:root {
  --bg: #0b1220;
  --panel: #121b2f;
  --text: #e8eefc;
  --muted: #b7c3e6;
  --accent: #4ea1ff;
  --accent2: #7cf0c8;
  --border: rgba(255,255,255,0.10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 15% 10%, rgba(78,161,255,0.25), transparent 55%),
              radial-gradient(900px 500px at 85% 20%, rgba(124,240,200,0.18), transparent 60%),
              var(--bg);
  color: var(--text);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 16px;
}

.topbar {
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border);
  background: rgba(11,18,32,0.75);
  backdrop-filter: blur(10px);
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.2px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 14px;
  padding: 8px 10px;
  border-radius: 10px;
}

.nav a:hover { background: rgba(255,255,255,0.06); color: var(--text); }
.nav a.active { background: rgba(78,161,255,0.18); color: var(--text); }

.hero {
  margin: 26px 0 18px;
  padding: 18px;
  border: 1px solid var(--border);
  background: rgba(18,27,47,0.60);
  border-radius: 16px;
}

.hero h1 { margin: 0 0 10px; font-size: 28px; }
.hero p { margin: 0 0 16px; color: var(--muted); line-height: 1.45; }

.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.button {
  display: inline-block;
  text-decoration: none;
  color: #06101f;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 650;
}

.button.secondary {
  background: rgba(255,255,255,0.10);
  color: var(--text);
  border: 1px solid var(--border);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 16px 0 40px;
}

.card {
  padding: 14px;
  border: 1px solid var(--border);
  background: rgba(18,27,47,0.55);
  border-radius: 16px;
}

.card h2 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); line-height: 1.45; }

.footer {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  color: var(--muted);
}

@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
}