:root{
  font-family:Inter,Segoe UI,Arial,sans-serif;
  color:#17202a;
  background:#eef1f5;
  --brand:#0f4f83;
  --brand-dark:#0a3558;
  --accent:#ef7d00;
  --line:#d8dee7;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#eef1f5;color:#17202a}
a{color:var(--brand)}
.site-header{
  min-height:92px;
  padding:10px 22px;
  background:#182433;
  color:#fff;
  display:grid;
  grid-template-columns:auto minmax(240px,1fr) auto auto;
  align-items:center;
  gap:18px;
}
.brand-link{display:block;line-height:0}
.brand-link img{display:block;width:220px;height:auto;border-radius:8px}
.title-block h1{font-size:22px;margin:0;line-height:1.2}
.title-block p{margin:4px 0 0;color:#b8c4d0;font-size:13px}
.language-nav{display:flex;flex-direction:column;align-items:flex-end;gap:5px;font-size:11px;color:#b8c4d0}
.language-links{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.language-links a{color:#dce5ee;text-decoration:none;padding:5px 7px;border:1px solid #405165;border-radius:5px;font-size:12px}
.language-links a:hover,.language-links a.active{background:#fff;color:#182433;border-color:#fff}
.file,button{border:0;border-radius:7px;background:#1f77d0;color:#fff;padding:10px 14px;cursor:pointer;font-weight:600;white-space:nowrap}
.file input{display:none}
.intro{background:#fff;border-bottom:1px solid var(--line);padding:15px 24px}
.intro p{max-width:1180px;margin:0 auto;text-align:center;font-size:16px;line-height:1.55;color:#334155}
.app-main{
  display:grid;
  grid-template-columns:minmax(420px,1fr) minmax(420px,1fr);
  gap:16px;
  padding:16px;
  height:calc(100vh - 150px);
  min-height:650px;
}
.panel{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;display:flex;flex-direction:column;min-height:0;box-shadow:0 2px 8px #1420330d}
.toolbar,.preview-toolbar{display:flex;align-items:center;gap:12px;padding:12px;border-bottom:1px solid #e4e8ee;background:#fff}
.toolbar{flex-wrap:wrap}
.toolbar label{font-size:13px;color:#4a5564}
.toolbar input,.toolbar select,.variables input{border:1px solid #cbd3dd;border-radius:5px;padding:6px;background:#fff;color:#17202a}
.toolbar input{width:76px}
textarea{flex:1;resize:none;border:0;outline:0;padding:16px;font:13px/1.55 Consolas,"Courier New",monospace;background:#101820;color:#d8e6f3;white-space:pre;overflow:auto;min-height:360px}
.variables{padding:10px 12px;border-top:1px solid #e4e8ee;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:8px;max-height:160px;overflow:auto}
.variables:empty{display:none}
.variables label{font-size:12px}
.variables input{display:block;width:100%;margin-top:3px}
.preview-toolbar{justify-content:space-between}
.preview-toolbar button{background:#5e6b79;padding:7px 11px}
#stage{flex:1;min-height:420px;overflow:auto;display:flex;align-items:center;justify-content:center;padding:28px;background:repeating-conic-gradient(#f2f4f7 0 25%,#e8ebef 0 50%) 50%/22px 22px}
#preview{background:white;box-shadow:0 8px 30px #0003;max-width:none;flex:0 0 auto}
.warnings{font-size:12px;padding:8px 12px;max-height:100px;overflow:auto;color:#8a2d2d;background:#fff}
.warnings:empty{display:none}
.warning{padding:3px 0}
button:disabled{opacity:.65;cursor:wait}
.seo-content{padding:40px 20px 28px;background:#fff;border-top:1px solid var(--line)}
.seo-content article{max-width:1120px;margin:0 auto}
.seo-content h2{color:var(--brand-dark);font-size:26px;margin:0 0 16px;line-height:1.25}
.seo-content h2:not(:first-child){margin-top:34px}
.seo-content p{font-size:16px;line-height:1.75;color:#3b4654;margin:0 0 14px}
.product-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:20px}
.product-links a{display:flex;align-items:center;justify-content:center;min-height:76px;padding:16px;text-align:center;text-decoration:none;font-weight:700;border:1px solid #bfd0df;border-radius:10px;background:#f5f9fc;color:var(--brand-dark);transition:.18s ease}
.product-links a:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:0 8px 20px #0f4f831a;background:#fff}
.site-footer{display:flex;align-items:center;justify-content:center;gap:22px;padding:24px;background:#182433;color:#dce5ee}
.site-footer img{display:block;width:180px;height:auto;border-radius:7px}
.site-footer p{max-width:720px;margin:0;font-size:13px;line-height:1.5}
@media(max-width:1180px){
  .site-header{grid-template-columns:auto 1fr auto}
  .language-nav{grid-column:2/4;grid-row:2;align-items:flex-end}
  .file{grid-column:3;grid-row:1}
  .brand-link img{width:190px}
}
@media(max-width:900px){
  .site-header{grid-template-columns:1fr;gap:10px;text-align:center;padding:14px}
  .brand-link,.title-block,.language-nav,.file{grid-column:1;grid-row:auto;justify-self:center;align-items:center}
  .language-links{justify-content:center}
  .app-main{grid-template-columns:1fr;height:auto;min-height:0}
  .panel{min-height:540px}
  .product-links{grid-template-columns:1fr}
  .site-footer{flex-direction:column;text-align:center}
}
@media(max-width:540px){
  .toolbar{align-items:flex-end}
  .toolbar label{display:flex;flex-direction:column;gap:4px}
  .intro p{font-size:14px}
  .seo-content h2{font-size:22px}
  .seo-content p{font-size:15px}
}