/* Custom styles for mobile optimizations */
@media (max-width: 768px) {
    .dropdown-button {
        width: 100%;
    }

    .dropdown-menu {
        width: 100%;
        position: static;
        margin-top: 1rem;
    }

    .card {
        width: 100%;
    }

    header h1 {
        text-align: center;
    }

    header .flex {
        flex-direction: column;
        gap: 1rem;
    }

    #card-container {
        flex-direction: column;
        gap: 2rem;
    }

    main {
        padding: 1rem;
    }

    #header {
        display: none;
    }

    #toggle-header-button {
        position: fixed;
        top: 1rem;
        right: 1rem;
        border-radius: 50%;
        width: 3rem;
        height: 3rem;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: #4b5563;
        color: #fff;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        z-index: 50;
        transition: background-color 0.3s ease;
    }

    #toggle-header-button:hover {
        background-color: #374151;
    }

    .header-button {
        border-radius: 1rem;
        padding: 0.5rem 1rem;
        margin: 0 auto;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: #4b5563;
        color: #fff;
        font-size: 0.875rem;
        transition: background-color 0.3s ease;
    }

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