body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}
header {
    background: #2c3e50;
    color: #fff;
    padding: 10px 20px;
}
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
nav ul {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}
nav ul li {
    margin-left: 20px;
}
nav ul li a {
    color: #fff;
    text-decoration: none;
}
#menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: #fff;
}
section {
    padding: 20px;
}
button {
    padding: 10px 15px;
    background: #3498db;
    color: #fff;
    border: none;
    cursor: pointer;
}
button:hover {
    background: #2980b9;
}
footer {
    text-align: center;
    background: #2c3e50;
    color: #fff;
    padding: 10px;
}
@media (max-width: 768px) {
    nav ul {
        display: none;
        flex-direction: column;
    }
    #menu-toggle {
        display: block;
    }
}