:root{
  --bg:#0b0f14;
  --panel:rgba(255,255,255,.04);
  --border:rgba(255,255,255,.10);
  --text:#e6e8eb;
  --muted:#b5bcc6;
  --muted2:#7a8491;
  --accent:#4f7cff;
  --accent2:#8aa6ff;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:14px;
  --max:1000px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height:1.6;
}

a{ color:inherit; text-decoration:none; }
a:hover{ text-decoration:underline; }

.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding:48px 20px;
}

/* =========================
   HEADER / NAV (2-ROW, FIREFOX-PROOF)
   ========================= */

.site-header{
  position: sticky;
  top: 0;
  z-index: 50;

  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "brand cta"
    "nav   nav";
  gap: 10px 12px;

  padding: 14px;
  margin-bottom: 32px;

  border: 1px solid var(--border);
  border-radius: var(--radius);

  /* Solid fallback */
  background: rgba(11,15,20,.92);
}

/* Blur only where supported */
@supports ((-webkit-backdrop-filter: blur(10px)) or (backdrop-filter: blur(10px))){
  .site-header{
    background: rgba(11,15,20,.75);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }
}

.brand{
  grid-area: brand;
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  white-space:nowrap;
  min-width:0;
}

.brand-dot{
  width:10px;
  height:10px;
  background:var(--accent);
  border-radius:50%;
  box-shadow:0 0 0 4px rgba(79,124,255,.2);
}

.nav-cta{
  grid-area: cta;
  display:flex;
  gap:10px;
  justify-content:flex-end;
  align-items:center;
  min-width:0;
}

.site-nav{
  grid-area: nav;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-start;
  min-width:0;

  /* prevents any painting/overlap */
  overflow: hidden;
}

.site-nav a{
  color:var(--muted);
  font-weight:600;
  padding:6px 8px;
  border-radius:10px;
  font-size:.95rem;
  white-space:nowrap;
}

.site-nav a:hover{
  color:var(--text);
  background:rgba(255,255,255,.04);
  text-decoration:none;
}

/* =========================
   TYPOGRAPHY
   ========================= */

h1{
  font-size:clamp(2.4rem,4vw,3.4rem);
  margin-bottom:8px;
}

h2{
  color:var(--accent2);
  margin-bottom:14px;
}

h3{ margin-bottom:10px; }
h4{ margin-bottom:6px; }

p{ color:var(--muted); }

/* =========================
   BUTTONS
   ========================= */

.cta{
  display:flex;
  gap:12px;
  margin-top:18px;
  flex-wrap:wrap;
}

.button{
  padding:12px 18px;
  border-radius:12px;
  font-weight:600;
  border:1px solid transparent;
}

.button.small{
  padding:10px 14px;
  font-size:.95rem;
}

.primary{
  background:var(--accent);
  color:#fff;
}

.secondary{
  border-color:var(--accent);
  color:var(--accent2);
}

/* =========================
   SECTIONS
   ========================= */

section{
  padding:28px 0;
  scroll-margin-top:140px;
}

.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:16px;
}

.card{
  grid-column:span 6;
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}

ul{
  padding-left:18px;
  color:var(--muted);
}

.divider{
  height:1px;
  background:var(--border);
  margin:28px 0;
}

footer{
  margin-top:48px;
  padding-top:24px;
  border-top:1px solid var(--border);
  text-align:center;
  color:var(--muted2);
}

/* =========================
   RESPONSIVE
   ========================= */

@media (max-width: 860px){
  .card{ grid-column:span 12; }
  .site-nav{ justify-content:center; }
}

@media (max-width: 520px){
  .site-header{
    grid-template-columns: 1fr;
    grid-template-areas:
      "brand"
      "cta"
      "nav";
    justify-items: center;
    text-align:center;
  }
  .nav-cta{ justify-content:center; }
  .site-nav{ justify-content:center; }
}