* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  height: 100vh;
  max-height: 100vh;
}

body {
  height: 100vh;
  max-height: 100vh;
}

img {
  display: none;
}

nav {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 999999;
}

.grid {
  height: 100vh;
  max-height: 100vh;
}

.grid-item { 
  background-image: url(img.jpg);
  background-repeat: no-repeat;
}