* {
  box-sizing: border-box;
}

body{
  text-align: center;
  font-family: sans-serif;
  margin: 0;
}

h1 {
  background-color: #2d2d2d;
  color: white;
  padding: 10px 0;
  margin: 0;
}

ul.menu {
  margin: 1px auto;
  padding: 0;
}

.menu li {
  background-color: #d1d1d1;
  display: inline-block;
  padding: 10px 5px;
}

.menu li:hover {
  background-color: lightsalmon;
}

.menu a {
  text-decoration: none;
  color: white;
  font-weight: bold;
}

main {
  max-width: 900px;
  margin: 0 auto;
}

.num-photos {
  background-color: aquamarine;
}

.num-photos h2 {
  text-align: left;
  font-weight: 400;
  padding: 15px 0 15px 15px;
  margin: 20px 0 10px 0;
}

strong {
  border-bottom: 2px solid gold;
}

.box {
  display: inline-block;
  padding: 10px 2px;
  width: 33.333%;
}

.box img {
  width: 100%;
}

.box a:hover {
  color: red;
}

.box footer {
 background-color: gold;
 color: black;
 padding: 10px 0;
}

footer {
  background-color: black;
  color: white;
  margin-top: 5px;
}

footer p {
  margin: 0;
  padding: 20px 0;
  font-size: 12.8px
}