* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: #171717;
  color: #e5e5e5;
  font-family: sans-serif;
  padding: 10px;
}

h1 {
  text-align: center;
  padding: 30px;
}

#timer {
  background-color: #262626;
  display: grid;
  align-content: center;
  min-height: 400px;
  padding: 20px;
}

p {
  text-align: center;
  padding: 10px;
  font-size: 3em;
}

button {
  font-size: 1.5em;
  color: #fff;
  background: #2e57fa;
  width: 200px;
  margin: 10px auto;
  padding: 8px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}