:root {
  --bg: #0b1220;
  --panel: #111a2b;
  --text: #e8eefc;
  --muted: #a8b3cf;
  --accent: #3b82f6;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.55;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

nav a { margin-left: 12px; color: var(--muted); }
nav a:hover { color: var(--text); }

.hero {
  background: var(--panel);
  border-radius: 14px;
  padding: 32px;
  margin: 20px 0 16px;
}

h1 { margin: 0; font-size: 28px; }
h2 { margin: 0 0 8px; font-size: 24px; }
h3 { margin: 24px 0 8px; font-size: 20px; color: var(--muted); }

.btn {
  display: inline-block;
  margin-top: 12px;
  background: var(--accent);
  color: white;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
}
.btn:hover { filter: brightness(1.1); }

footer { margin: 24px 0 40px; color: var(--muted); }