:root{
  --bg:#eef3f5;
  --panel:#fbfdfd;
  --panel-soft:#f5f8f8;
  --panel-tint:#f2f7f6;
  --border:#d6e0e2;
  --border-strong:#becdd0;
  --text:#1f2d33;
  --muted:#62737a;
  --muted-2:#8b9aa0;
  --primary:#0f766e;
  --primary-hover:#0b625b;
  --primary-soft:#e7f5f3;
  --accent:#d4a24c;
  --shadow:0 3px 14px rgba(29,55,61,.06);
  --shadow-lg:0 18px 48px rgba(29,55,61,.18);
}
*{box-sizing:border-box}
html,body,#root{height:100%;margin:0}
body{font-family:Inter,Segoe UI,Microsoft YaHei,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;font-size:13px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
button,input,select{font:inherit}
.app{display:grid;grid-template-columns:292px minmax(0,1fr);height:100vh;overflow:hidden;background:var(--bg)}
.left-panel{display:block!important;min-height:0;padding:12px 12px 14px!important;background:linear-gradient(180deg,#f9fbfb 0%,#edf3f3 100%);border-right:1px solid var(--border);overflow-y:auto;scrollbar-width:thin}
.left-panel > .panel-section{margin-bottom:8px}
.center{display:flex;flex-direction:column;min-width:0;overflow:hidden;background:var(--panel-soft)}
.right-panel{display:none!important}
.panel-section{margin:0 0 12px;padding:13px;border:1px solid var(--border);border-radius:12px;background:rgba(255,255,255,.9);box-shadow:var(--shadow)}
.panel-section:last-child{margin-bottom:0}
.panel-section h2{font-size:11px;letter-spacing:.08em;color:#456168;margin:0 0 9px;display:flex;align-items:center;justify-content:space-between;font-weight:750;text-transform:none}
.hint{color:var(--muted-2);font-size:11px;line-height:1.5;margin:6px 0 0}
.box-select{width:100%;min-height:36px;padding:7px 10px;border:1px solid var(--border-strong);border-radius:9px;font-size:13px;background:#fff;color:var(--text);outline:none;transition:border-color .15s,box-shadow .15s,background .15s}
.box-select:focus{border-color:#74b9b3;box-shadow:0 0 0 3px rgba(15,118,110,.12)}
.material-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.chip{padding:7px 8px;border:1px solid var(--border);border-radius:9px;background:var(--panel-tint);font-size:12px;cursor:pointer;color:#395159;transition:.15s}
.chip:hover{border-color:#99bbb8;background:#fff}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 3px 10px rgba(15,118,110,.18)}
.num-field{display:flex;align-items:center;gap:7px;padding:4px 0}
.num-field span{width:78px;flex:none;color:#3c525a;line-height:1.25}
.num-field input{flex:1;min-width:0;min-height:34px;padding:7px 9px;border:1px solid var(--border-strong);border-radius:9px;font-size:13px;color:var(--text);background:#fff;outline:none;transition:border-color .15s,box-shadow .15s,background .15s}
.num-field input:focus{border-color:#74b9b3;box-shadow:0 0 0 3px rgba(15,118,110,.12)}
.num-field em{font-style:normal;color:var(--muted-2);font-size:11px;width:25px;flex:none}
.num-field.disabled input{background:#edf1f2;color:#98a2a6}
.topbar{display:flex;align-items:center;gap:8px;min-height:58px;padding:9px 16px;background:rgba(251,253,253,.96);border-bottom:1px solid var(--border);box-shadow:0 1px 4px rgba(29,55,61,.04);z-index:3;flex-wrap:wrap;backdrop-filter:blur(8px)}
.topbar .title{font-weight:780;font-size:15px;color:#1d4b4d;letter-spacing:-.015em;white-space:nowrap;position:relative;padding-right:10px}
.topbar .title:after{content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);width:4px;height:18px;border-radius:999px;background:var(--accent);opacity:.85}
.topbar-size{color:var(--muted);font-size:12px;margin-right:auto;white-space:nowrap}
.topbar .btn{white-space:nowrap}
.btn{min-height:34px;padding:7px 11px;border:1px solid var(--border-strong);border-radius:9px;background:#fff;font-size:12px;cursor:pointer;color:#38505a;transition:border-color .15s,background .15s,box-shadow .15s,transform .05s,color .15s}
.btn:hover:not(:disabled){border-color:#9ab6b3;background:#f9fcfc;box-shadow:0 2px 7px rgba(29,55,61,.06);color:#20474a}
.btn:active:not(:disabled){transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 3px 9px rgba(15,118,110,.18)}
.btn.active:hover:not(:disabled){background:var(--primary-hover);border-color:var(--primary-hover)}
.btn-primary{background:linear-gradient(135deg,#128278,#0f766e);border-color:#0f766e;color:#fff;width:100%;padding:9px 12px;margin-bottom:8px;font-weight:700;min-height:39px;box-shadow:0 4px 11px rgba(15,118,110,.14)}
.btn-primary:hover:not(:disabled){background:linear-gradient(135deg,#0f766e,#0b625b);border-color:#0b625b;box-shadow:0 6px 14px rgba(15,118,110,.18)}
.viewport{flex:1;position:relative;overflow:hidden;background:radial-gradient(circle at 50% 42%,#ffffff 0,#f6faf9 48%,#edf4f3 100%);cursor:grab;touch-action:none}
.viewport:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(120deg,rgba(15,118,110,.025),transparent 36%,rgba(212,162,76,.028));}
.net-svg{display:block}
.viewport-empty{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:var(--muted-2)}
.layer-row{display:flex;align-items:center;gap:8px;padding:5px 0;font-size:12px}.layer-row em{margin-left:auto;font-style:normal;color:var(--muted-2);font-size:11px}.layer-row.muted{color:var(--muted-2)}
.swatch{width:14px;height:14px;border-radius:4px;border:1px solid rgba(0,0,0,.08);flex:none}.sw-cut{background:#24363b}.sw-crease{background:#b84d62}.sw-teeth{background:#c99838}.sw-gray{background:#b9c6ca}
.stat-row{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed var(--border);font-size:12px}.stat-row span{color:var(--muted)}.stat-row strong{font-variant-numeric:tabular-nums}
.viewport.panning{cursor:grabbing}
.modal-overlay{position:fixed;inset:0;background:rgba(17,36,40,.58);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}
.modal-card{background:#fbfdfd;border-radius:18px;padding:26px;min-width:440px;max-width:720px;box-shadow:var(--shadow-lg);position:relative;border:1px solid rgba(255,255,255,.72)}
.modal-card h3{margin:0 0 18px;font-size:19px;color:#23484a;text-align:center;font-weight:780}
.modal-close{position:absolute;top:12px;right:12px;background:#f1f6f5;border:1px solid var(--border);width:34px;height:34px;border-radius:50%;font-size:19px;line-height:1;cursor:pointer;color:#64777e;transition:.15s}
.modal-close:hover{color:#173d40;background:#fff;border-color:#a9bfbd}
.qr-grid{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}.qr-item{text-align:center;flex:1;min-width:150px;padding:10px 8px}.qr-item img{display:block;max-width:170px;width:100%;aspect-ratio:1/1;object-fit:contain;margin:0 auto;border-radius:12px;border:1px solid var(--border);background:#fff;box-shadow:0 3px 12px rgba(29,55,61,.07)}.qr-item p{margin:9px 0 0;font-size:13px;color:#50656d;font-weight:650}
.b0201-form{display:grid;grid-template-columns:1fr 1fr;gap:8px 10px}.b0201-field{display:flex;flex-direction:column;gap:3px;font-size:12px;color:#4a6168}.b0201-field select,.b0201-field input{width:100%;padding:7px 9px;border:1px solid var(--border-strong);border-radius:9px;font-size:13px;background:#fff;color:var(--text)}.b0201-field select:focus,.b0201-field input:focus{outline:none;border-color:#74b9b3;box-shadow:0 0 0 3px rgba(15,118,110,.12)}.b0201-lwh{grid-column:1 / -1;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.b0201-warn{margin-top:10px;padding:8px 10px;border-radius:9px;background:#fff8e9;border:1px solid #edd39b;color:#8a5a13;font-size:12px}.b0201-result{margin-top:12px;display:flex;flex-direction:column;gap:6px}.b0201-row{display:grid;grid-template-columns:62px repeat(3,1fr);gap:8px;align-items:center;padding:8px 10px;border:1px solid;border-radius:9px;font-size:13px}.b0201-row b{font-weight:600;font-variant-numeric:tabular-nums}.b0201-tag{font-size:12px;font-weight:700}.b0201-row--press{background:#edf8f7;border-color:#b8d9d6;color:#17635d}.b0201-row--inner{background:#f1f8f4;border-color:#bfdcc9;color:#2a6950}.b0201-row--outer{background:#fff8ea;border-color:#ead4a1;color:#865b18}.b0201-flap{margin-top:2px;font-size:12px;color:var(--muted)}.b0201-actions{margin-top:12px;display:flex;justify-content:flex-end}
/* Left panel polish: keep the Export and Contact controls visually distinct but compact. */
.left-panel .panel-section:first-child{border-top:3px solid var(--primary);padding-top:11px}
.left-panel::-webkit-scrollbar{width:8px}.left-panel::-webkit-scrollbar-track{background:transparent}.left-panel::-webkit-scrollbar-thumb{background:#c8d6d6;border-radius:99px}.left-panel::-webkit-scrollbar-thumb:hover{background:#aabfbd}
@media (max-width:1180px){.app{grid-template-columns:270px minmax(0,1fr)}.topbar .title{font-size:14px}.topbar .btn{padding:6px 9px}}
@media (max-width:900px){.app{grid-template-columns:1fr;height:auto;min-height:100vh;overflow:visible}.left-panel,.right-panel{border:0;border-bottom:1px solid var(--border)}.center{min-height:65vh}.topbar{position:sticky;top:0}.topbar-size{margin-right:0}.viewport{min-height:55vh}.modal-card{min-width:0;width:min(92vw,560px)}}