.std-wrap{display:grid;grid-template-columns:1fr 320px;gap:16px;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;}
.std-left{display:flex;flex-direction:column;gap:12px}
.std-right{display:flex;flex-direction:column;gap:12px}
.std-shirt{position:relative;display:inline-block;background:var(--shirt-color,#0f172a);border-radius:14px;padding:20px;box-shadow:0 6px 18px rgba(0,0,0,.15);}
.std-shirt-neck{position:absolute;top:8px;left:50%;transform:translateX(-50%);width:120px;height:36px;background:#111827;border-radius:0 0 60px 60px;opacity:.2}
#std-canvas{background:#fff;border-radius:8px;display:block;margin:auto}
.std-actions{display:flex;flex-wrap:wrap;gap:8px}
.std-btn{border:1px solid #1f2937;padding:8px 12px;border-radius:8px;background:#111827;color:#fff;cursor:pointer}
.std-btn:hover{opacity:.9}
.std-panel{border:1px solid #e5e7eb;border-radius:12px;padding:12px;background:#fff}
.std-panel h4{margin:0 0 8px 0}
#std-layers{min-height:40px;border:1px dashed #e5e7eb;border-radius:8px;padding:6px;font-size:12px;color:#6b7280}
.std-file-btn{display:inline-flex;align-items:center;gap:8px}
label{display:flex;flex-direction:column;gap:6px;margin-bottom:8px}