#mobile-toolbar{
    display: none;
    width: 100%;
    height: 50px;
    position: absolute;
    top: 0;
    left: 0;
    background-color: #fff;
    border-bottom: 1px solid #d9d9d9;
    z-index: 100000;
}

#open-menu {
    height: 30px;
    width: 30px;
    position: absolute;
    left: 10px;
    top: 10px;
    background-image: url(/source-img/bars-solid.svg);
    background-position: center;
    background-repeat: no-repeat;
    border: none;
    background-color: transparent;
}

#app-name {
    font-size: 1.125rem;
    position: absolute;
    left: 50%;
    top: 50%;
    font-weight: 500;
    transform: translate(-50%, -50%);
    cursor: default;
}

#open-search-menu {
    height: 26px;
    width: 26px;
    position: absolute;
    right: 12px;
    top: 12px;
    background-color: transparent;
}

.darkFilter {
    filter: brightness(0.5);
}

@media (max-width: 769px){
    .sidebar {
        width: 0px;
    }
    #mobile-toolbar {
        display: block;
    }
    .main-content {
        position: absolute;
        height: calc(100% - 50px);
        top: 50px;
        width: 100%;
        left: 0;
        transition: ease-in-out 0.3s;
        background-color: #f8fafb;
        z-index: 1;
        padding: 0;
    }
    #direction-board {
        width: 100%;
        height: calc(100% + 46px);
        right: 0;
        top: -46px;
        border-radius: 0;
        border: none;
        box-shadow: none;
    }
    #HNUE-introduction, #product-introduction, #infomation-pages, #donate-div, #support-div {
        position: absolute;
        width: 100%;
        height: 100%;
        border-radius: 0;
        border: none;
        top: 0;
        left: 0;
        box-shadow: none;
    }
    .infoDiv {
        position: absolute;
        width: 100%;
        height: 100%;
        min-width: 0;
        border-radius: 0;
        border: none;
        top: 0;
        left: 0;
        transform: translate(0, 0);
        box-shadow: none;
    }
    #directionArrow {
        display: none;
    }
    .sidebar.show + .main-content {
        width: 100%;
        left: 0px;
    }
    .main-content.show {
        width: 100%;
        left: 0px;
    }
    #enter-post {
        width: calc(100% - 10px); 
        left: 5px; 
        top: 55px;
    }
    #social-network-toolbar {
        position: absolute;
        width: 100%;
        height: 50px;
        top: 0;
        left: 0;
        display: none;
        background-color: #fff;
        z-index: 1000000000;
        border: 1px solid #e4e6e9;
    }
    #social-network-div {
        left: 0;
        width: 100%;
        top: 0;
        height: 100%;
    }
    #post-div {
        width: 98%;  
        left: 1%; 
        top: 5px;
    }
    #posts-container {
        width: 100%; 
        border-radius: 15px; 
        height: auto; 
        background-color: transparent; 
        position: relative; 
        left: 0; 
        margin-top: 57px;
    }
    #show-more {
        margin-top: 64px;
        width: 98%;
    }
    .show-post {
        width: 98%;
        left: 1%;
        top: 5px;
    }
    .show-post .post-image {
        top: 160px;
    }
    .emojionearea .emojionearea-button.active+.emojionearea-picker-position-top {
        margin-right: -40px;
    }
    .scroll-to-top {
        bottom: 10px;
        left: auto;
        right: 10px;
    }
    #menu-btn {
        display: none;
    }
    #hnue-img-2 {
        display: none;
    }
}

@media (max-width: 400px){
    #notification-div {
        position: absolute;
        width: 100%;
        height: 100%;
        top: 50px;
        background-color: #fff;
        z-index: 1000000000;
        border-radius: 0;
        border: 1px solid #e4e6e9;
    }
}