body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
h1 {
  font-size: 36px;
  color: #16D7B5;
}
h2 {font-size: 24px;}

.maillink {
  color: #F5E809;
  text-decoration: none;
  font-size: 18px;
  text-transform: uppercase;
  background-color: #000000;
  padding: 20px 30px;
  border: 0px;
  border-radius: 10px;
  transition: all 0.5s;
}
.maillink:hover {
  color: #16D7B5;
}
.flex-container {
  height: 80vh;
  padding: 0;
  margin: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
row {
  width: 90%;
}
img {
  width: 750px;
  margin: 60px 0;
}

@media only screen and (max-width: 768px) {
  h1 {font-size: 24px;}
  h2 {font-size: 18px;}

  img {
    width: 350px;
    margin: 40px 0;
  }
  .maillink {
    padding: 10px 15px;
    font-size: 14px;
  }
}