* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
 
body {
  font-family: Arial, Helvetica, sans-serif;
  width: 100%;
  overflow-x: hidden;
}
 
.site-header {
  width: 100%;
  line-height: 0;
  text-align: center;
  position: relative;
  z-index: 2;
}
 
.banner {
  max-width: 100%;
  width: 100%;
  height: auto;
  max-height: 180px;
  object-fit: cover;
  display: inline-block;
}
 
@media (min-width: 1200px) {
  .banner {
    max-height: 250px;
  }
}
 
.navbar {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  margin-top: -50px;
  background-color: #222;
  position: relative;
  z-index: 1;
}
 
.nav-button {
  flex: 1;
  min-width: 120px;
  height: 150px;
  display: block;
  background-color: #333;
  border: 1px solid #000;
  overflow: hidden;
}
 
.nav-icon {
  width: 100%;
  height: 100%;
  object-fit: fill;
  display: block;
}