body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: #f5f7fb;
  color: #222;
  padding: 40px;
}

h1 {
  margin: 0 0 24px;
  font-size: 42px;
  color: #1a3a8a;
  text-align: center;
}

p {
  color: #555;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto 28px;
  font-size: 20px;
}

ul {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 1200px;
  width: 100%;
}

li {
  margin-bottom: 20px;
}

li a {
  display: block;
  text-decoration: none;
  color: #1a3a8a;
  background-color: #ffffff;
  padding: 22px 26px;
  border: 1px solid #d5d9e6;
  border-radius: 12px;
  font-size: 20px;
  text-align: left;
}

li a:hover {
  background-color: #eef3ff;
}

a {
  color: #0f7abf;
  font-size: 18px;
}

.back {
  display: block;
  text-decoration: none;
  color: #0f7abf;
  background-color: #e7f3ff;
  border: 1px solid #c8def7;
  padding: 12px 18px;
  border-radius: 10px;
  margin: 0 auto 24px;
  max-width: 260px;
  text-align: center;
  font-size: 18px;
}

.back:hover {
  background-color: #d9ebff;
}

.output {
  background-color: #ffffff;
  border: 1px solid #d5d9e6;
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
  max-width: 1200px;
  width: 100%;
  overflow: auto;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
  font-size: 18px;
}