html,
body {
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.wrapper {
  border: 1px solid #0006;
}

button:not(:disabled) {
  cursor: pointer;
}

.matrix-buttons {
  padding: 6px;
  border-radius: 5px;
  border: 1px solid #0006;
  margin: 10px 0;
}

.matrix-buttons > button {
  width: 30px;
  height: 25px;
  border-radius: 3px;
  background-color: white;
  border: 1px solid #0006;
}

.start {
  background: none;
  border: none;
  text-transform: uppercase;
  text-decoration: underline;
}

canvas {
  display: block;
}

.death-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: black;
  z-index: 1000;
}

.death-screen h2 {
  font-size: 2em;
  margin-bottom: 20px;
}

.death-screen button {
  margin: 10px;
  padding: 10px 20px;
  font-size: 1.2em;
  background-color: white;
  border: 1px solid #0006;
  border-radius: 3px;
  cursor: pointer;
}

.death-screen button:hover {
  background-color: #f0f0f0;
}