body { font-family: Arial, sans-serif; margin: 0; }
.wrap { max-width: 900px; margin: 0 auto; padding: 16px; }
header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #ddd; }
nav a { margin-left: 12px; text-decoration: none; }
button { padding: 10px 14px; cursor: pointer; }
.profile-img {
  display: block;
  max-width: 100%;
  width: 300px;
  margin: 20px auto;
  border-radius: 12px;
}