body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  background: #050810;
  color: #f5f7ff;
}
a { color: #5de4ff; text-decoration: none; }
header {
  background: radial-gradient(circle at top, #18243a 0, #050810 55%);
  padding: 18px 24px;
  border-bottom: 1px solid #1b2333;
}
header .brand {
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 13px;
  text-transform: uppercase;
}
header .brand span {
  color: #47f9c0;
}
nav {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
nav a {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid #2c3a55;
  font-size: 13px;
}
nav a.active {
  background: #47f9c0;
  color: #020308;
  border-color: #47f9c0;
}
.main {
  max-width: 960px;
  margin: 32px auto 48px auto;
  padding: 0 16px 32px 16px;
}
.hero {
  margin-bottom: 32px;
}
.hero h1 {
  font-size: 28px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.hero p {
  max-width: 620px;
  color: #c1c6dd;
  line-height: 1.5;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 18px;
}
.card {
  background: #0b1220;
  border-radius: 16px;
  padding: 16px 18px;
  border: 1px solid #1b2333;
}
.card h3 {
  margin-top: 0;
  margin-bottom: 6px;
  font-size: 16px;
}
.card p {
  margin: 0;
  color: #c1c6dd;
  font-size: 14px;
}
.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  border: 1px solid #36476b;
  color: #9fb4ff;
  margin-bottom: 6px;
}
footer {
  border-top: 1px solid #1b2333;
  padding: 16px;
  text-align: center;
  color: #7a86aa;
  font-size: 12px;
}
.btn-primary {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 18px;
  border-radius: 999px;
  background: #47f9c0;
  color: #020308;
  font-weight: 600;
  font-size: 14px;
}
section h2 {
  font-size: 18px;
  margin-top: 8px;
  margin-bottom: 6px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
section p.lead {
  color: #c1c6dd;
  font-size: 14px;
}
@media (max-width: 640px){
  .hero h1 { font-size: 22px; }
}