0~body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
}

.container {
    display: flex;
    min-height: 400px;
}

nav {
    width: 220px;
    background-color: #34495e;
    padding: 20px;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav li {
    margin-bottom: 12px;
}

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

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

main {
    flex: 1;
    padding: 20px;
    background-color: white;
}

main img {
    max-width: 100%;
    height: auto;
    margin-top: 15px;
    border-radius: 4px;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 15px;
    font-size: 0.9em;
}