:root{
  --bg:#f4f5f7;--panel:#fff;--ink:#111827;--muted:#667085;--line:#e5e7eb;
  --accent:#111827;--soft:#f8fafc;--radius:22px;--shadow:0 18px 55px rgba(17,24,39,.08)
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:
radial-gradient(circle at 8% 0%,#fff 0,transparent 30%),var(--bg)}
button,input,select,textarea{font:inherit}
.app-shell{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:64px 0 28px}
.intro{max-width:790px;margin-bottom:36px}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.18em;color:#667085}
h1{font-size:clamp(38px,6vw,68px);line-height:.98;letter-spacing:-.055em;margin:12px 0 20px;max-width:850px}
.intro p{font-size:18px;line-height:1.65;color:var(--muted);max-width:760px}
.features{display:flex;gap:18px;flex-wrap:wrap;margin-top:20px;color:#344054;font-size:14px;font-weight:650}
.workspace{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(360px,.75fr);gap:22px;align-items:start}
.panel{background:rgba(255,255,255,.94);border:1px solid rgba(229,231,235,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
.controls{padding:28px}
.preview-panel{padding:28px;position:sticky;top:22px}
.panel-heading,.section-title{display:flex;align-items:center;justify-content:space-between;gap:14px}
.panel-heading>div,.section-title{justify-content:flex-start}
.panel-heading>div{display:flex;align-items:center;gap:10px}
h2{font-size:17px;margin:0}
.step{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:#111827;color:#fff;font-size:11px;font-weight:800}
.ghost{border:0;background:transparent;color:#667085;cursor:pointer;font-weight:650}
.field{display:grid;gap:8px;margin-top:22px}
.field>span{font-size:13px;font-weight:750}
.field small,.upload small{font-size:12px;color:#98a2b3;line-height:1.4}
input,select,textarea{width:100%;border:1px solid #d0d5dd;border-radius:12px;background:#fff;color:#101828;padding:12px 13px;outline:none;transition:.18s}
textarea{resize:vertical;min-height:92px}
input:focus,select:focus,textarea:focus{border-color:#667085;box-shadow:0 0 0 4px rgba(102,112,133,.10)}
input[type=color]{height:48px;padding:5px;cursor:pointer}
.phone-row{display:grid;grid-template-columns:90px 1fr;gap:10px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.divider{height:1px;background:var(--line);margin:28px 0}
.upload{margin-top:14px;border:1px dashed #cbd5e1;border-radius:14px;padding:18px;display:grid;gap:4px;cursor:pointer;background:#f8fafc}
.upload input{display:none}.upload span{font-size:13px;font-weight:750}
.warning{margin-top:18px;padding:12px 14px;border-radius:12px;background:#fff7ed;color:#9a3412;font-size:13px}
.status{display:flex;align-items:center;gap:7px;font-size:12px;color:#667085;font-weight:700}
.status i{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px #dcfce7}
.qr-stage{margin-top:24px;aspect-ratio:1;border-radius:20px;background:#f8fafc;border:1px solid #eef2f6;display:grid;place-items:center;padding:9%;overflow:hidden}
#qrCanvasWrap{width:100%;height:100%;display:grid;place-items:center}
#qrCanvasWrap canvas,#qrCanvasWrap img{width:100%!important;height:100%!important;image-rendering:pixelated}
.empty-state{display:grid;text-align:center;justify-items:center;gap:7px;color:#98a2b3}
.empty-state strong{color:#475467}.empty-icon{font-size:42px}
.encoded{margin:18px 0;background:#f8fafc;border:1px solid #eef2f6;border-radius:14px;padding:13px}
.encoded span{display:block;font-size:11px;font-weight:800;color:#98a2b3;text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}
.encoded code{display:block;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;color:#475467;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.primary{width:100%;border:0;border-radius:13px;padding:14px 18px;background:#111827;color:#fff;font-weight:800;cursor:pointer;transition:.18s}
.primary:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(17,24,39,.18)}
.primary:disabled{opacity:.35;cursor:not-allowed;transform:none;box-shadow:none}
.print-note{text-align:center;color:#98a2b3;font-size:11px;line-height:1.5;margin:10px 12px 0}
footer{text-align:center;color:#98a2b3;font-size:12px;padding-top:28px}
@media(max-width:850px){.app-shell{padding-top:34px}.workspace{grid-template-columns:1fr}.preview-panel{position:static}.intro{margin-bottom:24px}}
@media(max-width:520px){.app-shell{width:min(100% - 20px,1180px)}.controls,.preview-panel{padding:20px}.grid-2{grid-template-columns:1fr}h1{font-size:42px}}