@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Noto+Sans+KR:wght@400;500;700&display=swap');

/* ===== 루트 변수 ===== */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #3b82f6;
    --ongoing-color: #3b82f6;
    --completed-color: #10b981;
    --text-color: #34495e;
    --light-bg: #ecf0f1;
    --white: #ffffff;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
    --transition: all 0.3s ease;
}

/* ===== 기본 스타일 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

html {
    scroll-behavior: smooth;
    height: 100%;
}

#footer-container {
    margin-top: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 헤더 및 네비게이션 ===== */
.header {
    background-color: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition);
}

.logo-img {
    height: 50px;
    width: auto;
    display: block;
}

.logo a:hover {
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
    padding: 0.5rem;
}

.nav-menu a:hover {
    color: var(--secondary-color);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 0.4rem;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ===== 드롭다운 메뉴 ===== */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    border: 1px solid var(--light-bg);
    border-radius: 8px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    box-shadow: var(--shadow-md);
    min-width: 210px;
    margin-top: 0.5rem;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: 0.7rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    transition: background-color var(--transition);
}

.dropdown-menu a:hover {
    background-color: var(--light-bg);
    color: var(--secondary-color);
}

/* ===== 히어로 섹션 ===== */
.hero {
    position: relative;
    background-color: #0f172a;
    color: var(--white);
    padding: 60px 20px;
    text-align: center;
    min-height: 820px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-slider {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-slide {
    position: absolute;
    inset: 0;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.2s ease, transform 8s ease;
    transform: scale(1.05);
}

.hero-slide-1 {
    background-image: url('../img/labpic1.png');
}

.hero-slide-2 {
    background-image: url('../img/labpic2.jpg');
}

.hero-slide-3 {
    background-image: url('../img/labpic3.jpg');
}

.hero-slide-4 {
    background-image: url('../img/labpic4.jpg');
}

.hero-slide.active {
    opacity: 1;
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(0, 0, 0, 0.45), rgba(0, 0, 0, 0.45));
    z-index: 1;
}

.hero-content h1 {
    font-size: 6.5rem;
    margin-bottom: 1rem;
    animation: slideDown 0.6s ease;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
    font-family: 'Space Grotesk', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    animation: slideUp 0.6s ease 0.2s both;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.35);
    font-family: 'Noto Sans KR', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 12px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: all var(--transition);
    animation: slideUp 0.6s ease 0.4s both;
    border: 2px solid var(--accent-color);
}

.cta-button:hover {
    background-color: transparent;
    border-color: var(--white);
    color: var(--white);
    transform: translateY(-3px);
}

/* ===== Alert Popup ===== */
.alert-popup {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 8px;
    background-color: #3498db; /* Default info color */
    color: white;
    font-weight: bold;
    z-index: 10000;
    animation: slideIn 0.3s ease;
    max-width: 300px;
}

.alert-popup.success {
    background-color: #27ae60;
}

.alert-popup.error {
    background-color: #e74c3c;
}

.alert-popup.closing {
    animation: slideOut 0.3s ease forwards;
}

/* ===== 영상 섹션 ===== */
.video-section {
    padding: 60px 20px;
    background: linear-gradient(135deg, var(--light-bg), #f8f9fa);
}

.video-section .container {
    max-width: 900px;
}

.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 30px;
    background-color: #000;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 15px;
}

.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 15px;
}

.video-description {
    text-align: center;
    color: var(--text-color);
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
}

/* ===== 어바웃 섹션 ===== */
.about {
    padding: 80px 20px;
    background-color: var(--white);
}

.about-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.about-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--secondary-color);
    border-radius: 2px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
    align-items: center;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 1rem;
    font-size: 1rem;
    line-height: 1.8;
}

/* Research Area cards */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.about-item {
    padding: 1.5rem;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--light-bg);
}

.about-item h2 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.about-item p {
    margin: 0;
    color: var(--text-muted);
    line-height: 1.6;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition);
}

.stat-card:hover {
    transform: translateY(-10px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
}

/* ===== 성과 섹션 ===== */
.achievements {
    padding: 80px 20px;
    background-color: var(--light-bg);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--accent-color);
    border-radius: 2px;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.achievement-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition);
    border-top: 4px solid var(--secondary-color);
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.achievement-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.achievement-card p {
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== 문화 섹션 ===== */
.culture {
    padding: 80px 20px;
    background-color: var(--white);
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.culture-card {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition);
}

.culture-card:hover {
    transform: scale(1.05);
}

.culture-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.culture-card p {
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== 연락처 섹션 ===== */
.contact {
    padding: 40px 100px;
    background: linear-gradient(135deg, var(--light-bg), #f8f9fa);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr; /* 50:50 유지 */
  gap: 1.2rem;
  max-width: 1000px;
  margin: 0 auto;
  align-items: stretch;
}

.contact-map iframe {
    width: 100%;
    height: 260px;
    border: 0;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
}

.contact-info {
    padding: 2rem;
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow-md);
}

/* Override contact layout for equal heights */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 2rem;
    max-width: 1300px;
    margin: 0 auto;
    align-items: start;
}

.contact-map,
.contact-info {
    height: 100%;
}

.contact-map iframe {
    width: 100%;
    height: 100%;
    min-height: 280px;
    border: 0;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* .contact-info h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
} */

.contact-item {
    /* margin-bottom: 1.5rem;
    display: flex;
    gap: 2rem; */
    display: grid;
    grid-template-columns: 160px 1fr; /* 레이블 폭 조정 */
    column-gap: 1.25rem;             /* strong–span 간격 */
    margin-bottom: 1.25rem;
    align-items: start;
}

.contact-item strong {
    color: var(--secondary-color);
    min-width: 80px;
}

/* ===== 푸터 ===== */
.footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 2rem;
    text-align: center;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer p {
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--secondary-color);
}

/* ===== 페이지 헤더 (다른 페이지용) ===== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    margin-top: 60px;
    padding: 60px 20px;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* ===== 연구 페이지 ===== */
.research-section {
    padding: 60px 20px;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.research-card {
    background-color: var(--white);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    border-left: 4px solid var(--secondary-color);
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.research-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.research-card p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.research-card ul {
    padding-left: 1.5rem;
}

.research-card li {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

/* ===== 프로젝트 섹션 ===== */
.projects-section {
    padding: 60px 20px;
    background-color: var(--light-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background-color: var(--white);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    border-top: 4px solid var(--accent-color);
}

/* 구간별 카드 포인트 색상 */
.projects-section .project-card {
    border-top-color: var(--ongoing-color);
}

.research-section .project-card {
    border-top-color: var(--completed-color);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.project-meta {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.project-tags span {
    background-color: var(--light-bg);
    color: var(--secondary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* ===== 멤버 섹션 ===== */
.members-section {
    padding: 60px 20px;
}

.members-subsection {
    margin-bottom: 4rem;
}

.subsection-title {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid var(--secondary-color);
}

.members-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2.3rem;
    justify-content: flex-start;
    align-items: stretch;
}

.member-card {
    background: none;
    border-radius: 10px;
    overflow: visible;
    box-shadow: none;
    transition: all var(--transition);
    padding: 0;
    flex: 1 1 calc(33.333% - 0.8rem);
    max-width: 360px;
    min-width: 280px;
    margin: 0;
    display: flex;
    flex-direction: column;
}

.member-card:hover {
    transform: translateY(-5px);
    box-shadow: none;
}

.member-avatar {
    width: 100%;
    height: 340px;
    background: none;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 3rem;
    overflow: hidden;
    padding: 0;
}

.member-photo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
}

.member-info {
    padding: 1rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    margin-top: 0.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.career-list{
    list-style: none;
    padding-left: 0;
    margin: 0;
}

/* ===== 교수 단일 카드 레이아웃 ===== */
.professor-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    margin-top: 1rem;
}

.professor-photo-box,
.professor-info-box {
    border: none;
    border-radius: 12px;
    background: #fff;
    padding: 20px;
    box-shadow: var(--shadow-md);
}

.professor-photo-box {
    display: flex;
    align-items: center;
    justify-content: center;
}

.professor-photo {
    width: 100%;
    height: 100%;
    max-height: 480px;
    object-fit: contain;
    object-position: center;
}

.professor-info-box h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.professor-info-box .position {
    margin-bottom: 1rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.professor-desc {
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.7;
}

.professor-meta {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem 0;
}

.professor-meta li {
    margin-bottom: 0.8rem;
    color: var(--text-color);
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.professor-meta strong {
    display: inline-block;
    min-width: 80px;
    color: var(--primary-color);
}

.meta-lines {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* .professor-contact {
    list-style: none;
    padding: 0;
    margin: 0.8rem 0 1rem 0;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.professor-contact strong {
    display: inline-block;
    min-width: 80px;
    color: var(--primary-color);
} */

@media (max-width: 768px) {
    .professor-layout {
        grid-template-columns: 1fr;
    }
}

.member-info {
    padding: 1rem;
}

.member-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.member-info .position {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.member-info p {
    color: var(--text-color);
    font-size: 0.9rem;
    line-height: 1.6;
}

.member-stats {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--light-bg);
    font-size: 0.85rem;
}

.member-stats div {
    color: var(--secondary-color);
}

/* ===== 논문 페이지 ===== */
.publications-section {
    padding: 60px 20px;
}

.filter-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid var(--secondary-color);
    background-color: transparent;
    color: var(--secondary-color);
    border-radius: 25px;
    cursor: pointer;
    transition: all var(--transition);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--secondary-color);
    color: var(--white);
}

.publication-year {
    margin-bottom: 3rem;
}

.year-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 4px solid var(--secondary-color);
}

.publication-item {
    background-color: var(--white);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
    transition: all var(--transition);
}

.publication-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.publication-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.publication-item .authors {
    color: var(--text-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-style: italic;
}

.publication-item .details {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.pub-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.pub-tags span {
    background-color: var(--light-bg);
    color: var(--secondary-color);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
}

/* ===== 뉴스 페이지 ===== */
.news-section {
    padding: 60px 20px;
}

.news-month {
    margin-bottom: 3rem;
}

.month-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 4px solid var(--secondary-color);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.news-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    display: flex;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.news-date {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 60px;
}

.news-date .day {
    font-size: 1.8rem;
    font-weight: bold;
}

.news-date .month {
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.news-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-content h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.news-content .category {
    display: inline-block;
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
    width: fit-content;
}

.news-content .category.notice {
    background-color: var(--accent-color);
}

.news-content .category.event {
    background-color: #f39c12;
}

.news-content p {
    color: var(--text-color);
    font-size: 0.9rem;
    flex: 1;
}

/* ===== 애니메이션 ===== */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}


/* ===== 태블릿 반응형 (768px 이하) ===== */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content p {
        font-size: 1.2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .achievements-grid {
        grid-template-columns: 1fr;
    }

    .culture-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer .container {
        flex-direction: column;
        gap: 1rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .research-grid {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .members-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        background-color: transparent;
        border: none;
        box-shadow: none;
        padding: 0;
        margin-top: 0;
    }

    .dropdown-menu a {
        padding: 0.5rem 1.5rem;
        font-size: 0.9rem;
    }

    .video-wrapper {
        padding-bottom: 56.25%;
    }

    .video-description {
        font-size: 1rem;
    }
}

/* ===== 모바일 반응형 (480px 이하) ===== */
@media (max-width: 480px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        gap: 0;
        box-shadow: var(--shadow-md);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        border-bottom: 1px solid var(--light-bg);
    }

    .nav-menu a {
        display: block;
        padding: 1rem 1.5rem;
    }

    .hero {
        padding: 60px 20px;
        min-height: 320px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .about-title {
        font-size: 1.8rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .culture-grid {
        grid-template-columns: 1fr;
    }

    .members-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .filter-buttons {
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 8px 15px;
        font-size: 0.85rem;
    }

    .contact-wrapper {
        gap: 1.5rem;
    }

    .social-links {
        justify-content: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .footer .container {
        flex-direction: column;
        gap: 1rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .page-header p {
        font-size: 1rem;
    }

    .subsection-title {
        font-size: 1.4rem;
    }

    .video-wrapper {
        padding-bottom: 56.25%;
    }
}

/* ===== ���� ���� (�Խ���) ===== */
.news-board-section {
    padding: 60px 20px;
}

.board-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    gap: 1rem;
}

.board-title {
    font-size: 1.6rem;
    color: var(--primary-color);
    font-weight: 700;
}

.board-actions {
    display: flex;
    gap: 0.5rem;
}

.board-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--secondary-color);
    background: var(--white);
    color: var(--secondary-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition);
}

.board-btn:hover {
    background: var(--secondary-color);
    color: var(--white);
}

.news-board {
    width: 100%;
    border-collapse: collapse;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border-radius: 8px;
    background: var(--white);
}

.news-board th,
.news-board td {
    padding: 0.9rem 0.75rem;
    border-bottom: 1px solid var(--light-bg);
    text-align: center;
}

.news-board thead th {
    background: var(--light-bg);
    color: var(--primary-color);
    font-weight: 700;
}

.news-board tbody tr:hover {
    background: #f7fafc;
}

.news-board .text-left {
    text-align: left;
}

.col-no { width: 60px; }
.col-cat { width: 90px; }
.col-date { width: 120px; }

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge.news {
    background-color: rgba(67, 56, 202, 0.12);
    color: #4338ca;
}

.badge.notice {
    background-color: rgba(234, 88, 12, 0.12);
    color: #c2410c;
}

.badge.event {
    background-color: rgba(16, 185, 129, 0.12);
    color: #0f9b6c;
}

/* ===== ���� �Խ��� Ȯ�� ��Ÿ�� ===== */
.board-row {
    cursor: pointer;
}

.board-detail {
    display: none;
}

.board-detail.open {
    display: table-row;
}

.detail-box {
    background: #f7fafc;
    border-left: 4px solid var(--secondary-color);
    padding: 1rem;
    color: var(--text-color);
    line-height: 1.6;
    border-radius: 0 6px 6px 0;
}