body {
  font-family: 'Roboto', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  background-color: #f5f7fa;
}
header {
  background-color: #ffffff;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
nav {
  background-color: #0066cc;
  color: #fff;
  padding: 10px;
}
nav ul {
  list-style-type: none;
  padding: 0;
  display: flex;
  justify-content: center;
}
nav ul li {
  margin: 0 15px;
}
nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}
.container {
  background-color: #ffffff;
  padding: 30px;
  margin-top: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
h1,
h2 {
  color: #0066cc;
}
.feature {
  margin-bottom: 30px;
  padding: 20px;
  background-color: #f0f5ff;
  border-radius: 8px;
}
.cta-button {
  display: inline-block;
  background-color: #0066cc;
  color: #fff;
  padding: 12px 24px;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
  transition: background-color 0.3s ease;
}
.cta-button:hover {
  background-color: #0052a3;
}
#demo-container {
  margin-top: 40px;
}
.color-picker {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}
.color-picker input {
  margin-right: 10px;
}
#demo-interface {
  border: 1px solid #ccc;
  padding: 20px;
  border-radius: 8px;
}