html, body {
    height: 100%;
}
body {
    min-height: 100vh;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f8f9fa;
}
#sidebar {
    min-height: 100vh;
    height: 100vh;
    position: sticky;
    top: 0;
}