body {
    margin: 0;
    font-family: 'Segoe UI';
    background: #f4f6f9;
}

.sidebar {
    width: 220px;
    height: 100vh;
    background: #1f2d3d;
    position: fixed;
}

.menu-item {
    display: block;
    color: #c2c7d0;
    padding: 10px;
    text-decoration: none;
    border-radius: 6px;
}

.menu-item:hover {
    background: #3c8dbc;
    color: white;
}

.main-content {
    margin-left: 220px;
}

.topbar {
    height: 60px;
    background: white;
    border-bottom: 1px solid #ddd;
}

.card {
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.btn-success {
    background: #00a65a;
    border: none;
}

iframe {
    border-radius: 10px;
    border: 1px solid #ccc;
}

canvas {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.chart-container {
    position: relative;
    height: 550px;
    min-height: 550px;
}

    .chart-container.small {
        height: 450px;
    }

    .chart-container.large {
        height: 550px;
    }

    .chart-container canvas {
        width: 100% !important;
        height: 100% !important;
    }
.container-fluid {
    padding-bottom: 40px;
}
@media (max-width: 768px) {
    .chart-container,
    .chart-container.small,
    .chart-container.large {
        height: 400px;
    }
}
.chart-pie {
    height: 400px;
}

.chart-bar {
    height: 450px;
}