/* beispiel */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
    padding: 20px;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 20px 0;
    text-align: center;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 15px;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

main {
    margin: 20px auto;
    max-width: 800px;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #45a049;
}

footer {
    text-align: center;
    margin-top: 20px;
    color: #555;
}