html {
  font: 12px/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: #999;
}
body {
  margin: 0;
  padding: 0;
}
ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
li {
  margin: 0;
  padding: 0;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
}
.expression-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px;
}
.expression-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 150px;
  overflow: hidden;
}
.expression-image {
  width: 150px;
  height: 150px;
  object-fit: contain;
}
footer {
  text-align: center;
}