* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  background: #0b0f14;
  color: #e6e6e6;
  line-height: 1.6;
}

a {
  color: #4da3ff;
  text-decoration: none;
}

header {
  padding: 20px 40px;
  border-bottom: 1px solid #1f2933;
}

nav a {
  margin-right: 20px;
  font-weight: 500;
}

main {
  padding: 60px 40px;
  max-width: 900px;
}

h1, h2, h3 {
  margin-bottom: 15px;
  color: #ffffff;
}

p {
  margin-bottom: 15px;
  color: #cbd5e1;
}

.section {
  margin-bottom: 60px;
}

.card {
  border: 1px solid #1f2933;
  padding: 20px;
  margin-bottom: 25px;
  border-radius: 6px;
  background: #0f172a;
}

footer {
  padding: 30px 40px;
  border-top: 1px solid #1f2933;
  color: #94a3b8;
}