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

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

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

/* Header Styles */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo h1 {
    color: #2c5aa0;
    font-size: 1.8rem;
    font-weight: 700;
}

.logo a {
    text-decoration: none;
    color: inherit;
    display: block;
}

.logo-image {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    transition: transform 0.3s ease;
}

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

/* Navigation Styles */
.nav {
    display: flex;
    align-items: center;
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #2c5aa0;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: #2c5aa0;
}

/* Language Switch */
.language-switch {
    display: flex;
    gap: 0.5rem;
    margin-left: 2rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    text-decoration: none;
    color: #666;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: all 0.3s ease;
    font-size: 0.8rem;
}

.lang-btn:hover,
.lang-btn.active {
    background: #2c5aa0;
    color: #fff;
    border-color: #2c5aa0;
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    transition: 0.3s;
}

/* Main Content */
.main {
    margin-top: 80px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2c5aa0 0%, #1e3d72 100%);
    color: #fff;
    padding: 4rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.hero-date {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.8;
}

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

.btn {
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: #fff;
    color: #2c5aa0;
}

.btn-primary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: #fff;
    color: #2c5aa0;
}

/* Page Hero */
.page-hero {
    background: linear-gradient(135deg, #2c5aa0 0%, #1e3d72 100%);
    color: #fff;
    padding: 3rem 0;
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

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

/* Content Section */
.content {
    padding: 4rem 0;
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 4rem 0;
    background: #f8f9fa;
}

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

.feature-card {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: #2c5aa0;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: #666;
    margin-bottom: 1.5rem;
}

.feature-link {
    color: #2c5aa0;
    text-decoration: none;
    font-weight: 500;
}

.feature-link:hover {
    text-decoration: underline;
}

/* Solution Sections */
.solution-section {
    margin-bottom: 4rem;
    padding: 2rem 0;
    border-bottom: 1px solid #eee;
}

.solution-section:last-child {
    border-bottom: none;
}

.solution-header {
    text-align: center;
    margin-bottom: 3rem;
}

.solution-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.solution-header h2 {
    color: #2c5aa0;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.solution-subtitle {
    color: #666;
    font-size: 1.2rem;
}

.solution-content {
    max-width: 800px;
    margin: 0 auto;
}

.intro-text {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
}

.solution-features h3,
.key-capabilities h3,
.advanced-features h3 {
    color: #2c5aa0;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

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

.feature-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2c5aa0;
    font-weight: bold;
}

.capability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.capability-item {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #2c5aa0;
}

.capability-item h4 {
    color: #2c5aa0;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

.feature-item {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
}

.feature-item h4 {
    color: #2c5aa0;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.vision-text {
    background: #e8f2ff;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    margin-top: 2rem;
    font-style: italic;
    color: #2c5aa0;
    font-weight: 500;
}

.vision-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    justify-content: space-between;
}

.vision-text-content {
    flex: 1;
    text-align: left;
}

.vision-image {
    flex: 0 0 200px;
    max-width: 200px;
}

.tech-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

/* Bottom Image Section */
.bottom-image-section {
    background: #f8f9fa;
}

.bottom-image-wrapper {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.bottom-tech-image {
    width: 100%;
    height: auto;
    max-width: 800px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.bottom-tech-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

/* Event Details */
.event-details,
.event-significance,
.participation-details,
.vision,
.company-info {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.event-details h3,
.event-significance h3,
.participation-details h3,
.vision h3,
.company-info h3 {
    color: #2c5aa0;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.event-details ul {
    list-style: none;
    padding-left: 0;
}

.event-details li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.event-details li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #2c5aa0;
    font-weight: bold;
}

/* Footer */
.footer {
    background: #2c5aa0;
    color: #fff;
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-info h4 {
    margin-bottom: 0.5rem;
}

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

.footer-links a {
    color: #fff;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid #fff;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    background: #fff;
    color: #2c5aa0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: #fff;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: left 0.3s ease;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .language-switch {
        margin-left: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .page-title {
        font-size: 2rem;
    }

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

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

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .container {
        padding: 0 15px;
    }
    
    .logo-image {
        height: 40px;
        max-width: 150px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

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

    .solution-header h2 {
        font-size: 2rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

    .feature-card,
    .capability-item,
    .feature-item {
        padding: 1.5rem;
    }
    
    .logo-image {
        height: 35px;
        max-width: 120px;
    }
}

/* Solutions Overview */
.solutions-overview {
    text-align: center;
    margin-bottom: 3rem;
}

.solutions-overview h2 {
    color: #2c5aa0;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.solutions-overview p {
    font-size: 1.1rem;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
}

/* Solutions Grid */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.solution-card {
    background: #fff;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #f0f0f0;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.solution-card .solution-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.solution-card h3 {
    color: #2c5aa0;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.solution-card p {
    color: #666;
    margin-bottom: 1.5rem;
    text-align: center;
    line-height: 1.6;
}

.solution-features {
    list-style: none;
    padding: 0;
    margin-bottom: 2rem;
}

.solution-features li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #555;
    font-size: 0.95rem;
}

.solution-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2c5aa0;
    font-weight: bold;
    font-size: 1.1rem;
}

.solution-card .btn {
    width: 100%;
    text-align: center;
    margin-top: 1rem;
}

/* Vision Section */
.vision-section {
    background: #f8f9fa;
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    margin-top: 3rem;
    border-left: 4px solid #2c5aa0;
}

.vision-section h3 {
    color: #2c5aa0;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.vision-section p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto;
}

/* Responsive Design for Solutions */
@media (max-width: 768px) {
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .solution-card {
        padding: 2rem;
    }
    
    .solutions-overview h2 {
        font-size: 1.8rem;
    }
    
    .vision-section {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .solution-card {
        padding: 1.5rem;
    }
    
    .solution-card .solution-icon {
        font-size: 3rem;
    }
    
    .solution-card h3 {
        font-size: 1.3rem;
    }
}

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

/* Loading animation for better UX */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Intro Section Styles */
.intro-section {
    margin-bottom: 2rem;
}

.intro-content {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    margin-top: 1.5rem;
}

.intro-image {
    flex: 0 0 300px;
    max-width: 300px;
}

.intro-image .train-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.intro-image .train-image:hover {
    transform: scale(1.02);
}

.intro-text {
    flex: 1;
    /*padding-left: 1rem;*/
    text-align: left;
}

.intro-text p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    line-height: 1.7;
    color: #555;
    text-align: left;
}

.intro-text p span{
    font-weight: bold;
	color: black;
}

/* Responsive Design for Intro Section */
@media (max-width: 768px) {
    .intro-content {
        flex-direction: column;
        gap: 1.5rem;
        align-items: center; 
    }
    
    .intro-image {
        flex: none;
        width: 100%;
        text-align: center;
    }
    
    .intro-text {
        padding-left: 0;
    }
    
    .intro-text p {
        font-size: 1rem;
    }
}

/* CEO Signature Styles */
.ceo-signature {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
}

.signature-image {
    width: 80px;
    height: 40px;
    object-fit: contain;
    border-radius: 4px;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.signature-image:hover {
    opacity: 1;
}

/* Responsive Design for Signature */
@media (max-width: 768px) {
    .ceo-signature {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .signature-image {
        width: 60px;
        height: 30px;
    }
    
    .vision-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    
    .vision-text-content {
        text-align: center;
    }
    
    .vision-image {
        flex: none;
        max-width: 150px;
    }
    
    .bottom-image-section {
        padding: 2rem 0;
    }
    
    .bottom-tech-image {
        max-width: 100%;
    }
}