body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
}

.full-screen-text {
  font-size: calc(2vw + 2vh + 2vmin);
  text-align: center;
  color: #333;
  margin: auto;
  padding: 20px;
  border: 2px solid #333;
  background-color: #fff;
}

@media screen and (max-width: 768px) {
  .full-screen-text {
    font-size: calc(4vw + 4vh + 2vmin);
  }
}

/* Reset some default browser styles */
button {
  margin: 10px;
  padding: 10px;
  border: 0;
  outline: 0;
}

/* Make the button look modern */
#play-button {
  background-color: #6200ea;  /* Material Indigo */
  color: white;
  border-radius: 50%;  /* Rounded corners */
  width: 100px;
  height: 100px;
  font-size: 24px;
  cursor: pointer;
  transition: background-color 0.3s ease; /* Smooth transition for hover effect */
  padding: 10px;
  margin: 10px;
}

#play-button:hover {
  background-color: #3700b3;  /* Darker shade for hover state */
}

#play-button:active {
  background-color: #03dac5;  /* Material Teal for click state */
}