:root {
  --bg: #0b0b0f;
  --text: #f4f5f7;
  --accent: #6cf2ff;
  --accent2: #8a7bff;
}
body {
  margin: 0;
  font-family: Inter, sans-serif;
  background: var(--bg);
  color: var(--text);
}
header.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: rgba(11,11,15,.7);
}
.btn {
  border: 1px solid rgba(255,255,255,.2);
  padding: 10px 16px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: bold;
  color: var(--text);
}
.btn-secondary {
  background: linear-gradient(90deg,var(--accent),var(--accent2));
  color: #000;
}
section {
  padding: 40px 20px;
}
.content {
  max-width: 900px;
  margin: auto;
}
.footer {
  text-align: center;
  padding: 20px;
  border-top: 1px solid rgba(255,255,255,.1);
}