:root{
  --sf-bg:#05070d;
  --sf-panel:rgba(12,17,28,.82);
  --sf-border:rgba(148,163,184,.16);
  --sf-text:#eef2ff;
  --sf-muted:#94a3b8;
  --sf-accent:#8b5cf6;
  --sf-accent2:#22d3ee;
  --sf-green:#34d399;
}

*{box-sizing:border-box}

body{
  margin:0;
  background:
    radial-gradient(circle at 20% 0%,rgba(139,92,246,.12),transparent 35%),
    radial-gradient(circle at 80% 10%,rgba(34,211,238,.08),transparent 30%),
    var(--sf-bg);
  color:var(--sf-text);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.65;
}

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

.sf-page{
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

.sf-nav{
  position:sticky;
  top:0;
  z-index:20;
  border-bottom:1px solid var(--sf-border);
  background:rgba(5,7,13,.82);
  backdrop-filter:blur(18px);
}

.sf-nav-inner{
  max-width:1180px;
  margin:auto;
  min-height:72px;
  padding:0 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}

.sf-brand{
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:800;
  letter-spacing:.02em;
}

.sf-brand-mark{
  width:36px;
  height:36px;
  border:1px solid rgba(139,92,246,.55);
  border-radius:11px;
  display:grid;
  place-items:center;
  box-shadow:0 0 24px rgba(139,92,246,.18);
  background:linear-gradient(145deg,rgba(139,92,246,.18),rgba(34,211,238,.08));
}

.sf-brand-mark::after{
  content:"SF";
  font-size:11px;
  font-weight:900;
  color:#fff;
  text-shadow:0 0 12px rgba(139,92,246,.9);
}

.sf-links{
  display:flex;
  align-items:center;
  gap:6px;
  flex-wrap:wrap;
}

.sf-links a{
  padding:9px 12px;
  border-radius:9px;
  color:var(--sf-muted);
  font-size:14px;
  transition:.2s ease;
}

.sf-links a:hover,
.sf-links a.active{
  color:#fff;
  background:rgba(148,163,184,.08);
}

.sf-main{
  width:min(980px,calc(100% - 32px));
  margin:0 auto;
  padding:72px 0 90px;
  flex:1;
}

.sf-hero{
  text-align:center;
  margin-bottom:54px;
}

.sf-kicker{
  color:var(--sf-accent2);
  font-size:12px;
  font-weight:800;
  letter-spacing:.14em;
  text-transform:uppercase;
  margin-bottom:14px;
}

.sf-hero h1{
  margin:0;
  font-size:clamp(38px,6vw,64px);
  line-height:1.05;
  letter-spacing:-.04em;
}

.sf-hero p{
  max-width:700px;
  margin:20px auto 0;
  color:var(--sf-muted);
  font-size:18px;
}

.sf-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}

.sf-card{
  background:var(--sf-panel);
  border:1px solid var(--sf-border);
  border-radius:18px;
  padding:24px;
  box-shadow:0 16px 40px rgba(0,0,0,.18);
}

.sf-card h2,
.sf-card h3{
  margin-top:0;
  line-height:1.25;
}

.sf-card p,
.sf-card li{
  color:var(--sf-muted);
}

.sf-wide{
  grid-column:1/-1;
}

.sf-section{
  margin-top:22px;
}

.sf-price{
  font-size:40px;
  font-weight:900;
  letter-spacing:-.03em;
  margin:6px 0 14px;
}

.sf-price small{
  font-size:14px;
  color:var(--sf-muted);
  font-weight:500;
}

.sf-list{
  margin:0;
  padding-left:20px;
}

.sf-note{
  border-left:3px solid var(--sf-accent);
  padding:12px 16px;
  background:rgba(139,92,246,.07);
  color:var(--sf-muted);
  border-radius:0 10px 10px 0;
}

.sf-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  margin-top:24px;
  padding:12px 18px;
  border-radius:10px;
  font-weight:800;
  background:linear-gradient(135deg,var(--sf-accent),#6d5dfc);
  color:#fff;
  box-shadow:0 10px 30px rgba(139,92,246,.24);
}

.sf-table-wrap{
  overflow-x:auto;
}

.sf-table{
  width:100%;
  border-collapse:collapse;
}

.sf-table th,
.sf-table td{
  padding:14px;
  text-align:left;
  border-bottom:1px solid var(--sf-border);
  vertical-align:top;
}

.sf-table th{
  color:#fff;
}

.sf-footer{
  border-top:1px solid var(--sf-border);
  background:rgba(3,5,10,.75);
}

.sf-footer-inner{
  width:min(1180px,calc(100% - 32px));
  margin:auto;
  padding:28px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}

.sf-footer-links{
  display:flex;
  gap:24px;
  flex-wrap:wrap;
}

.sf-footer-links a{
  color:var(--sf-muted);
  font-size:13px;
}

.sf-footer-links a:hover{color:#fff}

@media(max-width:800px){
  .sf-nav-inner{padding:0 16px}
  .sf-links{display:none}
  .sf-grid{grid-template-columns:1fr}
  .sf-main{padding-top:48px}
  .sf-footer-inner{
    flex-direction:column;
    align-items:flex-start;
  }
}