codecademy/resources/css/style.css

* {
    box-sizing: border-box;
    text-align: center;
    font-family: Helvetica;
    color: seashell;
    background-color: black;
}

body {
  position: fixed;
  top: 0px;
  bottom: 0px;
  left: 0px;
  right: 0px;
  opacity: 0.9;
  font-size: 22px;
}

.front {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0; bottom: 0; left: 0; right: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 69px;
  border-bottom: 1px solid seashell;
  flex-shrink: 0;
}

header * {
  margin: 0 10px;
}

header a:last-of-type {
  margin-right: 0;
}

header img {
  height: 50px;
}

header ul {
  list-style: none;
  display: inline-flex;
  padding: 0;
}

main {
  overflow: auto;
  margin: 0 20px;
}

main section {
  margin: 20px auto;
}

main section:first-of-type {
  margin-top: 0px;
}

#first {
  background-image: url("/resources/img/img-mission-background.jpg");
  height: 700px;
  width: 1200px;
  overflow: hidden;
  flex-shrink: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#first * {
  margin: 0;
  padding: 10px;
}

#second {
  width: 1000px;
}

#second * {
  margin: 0;
  padding: 5px;
}

#second img {
  height: 200px;
  width: 300px;
}

#second .cards {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  justify-content: center;
}

#third {
  height: 500px;
  background-image: url("/resources/img/img-locations-background.jpg");
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 1200px;
}

#third h3,.cards {
  background-color: transparent;
}

#third .cards {
  display: flex;
  justify-content: center;
}

#third .card {
  width: 300px;
  margin: 0 20px;
  opacity: 1;
}

#fourth {
  height: 200px;
}

footer {
  text-align: left;
}