body {
            background-color: rgba(255, 255, 255, 0.9);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .navbar {
            background-color: rgba(0, 123, 255, 0.7);
        }
        .navbar a {
            color: white !important;
        }
        .navbar-brand img {
            max-height: 40px;
            margin-right: 10px;
        }
        .footer {
            margin-top: auto;
            padding: 20px;
            text-align: center;
            background-color: rgba(0, 123, 255, 0.7);
            color: white;
        }
        .content-container {
            margin-top: 30px;
            margin-bottom: 30px;
            flex: 1;
        }
        .side-menu {
            background-color: #f8f9fa;
            padding: 20px;
            border-radius: 10px;
            height: 100%;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        .side-menu .nav-link {
            color: #333;
            padding: 10px 15px;
            border-radius: 5px;
            margin-bottom: 5px;
            display: flex;
            align-items: center;
            transition: all 0.3s ease;
        }
        .side-menu .nav-link i {
            margin-right: 10px;
        }
        .side-menu .nav-link:hover {
            background-color: rgba(0, 123, 255, 0.1);
            transform: translateX(5px);
        }
        .main-card {
            transition: transform 0.2s, box-shadow 0.2s;
            margin-bottom: 20px;
            border: none;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        .main-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }
        .card-body {
            text-align: center;
            padding: 25px;
        }
        .welcome-message {
            background: linear-gradient(45deg, rgba(0, 123, 255, 0.1), rgba(0, 123, 255, 0.2));
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 30px;
            text-align: center;
        }
        .btn-primary {
            background-color: rgba(0, 123, 255, 0.8);
            border: none;
            padding: 10px 20px;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background-color: rgba(0, 123, 255, 1);
            transform: scale(1.05);
        }