:root{
  --bg:#0f1220;
  --panel:#171a2d;
  --panel2:#1f2440;
  --text:#eef2ff;
  --muted:#a4add3;
  --line:rgba(255,255,255,.08);
  --accent:#f5a623;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(circle at top,#1b2040 0%,#0b0e1a 60%);color:var(--text)}
button,input,select{font:inherit}
.topbar{
  display:flex;justify-content:space-between;align-items:flex-start;gap:18px;
  padding:24px 28px;border-bottom:1px solid var(--line);background:rgba(8,10,18,.6);backdrop-filter:blur(12px);
}
.topbar h1{margin:0 0 8px;font-size:32px}
.topbar p{margin:0;color:var(--muted);max-width:780px}
.actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.actions button,.exportRow button{
  border:1px solid var(--line);background:#222848;color:var(--text);padding:10px 14px;border-radius:14px;cursor:pointer;
  box-shadow:0 10px 22px rgba(0,0,0,.25);
}
.actions button:hover,.exportRow button:hover{transform:translateY(-1px)}
.actions .primary,.exportRow .primary{background:linear-gradient(180deg,#ffd36b,#e08f13);color:#221507}
.layout{display:grid;grid-template-columns:440px 1fr;gap:22px;padding:22px}
.panel{
  background:linear-gradient(180deg,rgba(28,33,60,.9),rgba(17,20,34,.95));
  border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:0 24px 44px rgba(0,0,0,.35)
}
.controls h2,.previewWrap h2{margin:0 0 16px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
label{display:flex;flex-direction:column;gap:8px;color:var(--muted);font-size:14px}
input,select{
  background:#101426;color:var(--text);border:1px solid rgba(255,255,255,.08);padding:12px 14px;border-radius:14px;
}
.exportRow{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.notes{margin:14px 0 0;padding-left:18px;color:var(--muted);line-height:1.45}
.previewMeta{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:12px}
.previewMeta p{margin:6px 0 0;color:var(--muted)}
.previewShell{
  background:linear-gradient(180deg,#0b0e1c,#151935);border-radius:24px;padding:18px;min-height:920px;
  display:flex;align-items:flex-start;justify-content:center;border:1px solid rgba(255,255,255,.06);
}
#svgHost{width:100%;display:flex;justify-content:center}
#svgHost svg{max-width:100%;height:auto;filter:drop-shadow(0 28px 40px rgba(0,0,0,.38))}
.hint{margin-top:12px;color:var(--muted)}
@media (max-width:1200px){.layout{grid-template-columns:1fr}.previewShell{min-height:680px}}
@media (max-width:760px){.grid{grid-template-columns:1fr}.topbar{flex-direction:column}.layout{padding:12px}.panel{padding:16px}}