header {
  position: relative;
  margin: 0;
}

.header_img {
  width: 100%;
}

body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
}

h1 {
  font-size: 20px;
  padding-left: 20px;
  padding-right: 20px;
  text-align: center;
}

p {
  padding-left: 20px;
  padding-right: 20px;
}

.button {
  background-color: #4CAF50;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  border-radius: 5px;
}