body {
    font-family: 'Poppins', sans-serif;
    background-color: #121212;
    color: #FFFFFF;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 250px;
    background-color: #1E1E1E;
    padding: 1rem;
}

.sidebar .nav-link {
    color: #A0A0A0;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.sidebar .nav-link:hover, .sidebar .nav-link.active {
    color: #FFFFFF;
}

.sidebar .nav-link .bi {
    margin-right: 0.8rem;
}

.main-content {
    margin-left: 250px;
    padding: 2rem;
}

.kpi-card {
    background-color: #1E1E1E;
    border: 1px solid #333;
    border-radius: 0.5rem;
    padding: 1.5rem;
    color: #FFFFFF;
}

.kpi-card h5 {
    color: #A0A0A0;
    font-size: 1rem;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.kpi-card .value {
    font-size: 2.5rem;
    font-weight: 600;
}

.kpi-card .icon {
    font-size: 3rem;
    color: #007bff;
    opacity: 0.5;
}