.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    position: relative;
}

.header .nav_list {
    display: flex;
    gap: 40px;
}

.header .nav_list .nav_btn {
    font-family: Rubik;
    font-size: 16px;
    font-weight: 400;
    line-height: 19.2px;
    color: #42424A;
    background: none;
    padding: 0;
    border: none;
    cursor: pointer;
}

.header .case_study_btn {
    font-family: Rubik;
    font-size: 19px;
    font-weight: 500;
    line-height: 22.8px;
    text-align: left;
    text-underline-position: from-font;
    text-decoration-skip-ink: none;
    color: #42424A;
    border: 1px solid #EEEEEE;
    box-shadow: 0px 4px 8px -1px rgba(17, 8, 0, 0.04), 0px 2px 4px rgba(17, 8, 0, 0.04), 0px 1px 2px rgba(17, 8, 0, 0.04);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.header .mobile_menu {
    display: none;
}

.header .case_study_btn::before {
    content: "";
    width: 16px;
    aspect-ratio: 1/1;
    flex-shrink: 0;
    border-radius: 100%;
    background-color: #19E36A;
}

.sharer_wrap {
    position: absolute;
    right: var(--outer-pad);
    top: 67px;
}

@media screen and (max-width: 980px) {
    .header .case_study_btn {
        display: none;
    }
}

@media screen and (max-width: 680px) {
    .header .mobile_menu {
        display: block;
        background: none;
        border: none;
    }

    .header .nav_list {
        display: flex;
        flex-direction: column;
        background: #fff;
        border: 1px solid #F0F0F0;
        box-shadow: 0px 8px 16px -2px rgba(17, 8, 0, 0.04), 0px 4px 8px -1px rgba(17, 8, 0, 0.04), 0px 2px 4px rgba(17, 8, 0, 0.04);
        border-radius: 12px;
        position: absolute;
        top: 30px;
        left: 0;
        width: 100%;
        gap: 0;
        opacity: 0;
        transition: opacity 0.2s, top 0.2s;
        z-index: 10;
        pointer-events: none;
        width: calc(100% - 40px);
        margin: 0px 20px;
    }

    .header.js-mobile-menu .nav_list {
        opacity: 1;
        top: 40px;
        pointer-events: all;
    }

    .header .nav_list .nav_btn {
        text-align: left;
        width: 100%;
        padding: 10px 20px;
    }

    .sharer_wrap {
        top: 40px;
        right: 20px;
    }
}