body {
    font-family: 'Roboto', sans-serif;
    background-color: #f8f9fa;
    color: #343a40;
}
.wrapper {
    display: flex;
    flex-direction: row;
    min-height: 100vh;
    transition: all 0.3s ease;
}
.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: white;
    padding: 15px;
    position: fixed;
    height: 100%;
    transition: all 0.3s ease;
}
.sidebar-title {
    font-size: 20px;
    margin-bottom: 20px;
    text-align: center;
}
.nav-link {
    color: white;
    padding: 10px 15px;
    display: block;
    transition: background-color 0.2s ease;
}
.nav-link:hover {
    background-color: #34495e;
}
.sidebar-collapsed {
    width: 60px;
}
.content {
    margin-left: 250px;
    padding: 20px;
    width: 100%;
    transition: all 0.3s ease;
}
.content-expanded {
    margin-left: 60px;
}
.navbar {
    background-color: #ffffff;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    padding: 10px;
}
.btn-toggle-sidebar {
    font-size: 20px;
    color: #495057;
}
.dashboard-cards {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
}
.dashboard-card {
    width: 30%;
    margin: 10px;
}
.card {
    border-radius: 8px;
    box-shadow: 0px 4px 8px rgba(0,0,0,0.1);
}
.card-body {
    padding: 30px;
}
h2, h5 {
    color: #2c3e50;
}
@media (max-width: 768px) {
    .wrapper {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        position: relative;
    }
    .content {
        margin-left: 0;
        width: 100%;
    }
    .btn-toggle-sidebar {
        margin-left: 10px;
    }
    .dashboard-card {
        width: 100%;
    }
}