style.css

@import url('https://fonts.googleapis.com/css2?family=Single+Day&display=swap');

html {
  box-sizing: border-box;
}

body {
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  background: rgb(152, 152, 152);
}

h1 {
  letter-spacing: 5px;
  text-transform: uppercase;
  text-align: center;
  color: whitesmoke;
}

video {
  display: none;
}

.button-container {
  border: 2px solid black;
  padding: 10px;
  border-radius: 7px;
  box-shadow: inset 0 20px 4px -19px rgba(255, 255, 255, 0.7);
}

button {
  cursor: pointer;
  outline: none;
  width: 160px;
  height: 120px;
  font-family: 'Single Day', sans-serif;
  font-size: 25px;
  text-shadow: 0 2px 5px black;
  background: linear-gradient(to top, #696969, #575757);
  border: 2px solid black;
  border-radius: 7px;
  box-shadow: inset 0 20px 4px -19px rgba(255, 255, 255, 0.4), 0 12px 12px 0 rgba(0, 0, 0, 0.3);
}

button:hover {
  background: linear-gradient(to bottom, #696969, #575757);
}

button[data-action='SHOW'] {
  color: #d3962c;
}

button[data-action='STOP'] {
  color: rgb(185, 68, 68);
}

button:active {
  transform: translateY(3px);
  box-shadow: 0 6px 6px 0 rgba(0, 0, 0, 0.3);
}