/* ===================================
   Global Styles & Variables
   =================================== */
:root {
    /* Color Palette - 연세대학교 공식 브랜드 색상 */
    --primary-color: #003876;      /* Yonsei Blue (공식) */
    --primary-light: #0059A3;      /* 밝은 연세 블루 */
    --primary-dark: #001F44;       /* 어두운 연세 블루 */
    --secondary-color: #004C97;    /* 보조 블루 */
    --secondary-light: #2E7AB5;    /* 밝은 보조 블루 */
    --accent-color: #0066CC;       /* 액센트 블루 */
    --accent-orange: #e67e22;      /* 오렌지 액센트 */
    
    /* Neutral Colors - Yonsei Dark Gray 적용 */
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --gray: #e5e5e5;
    --medium-gray: #8B8C8E;        /* 중간 그레이 */
    --dark-gray: #58595B;          /* Yonsei Dark Gray (공식) */
    --text-color: #333333;         /* 더 진한 텍스트 */
    --text-secondary: #58595B;     /* Yonsei Dark Gray for secondary text */
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Typography */
    --font-family: 'Noto Sans KR', 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-family-en: 'Montserrat', 'Noto Sans KR', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--text-color); /* #333333 */
    background-color: var(--white);
    overflow-x: hidden;
    font-weight: 400;
    letter-spacing: -0.3px; /* 한글 최적화 */
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family);
    font-weight: 700;
    letter-spacing: -0.5px; /* 제목 최적화 */
    word-break: keep-all; /* 한글 단어 단위 줄바꿈 */
}

/* 영문 숫자에 Montserrat 적용 */
.stat-number,
.course-code,
.nav-brand,
.btn {
    font-family: var(--font-family-en);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Navigation Bar
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav-brand i {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.nav-logo {
    height: 54px; /* 45px * 1.2 = 54px (20% 증가) */
    width: auto;
    margin-right: 0.5rem;
}

.nav-menu {
    display: flex;
    gap: 0;
    align-items: center;
}

.nav-link {
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    color: #333333;
    transition: all var(--transition-fast);
    position: relative;
    letter-spacing: -0.5px;
    font-size: 1rem;
    font-family: 'Noto Sans KR', sans-serif;
    border-right: 1px solid #e5e5e5;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    font-weight: 700;
}

.nav-link::after {
    display: none;
}

.nav-menu li:last-child .nav-link {
    border-right: none;
    color: var(--primary-color);
    font-weight: 600;
    padding-left: 2rem;
}

.nav-menu li:last-child .nav-link i {
    margin-right: 0.3rem;
    font-size: 0.9rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: all var(--transition-normal);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-color) 50%, var(--primary-color) 100%);
    color: var(--white);
    padding-top: 70px;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 204, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 89, 163, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 900; /* 더 굵게 */
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: -1px; /* 큰 제목 최적화 */
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400; /* 적절한 두께 */
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    letter-spacing: -0.3px;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 150px;
    transition: transform var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-item i {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-color);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800; /* Montserrat 굵게 */
    margin-bottom: 0.25rem;
    font-family: var(--font-family-en);
    letter-spacing: -0.5px;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
    font-weight: 500;
    letter-spacing: -0.2px;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    z-index: 2;
}

.scroll-indicator i {
    font-size: 2rem;
    color: var(--white);
    opacity: 0.7;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 700; /* 더 굵게 */
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    font-family: var(--font-family-en);
    letter-spacing: 0.5px; /* 영문 간격 */
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(0, 102, 204, 0.4);
}

.btn-primary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 204, 0.5);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* ===================================
   Section Styles
   =================================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 900; /* 더 굵게 - 연세 스타일 */
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
    letter-spacing: -1px; /* 큰 제목 최적화 */
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.section-subtitle a:hover {
    color: var(--accent-color) !important;
}

.section-header p {
    font-size: 1.15rem;
    color: var(--text-secondary); /* Yonsei Dark Gray */
    max-width: 700px;
    margin: var(--spacing-md) auto 0;
    font-weight: 400;
    letter-spacing: -0.3px;
    line-height: 1.7;
}

/* ===================================
   Programs Section
   =================================== */
.programs {
    background-color: var(--light-gray);
}

.program-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.program-card {
    background-color: var(--white);
    border-radius: var(--radius-md);
    padding: 0.9rem; /* 40% 쵙5소 (1.5rem → 0.9rem) */
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.program-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.program-icon {
    width: 38px; /* 40% 쵙5소 */
    height: 38px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.6rem;
}

.program-icon i {
    font-size: 1.2rem; /* 40% 쵙5소 */
    color: var(--white);
}

.program-card h3 {
    font-size: 0.95rem; /* 40% 쵙5소 */
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.4rem;
}

.program-card > p {
    color: var(--text-secondary); /* Yonsei Dark Gray */
    margin-bottom: 0.6rem;
    line-height: 1.4;
    font-size: 0.8rem;
}

.program-features {
    list-style: none;
    display: none; /* Hide features to reduce card size */
}

.program-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0;
    color: var(--text-color);
    font-size: 0.85rem;
}

.program-features li i {
    color: var(--accent-color);
    font-size: 0.85rem;
}

/* ===================================
   Departments Section
   =================================== */
.departments {
    background-color: var(--white);
}

.department-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.department-card {
    background: linear-gradient(to bottom, #ffffff 0%, #f8fbff 100%); /* 연세 블루 그라데이션 배경 */
    border-radius: var(--radius-lg);
    padding: 0.9rem;
    box-shadow: 0 2px 8px rgba(0, 56, 118, 0.08); /* 연세 블루 그림자 */
    transition: all var(--transition-normal);
    border: 2px solid rgba(0, 56, 118, 0.1); /* 연세 블루 테두리 */
    position: relative;
    overflow: hidden;
}

.department-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, #003876 0%, #0059A3 50%, #0066CC 100%); /* 연세 블루 그라데이션 */
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.department-card:hover::before {
    transform: scaleX(1);
}

.department-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(0, 56, 118, 0.18); /* 연세 블루 호버 그림자 */
    border-color: rgba(0, 56, 118, 0.3);
    background: linear-gradient(to bottom, #ffffff 0%, #f0f7ff 100%);
}

.dept-header {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.dept-header i {
    font-size: 1.5rem;
    color: #0066CC; /* 연세 액센트 블룠 */
    margin-bottom: 0.35rem;
    filter: drop-shadow(0 2px 4px rgba(0, 102, 204, 0.2));
}

.dept-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #003876; /* 연세 블루 */
    margin-bottom: 0.25rem;
    letter-spacing: -0.3px;
}

.dept-college {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, #e6f2ff 0%, #cce5ff 100%); /* 연세 블루 그라데이션 배경 */
    color: #003876; /* 연세 블루 */
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    border: 1px solid rgba(0, 56, 118, 0.15);
    letter-spacing: -0.2px;
}

.dept-description {
    color: var(--text-secondary); /* Yonsei Dark Gray */
    line-height: 1.5;
    margin-bottom: 0.6rem;
    text-align: justify;
    font-size: 0.8rem;
}

.dept-highlights {
    display: flex;
    gap: 0.4rem;
    margin-bottom: 0.6rem;
    flex-wrap: wrap;
    justify-content: center;
}

.highlight-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.4rem 0.5rem;
    background: linear-gradient(135deg, #f0f7ff 0%, #e6f2ff 100%); /* 연세 블루 그라데이션 */
    border-radius: 8px;
    flex: 1;
    min-width: 60px;
    text-align: center;
    border: 1px solid rgba(0, 102, 204, 0.1);
    transition: all var(--transition-fast);
}

.highlight-item:hover {
    background: linear-gradient(135deg, #e6f2ff 0%, #cce5ff 100%);
    transform: translateY(-2px);
    border-color: rgba(0, 102, 204, 0.2);
}

.highlight-item i {
    font-size: 0.95rem;
    color: #0066CC; /* 연세 액센트 블룠 */
}

.highlight-item span {
    font-size: 0.65rem;
    color: #003876; /* 연세 블룠 */
    font-weight: 600;
    letter-spacing: -0.2px;
}

.department-card .btn {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.6rem 1rem;
    font-size: 0.8rem;
    background: linear-gradient(135deg, #003876 0%, #0059A3 100%); /* 연세 블루 그라데이션 */
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 56, 118, 0.2);
}

.department-card .btn:hover {
    background: linear-gradient(135deg, #0059A3 0%, #0066CC 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 56, 118, 0.3);
}

/* ===================================
   Courses Section
   =================================== */
.courses {
    background: linear-gradient(180deg, var(--light-gray) 0%, var(--white) 100%);
}

.course-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--white);
    color: var(--text-color);
    border: 2px solid var(--gray);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.course-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.course-item {
    display: flex;
    gap: 0.75rem; /* 50% 쵙5소 */
    background-color: var(--white);
    border-radius: var(--radius-md);
    padding: 0.75rem; /* 50% 쵙5소 */
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border-left: 3px solid var(--accent-color); /* 쵙5소 */
}

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

.course-code {
    flex-shrink: 0;
    width: 91px; /* 30% 증가 (70px * 1.3 = 91px) */
    height: 70px; /* 50% 쵙5소 */
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem; /* 분야명 표시를 위해 증가 */
    text-align: center;
    padding: 0.35rem;
}

.course-info {
    flex: 1;
}

.course-info h4 {
    font-size: 1rem; /* 50% 쵙5소 */
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.35rem;
}

.course-desc {
    color: var(--text-secondary); /* Yonsei Dark Gray */
    line-height: 1.5;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.course-meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    padding: 0.2rem 0.6rem; /* 쵙5소 */
    background-color: var(--light-gray);
    color: var(--text-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem; /* 쵙5소 */
    font-weight: 500;
}

.tag-required {
    background-color: var(--accent-orange);
    color: var(--white);
}

/* ===================================
   About Section
   =================================== */
.about {
    background-color: var(--light-gray);
    padding: var(--spacing-xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.about-intro {
    font-size: 1.1rem;
    color: var(--text-secondary); /* Yonsei Dark Gray */
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.feature-item i {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
}

.feature-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.feature-item p {
    color: var(--text-secondary); /* Yonsei Dark Gray */
    font-size: 0.95rem;
}

.about-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.image-placeholder i {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.image-placeholder p {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
    line-height: 1.6;
}

/* ===================================
   Social Innovation Section
   =================================== */
.social-innovation {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: var(--spacing-xl) 0;
}

.innovation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.innovation-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border-left: 5px solid var(--primary-color);
}

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

.innovation-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.innovation-icon i {
    font-size: 2rem;
    color: var(--white);
}

.innovation-card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.innovation-desc {
    color: var(--text-secondary); /* Yonsei Dark Gray */
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

.innovation-features {
    list-style: none;
    padding: 0;
    margin-bottom: var(--spacing-md);
}

.innovation-features li {
    padding: 0.6rem 0;
    color: var(--text-secondary); /* Yonsei Dark Gray */
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    line-height: 1.6;
}

.innovation-features li i {
    color: var(--accent-color);
    font-size: 1.1rem;
    margin-top: 0.2rem;
}

.innovation-programs {
    background: var(--light-gray);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
}

.innovation-programs h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

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

.program-tag {
    background: var(--white);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    border: 2px solid var(--primary-color);
    transition: all var(--transition-fast);
}

.program-tag:hover {
    background: var(--primary-color);
    color: var(--white);
}

.innovation-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 1.2rem; /* 40% 축소 (2rem -> 1.2rem) */
    border-radius: var(--radius-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

.cta-content h3 {
    font-size: 1.05rem; /* 40% 축소 (1.75rem -> 1.05rem) */
    margin-bottom: 0.3rem; /* 40% 축소 (0.5rem -> 0.3rem) */
    color: var(--white);
}

.cta-content p {
    font-size: 0.66rem; /* 40% 축소 (1.1rem -> 0.66rem) */
    opacity: 0.95;
    color: var(--white);
}

.cta-buttons {
    display: flex;
    gap: 0.5rem; /* 약간 축소 */
}

.btn-primary,
.btn-secondary {
    padding: 0.6rem 1.2rem; /* 40% 축소 (1rem 2rem -> 0.6rem 1.2rem) */
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    display: inline-block;
    font-size: 0.85rem; /* 버튼 텍스트 크기 축소 */
}

.btn-primary {
    background: var(--white);
    color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--light-gray);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* ===================================
   Graduate Section
   =================================== */
.graduate {
    background: linear-gradient(180deg, var(--white) 0%, var(--light-gray) 100%);
    padding: var(--spacing-xl) 0;
}

.graduate-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 2x2 그리드 */
    gap: 1rem; /* 간격 축소 */
    margin-bottom: var(--spacing-md);
}

.graduate-card {
    background: var(--white);
    border-radius: var(--radius-md); /* 크기 쵙5소 */
    padding: 1rem; /* 50% 쵙5소 */
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border-top: 3px solid var(--accent-color); /* 테두리 쵙5소 */
}

.graduate-card p {
    font-size: 0.875rem; /* 쵙5소 */
    line-height: 1.4;
}

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

.graduate-icon {
    width: 40px; /* 50% 축소 */
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.5rem;
}

.graduate-icon i {
    font-size: 1.2rem; /* 50% 축소 */
    color: var(--white);
}

.graduate-card h3 {
    color: var(--primary-color);
    font-size: 1rem; /* 50% 축소 */
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.graduate-features {
    list-style: none;
    padding: 0;
}

.graduate-features li {
    padding: 0.3rem 0; /* 축소 */
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem; /* 축소 */
}

.graduate-features li i {
    color: var(--accent-color);
    font-size: 0.8rem; /* 축소 */
}

.graduate-programs {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    margin-top: var(--spacing-lg);
}

.programs-title {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
    border-bottom: 3px solid var(--accent-color);
    padding-bottom: var(--spacing-sm);
}

.programs-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 0.75rem; /* Reduced gap */
}

.program-item {
    padding: 0.75rem; /* Reduced by 50% from var(--spacing-md) */
    background: var(--light-gray);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color); /* Reduced from 4px */
    transition: all var(--transition-fast);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.program-item:hover {
    background: var(--gray);
    border-left-width: 4px; /* Reduced from 6px */
}

.program-item h4 {
    color: var(--primary-color);
    font-size: 0.9rem; /* Reduced by ~50% from 1.1rem */
    margin-bottom: 0.3rem; /* Reduced from 0.5rem */
}

.program-item p {
    color: var(--text-color);
    font-size: 0.8rem; /* Reduced from 0.95rem */
    line-height: 1.4; /* Reduced from 1.5 */
}

.program-item > i {
    font-size: 1.25rem; /* Reduced icon size for 50% reduction */
    color: var(--accent-color);
    margin-right: 0.5rem;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: #000000;
    color: #999999;
    padding: 2rem 0 1rem;
    font-size: 0.85rem;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 2rem 0;
    gap: 3rem;
}

.footer-left {
    flex-shrink: 0;
}

.footer-logo-main {
    height: 60px;
    width: auto;
}

.footer-center {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-info-row {
    display: flex;
    gap: 2rem;
    line-height: 1.8;
}

.footer-label {
    color: #666666;
    min-width: 100px;
    font-weight: 400;
}

.footer-value {
    color: #999999;
    font-weight: 300;
}

.footer-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 1rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999999;
    background-color: transparent;
    border: 1px solid #333333;
    border-radius: 50%;
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.footer-social a:hover {
    color: #ffffff;
    border-color: #666666;
    background-color: rgba(255, 255, 255, 0.05);
}

.footer-top-btn {
    width: 60px;
    height: 60px;
    background-color: #003876;
    color: #ffffff;
    border: none;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    letter-spacing: 0.5px;
}

.footer-top-btn:hover {
    background-color: #0059A3;
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid #333333;
    padding-top: 1.5rem;
    padding-bottom: 1rem;
}

.footer-copyright {
    color: #666666;
    font-size: 0.75rem;
    text-align: left;
    margin: 0;
    letter-spacing: 0.5px;
}

.footer-note {
    font-size: 0.85rem !important;
    opacity: 0.6;
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .image-placeholder {
        height: 300px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .department-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-md);
        padding: var(--spacing-md) 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        width: 100%;
        padding: 0.48rem; /* 40% 감소 (0.8rem -> 0.48rem) */
        margin-bottom: 0.3rem; /* 메뉴 항목 간 간격 추가 */
        border-right: none; /* 모바일에서 세로선 제거 */
    }
    
    .nav-link::after {
        display: none; /* 모바일에서 밑줄 숨김 */
    }
    
    .nav-menu li:last-child .nav-link {
        padding-left: 0.48rem; /* 모바일에서 동일한 패딩 */
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-stats {
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        min-width: 120px;
        padding: var(--spacing-sm);
    }
    
    .program-cards {
        grid-template-columns: 1fr;
    }
    
    .department-grid {
        grid-template-columns: 1fr;
    }
    
    .graduate-grid {
        grid-template-columns: 1fr; /* \ubaa8\ubc14\uc77c\uc5d0\uc11c\ub294 1\uc5f4\ub85c */
    }
    
    .course-item {
        flex-direction: column;
    }
    
    .innovation-grid {
        grid-template-columns: 1fr;
    }
    
    .innovation-cta {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
    
    .course-code {
        width: 100%;
        height: 60px;
    }
    
    .course-tabs {
        flex-direction: column;
    }
    
    .footer-main {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-right {
        align-items: flex-start;
    }
    
    .footer-info-row {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .tab-btn {
        width: 100%;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    section {
        padding: var(--spacing-lg) 0;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .stat-item {
        min-width: 100px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}