body {
    font-family: Arial, sans-serif;
    background-color: #f8f9fa;
}

.hero-section {
    background-color: #343a40;
    padding: 3rem 0;
    margin-bottom: 2rem;
    border-radius: 0.25rem;
}

.card {
    margin-bottom: 1.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 48px 0 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, 0.1);
}

.sidebar-sticky {
    position: relative;
    top: 0;
    height: calc(100vh - 48px);
    padding-top: 0.5rem;
    overflow-x: hidden;
    overflow-y: auto;
}

.sidebar .nav-link {
    font-weight: 500;
    color: white;
}

.sidebar .nav-link.active {
    color: #007bff;
}

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

main {
    padding-top: 1rem;
}

.quantity-input {
    max-width: 60px;
}

.img-thumbnail {
    max-width: 100px;
    max-height: 100px;
}

.table-responsive {
    overflow-x: auto;
}

@media (max-width: 767.98px) {
    .sidebar {
        position: static;
        height: auto;
        padding-top: 0;
    }
    
    main {
        padding-top: 0;
    }
}