body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #1c2a3a;
    color: #f5f5f5;
}

a {
    color: #f5f5f5;
    text-decoration: none;
}

.sidebar {
    width: 260px;
    background: #2d3e50;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    padding: 20px;
    box-sizing: border-box;
}

.sidebar h2 {
    margin-top: 0;
    color: #f28b82;
}

.sidebar a {
    display: block;
    padding: 10px 0;
    margin: 5px 0;
}

.content {
    margin-left: 260px;
    padding: 20px;
}

.btn {
    display: inline-block;
    background: #f28b82;
    padding: 10px 20px;
    border-radius: 4px;
    margin-top: 15px;
    color: #1c2a3a;
    font-weight: bold;
}

.ad-block {
    background: #2d3e50;
    height: 120px;
    margin: 20px 0;
    padding: 10px;
    text-align: center;
    border: 1px dashed #f5f5f5;
}

@media (max-width: 800px) {
    .sidebar {
        left: -260px;
        transition: 0.3s;
    }
    .sidebar.open {
        left: 0;
    }
    .menu-btn {
        display: block;
        position: fixed;
        top: 10px;
        left: 10px;
        background: #f28b82;
        padding: 10px 15px;
        border-radius: 4px;
        z-index: 1000;
        cursor: pointer;
    }
    .content {
        margin-left: 0;
        padding-top: 60px;
    }
}