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

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

header h1 {
  margin: 0;
}

nav ul {
  list-style-type: none;
  padding: 0;
}

nav ul li {
  display: inline;
  margin-right: 10px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
}

main {
  padding: 2rem;
}

.nav ul {
  list-style-type: none;
  padding: 0;
}

.nav ul li {
  display: inline;
  margin-right: 10px;
}

.nav ul li button {
  padding: 20px;
  background-color: #333;
  border-radius: 20px;
}

.nav ul li a {
  font-size: large;
  color: #ddd;
  text-decoration: none;
}

footer {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 1rem;
  position: fixed;
  bottom: 0;
  width: 100%;
}

form {
  max-width: 500px;
  margin: 0 auto;
}

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

input[type='text'],
input[type='number'],
input[type='file'],
select {
  width: 100%;
  padding: 0.5rem;
  margin-top: 0.5rem;
}

button {
  background-color: #333;
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  margin-top: 1rem;
  cursor: pointer;
}

button:hover {
  background-color: #555;
}

#result {
  margin-top: 1rem;
  padding: 1rem;
  background-color: #f4f4f4;
  border: 1px solid #ddd;
}