* {box-sizing: border-box;}

body {
  font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}
h1 {
  margin-top:0;
  font-size:80px;
  font-weight:900;
}
header, main {
  width:75%;
  margin:auto;
}
header {
  padding:20px;
  display:flex;
  align-items:center;
  justify-content: center;
  background-image:url('images/flowers-bright.jpg');
  background-size:cover;
  min-height:260px;
}
.grid {
  margin-top:80px;
  display:grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 60px;
}
img {
  width:100%;
}