body {
            background-color: #f4f1ea;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        /* Custom Sidebar */
        .sidebar {
            width: 250px;
            height: 100vh;
            background: linear-gradient(180deg, #6bb36a 0%, #3a6f46 100%);
            position: fixed;
            color: white;
            z-index: 100;
        }

        .sidebar .nav-link {
            color: rgba(255, 255, 255, 0.8);
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            transition: 0.3s;
        }

        .sidebar .nav-link:hover,
        .sidebar .nav-link.active {
            color: white;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 8px;
        }

        /* Content Adjustment */
        .main-content {
            margin-left: 250px;
            padding: 30px;
        }

        /* Custom Promo Banner */
        .promo-banner {
            background-color: #7cc043;
            border-radius: 15px;
            overflow: hidden;
        }

        .card-img-top {
            height: 180px;
            object-fit: contain;
            padding: 15px;
            background-color: #f8f9fa;
        }

        @media (max-width: 768px) {
            .sidebar {
                width: 100%;
                height: auto;
                position: relative;
            }

            .main-content {
                margin-left: 0;
            }
        }