.thanks-message{
  font-size: 15pt;
  text-align: center;
  width: 100%;
  margin-bottom: 30px;
}

.top-btn{
  box-sizing: border-box;
  width: 200px;
  height: 80px;
  line-height: 80px;
  color: white;
  background: var(--main-dark-color);
  border: 3px solid var(--main-dark-color);
  border-radius: 3px;
  box-shadow: 1px 1px 6px var(--font-color);
  text-align: center;
  font-size: 15pt;
  margin-bottom: 300px;
}

@media (min-width: 900px){
  .thanks-container{
    flex-direction: column;
    align-items: center;
  }
}