* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
}

.hero {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.hero video {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.overlay {
    position: absolute;
    inset: 0;
    background: transparent;
}

.site-header {
    position: sticky;
    top: 0;

    width: 100%;
    z-index: 100;

    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 25px 60px;

    background: rgba(255,255,255,1);
}

.hero .site-header {

    position: fixed;
    top: 0;
    left: 0;
    background: rgba(255,255,255,1);
}


.logo {
    height: 60px;
}

nav a {
    color: #444;
    text-decoration: none;
    margin-left: 12px;
    font-size: 12px;
    letter-spacing: 1px;
    font-weight: 500;
}

.content {
    position: absolute;
    z-index: 5;
    color: white;
    left: 10%;
    top: 55%;
    transform: translateY(-50%);
    max-width: 800px;
}

.content h1 {
    margin-bottom: 40px;
}

.kor{
    font-family: "Nanum Gothic", sans-serif;
    font-size: 20px;
    line-height: 2;
}

.eng{
    margin-top: 50px;
    font-family: "Times New Roman", Times, serif;
    font-style: italic;
    font-size: 18px;
    line-height: 1.8;
}

.author{
    margin-top: 15px;
}


.intro {
    padding:100px 20px;
    text-align:center;
}

.intro h1 {
    font-size:42px;
    letter-spacing:4px;
    margin-bottom:60px;
}

.intro h2 {
    font-size:28px;
    margin-bottom:50px;
}

.intro p {
    max-width:850px;
    margin:0 auto 25px;
    line-height:2;
}

.about-page {
    background:#f5f5f5;
}

.about-page p {
    text-align:left;
}
.profile-section {
    max-width: 900px;
    margin: 100px auto;
    padding: 0 20px;
}

.profile-section h2 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 50px;
    letter-spacing: 1px;
}

.profile {
    padding: 30px 0;
    border-bottom: 1px solid #ddd;
}

.profile h3 {
    font-size: 22px;
    margin-bottom: 20px;
}

.profile p {
    line-height: 2;
    font-size: 15px;
    color: #444;
}

.profile-item {
    margin-bottom: 35px;
}

.profile-item h4 {
    font-size: 16px;
    margin-bottom: 12px;
    font-weight: 600;
}



.activity-page {
    background:#fafafa;
    padding:60px 20px;
}

.activity-list {
    max-width:1000px;
    margin:100px auto;
    padding:0 20px;
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:30px;
}

.activity-card {
    border:1px solid #ddd;
    padding:35px;
}

.activity-card h2 {
    font-size:20px;
    margin-bottom:20px;
}

.activity-card > p {
    font-size:16px;
    line-height:1.8;
}
.activity-info {
    margin-bottom:20px;
    font-size:16px;
    line-height:1.8;
    color:#555;
}

.activity-info p {
    margin:0;
}



.site-footer {
    padding: 30px 20px 20px;
    border-top: 1px solid #ddd;
    text-align: center;
    font-size: 13px;
    color: #555;
}

.footer-info {
    line-height: 1.8;
}

.footer-info strong {
    font-size: 16px;
    letter-spacing: 2px;
}

.divider {
    margin: 0 10px;
}

.footer-info a {
    color: inherit;
    text-decoration: none;
}

.footer-policy {
    margin-top: 10px;
    font-size: 12px;
}

.footer-copy {
    margin-top: 8px;
    font-size: 11px;
}


@media (max-width: 768px) {

.site-header {
    padding: 20px;
}

.logo {
    height: 40px;
}

nav a {
    margin-left: 10px;
    font-size: 11px;
}


.site-footer {
    padding: 30px 20px 20px;
}
    
.divider {
    margin: 0 5px;
}

}