body {
    margin: 0;
}

.header_container {
    position:relative;
    width: 100%;
    align-items: center;
    padding: 0;
    /*display: flex;
    flex-direction: column*/
    transition: 0.3s;
}
.name_head {
    display: flex; 
    justify-content: center;  
    font-size: 2.5rem; 
    font-weight: bold;
    align-self: center;
    margin: 30px;
}

.menu_contents {
    padding: 0;
    list-style-type: none;
    display: flex;
    justify-content: space-evenly;
    flex-direction: row;
    align-items: center;
    z-index: 1;
    transition: 0.5s;
}
.menu_content {
    display: block;
    font-size: 1.5rem;
    color: black;
    padding: 15px;
    text-decoration: none;
    list-style-type: none;
    transition: 0.3s;
}
.menu_bold {
    font-weight: bold;
}

a:hover {
    color:rgb(229, 87, 10);

}
.top_header_container {
    position: relative;
    margin-top: 0;
    width: 100%;
    display:flex;
    justify-content: space-around;
    align-items: center;
}
.navigation {
    margin: 0;
}
.hamburger_system_na {
    padding-top: 10px;
    padding-right: 10px;
    z-index: 2;
    /*display:none;*/
}
.hamburger {
    position: relative;
    width: 30px;
    height: 4px;
    background: black;
    border-radius: 10px;
    cursor: pointer;
    transition: 0.3s;
}
.hambrger_system {
    padding-top: 10px;
    padding-right: 10px;
    z-index: 2;
}

.hamburger:before, 
.hamburger:after {
    content: "";
    position: absolute;
    height: 4px;
    right: 0;
    background: black;
    border-radius: 10px;
    transition: 0.3s;
}
.hamburger:before {
    top: -10px;
    width: 20px;
}
.hamburger:after {
    top: 10px;
    width: 25px;
}

.toggle-menu {
    position: absolute;
    width: 30px;
    height: fit-content;
    z-index: 3;
    cursor: pointer;
    opacity: 0;
}

.hamburger,
.toggle-menu {
    display: none;
}

.top_header_container input:checked ~ .hamburger {
    background: transparent;

}

.top_header_container input:checked ~ .hamburger:before {
    top: 0;
    transform: rotate(-45deg);
    width: 30px;
}

.top_header_container input:checked ~ .hamburger:after {
    top: 0;
    transform: rotate(45deg);
    width: 30px;
}

.top_header_container input:checked ~ .menu_contents {
    right:0;
}

@media screen and (max-width: 992px) {
    .horizontal_line {
        display:none;
    }
    .hamburger,
    .toggle-menu {
        display: block;
    }
    .menu_contents {
        justify-content: start;
        flex-direction: column;
        align-items: center;
        position: fixed;
        top: 0;
        right: -300px;
        background:rgb(170, 170, 170);
        width: 300px;
        height: 100%;
        padding-top: 65px;
    }
    .menu_contents li {
        width: 100%;
    }
    .menu_contents li a {
        padding: 30px;
        font-size: 24px;
        box-shadow: 0 1px rgba(255, 255, 255, 0.1)
        inset;
    }
}

.go_up_btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: rgb(191, 191, 191);
    width: 55px;
    height: 55px;
    display: flex;
    justify-self: center;
    justify-content: center;
}
.arrow_up {
    font-size: 40px;
    font-weight: bold;
    color: black;
    text-decoration: none;
}



/*---------------Body starts here*-------------------------------------------------------*/
.body_content {
    margin: 20px 30px 20px 30px;
    padding-top: 50px;
}

.article_title {
    font-weight: bold;
    font-size: 2rem;
    line-height: 1.5;
}

.heading {
    font-weight: bold;
    font-size: 1.5rem;
}

.text {
    font-size: 20px;
    color: black;
    
}
.text_citation {
    font-size: 20px;
    color: black;
    padding: 30px 30px 30px 60px;
    text-indent: -30px;
    line-height: 1.5;
}

.info_box {
    padding: 50px;
    background-color: #dddddd;

}

.download_box {
    padding: 50px;
    background-color: #eeeeee;
}


@media only screen and (min-width: 768px) {
    .body_content {
        width: 70%;
        margin: 0 auto;
    }
}