body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

header {
  background: #333;
  color: #fff;
  padding: 1rem;
  text-align: center;
}

nav {
  background: #ccc;
  display: flex;
  justify-content: space-around;
  padding: 1rem 0;
}

nav a {
  color: #333;
  text-decoration: none;
}

nav a:hover {
  background: #ddd;
  padding: 0.25rem;
  border-radius: 5px;
}

.wrapper {
  display: flex;
  justify-content: space-between;
}

main {
  padding: 2rem;
  width: 80%;
}

aside {
  width: 20%;
  padding: 2rem;
}

.calculator {
  max-width: 300px;
  margin: 0 auto;
}

.calculator label {
  display: block;
  margin-top: 1rem;
}

.calculator input {
  width: 100%;
  padding: 0.5rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 5px;
}

.calculator button {
  display: block;
  width: 100%;
  margin-top: 1rem;
  padding: 0.5rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  background: #333;
  color: #fff;
  cursor: pointer;
}

.calculator button:hover {
  background: #555;
}

#result {
  margin-top: 1rem;
  padding: 0.5rem;
  background: #eee;
  border: 1px solid #ccc;
  border-radius: 5px;
}

#result1 {
  margin-top: 1rem;
  padding: 0.5rem;
  background: #eee;
  border: 1px solid #ccc;
  border-radius: 5px;
}

#result2 {
  margin-top: 1rem;
  padding: 0.5rem;
  background: #eee;
  border: 1px solid #ccc;
  border-radius: 5px;
}

#result3 {
  margin-top: 1rem;
  padding: 0.5rem;
  background: #eee;
  border: 1px solid #ccc;
  border-radius: 5px;
}

.roadmap {
  list-style: none;
  padding: 0;
}

.roadmap li:before {
  content: "✔";
  color: green;
  margin-right: 0.5rem;
}