body {
  text-align: center;
  background-color: white;
}

.btn {
  height: 200px;
  width: 200px;
  border-radius: 20%;
  border: 10px solid black;
  margin: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: bold;
  cursor: pointer;
}

.btn-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.line-one, .line-two {
  display: flex;
}

.yellow {
  background-color: #f99b45;
}

.red {
  background-color: #d95980;
}

.purple {
  background-color: #3e4761;
}

.green {
  background-color: #65a95d;
}

.flash {
  background-color: white !important;
}

.userflash {
  background-color: green !important;
}
@media (max-width: 600px) {
  .btn {
    max-width: 120px;
    border-width: 6px;
    font-size: 1.2rem;
  }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1rem; }
}


@media (min-width: 601px) and (max-width: 900px) {
  .btn {
    max-width: 150px;
    border-width: 8px;
    font-size: 1.5rem;
  }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.2rem; }
}


@media (min-width: 901px) {
  .btn {
    max-width: 200px;
  }
}