body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
    text-align: center;
}
nav {
    background-color: #2c3e50;
    padding: 15px;
}
nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    font-size: 18px;
    font-weight: bold;
}
nav a:hover {
    color: #f39c12;
}
.container {
    padding: 50px;
    background-color: white;
    margin: 20px auto;
    width: 80%;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
}
.dynamic-box {
    border: 2px dashed #e74c3c;
    padding: 20px;
    margin-top: 20px;
    background-color: #fff5f5;
}
footer {
    margin-top: 50px;
    color: #777;
    font-size: 12px;
}