:root{--c-navy:#0e233a;--c-blue:#1f6feb;--c-red:#d13a3a;--c-teal:#159e97;--c-gray:#8a96a3;--c-grid:#e7edf3}

:root{
  --bg:#f6f8f9; --surface:#ffffff; --text:#111827; --muted:#6b7280; --line:#e5e7eb;
  --primary:#173435; --tint:#f0faf7;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}
.wrap{max-width:1200px;margin:0 auto;padding:0 16px}
.pad{padding:22px 16px 28px}
.muted{color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 14px;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer;font-weight:600}
.btn.primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr)} .gap{gap:14px}
.list{margin:0;padding-left:18px}
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;padding:12px 16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:900}
.brand img{height:26px;width:auto;display:block}
.nav a{color:#1f2937;text-decoration:none;margin-left:12px;padding:6px 10px;border-radius:8px}
.nav a:hover,.nav a.active{background:#eef2f7}
.site-footer{border-top:1px solid var(--line);padding:12px 0;margin-top:24px}
.hero{padding:26px;background:var(--tint);border:1px solid var(--line);border-radius:16px;margin-top:14px}
.cta-row{display:flex;gap:10px;margin-top:12px}
.list-questions .q-item{display:block;padding:12px;border-bottom:1px solid var(--line);text-decoration:none;color:#111827;border-radius:10px}
.list-questions .q-item:hover{background:#f7fafc}
.embed-demo{border:1px dashed var(--line); padding:10px; border-radius:12px; background:#fff}
.embed-frame{width:100%; max-width:100%; height:520px; border:0; display:block; border-radius:12px; overflow:hidden}
code.block{display:block; white-space:pre-wrap; background:#0b1324; color:#e8edf7; padding:10px; border-radius:10px; font-size:12px}
.credit{font-size:12px; color:#6b7280; margin-top:6px}
/* Home sections */
.home-sections{display:flex;flex-wrap:wrap;gap:14px;margin-top:14px}
.section-card{flex:1 1 320px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;gap:12px;align-items:flex-start}
.section-icon{flex:0 0 40px;height:40px;width:40px;border-radius:10px;display:grid;place-items:center;font-size:20px;background:#eef2f7;color:#173435}
.section-body h3{margin:2px 0 6px 0}
@media (max-width:840px){
  .grid-2{grid-template-columns:1fr}
  .nav{display:none}
}

/* === Mobile Hamburger Nav === */
.hamburger{display:none; background:transparent; border:0; width:40px; height:36px; padding:0; margin-left:auto; cursor:pointer}
.hamburger span{display:block; height:2px; background:#111827; margin:7px 6px}
@media(max-width:840px){
  .hamburger{display:block}
  nav#siteNav{display:none; position:fixed; inset:60px 0 0 0; background:#fff; border-top:1px solid #e5e7eb; padding:12px 16px; z-index:60}
  nav#siteNav.open{display:block}
  nav#siteNav a{display:block; margin:8px 0; padding:10px 12px; border-radius:10px; background:#f8fafc; color:#111827; text-decoration:none}
}

@media (min-width:1024px){.filters-row{display:grid;grid-template-columns:repeat(3,minmax(240px,1fr));gap:12px;overflow:visible;white-space:normal}}