html {
    scroll-behavior: smooth;
}

* {
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans KR', sans-serif, 'Bebas Neue', cursive, 'Poppins', sans-serif;
}

.header {
    min-height: 100vh;
    width: 100%;
    background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)), url("/resource/HEADER-5.webp");
    background-position: center;
    background-size: cover;
    position: relative;
}

nav {
    display: flex;
    padding: 2% 6%;
    justify-content: space-between;
    align-items: center;
}

    nav img {
        width: 150px;
        height: auto;
    }

.nav-links {
    flex: 1;
    text-align: right;
}

    .nav-links ul li {
        list-style: none;
        display: inline-block;
        padding: 8px 12px;
        position: relative;
    }

        .nav-links ul li a {
            color: #e2f0fb;
            text-decoration: none;
            font-size: 13px;
        }

        .nav-links ul li::after {
            content: '';
            width: 0%;
            height: 2px;
            background: #e2f0fb;
            display: block;
            margin: auto;
            transition: 0.5s;
        }

        .nav-links ul li:hover::after {
            width: 100%;
        }


.logo {
    width: 90%;
    color: #fff;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    text-align: center;
}


.text-box {
    width: 90%;
    color: #fff;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    text-align: center;
}

    .text-box h1 {
        font-size: 200px;
        font-family: 'Bebas Neue';
        letter-spacing: 0.2rem;
        margin-bottom: -60px;
        color: #fff;
    }

    .text-box h2 {
        font-size: 70px;
        font-family: 'Poppins';
        font-weight: 800;
        letter-spacing: 0.2rem;
        margin: 0px 0 10px;
        margin-bottom: -10px;
    }

    .text-box p {
        font-size: 21px;
        font-family: 'Noto Sans KR';
        font-weight: 200;
        letter-spacing: 0.2rem;
        margin-bottom: 40px;
        color: #fff;
    }

.hero-btn {
    display: inline-block;
    text-decoration: none;
    color: #fff;
    border: 1px solid #fff;
    padding: 12px 34px;
    font-size: 13px;
    background: transparent;
    position: relative;
    cursor: pointer;
}

    .hero-btn:hover {
        border: 1px solid #2f56a5;
        background: #2f56a5;
        transition: 1s;
        color: #e2f0fb;
    }

nav .fa {
    display: none;
}

@media (max-width: 700px) {
    .text-box h1 {
        font-size: 150px;
        margin-bottom: -40px;
    }

    .text-box h2 {
        font-size: 50px;
    }

    .text-box p {
        font-size: 13.5px;
    }

    .text-box h1 img {
        width: 120px;
        margin-top: 20px;
        height: auto;
    }

    .nav-links ul li {
        display: block;
    }

    .nav-links {
        position: absolute;
        background: #2f56a5;
        color: #e2f0fb;
        height: 100vh;
        width: 200px;
        top: 0;
        right: -200px;
        text-align: left;
        z-index: 2;
        transition: 1s;
    }

    nav .fa {
        display: block;
        color: #e2f0fb;
        margin: 10px;
        font-size: 22px;
        cursor: pointer;
    }

    .nav-links ul {
        padding: 30px;
    }
}

@media (max-width: 400px) {
    .text-box h1 {
        font-size: 110px;
        margin-bottom: -40px;
    }

    .text-box h2 {
        font-size: 35px;
    }

    .text-box p {
        font-size: 10px;
    }

    nav img {
        width: 120px;
        margin-top: 20px;
        height: auto;
    }
}

/* -- Introduction --*/
#introduction {
    width: 80%;
    margin: auto;
    text-align: center;
    padding-top: 100px;
}

h1 {
    font-size: 36px;
    font-weight: 600;
    font-family: 'Poppins';
    color: #2f56a5;
}

p {
    color: #777;
    font-size: 14px;
    font-weight: 300;
    line-height: 22px;
    padding: 10px;
}

.row {
    margin-top: 5%;
    display: flex;
    justify-content: space-between;
}

.course-col {
    flex-basis: 31%;
    background: #e2f0fb;
    border-radius: 10px;
    margin-bottom: 5%;
    padding: 20px 12px;
    box-sizing: border-box;
    transition: 0.5s;
}

h3 {
    text-align: center;
    font-weight: 600;
    margin: 10px 0;
    color: #2f56a5;
}

.course-col:hover {
    box-shadow: 0 0 20px 0px rgba(0,0,0,0.2);
}

@media (max-width: 700px) {
    .row {
        flex-direction: column;
    }
}

/* -- Download and User Guide --*/
#download {
    width: 80%;
    margin: auto;
    text-align: center;
    padding-top: 50px;
}

.campus-col {
    flex-basis: 32%;
    border-radius: 10px;
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
}

    .campus-col img {
        width: 100%;
        height: auto;
    }

.layer {
    background: transparent;
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    transition: 0.5s;
}

    .layer:hover {
        background: rgba(47,86,165,0.7);
    }

    .layer h3 {
        width: 100%;
        font-weight: 500px;
        color: #e2f0fb;
        font-size: 55px;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        position: absolute;
        opacity: 0;
        transition: 0.5s;
        font-family: 'Poppins';
    }

    .layer:hover h3 {
        bottom: 49%;
        opacity: 1;
    }

@media (max-width: 700px) {
    .layer h3 {
        font-size: 40px;
    }
}

/* -- About Us --*/
#aboutus {
    width: 80%;
    margin: auto;
    text-align: center;
    padding-top: 100px;
}

.facilities-col {
    flex-basis: 31%;
    border-radius: 10px;
    margin-bottom: 5%;
    text-align: left;
}

    .facilities-col img {
        width: 100%;
        height: auto;
        border-radius: 10px;
    }

    .facilities-col p {
        padding: 0;
        margin-bottom: 10px;
    }

    .facilities-col h3 {
        margin-top: 16px;
        margin-bottom: 15px;
        text-align: left;
    }

    .facilities-col a {
        font-size: 12px;
        text-decoration: none;
        color: #2f56a5;
        font-weight: 600;
    }

    .facilities-col:hover a {
        color: #e2f0fb;
    }

/* -- Contact Us --*/

#contactus {
    margin: 100px auto;
    width: 80%;
    background-image: linear-gradient(rgba(0,0,0,0.7),rgba(0,0,0,0.7)),url("/resource/contactus.webp");
    background-position: center;
    background-size: cover;
    border-radius: 10px;
    text-align: center;
    padding: 100px 0;
}

    #contactus h1 {
        color: #fff;
        margin-bottom: 40px;
        padding: 0;
    }

@media (max-width: 700px) {
    #contactus h1 {
        font-size: 20px;
    }
}

/* -- Footer --*/

#footer {
    width: 100%;
    text-align: center;
    padding: 10px 0;
    background: #2f56a5;
}

    #footer p {
        margin-bottom: 25px;
        margin-top: 20px;
        font-weight: 300;
        color: #e2f0fb;
    }

/* -- Download Page --*/

.sub-header {
    height: 50vh;
    width: 100%;
    background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url("/resource/download.webp");
    background-position: center;
    background-size: cover;
    text-align: center;
    color: #fff;
}

    .sub-header h1 {
        margin-top: 100px;
        color: #fff;
    }

#down {
    width: 80%;
    margin: auto;
    padding-top: 0px;
    padding-bottom: 50px;
}

.about-col {
    flex-basis: 42%;
    padding: 30px 2px;
}

    .about-col img {
        width: 100%;
        height: auto;
    }

    .about-col h1 {
        padding-top: 0;
        font-size: 50px;
        color: #2f56a5;
    }

    .about-col h2 {
        padding: 10px 0 25px;
        text-align: justify;
        font-size: 30px;
        font-weight: 400
    }

    .about-col p {
        padding: 8px 0 25px;
        text-align: justify;
        width: 72%;
    }

.green-btn {
    border: 1px solid #2f56a5;
    background: transparent;
    color: #2f56a5;
    font-size: 30px;
    font-weight: 700;
}

    .green-btn:hover {
        color: #e2f0fb;
    }

@media (max-width: 700px) {
    .about-col h1 {
        font-size: 28px;
    }

    .about-col h2 {
        font-size: 16px;
    }

    .about-col p {
        padding: 8px 0 25px;
        text-align: justify;
        width: 76%;
    }
}

/* -- User Guide Page --*/

.pro-header {
    height: 50vh;
    width: 100%;
    background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url("/resource/introduction.webp");
    background-position: center;
    background-size: cover;
    text-align: center;
    color: #fff;
}

    .pro-header h1 {
        margin-top: 100px;
        color: #fff;
    }

#user {
    width: 80%;
    margin: auto;
    padding-top: 0px;
    padding-bottom: 50px;
}

.user-col {
    flex-basis: 42%;
    padding: 30px 2px;
}

    .user-col video {
        width: 100%;
        height: auto;
    }

    .user-col h1 {
        padding-top: 0;
        font-size: 30px;
        color: #2f56a5;
    }

    .user-col h2 {
        padding: 10px 0 25px;
        text-align: justify;
        font-size: 20px;
        color: #2f56a5;
    }

    .user-col .far {
        color: #333;
        padding: 10px 50px 10px 0px;
    }

    .user-col h3 {
        padding: 10px 0 10px;
        text-align: justify;
        font-size: 14px;
        font-weight: 300;
        color: #000;
    }

    .user-col p {
        padding: 8px 0 25px;
        text-align: justify;
    }

#shop {
    width: 80%;
    margin: auto;
    text-align: center;
    padding-top: 100px;
}

.shop-col {
    flex-basis: 22%;
    border-radius: 10px;
    margin-bottom: 5%;
    text-align: left;
}

    .shop-col img {
        width: 100%;
        height: auto;
        border-radius: 10px;
    }

    .shop-col p {
        padding: 0;
        margin-bottom: 10px;
    }

    .shop-col h3 {
        margin-top: 16px;
        margin-bottom: 15px;
        text-align: left;
    }

    .shop-col a {
        font-size: 12px;
        text-decoration: none;
        color: #2f56a5;
        font-weight: 600;
    }

    .shop-col:hover a {
        color: #e2f0fb;
    }