body {
  text-align: center;
}

h1 {
  text-align: center;
}
h2 {
  text-align: center;
}

.btn-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  width: 400px;
  margin: auto;
}

#strBtn {
  text-align: center;
  margin-top: 20px;
  background-color: green;
  color: white;
  height: 1.5rem;
  width: 4rem;
  border-radius: 3px;
  border: 2px solid black;
}
.btn {
  height: 150px;
  width: 150px;
  border-radius: 20%;
  border: 5px solid black;
  margin: 10px;
}

.pink {
  background-color: pink;
}
.green {
  background-color: greenyellow;
}
.blue {
  background-color: skyblue;
}
.yellow {
  background-color: yellow;
}

.flash {
  background-color: white;
}
.flashRed {
  background-color: white;
}

@media (max-width: 425px) {
  body {
    width: fit-content;
  }
}