body {
  font-family: Arial, sans-serif;
  margin: 40px;
  background-color: #f7f9fc;
  color: #333;
}

h1 {
  color: #2c3e50;
  margin-bottom: 20px;
}

button {
  padding: 10px 20px;
  margin: 5px;
  font-size: 16px;
  border: none;
  cursor: pointer;
  border-radius: 4px;
}

.btn.primary {
  background-color: #28a745;
  color: white;
}

.btn.secondary {
  background-color: #6c757d;
  color: white;
}

.input-field {
  display: block;
  margin: 10px 0;
  padding: 8px;
  width: 300px;
  max-width: 100%;
  border: 1px solid #ccc;
  border-radius: 4px;
}

form {
  background-color: #fff;
  padding: 20px;
  margin: 30px 0;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  max-width: 400px;
}

label {
  display: block;
  margin-top: 10px;
}

select {
  padding: 8px;
  border-radius: 4px;
  width: 100%;
  margin: 10px 0;
}

table {
  border-collapse: collapse;
  margin: 30px 0;
  width: 50%;
  background-color: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

th, td {
  border: 1px solid #ccc;
  padding: 10px;
  text-align: left;
}

th {
  background-color: #f0f0f0;
}

a {
  display: block;
  margin: 10px 0;
  color: #007bff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.list-item, .nested {
  margin: 5px 0;
}

ul {
  margin-left: 20px;
}

.hidden {
  display: none;
}

.topSecret {
  color: red;
  font-style: italic;
}

.slider-wrapper {
  margin: 40px 0;
  max-width: 400px;
  padding: 20px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

iframe {
  margin-top: 40px;
}