@charset "utf-8";

body {
  font-family: Verdana, Geneva, sans-serif;
  color: rgb(91, 91, 91);
  background-color: ivory;
  margin: 0;
}

header {
  text-align: center;
  padding: 8px 20px;
}

header img {
  width: auto;
  max-height: 110px;
  display: block;
  margin: 0 auto 5px auto;
}

header h1 {
  margin: 5px 0 0 0;
  text-align: center;
}

h1, h2 {
  text-shadow: 2px 3px 4px gray;
}

h2 {
  font-size: 1.3em;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

nav a {
  display: block;
  background-color: #506d88;
  line-height: 2.8em;
  text-decoration: none;
  text-align: center;
  color: #ffffff;
}

nav a:hover {
  background-color: #2f4a63;
  color: #fff2b3;
}

main {
  padding: 20px;
  margin-top: 35px;
}

main > img {
  width: 25%;
  padding: 25px;
  float: right;
}

body > footer {
  background-color: #506d88;
  color: rgba(255, 255, 255, 0.75);
  font-weight: bold;
  font-size: 0.9em;
  line-height: 3em;
  text-align: center;
  margin-top: 10px;
  padding: 10px;
  clear: both;
}

main ul {
  list-style-type: square;
}


.gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 15px 0 30px;
}

.gallery .tile {
  flex: 0 0 calc(25% - 12px);
  height: 200px;
  overflow: hidden;
}

.gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media only screen and (max-width: 1024px) and (min-width: 769px) {
  .gallery .tile {
    flex: 0 0 calc(50% - 12px);
    height: 220px;
  }
}

@media only screen and (max-width: 768px) {
  body {
    width: 100%;
    margin: 0;
  }

  nav li {
    float: none;
    width: 100%;
    font-size: x-large;
  }

  nav a {
    border-bottom: 1px solid black;
  }

  main > img {
    width: 90%;
    float: none;
    padding: 10px;
    margin: 0 auto;
    display: block;
  }

  .gallery .tile {
    flex: 0 0 100%;
    height: 240px;
  }
}

@media only screen and (min-width: 769px) {
  html {
    background-image: url("background.png");
    background-repeat: repeat-y;
    background-position: center top;
    background-size: cover;
  }

  body {
    width: 90%;
    margin-left: auto;
    margin-right: auto;
  }

  nav li {
    display: block;
    width: 20%;
    float: left;
  }
}