/* General Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 20px auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.middle-panel {
    background: #ffffff;
    padding: 20px;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
}

.ad-sidebar {
    margin-top: 20px;
    background: #ffffff;
    padding: 15px;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    text-align: center;
    width: 100%;
}

/* Navigation */
#nav {
    background-color: #e0f7fa;
    padding: 15px;
    border-radius: 8px;
    display: inline-block;
    text-align: center;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
    margin: auto;
}

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

#nav li {
    display: block;
    margin: 10px 0;
}

#nav a {
    color: #333;
    text-decoration: none;
    padding: 10px 15px;
    margin: 5px;
    border-radius: 4px;
    display: inline-block;
    transition: background 0.3s ease;
}

#nav a:hover {
    background: #b3e5fc;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        width: 95%;
    }

    .middle-panel, .ad-sidebar {
        padding: 15px;
    }

    #nav {
        width: auto;
    }
}