/* 헤더 숨김 */
header {
    display: none;
}

body {
    background-color: #121212;
    margin: 0;
}

/* GNB */
.academy-gnb {
    display: flex;
    justify-content: flex-start;
    gap: 60px;
    align-items: center;
    padding: 15px 20px;
    background-color: #121212;
    color: #ffffff;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    border-bottom: 1px solid #333;
    box-sizing: border-box;
}

body {
    padding-top: 61px;
}

@media (max-width: 1130px) {
    body {
        padding-top: 78px;
    }
}


.gnb-logo {
    display: flex;
    align-items: center;
}

.gnb-logo img {
    max-width: 100%; 
    height: auto;
    max-height: 30px; 
}

.gnb-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 20px;
}

.gnb-menu li a {
    color: #aaa;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    padding: 5px 10px;
    transition: all 0.2s ease;
}

.gnb-menu li a:hover {
    color: #fff;
}

.gnb-menu li.active a {
    color: #fff;
    font-weight: bold;
    border-bottom: 2px solid #fff;
}

.video-wrap {
    width: 100%;
    background: #121212;
}

.iframe-wrap {
    width: 100%;
    height: calc(100vh - 61px); 
}

.iframe-wrap.main-page {
    /* 메인 페이지 높이 */
    height: 7000px;
    min-height: 100vh;
}


.iframe {
    width: 100%;
    height: 100%;
    border: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.iframe.no-scroll {
    /* 메인 페이지 스크롤 비활성화 */
    overflow: hidden;
}


@media (max-width: 1130px) {
    header {
        display: none;
    }
    
    .academy-gnb {
        flex-direction: column;
        gap: 10px;
        padding: 10px;
        box-sizing: border-box; 
    }

    .gnb-logo {
        max-width: 100%; 
        justify-content: center;
    }

    .gnb-logo img {
        max-width: 100%; 
        height: auto;
    }

    .iframe-wrap {
        height: calc(100vh - 78px);
    }

    .iframe-wrap.main-page {
        /* 메인 페이지 모바일 높이 */
        height: 9800px;
    }
    
    .iframe {
        overflow: hidden;
    }
}