.pu-upper-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #000046;
    background: -webkit-linear-gradient(to left, #1CB5E0, #000046);
    background: linear-gradient(to left, #1CB5E0, #000046);
    min-height: 45px;
    padding: 10px 20px;
}

@media (max-width: 991px) {
    .pu-upper-nav {
        display: none;
    }
}

.pu-upper-nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

    .pu-upper-nav-menu li {
        margin: 0 10px;
    }

    .pu-upper-nav-menu li a {
        color: white;
        text-decoration: none;
    }

    .pu-upper-nav a i {
        font-size: 20px; /* Adjust the size as needed */
    }

    .pu-upper-nav-menu li a:hover {
        color: #febf3a;
    } 

.nav-menu-right {
    display: flex;
    align-items: center;
}

.image-container {
    position: relative;
}


.top-image {
    left: 50%;
    position: absolute;
    top: 0;
    -webkit-transform: translateX(-50%);
    transform: translateX(-50%);
    transition: width .4s ease-in-out;
    z-index: 100;
}

.top-first-image {
    position: relative;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    align-items: flex-start;
    transition: height 0.3s ease;
}

#img1 {
    display: block;
    background-image: url("../images/big_logo.png");
    width: 320.5px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    align-items: baseline;
    transition: 0.5s;
}

#img2 {
    display: none;
    transition: 0.5s;
}

#pu_nav_title {
    transition: 0.5s;
}

#pu_nav_subtitle {
    transition: 0.5s;
}

@media all and (max-width: 991px) {
    #img1 {
        display: none;
    }

    #img2 {
        display: block;
    }
}

.nav-item a {
    color: #000046;
}

.navbar-light .navbar-nav .nav-link {
    color: #000046;
    transition: border-bottom 0.3s ease-in-out;
}

    .navbar-light .navbar-nav .nav-link:hover {
        color: #000046;
        border-bottom: #000046 1px solid;
    }

.dropdown-menu {
    border: 0;
    left: 0;
    transition: opacity .3s ease-in;
}

.dropdown-hover:hover > .dropdown-menu {
    display: inline-block;
}

.dropdown-hover:hover .overlay {
    transition: all .4s ease-in;
    opacity: .5;
}

.dropdown-hover > .dropdown-toggle:active {
    /*Without this, clicking will make it sticky*/
    pointer-events: none;
}

.list-group a:hover {
    border-bottom: 2px solid #000046;
    ;
}

.list-group-item {
    transition: border-bottom 0.3s ease-in-out;
}

.overlay {
    background-color: #000;
    height: 200vh;
    left: 50%;
    opacity: 0;
    pointer-events: none;
    position: absolute;
    top: 100%;
    -webkit-transform: translateX(-50%);
    transform: translateX(-50%);
    transition: opacity .3s ease-in;
    width: 100vw;
    z-index: -1;
}


/* ofcanvas menu */

summary {
    display: block;
    cursor: pointer;
    outline: 0;
}

    summary::-webkit-details-marker {
        display: none;
    }



.tree-nav__item {
    display: block;
    white-space: nowrap;
    color: #000046;
    position: relative;
}

    .tree-nav__item.is-expandable::before {
        border-left: 1px solid #333;
        content: "";
        height: 100%;
        left: 0.8rem;
        position: absolute;
        top: 2.4rem;
        height: calc(100% - 2.4rem);
    }

    .tree-nav__item .tree-nav__item {
        margin-left: 2.4rem;
    }

    .tree-nav__item.is-expandable[open] > .tree-nav__item-title::before {
        content: "\2212";
        border: #000046;
        border-radius: 50px;
        /* transform: rotate(90deg); */
    }

    .tree-nav__item.is-expandable > .tree-nav__item-title {
        padding-left: 2.4rem;
    }

        .tree-nav__item.is-expandable > .tree-nav__item-title::before {
            position: absolute;
            will-change: transform;
            transition: transform 300ms ease;
            color: #000046;
            font-size: 1.1rem;
            content: "\002B";
            left: 0;
            display: inline-block;
            width: 1.6rem;
            text-align: center;
        }

.tree-nav__item-title {
    cursor: pointer;
    display: block;
    outline: 0;
    color: #000046;
    font-size: 1.5rem;
    line-height: 3.2rem;
}

    .tree-nav__item-title .head {
        font-size: 2rem;
        text-align: right;
    }

    .tree-nav__item-title::-webkit-details-marker {
        display: none;
    }