body {
    margin: 0;
    padding: 0;
    background: #f8f8f8;
    font-family: Arial, sans-serif;
}

.header {
    background: #0077cc;
    color: white;
    padding: 20px;
}

.menu a {
    color: white;
    margin-right: 20px;
    text-decoration: none;
    font-weight: bold;
}

.layout {
    display: flex;
    min-height: calc(100vh - 140px);
}

.sidebar {
    width: 220px;
    background: #eaeaea;
    padding: 20px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar a {
    text-decoration: none;
    color: #333;
}

.content {
    flex: 1;
    padding: 20px;
    background: white;
    margin: 20px;
    border-radius: 8px;
}

.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 15px;
}