body {
    min-height: 100vh;
    display: flex;
    flex-direction: row;
}
.sidebar {
    width: 250px;
    min-height: 100vh;
    background-color: #343a40;
    color: #fff;
    background-image: url('../image/bg25-v1.webp');
    background-size: contain;
}
.sidebar .nav-link {
    color: #29365c;
}
.sidebar .nav-link.active {
    background-color: #495057;
    color: #fff;
}
.content {
    flex-grow: 1;
    padding: 20px;
    background-color: #f8f9fa;
}