body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  padding: 0;
}

.sidebar {
  width: 200px;
  background-color: #333;
  color: #fff;
  height: 100vh;
  position: fixed;
  padding: 20px;
}

.sidebar h3 {
  margin-top: 0;
  font-size: 18px;
}

.sidebar a {
  display: block;
  color: #fff;
  text-decoration: none;
  padding: 8px 0;
}

.main {
  margin-left: 220px;
  padding: 20px;
}

h2 {
  margin-bottom: 20px;
}

form {
  background: #fff;
  padding: 20px;
  border-radius: 6px;
  max-width: 600px;
  box-shadow: 0 0 8px rgba(0,0,0,0.1);
}

form label {
  display: block;
  margin-top: 15px;
  font-weight: bold;
}

form input[type="text"],
form input[type="url"],
form input[type="date"],
form input[type="submit"],
form select {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
  box-sizing: border-box;
  border: 1px solid #ccc;
  border-radius: 4px;
}

form input[type="checkbox"] {
  margin-right: 5px;
}

form select[multiple] {
  height: 100px;
}