.start-btn {
  display: inline-block;
  padding: 12px 24px;
  background-color: #5b8df8;
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: 0.2s;
}

.start-btn:hover {
  background-color: #4a7de0;
}
body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  background-color: #f9f9fb;
  font-family: "Pretendard", sans-serif;
  text-align: center;
}