body {
  width: 100vw;
  height: 100vh;
}
main {
  display: flex;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
  background: url("../images/main_image.png") center center;
  background-size: cover;
  text-align: center;
  color: #fff;
}
h1 {
  margin-top: 26px;
  font-size: 55px;
  letter-spacing: 5px;
}
h2 {
  font-size: 25px;
  font-weight: normal;
}
.main-button {
  margin-top: 30px;
  padding: 18px 30px;
  background-color: transparent;
  border: 1px solid #fff;
  box-sizing: border-box;
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}

@media (max-width: 640px) {
  h1 {
    margin-top: 20px;
    font-size: 25px;
    letter-spacing: 2px;
  }
  h2 {
    font-size: 12.5px;
  }
  .main-button {
    margin-top: 20px;
    padding: 14px 22px;
    font-size: 12.5px;
  }
}