body {
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #222;
}
header {
  text-align: center;
  padding: 2rem 1rem 1rem 1rem;
  background: #fff;
  border-bottom: 1px solid #eee;
}
.profile-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
  border: 2px solid #eee;
}
nav {
  margin: 1rem 0;
}
nav a {
  margin: 0 0.5rem;
  text-decoration: none;
  color: #0077cc;
  font-weight: 500;
}
nav a:hover {
  text-decoration: underline;
}
main {
  max-width: 700px;
  margin: 2rem auto;
  padding: 0 1rem;
}
section {
  margin-bottom: 2.5rem;
}
h2 {
  color: #0077cc;
  margin-bottom: 0.5rem;
}
ul {
  padding-left: 1.2rem;
}
.social-links a {
  margin-right: 0.7rem;
  color: #444;
  text-decoration: none;
}
.social-links a:hover {
  color: #0077cc;
}
footer {
  text-align: center;
  padding: 1rem;
  background: #fff;
  border-top: 1px solid #eee;
  color: #888;
  font-size: 0.95rem;
}
@media (max-width: 600px) {
  main {
    padding: 0 0.5rem;
  }
  .profile-photo {
    width: 90px;
    height: 90px;
  }
}