* {
  box-sizing: border-box;
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.column {
  float: left;
  padding: 40px;
}

.navbar {
      width: 100%;
      overflow: auto; 
    }

.row::after {
  content: "";
  display: table;
  clear: both;
}

button {
  background-color: greenyellow;
  color: aliceblue;
  text-decoration: none;
  font-size: 100%;
  padding: 15px 30px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
}