body {
  background-color: #333;
  color: white;
  font-family: Arial, sans-serif;
  text-align: center;
  padding-top: 50px;
}

.container {
  width: 90%;
  max-width: 400px;
  margin: 0 auto;
}

.timer {
  font-size: 48px;
  margin-bottom: 20px;
}

.instruction {
  font-size: 24px;
  margin-bottom: 15px;
}

.description {
  font-size: 14px;
  margin-bottom: 15px;
}

.start-button,
.reset-button {
  font-size: 20px;
  padding: 10px;
  width: 100%;
  margin-bottom: 10px;
}

.reset-button {
  font-size: 14px;
  padding: 5px;
  width: auto;
  margin: 10px auto;
  background-color: #555;
  color: white;
}

@media (max-width: 600px) {
  .timer,
  .instruction,
  .description {
    font-size: 36px;
  }
}

.summary {
  background-color: #444;
  color: #fff;
  padding: 15px;
  margin-bottom: 20px;
  border-radius: 10px;
  text-align: center;
  font-size: 10px;
  margin-left: auto;
  margin-right: auto;
  max-width: 180px;
}

.summary p {
  font-weight: bold;
}

.summary ul {
  list-style-type: none;
  padding: 0;
  text-align: left;
  display: inline-block;
  margin: 0;
}

.summary li {
  margin-bottom: 5px;
}