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

body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f9;
  color: #333;
  padding: 20px;
  line-height: 1.6;
}

h1 {
    text-align: center;
}

.container {
  max-width: 800px;
  margin: auto;
}

ul {
  list-style: none;
  counter-reset: section;
  padding-left: 0;
}

ul li {
  counter-increment: section;
  background-color: #ffffff;
  margin: 10px 0;
  padding: 15px 15px 15px 50px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  position: relative;
}

ul li::before {
  content: counter(section) ". ";
  font-weight: bold;
  color: #333;
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
}

@media (max-width: 600px) {
  body {
    padding: 10px;
  }

  ul li {
    font-size: 1rem;
    padding-left: 45px;
  }

  ul li::before {
    left: 10px;
  }
}