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

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header Styles */
.header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

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

.nav-brand h1 {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #ffd700;
}

/* Dropdown Menu Styles */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-toggle::after {
    content: ' ▼';
    font-size: 0.8rem;
    margin-left: 0.5rem;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    list-style: none;
    padding: 0.5rem 0;
    margin: 0;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: 0.8rem 1.5rem;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
    border-bottom: 1px solid #f0f0f0;
}

.dropdown-menu a:hover {
    background: #f8f9fa;
    color: #1e3c72;
    padding-left: 2rem;
}

.dropdown-menu li:last-child a {
    border-bottom: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content h2 {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.highlight {
    color: #ffd700;
    font-weight: 700;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    display: inline-block;
}

.btn-primary {
    background: #ffd700;
    color: #1e3c72;
}

.btn-primary:hover {
    background: #ffed4e;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.4);
}

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

.btn-secondary:hover {
    background: white;
    color: #1e3c72;
    transform: translateY(-2px);
}

.hero-banners {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.banner-large {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.banner-large img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 1rem;
    max-width: 400px;
}

.banner-large h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #ffd700;
}

.banner-large p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Small Banners Section */
.small-banners {
    padding: 3rem 0;
    background: white;
}

.banner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.banner-small {
    background: white;
    color: #333;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.banner-small:hover {
    transform: translateY(-5px);
}

.banner-small img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
}

.banner-small:hover img {
    transform: scale(1.05);
}

.banner-small h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #1e3c72;
}

.banner-small p {
    font-size: 0.9rem;
    color: #666;
    margin: 0;
}

/* Main Content */
.main-content {
    padding: 4rem 0;
}

.intro-section {
    text-align: center;
    margin-bottom: 4rem;
}

.intro-section h2 {
    font-size: 2.5rem;
    color: #1e3c72;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.intro-section p {
    font-size: 1.2rem;
    color: #666;
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Criteria Section */
.criteria-section {
    margin-bottom: 4rem;
}

.criteria-section h2 {
    font-size: 2.2rem;
    color: #1e3c72;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}

.criteria-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.criterion {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.criterion h3 {
    color: #1e3c72;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.criterion p {
    color: #666;
    line-height: 1.7;
}

/* Trends Section */
.trends-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    margin: 4rem 0;
    border-radius: 20px;
}

.trends-section h2 {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}

.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.trend {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.trend h3 {
    color: #ffd700;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.trend p {
    line-height: 1.7;
    opacity: 0.9;
}

/* Verification Section */
.verification-section {
    margin-bottom: 4rem;
}

.verification-section h2 {
    font-size: 2.2rem;
    color: #1e3c72;
    text-align: center;
    margin-bottom: 2rem;
    font-weight: 700;
}

.verification-section p {
    font-size: 1.1rem;
    color: #666;
    text-align: center;
    margin-bottom: 3rem;
    line-height: 1.8;
}

.verification-checklist {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    max-width: 600px;
    margin: 0 auto;
}

.verification-checklist h3 {
    color: #1e3c72;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 600;
}

.verification-checklist ul {
    list-style: none;
}

.verification-checklist li {
    padding: 0.8rem 0;
    font-size: 1.1rem;
    color: #333;
    border-bottom: 1px solid #eee;
}

.verification-checklist li:last-child {
    border-bottom: none;
}

/* Recommendations Section */
.recommendations-section {
    margin-bottom: 4rem;
}

.recommendations-section h2 {
    font-size: 2.2rem;
    color: #1e3c72;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}

.recommendations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.recommendation-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    border-top: 4px solid #ffd700;
}

.recommendation-card:hover {
    transform: translateY(-5px);
}

.recommendation-card h3 {
    color: #1e3c72;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.recommendation-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.feature {
    background: #e3f2fd;
    color: #1e3c72;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* FAQ Section */
.faq-section {
    margin-bottom: 4rem;
}

.faq-section h2 {
    font-size: 2.2rem;
    color: #1e3c72;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    margin-bottom: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.faq-item h3 {
    background: #1e3c72;
    color: white;
    padding: 1.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
}

.faq-item p {
    padding: 1.5rem;
    color: #666;
    line-height: 1.7;
    margin: 0;
}

/* Footer */
.footer {
    background: #1e3c72;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #ffd700;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #ffd700;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 1rem;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.disclaimer {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        display: none;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.1);
        margin-top: 0.5rem;
    }
    
    .dropdown-menu a {
        color: white;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    }
    
    .dropdown-menu a:hover {
        background: rgba(255, 255, 255, 0.2);
        color: #ffd700;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .hero-content h2 {
        font-size: 1.4rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-banners {
        grid-template-columns: 1fr;
    }
    
    .banner-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .criteria-grid,
    .trends-grid,
    .recommendations-grid {
        grid-template-columns: 1fr;
    }
    
    .intro-section h2 {
        font-size: 2rem;
    }
    
    .criteria-section h2,
    .trends-section h2,
    .verification-section h2,
    .recommendations-section h2,
    .faq-section h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-content h2 {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .banner-grid {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 2rem 0;
    }
    
    .intro-section h2 {
        font-size: 1.6rem;
    }
    
    .criteria-section h2,
    .trends-section h2,
    .verification-section h2,
    .recommendations-section h2,
    .faq-section h2 {
        font-size: 1.5rem;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus Styles for Accessibility */
a:focus,
button:focus {
    outline: 2px solid #ffd700;
    outline-offset: 2px;
}

/* Related Resources */
.related-resources {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin-top: 2rem;
    border-left: 4px solid #1e3c72;
}

.related-resources h3 {
    color: #1e3c72;
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.related-resources ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.related-resources li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.related-resources li::before {
    content: '🔗';
    position: absolute;
    left: 0;
    top: 0;
}

.related-resources a {
    color: #1e3c72;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.related-resources a:hover {
    color: #ffd700;
    text-decoration: underline;
}

/* Card Images */
.card-image {
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.card-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

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

/* Card Links */
.card-links {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.external-link {
    display: inline-block;
    background: #1e3c72;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.external-link:hover {
    background: #ffd700;
    color: #1e3c72;
    transform: translateY(-2px);
}

/* Social Links */
.social-links {
    margin-top: 1rem;
}

.telegram-link {
    display: inline-block;
    background: #0088cc;
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.telegram-link:hover {
    background: #006699;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 136, 204, 0.3);
}

.telegram-link::before {
    content: '📱 ';
    margin-right: 0.5rem;
}

/* Trend Images */
.trend-image {
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.trend-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.trend-image:hover img {
    transform: scale(1.05);
}

/* Trend Links */
.trend-links {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
}

.trend-link {
    display: inline-block;
    background: #17a2b8;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.trend-link:hover {
    background: #138496;
    color: white;
    transform: translateY(-2px);
}

.trend-link::before {
    content: '📈 ';
    margin-right: 0.5rem;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .hero-buttons {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    h1, h2, h3 {
        page-break-after: avoid;
    }
}