html,
body {
  padding: 0;
  margin: 0;
  width: 100%;
  height: 100%;
}
#intro {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background: url(images/pxfuel.jpg) center center / cover;
}
#intro img {
  max-width: 100%;
  height: auto;
}
#intro #logo {
  width: 200px;
  margin-bottom: 30px;
}
#intro #flags ul {
  display: flex;
  list-style: none;
  gap: 30px;
  padding: 0;
  margin: 0;
}
#intro #flags ul a {
  display: flex;
  padding: 12px;
  align-items: center;
  text-decoration: none;
  gap: 12px;
  color: #000;
  background: #fff;
  border: 1px solid #f5f5f5;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  border-radius: 35px;
  font-size: 18px;
  font-weight: bold;
  transition: all .3s;
}
#intro #flags ul a:hover {
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
}
#intro #flags ul a img {
  width: 35px;
  height: 35px;
  border-radius: 50%;
}
@media only screen and (max-width: 600px) {
  #intro #flags ul {
    gap: 15px;
  }
  #intro #flags ul a {
    padding: 8px;
    gap: 8px;
    font-size: 15px;
  }
}