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

body {
    font-family: 'Noto Sans KR', 'Roboto', sans-serif;
    line-height: 1.6;
    background-color: #ffffff;
    color: #333333;
}

/* 상단 유틸리티 메뉴 */
.top-bar {
    background-color: #f8f9fa;
    padding: 8px 0;
    border-bottom: 1px solid #e9ecef;
}

.top-bar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: flex-end;
    gap: 20px;
}

.top-bar a {
    color: #666;
    text-decoration: none;
    font-size: 12px;
    padding: 4px 8px;
    transition: color 0.2s;
}

.top-bar a:hover {
    color: #333;
}

/* 메인 헤더 */
/* 수정된 메인 헤더 */
.header {
    background-color: #ffffff;
    padding: 20px 0 40px;
    border-bottom: 1px solid #f0f0f0;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.title-content {
    text-align: center;
}

.professor-name-ko {
    font-size: 50px;
    font-weight: 900;
    color: #2c3e50;
    margin-bottom: -2px;
    letter-spacing: -2px;
    font-family: 'Noto Sans KR', sans-serif;
}

.chinese-name {
    font-size: 24px;
    color: #95a5a6;
    margin-bottom: 0px;
    font-weight: 400;
}

.professor-name-en {
    font-size: 28px;
    font-weight: 500;
    color: #2c3e50;
    font-family: 'Roboto', sans-serif;
    position: relative;
    display: inline-block;
}

.professor-name-en::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 4px;
    background-color: #f39c12;
}

/* 반응형 디자인 추가 */
@media (max-width: 768px) {
    .professor-name-ko {
        font-size: 48px;
    }
    
    .professor-name-en {
        font-size: 24px;
    }
    
    .professor-name-en::after {
        width: 150px;
    }
}

@media (max-width: 480px) {
    .professor-name-ko {
        font-size: 36px;
    }
    
    .professor-name-en {
        font-size: 20px;
    }
    
    .professor-name-en::after {
        width: 120px;
    }
}

/* 메인 네비게이션 */
.main-nav {
    background-color: #031c2f;
    opacity: 0.5;
    padding: 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: center;
    gap: 120px;
}

.nav-item {
    color: #ffffff;
    text-decoration: none;
    padding: 20px 0;
    font-size: 20px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    border-bottom: 3px solid transparent;
}

.nav-item>a{
    text-decoration: none;
    color: #ffffff;
}

.site-title {
    background-color: #f8f9fa;
    padding: 15px 30px;
    border: 2px solid #333;
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    flex-grow: 1;
    min-width: 300px;
}

/* 네비게이션 영역 */
.navigation {
    background-color: #343a40;
    padding: 15px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
}

.nav-item {
    color: white;
    text-decoration: none;
    padding: 12px 25px;
    cursor: pointer;
    transition: background-color 0.3s;
    border-radius: 5px;
    white-space: nowrap;
}

.nav-item:hover {
    background-color: #495057;
}

/* 메인 콘텐츠 영역 */
.main-content {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.photo-section {
    background-color: white;
    border: 3px solid #333;
    min-height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.photo-section img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 400px;
}

.dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #666;
}

/* 푸터 영역 */
.footer {
    background-color: #001b2f;
    max-height: 120px;
    color: white;
    padding: 30px 0;
    padding-top: 15px;
    margin-top: 15px;
    position: relative;
}

.footer-container {
    /* max-height: 80px; */
    margin: 0 auto;
}

.footer-info {
    margin-bottom: 15px;
}

.footer-info h3 {
    font-size: 16px;
    margin-bottom: 5px;
    color: #ffc107;
}

.footer-bottom {
    border-top: 1px solid #495057;
    padding-top: 20px;
    text-align: center;
    color: #adb5bd;
}

.foot_text {
    margin-left: 50px;
    font-size: 12px;
}

.school-logo {
    height: 100px;
    width: 100px;
    display: flex;
    position : absolute;
    top : 0px;
    right : 50px;
}

.school-logo img {
    height: 100%;
    width: 100px;
    object-fit: contain;
}

/* 반응형 디자인 */
/* @media (max-width: 768px) {
    .header-container {
        padding: 0 10px;
        gap: 10px;
    }

    .logo img, .school-logo img {
        max-height: 40px;
        max-width: 80px;
    }

    .site-title {
        padding: 10px 15px;
        font-size: 16px;
        min-width: 200px;
    }

    .nav-container {
        gap: 20px;
        padding: 0 10px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-item {
        padding: 8px 15px;
        font-size: 14px;
    }

    .photo-section {
        min-height: 300px;
    }

    .photo-section img {
        min-height: 300px;
    }
} */


/* 메인 이미지 섹션 */
.hero-section {
    width: 100%;
    height: 630px;
    overflow: hidden;
    position: relative;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.3));
    padding: 40px 0 20px;
} 

.slider{
    width: 100%;
    height: 630px;
    position:relative;
    margin : 0 auto;
    animation: slide 15s infinite;
}

.slider input[type=radio]{
    display: none;
}

ul.imgs{
    padding : 0;
    margin : 0;
}

ul.imgs li{
    width: 100%;
    height: 100%;
    position: absolute;
    opacity: 0;
    list-style: none;
    padding:0;
    margin:0;
    transition-delay: 0.9s;
}

.bullets{
    position:absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 20px; 
    z-index: 2;
}

.bullets label{
    display: inline-block;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.55);
    width: 20px; 
    height: 20px;
    cursor: pointer;
}

.slider input[type=radio]:nth-child(1):checked ~ .bullets > label:nth-child(1) { 
    background-color: #fff;
}
.slider input[type=radio]:nth-child(2):checked ~ .bullets > label:nth-child(2) {
    background-color: #fff;
}
.slider input[type=radio]:nth-child(3):checked ~ .bullets > label:nth-child(3) {
    background-color: #fff;
}

.slider input[type=radio]:nth-child(1):checked ~ ul.imgs > li:nth-child(1) {
    opacity: 1;
    transition: 1s;
    Z-index: 1
}
.slider input[type=radio]:nth-child(2):checked ~ ul.imgs > li:nth-child(2) {
    opacity: 1;
    transition: 1s;
    z-index: 1;
}
.slider input[type=radio]:nth-child(3):checked ~ ul.imgs > li:nth-child(3) {
    opacity: 1;
    transition: 1s;
    z-index: 1;
}

/* 컨텐츠 섹션 */
.content-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 20px;
}

.lab-title-main {
    font-size: 36px;
    font-weight: 600;
    color: #333;
    margin-bottom: 60px;
    font-family: 'Roboto', sans-serif;
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    align-items: start;
}

/* About Us 섹션 */
.about-section {
    background-color: #ffffff;
    margin-left: 60px;
}

.about-section h2 {
    font-size: 30px;
    font-weight: 600;
    color: #333;
    margin-bottom: 30px;
    font-family: 'Roboto', sans-serif;
}

.research-areas h3 {
    font-size: 24px;
    font-weight: 600;
    color: #d32f2f;
    margin-bottom: 20px;
}

.research-description {
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.research-list {
    list-style: none;
    padding: 0;
    margin-left: 10px;
    font-size: 14px;
}

.research-list li {
    color: #666;
    margin-bottom: 18px;
    padding-left: 20px;
    position: relative;
}

.research-list li::before {
    content: '·';
    color: #d32f2f;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* 연구실 정보 박스 */
.lab-info {
    max-width: 330px;
    background-color: #d32f2f;
    color: white;
    padding: 20px 35px;
    border-radius: 8px;
    height: fit-content;
    margin-top: 70px;
}

.lab-info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.lab-info .info-item {
    margin-bottom: 25px;
}

.lab-info .label {
    font-weight: 600;
    margin-bottom: 8px;
    display: block;
}

.lab-info .value {
    color: #ffebee;
    line-height: 1.6;
}

/* 반응형 디자인 */
/* @media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .nav-container {
        gap: 40px;
    }

    .lab-title {
        font-size: 20px;
    }
}

@media (max-width: 768px) {
    .top-bar-container {
        padding: 0 15px;
        gap: 15px;
    }

    .header-container {
        padding: 0 15px;
        gap: 15px;
    }

    .logo-section {
        gap: 10px;
    }

    .lab-title {
        font-size: 16px;
    }

    .nav-container {
        gap: 20px;
        padding: 0 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-item {
        padding: 15px 10px;
        font-size: 14px;
    }

    .hero-section {
        height: 250px;
    }

    .content-section {
        padding: 40px 15px;
    }

    .lab-title-main {
        font-size: 28px;
        text-align: center;
    }

    .lab-info {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .logo img {
        height: 40px;
    }

    .school-logo img {
        height: 35px;
    }

    .lab-title {
        font-size: 14px;
    }

    .nav-container {
        gap: 15px;
        padding: 0 10px;
    }

    .nav-item {
        padding: 12px 8px;
        font-size: 13px;
    }

    .top-bar {
        display: none;
    }
} */