:root{
  --bg:#0b1220; --card:#0f172a; --text:#e5e7eb; --muted:#94a3b8; --border:#1e293b;
  --primary:#0ea5e9; --primary-600:#0284c7;
}
:root.light{
  --bg:#f7fafc; --card:#ffffff; --text:#0f172a; --muted:#475569; --border:#e2e8f0;
  --primary:#0ea5e9; --primary-600:#0284c7;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;}
.container{max-width:960px;margin:0 auto;padding:16px;}
.site-header{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--border);
  background:linear-gradient(180deg, rgba(14,165,233,.08), rgba(14,165,233,0));backdrop-filter:blur(6px) saturate(120%);}
.header-inner{display:flex;align-items:center;justify-content:space-between;}
h1{font-size:clamp(22px,2.8vw,32px);margin:8px 0;}
h2{font-size:clamp(18px,2.2vw,24px);margin:0 0 10px 0;}

.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px;margin:16px 0;box-shadow:0 6px 20px rgba(0,0,0,.08);}
.muted{color:var(--muted);} .small{font-size:12px;} .mt8{margin-top:8px;}

.grid.two{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
@media (max-width:720px){.grid.two{grid-template-columns:1fr;}}

.form-group{margin:10px 0;}
label{display:block;font-weight:600;margin-bottom:6px;}
input,select,textarea,button{font:inherit}
input[type="number"], input[type="color"], input[type="text"], input[type="url"], select, textarea{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--card);color:var(--text);
}
textarea{resize:vertical;min-height:96px;}
input:focus,select:focus,textarea:focus{outline:3px solid rgba(14,165,233,.35);outline-offset:2px;}

.hstack{display:flex;gap:12px;align-items:center;}
.radio, .checkbox{display:inline-flex;align-items:center;gap:8px;}

.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px;}
button{cursor:pointer;border-radius:10px;border:1px solid var(--border);padding:10px 14px;background:var(--card);color:var(--text);min-height:44px;}
button.primary{background:linear-gradient(90deg,var(--primary),var(--primary-600));color:#fff;border:none;}
button.secondary{background:#132033;border-color:#243b61;color:#fff;}
button.ghost{background:transparent;border-color:var(--border);}
button:disabled{opacity:.55;cursor:not-allowed;}

.drop-zone{
  border:2px dashed var(--border);
  border-radius:16px;
  background:rgba(2,6,23,.25);
  padding:16px;
  text-align:center;
  transition: border-color .2s ease, background .2s ease;
}
.drop-zone.focus, .drop-zone.dragover{ border-color: var(--primary); background: rgba(14,165,233,.08); }
.dz-inner{ display:grid; place-items:center; gap:8px; }
.dz-icon{ font-size: 36px; }
.linklike{ text-decoration: underline; color: var(--primary); cursor: pointer; }

.qr-wrap{display:grid;place-items:center;padding:12px;border:1px dashed var(--border);border-radius:12px;background:rgba(2,6,23,.25);}
.hidden{display:none !important;}

.header-actions .ghost{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--border);}
canvas{max-width:100%;height:auto;background:transparent}