body {
    background-color: steelblue;
}

div.container {
    width: 100%;
    text-align: center;
}

header, footer {
    font-family: futura, sans-serif;
    padding: 1em;
    color: white;
    background-color: dimgray;
    clear: left;
    text-align: center;
    border-radius: 5px;
    width: 90%;
    margin: auto;
    margin-bottom: 5px;
}

nav {
    box-shadow: 0 4px 8px 0 rgba(0,0,0, 0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}

ul {
    list-style-type: none;
    margin: auto;
    padding: 0;
    overflow: hidden;
    background-color: lightgray;
    border-radius: 5px;
}

li {
    float: left;
}

li a {
    font-family: Verdana;
    display: block;
    color: #000;
    padding: 14px 16px;
    text-decoration: none;
    text-align: center;
}

li a:hover {
    background-color: #555;
}

div.polaroid {
    margin: auto;
    width: 90%;
    background-color: white;
    box-shadow: 0 4px 8px 0 rgba(0,0,0, 0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
    border-radius: 5px;
    margin-bottom: 25px;
}

img {
    border-radius: 5px;
    max-width: 100%;
    height: auto;
}

div.caption {
    text-align: center;
    padding: 10px 20px;
    font-family: Verdana;
    font-size: 20px;
    font-weight: 700;
    color: darkgreen;
    border-radius: 10px;
}

#amazon {
    width: 90%;
    margin: auto;
    background-color: #cc0808;
    margin-bottom: 25px;
    border-radius: 5px;
    box-shadow: 0 4px 8px 0 rgba(0,0,0, 0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
    padding: 5px;
}

.banner-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  background-color: lightgray;
  padding: 10px 0;
  box-sizing: border-box;
}
.banner {
  text-decoration: none;
  color: rgb(20, 8, 240);
  font-size: 28px;
  font-family: Arial, sans-serif;
  font-weight: bold;
}