.mobile_header {
    display: none;
}

.mobile_navigation {
    display: none;
}  

@media (max-width: 321px) {
    .header_pc {
        display: none;
    }
    .mobile_header {
        display: block;
    }
    .mobile_nav_logo {
        position: absolute;
        left: 10px;
    }
    .mobile_nav_btn {
        position: absolute;
        left: 265px;
        top: 27px;
        background-color: rgba(240, 248, 255, 0);
        border: none;
        z-index: 101;
    }
    .mobile_navigation.active {
        position: absolute;
        display: block;
        left: 0px;
        width: 100%;
        height: 100%;
        background-color: #6c6c6c;
        color: white;
        font-family: Rubik;
        z-index: 100;
    }
    .mb_nv_title {
        position: absolute;
        left: 15px;
    }
    .mb_nv_list_block {
        position: absolute;
        width: 100%;
        height: 500px;
        top: 70px;
        z-index: 101;
    }
    .mb_nv_ls_item {
        position: relative;
        display: flex;
        left: 15px;
        font-size: x-large;
    }
}

@media (min-width: 321px) and (max-width: 375px) {
    .header_pc {
        display: none;
    }
    .mobile_header {
        display: block;
        width: 100%;
    }
    .mobile_nav_logo {
        position: absolute;
        left: 10px;
    }
    .mobile_nav_btn {
        position: absolute;
        left: 315px;
        top: 27px;
        background-color: rgba(240, 248, 255, 0);
        border: none;
        z-index: 101;
    }
    .mobile_navigation.active {
        position: absolute;
        display: block;
        left: 0px;
        width: 110.5%;
        height: 110.5%;
        background-color: #6c6c6c;
        color: white;
        font-family: Rubik;
        z-index: 100;
    }
    .mb_nv_title {
        position: absolute;
        left: 15px;
    }
    .mb_nv_list_block {
        position: absolute;
        width: 100%;
        height: 500px;
        top: 70px;
        z-index: 101;
    }
    .mb_nv_ls_item {
        position: relative;
        display: flex;
        left: 15px;
        font-size: x-large;
    }
}

@media (min-width: 375px) and (max-width: 426px) {
    .header_pc {
        display: none;
    }
    .mobile_header {
        display: block;
        width: 100%;
    }
    .mobile_nav_logo {
        position: absolute;
        left: 10px;
    }
    .mobile_nav_btn {
        position: absolute;
        left: 365px;
        top: 27px;
        background-color: rgba(240, 248, 255, 0);
        border: none;
        z-index: 101;
    }
    .mobile_navigation.active {
        position: absolute;
        display: block;
        left: 0px;
        width: 110.5%;
        height: 110.5%;
        background-color: #6c6c6c;
        color: white;
        font-family: Rubik;
        z-index: 100;
    }
    .mb_nv_title {
        position: absolute;
        left: 15px;
    }
    .mb_nv_list_block {
        position: absolute;
        width: 100%;
        height: 500px;
        top: 70px;
        z-index: 101;
    }
    .mb_nv_ls_item {
        position: relative;
        display: flex;
        left: 15px;
        font-size: x-large;
    }
}