@media (max-width: 1000px) {
    /* container */
    #body_container {
        margin: 50px 0 0 50px;
    }
    .container {
        padding: 10px;
    }
    /* button */
    .button_container {
        display: flex;
        flex-wrap: wrap;
    }
    .button_white {
        width: 100%;
    }
    /* header */
    header {
        height: 50px;
        padding: 5px;
        background-color: white;
        box-sizing: border-box;
        position: fixed;
        top: 0;
        left: 50px;
        right: 0;
        display: flex;
        z-index: 50;
    }
    header img {
        height: 40px;
        padding: 10px;
        box-sizing: border-box;
    }
    #header_menu {
        display: none;
    }
    /* sidebar */
    #sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        background-color: white;
        width: 50px;
        z-index: 50;
    }
    #sidebar img {
        width: 100%;
        padding: 5px;
        box-sizing: border-box;
    }
    #sidebar p {
        writing-mode: vertical-rl;
        line-height: 50px;
        font-size: 25px;
        margin: 10px 0 0 0;
        color: #a9a9a9;
    }
    /* h_menu */
    #h_menu_button {
        display: block;
        z-index: 100;
        position: fixed;
        top: 0;
        right: 0;
        height: 50px;
        padding: 5px;
    }
    #h_menu_button i {
        color: black;
        display: block;
        font-size: 40px;
    }
    #h_menu {
        z-index: 101;
        width: 100vw;
        height: 100vh;
        position: fixed;
        top: 0;
        left: 0;
        background: rgb(112, 108, 170);
        background: linear-gradient(0deg, rgba(112, 108, 170, 0.7829453812316716) 0%, rgba(245, 245, 245, 1) 100%);
        padding: 20px;
        box-sizing: border-box;
    }
    #h_menu a {
        color: black;
        text-decoration: none;
        margin-bottom: 15px;
        display: block;
        font-size: 1.3rem;
        border-bottom: 1px solid #47266e;
        border-left: 5px solid #47266e;
        box-sizing: border-box;
        padding: 0 0 5px 5px;
    }
    #h_menu i {
        margin-right: 10px;
        color: #47266e;
    }
    #h_menu_logo_icon {
        display: block;
        width: 20%;
        margin: 15px 0;
    }
    #h_menu_logo_title {
        display: block;
        width: 50%;
        margin: 20px 0;
    }
}