:root {
  --primary-color: #ffbb00;
  --secondary-color: #00aaff;
  --background-color: #222;
  --text-color: var(--primary-color);
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  line-height: 1.25;
  margin: 0;
  padding: 1em;
  background-color: var(--background-color);
  color: var(--text-color);
}

.logo img {
  display: block;
  width: 128px;
  height: 128px;
  margin: auto;
}

h1 {
  text-align: center;
  margin-top: 20px;
}

h3 {
  padding: 0;
  margin: 0;
}

ul {
  list-style: none;
  padding: 0;
  display: grid;
  margin: auto;
  max-width: 1280px;
  grid-template-columns: 1fr 1fr 1fr;
  cursor: pointer;
}
ul li {
  display: block;
  margin: 10px 0;
  text-align: center;
  padding: 1em;
  display: grid;
  grid-template-rows: auto 1fr auto;
  border-radius: 10px;
  transition: background-color 0.3s ease;
  transition: transform 0.5s ease-in;
}
ul li h3 {
  font-size: 1.75em;
}
ul li h3 a {
  color: white;
}
ul li.deprecated {
  text-decoration: line-through;
}
ul li:hover {
  background-color: #333;
  transform: scale(1.05);
  transition: transform 0.25s ease-out;
}
@media (max-width: 768px) {
  ul {
    grid-template-columns: 1fr;
  }
}

a {
  text-decoration: none;
  color: var(--secondary-color);
}

nav {
  background-color: #333;
  padding: 10px;
  border-radius: 5px;
}
nav a {
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: bold;
}
nav a:hover {
  text-decoration: underline;
}

footer {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 10px;
  margin-top: 20px;
}