.sidebar {
    width: 250px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background-color: #1f2937;
    color: white;
    padding: 20px;
    transition: transform 0.3s ease;
    z-index: 1000;
}

.sidebar-logo {
    margin-bottom: 32px;
    padding: 0 12px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.sidebar-logo img {
    height: 60px;
    width: auto;
    max-width: 100%;
}

.nav-item {
    padding: 12px;
    margin-bottom: 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.nav-item:hover {
    background-color: #374151;
}

.nav-item.active {
    background-color: #374151;
}

/* Mobile menu button */
.mobile-menu-button {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    background-color: #1f2937;
    color: white;
    padding: 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: background-color 0.2s;
}

.mobile-menu-button:hover {
    background-color: #374151;
}

/* Responsive styles */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .mobile-menu-button {
        display: block;
    }

    .sidebar-logo {
        margin-top: 20px;
        margin-bottom: 40px;
    }

    .sidebar-logo img {
        height: 80px;
    }

    /* Overlay when sidebar is open */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    .sidebar-overlay.show {
        display: block;
    }
}

/* Additional responsive adjustments for smaller screens */
@media (max-width: 640px) {
    .mobile-menu-button {
        top: 0.5rem;
        left: 0.5rem;
    }

    .content-area {
        padding-top: 60px; /* Add padding for mobile menu button */
    }

    .module-title {
        padding-left: 50px; /* Add padding to prevent title from being hidden under menu button */
    }

    .sidebar-logo img {
        height: 70px;
    }
}