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

body {
  color: #888;
  font-family: Helvetica; }

img {
  width: 100%; }

h1 {
  margin: 7vw 10vw 0;
  font-size: 3vw; }

p {
  font-size: 80%;
  margin: 0 5vw 0 0;
  text-align: right; }

ul {
  width: 75vw;
  margin: 0 auto;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
  grid-auto-rows: 80px; }

li {
  width: 200px;
  height: 160px;
  -webkit-clip-path: polygon(75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%, 25% 0);
          clip-path: polygon(75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%, 25% 0);
  grid-area: span 2 / span 4; }

.warning {
  color: red;
  font-size: 200%; }

@supports (display: grid) {
  .warning {
    display: none; } }