style.css

html, body {
  margin: 0;
  padding: 0;
  background-color: #3b404e;
  color: white;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";  
  height: 100vh;
  width: 100vw;
  max-width: 100%;
  max-height: 100%;
}

a {
  text-decoration: none;
  color: white;
}

header {
  display: flex;
  align-items: center;
  flex-direction: column;
}

main {
  display: flex;
  align-items: center;
  flex-direction: column;
  margin-top: 3em;
}

footer {
  display: flex;
  align-items: center;
  flex-direction: column;
  margin-top: 3em;
}

ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 2em 0 0 0;
}

li {
  background: white;
  color: #3b404e;
  padding: 1rem;
  border-radius: 10px;
  flex-grow: 1;
  margin-left: 2%;
  margin-bottom: 2%;
  cursor: pointer;
  box-shadow: 0 0.5rem 1rem rgb(3 0 4 / 15%);
  max-width: 12em;
}

li:hover {
  background-color: #ececec;
  box-shadow: 0 0.5rem 1rem rgb(3 0 4 / 35%);
}

li a {
  color: #3b404e;
}

.huge-title {
  font-size: 6em;
  padding-top: .7em;
}

.card {
  background-color: lightslategrey;
  max-width: 50em;
  padding: 1em 2em;
  border-radius: 5px;
  box-shadow: 0 0.5rem 1rem rgb(3 0 4 / 15%);
}

.card-title {
  font-weight: bold;
}

.text-white {
  color: white;
}