body {
  margin: 0;
  font-family: sans-serif;
  background: #6d435e;
  text-align: center;
  color: #efdb76;
}

header {
  padding: 40px 20px;
}

.btn {
  display: inline-block;
  background: #f6f07a;
  color: #000;
  padding: 15px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  margin-top: 20px;
}

.foto img {
  width: 100%;
  max-width: 400px;
  border-radius: 50% 50% 0 0;
  margin-top: 40px;
}