body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #121212;
  color: #f5f5f5;
  text-align: center;
  padding: 2rem;
}
header img.profile {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 4px solid #00c6ff;
  object-fit: cover;
  margin-bottom: 1rem;
}
header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.3rem;
}
header h2 {
  font-weight: 300;
  color: #aaa;
  margin-top: 0;
}
.bio {
  max-width: 600px;
  margin: 1rem auto 2rem;
  font-size: 1.1rem;
  color: #ccc;
}
.buttons a {
  display: inline-block;
  margin: 0.5rem;
  padding: 0.6rem 1.2rem;
  background-color: #0072ff;
  color: white;
  text-decoration: none;
  border-radius: 25px;
  transition: background 0.3s;
}
.buttons a:hover {
  background-color: #005ecc;
}
footer {
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #888;
}