body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.sidebar {
    position: fixed;
    top: 56px;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
    overflow-y: auto;
}

.sidebar .nav-link {
    font-weight: 500;
    color: #333;
    padding: 1rem;
}

.sidebar .nav-link:hover {
    background-color: #f8f9fa;
    color: #007bff;
}

.sidebar .nav-link i {
    margin-right: 10px;
}

main {
    margin-top: 56px;
}

.card {
    border: none;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.table th {
    background-color: #f8f9fa;
}

.opacity-50 {
    opacity: 0.5;
}