.slider {
  width: 600px;
  height: 300px;
  overflow: scroll;
}

.slider ul {
  position: relative;
  clear: both;
  list-style: none;
  padding: 0;
  margin: 0;
}

.slider li {
  float: left;
  height: 299px;
}

.grid-nav {
  width: 100%;
}

h3 {
  padding: 5px;
  clear: both;
}

.grid-nav ul {
  clear: both;
  display: flex;
  justify-content: center;
}

.grid-nav-layer li {
  list-style: none;
  margin: 1px;
  float: left;
  cursor: pointer;
  padding: 6px;
  border: 2px solid #a2a2a2;
}

.grid-nav-layer li img {
  width: 80px;
  height: 40px;
}

.grid-active {
  background-color: #c4c2c3;
}