.app-header {
    background-color: #1f2937;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 40px;
    color: white;
    flex-wrap: wrap;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: #1f2937;
}

    .app-header .left {
        flex: 1;
        display: flex;
        justify-content: flex-start;
        padding-left: 60px;
    }

        .app-header .left h1 {
            margin: 0;
            font-size: 1.3rem;
            color: #f9fafb;
            text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.6), 0 0 10px rgba(59, 130, 246, 0.6);
            transition: transform 0.3s ease, text-shadow 0.3s ease;
        }

            .app-header .left h1:hover {
                transform: scale(1.05);
                text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7), 0 0 15px rgba(59, 130, 246, 0.8);
            }

    .app-header .center {
        flex: 1;
        display: flex;
        justify-content: center;
        gap: 40px;
    }

        .app-header .center a {
            display: inline-block;
        }

            .app-header .center a img {
                height: 65px;
                width: auto;
                transition: transform 0.3s ease;
                cursor: pointer;
                border-radius: 6px;
            }

                .app-header .center a img:hover {
                    transform: scale(1.1);
                }

    .app-header .right {
        flex: 1;
        display: flex;
        justify-content: flex-end;
        padding-right: 60px;
    }



@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: stretch;
        padding: 0px 20px;
        text-align: center;
    }

        .app-header .left, .app-header .center, .app-header .right {
            flex: none;
            margin: 10px 0;
            justify-content: center;
            padding-left: 0 !important;
            padding-right: 0 !important;
        }

            .app-header .left h1 {
                font-size: 1.4rem;
                text-shadow: none;
                display: none;
            }

        .app-header .center {
            flex-wrap: wrap;
            gap: 10px;
        }

            .app-header .center a img {
                height: 45px;
            }

        .app-header .right select {
            width: 100%;
            max-width: none;
            padding-right: 40px;
            background-position: right 10px center;
        }
}