter-spacing:.5px}
.steps{display:flex;gap:18px;margin:0;padding:0;list-style:none;counter-reset:s;color:var(--dim);font-size:13px}
.steps li{counter-increment:s}
.steps li::before{content:counter(s);display:inline-grid;place-items:center;width:18px;height:18px;margin-right:6px;
  border-radius:50%;background:var(--text);color:#fff;font-size:11px}

.layout{flex:1;min-height:0;display:grid;grid-template-columns:300px minmax(0,1fr) 300px}
.panel{background:var(--panel);overflow-y:auto;padding:16px}
#toolPanel{border-right:1px solid var(--line)}
#orderPanel{border-left:1px solid var(--line)}
.panel section{padding-bottom:16px;margin-bottom:16px;border-bottom:1px solid var(--line)}
.panel section:last-child{border-bottom:0;margin-bottom:0}

.drop{display:grid;place-items:center;min-height:72px;padding:12px;text-align:center;cursor:pointer;
  border:1.5px dashed #bdbab0;border-radius:var(--radius);color:var(--dim);background:#faf9f6;overflow-wrap:anywhere}
.drop:hover,.drop.over{border-color:var(--accent);color:var(--accent)}

.tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.tabs button,.seg button{border:1px solid var(--line);background:#fff;padding:8px 6px;border-radius:8px;cursor:pointer}
.tabs button.on,.seg button.on{background:var(--text);border-color:var(--text);color:#fff}
.seg{display:inline-flex;gap:4px}
.seg button{min-width:44px}
.hint{color:var(--dim);font-size:12.5px;margin:8px 0}

.ctl{margin:12px 0}
.ctl-head{display:flex;justify-content:space-between;align-items:center;gap:8px}
.ctl-head output{color:var(--dim);font-variant-numeric:tabular-nums}
.ctl input[type=range]{width:100%;margin:6px 0 0;accent-color:var(--accent)}
.ctl select{width:100%;margin-top:4px;padding:7px 8px;border:1px solid var(--line);border-radius:8px;background:#fff}
.ctl input[type=color]{width:44px;height:30px;padding:2px;border:1px solid var(--line);border-radius:6px;background:#fff}
.ctl.check label{display:flex;gap:8px;align-items:flex-start;cursor:pointer}
.ctl.check input{margin-top:3px;accent-color:var(--accent)}

.btn{border:1px solid var(--line);background:#fff;padding:8px 12px;border-radius:8px;cursor:pointer}
.btn:hover{border-color:#b9b6ab}
.btn.wide{width:100%}
.btn.primary{width:100%;padding:12px;background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600;font-size:15px}
.btn:disabled{opacity:.5;cursor:default}
.row-btns{display:flex;gap:6px;flex-wrap:wrap}

.stage{display:flex;flex-direction:column;min-width:0;min-height:0}
.stage-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;flex-wrap:wrap}
.swatches{display:flex;gap:8px}
.swatches button{width:28px;height:28px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px #b9b6ab;cursor:pointer;padding:0}
.swatches button.on{box-shadow:0 0 0 2px var(--accent)}
.shirt-wrap{flex:1;min-height:0;overflow:hidden;display:grid;place-items:center;padding:8px}
.shirt{position:relative;aspect-ratio:600/660;height:100%;max-height:660px;max-width:100%;
  transform-origin:50% 41.1%;transition:transform .25s ease}
.stage.zoom .shirt{transform:scale(2.05)}
.shirt svg{position:absolute;inset:0;width:100%;height:100%;filter:drop-shadow(0 6px 14px rgba(0,0,0,.12))}
.print{position:absolute;left:39%;top:26.97%;width:22%;height:28.28%;overflow:hidden;
  outline:1px dashed var(--guide,rgba(0,0,0,.35));touch-action:none;cursor:grab}
.print.dragging{cursor:grabbing}
.print canvas{position:absolute;display:none;pointer-events:none}
.print-empty{position:absolute;inset:0;display:grid;place-items:center;text-align:center;font-size:10px;
  color:var(--guide,rgba(0,0,0,.45));pointer-events:none}
.status{min-height:28px;padding:4px 16px 10px;text-align:center;color:var(--dim);font-size:12.5px}

.field{margin-bottom:10px}
.field .lbl{display:block;margin-bottom:4px;color:var(--dim);font-size:12.5px}
.field input,.field textarea{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:#fff}
.field input:focus,.field textarea:focus,.ctl select:focus{outline:2px solid var(--accent);outline-offset:-1px}
.summary{margin:14px 0 6px;padding:10px 12px;background:#faf9f6;border-radius:var(--radius);display:grid;
  grid-template-columns:1fr auto;gap:4px 12px}
.summary dt{color:var(--dim)}
.summary dd{margin:0;text-align:right;font-variant-numeric:tabular-nums}
.summary .total{font-weight:700;font-size:16px;color:var(--text)}
.error{color:#c0281b;min-height:1.2em;margin:6px 0}

dialog{border:0;border-radius:14px;padding:22px;max-width:min(560px,92vw);box-shadow:0 20px 60px rgba(0,0,0,.3)}
dialog::backdrop{background:rgba(0,0,0,.45)}
dialog h3{margin:0 0 6px;font-size:18px}
dialog .orderno{font-size:22px;font-weight:700;letter-spacing:1px;margin:6px 0 12px}
dialog .files{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px;margin:12px 0}
dialog .files a{display:block;text-align:center;font-size:12px;color:var(--text);text-decoration:none;overflow-wrap:anywhere}
dialog .files img{display:block;width:100%;aspect-ratio:1;object-fit:contain;border:1px solid var(--line);border-radius:8px;
  background:repeating-conic-gradient(#eee 0 25%,#fff 0 50%) 0 0/16px 16px;margin-bottom:4px}
dialog .demo{background:#fff6dc;border-radius:8px;padding:8px 10px;font-size:12.5px}

@media (max-width:900px){
  body{display:block}
  .layout{display:flex;flex-direction:column}
  .stage{order:-1}
  .steps{display:none}
  .panel{overflow:visible;border:0!important;border-top:1px solid var(--line)!important}
  .stage{position:sticky;top:0;z-index:2;background:var(--bg);height:56vh}
}