body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: #ffffff;
  color: #333;
}

header {
  background: #f4f4f4;
  padding: 1em;
  text-align: center;
}

header h1 {
  margin: 0.2em 0;
}

nav a {
  margin: 0 1em;
  text-decoration: none;
  color: #0066cc;
}

main {
  padding: 2em;
  max-width: 800px;
  margin: auto;
}

section {
  margin-bottom: 3em;
}

img {
  max-width: 150px;
  border-radius: 50%;
}

.button {
  display: inline-block;
  padding: 0.5em 1em;
  background: #0066cc;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

footer {
  text-align: center;
  padding: 1em;
  background: #f4f4f4;
  font-size: 0.9em;
}