:root{
  --bg:#f7f7f9;
  --card:#ffffff;
  --text:#222;
  --muted:#666;
  --accent:#2563eb;
  --border:#e5e7eb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:system-ui, -apple-system, Segoe UI, Roboto, Arial, Noto Sans, "Helvetica Neue", sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
}
.header{
  position:sticky; top:0; z-index:10;
  background:#111; color:#fff;
  border-bottom:1px solid #000;
}
.container{max-width:1100px;margin:0 auto;padding:16px;}
.nav{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.nav a{color:#fff;text-decoration:none;padding:8px 10px;border-radius:10px}
.nav a:hover{background:rgba(255,255,255,.1)}
.lang-switch{margin-left:auto;display:flex;gap:8px}
.lang-switch button{
  background:#1f2937;color:#fff;border:1px solid #374151;border-radius:8px;padding:6px 10px;cursor:pointer
}
.lang-switch button.active{background:var(--accent);border-color:var(--accent)}
.main{padding:24px 0}
h1,h2{line-height:1.25;margin:12px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:10px}
.card h3{margin:0 0 4px}
.card p{color:var(--muted);margin:0 0 8px}
.pp{display:flex;gap:6px;align-items:center}
.pp form{display:inline}
.btn{
  border:1px solid var(--accent);
  color:#fff;background:var(--accent);
  padding:8px 12px;border-radius:10px;cursor:pointer;text-decoration:none;display:inline-block
}
.btn.secondary{background:#fff;color:var(--accent)}
.sections{display:flex;flex-direction:column;gap:24px;margin-top:10px}
.section>h2{border-bottom:1px solid var(--border);padding-bottom:8px}
footer{margin-top:32px;padding:24px 0;color:#777;border-top:1px solid var(--border)}
.badge{font-size:.85em;background:#eef2ff;color:#3730a3;border:1px solid #c7d2fe;padding:2px 6px;border-radius:6px}
.small{font-size:.9em;color:#777}
.rtl{direction:rtl;text-align:right}
.ltr{direction:ltr;text-align:left}
.notice{background:#fff7ed;border:1px solid #fed7aa;color:#7c2d12;padding:10px;border-radius:10px}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border:1px solid var(--border);padding:8px;text-align:inherit}
code.kbd{background:#e5e7eb;border-radius:6px;padding:2px 6px}