body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #0f172a;
  color: #f8fafc;
}
.hero {
  text-align: center;
  padding: 100px 20px;
  background: linear-gradient(135deg, #2563eb, #1e40af);
}
section {
  max-width: 900px;
  margin: auto;
  padding: 50px 20px;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
  gap: 20px;
}
.cards a {
  background: #1e293b;
  padding: 30px;
  border-radius: 12px;
  text-decoration: none;
  color: white;
  text-align: center;
}
.skills li {
  list-style: none;
  background: #1e293b;
  padding: 10px;
  margin: 8px 0;
  border-radius: 8px;
}
.btn {
  background: #2563eb;
  padding: 15px 25px;
  color: white;
  text-decoration: none;
  border-radius: 10px;
}
footer {
  text-align: center;
  padding: 30px;
  opacity: 0.7;
}