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

:root {
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --gradient-primary: linear-gradient(135deg, #1e3a8a, #3b82f6);
    --gradient-secondary: linear-gradient(135deg, #3b82f6, #60a5fa);
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 700;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link:hover::after {
    width: 100%;
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

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

.dropdown-menu li {
    border-bottom: 1px solid var(--border-color);
}

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

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 400;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.dropdown-menu a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
    padding-left: 25px;
}

.nav-link i {
    font-size: 0.7rem;
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.dropdown:hover .nav-link i {
    transform: rotate(180deg);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

/* Mobile dropdown menu styles */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

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

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: transparent;
        box-shadow: none;
        width: 100%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .dropdown-menu.active {
        max-height: 300px;
    }

    .dropdown-menu li {
        border-bottom: 1px solid var(--border-color);
    }

    .dropdown-menu a {
        padding: 10px 20px;
    }
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.8), rgba(59, 130, 246, 0.7));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    color: white;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    line-height: 1.2;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    font-weight: 300;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s;
    animation-fill-mode: both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 1s ease 0.4s;
    animation-fill-mode: both;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
    display: inline-block;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

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

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

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://picsum.photos/seed/modern-construction/1920/1080.jpg') center/cover;
    z-index: 0;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 2rem;
}

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

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-weight: 500;
}

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

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--text-light);
}

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

.business-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.business-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.business-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

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

.business-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Portfolio Section */
.portfolio {
    background: var(--bg-light);
}

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

.portfolio-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.portfolio-image {
    height: 200px;
    background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--text-light);
}

.portfolio-content {
    padding: 1.5rem;
}

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

.portfolio-content p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-text h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.contact-text p {
    color: var(--text-light);
    line-height: 1.6;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-full {
    width: 100%;
    padding: 15px;
    background: var(--gradient-primary);
    color: white;
}

.btn-full:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-logo h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.footer-logo p {
    opacity: 0.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.footer-column h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

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

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

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    opacity: 0.8;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

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

    .stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

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

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

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

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

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* Technology Section Styles */
.technology {
    background: var(--bg-light);
}

.technology-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

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

.tech-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.tech-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.8rem;
    color: white;
}

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

.tech-item p {
    color: var(--text-light);
    line-height: 1.6;
}

.tech-stats {
    background: var(--gradient-primary);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    color: white;
}

.tech-stat h4 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.tech-stat p {
    font-size: 1rem;
    opacity: 0.9;
}

.tech-stat:not(:last-child) {
    margin-bottom: 2rem;
}

/* Sustainability Section Styles */
.sustainability-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.sustainability-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.sustainability-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.sus-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

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

.sustainability-card p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    text-align: center;
}

.sustainability-card ul {
    list-style: none;
}

.sustainability-card li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 20px;
}

.sustainability-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* Recruit Section Styles */
.recruit {
    background: var(--bg-light);
}

.recruit-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.recruit-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.recruit-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.recruit-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

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

.recruit-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.recruit-details {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.recruit-details span {
    background: var(--bg-light);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.recruit-benefits h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.benefit-item {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.benefit-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.benefit-item i {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.benefit-item span {
    display: block;
    color: var(--text-dark);
    font-weight: 500;
}

/* News Section Styles */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.news-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.news-image {
    height: 200px;
    background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--text-light);
}

.news-content {
    padding: 1.5rem;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.news-date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.news-category {
    background: var(--gradient-secondary);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
}

.news-content h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.news-content p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.news-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s ease;
}

.news-link:hover {
    gap: 1rem;
}

/* Mobile Responsive Styles for New Sections */
@media (max-width: 768px) {
    .technology-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .tech-highlights {
        grid-template-columns: 1fr;
    }

    .tech-stats {
        padding: 1.5rem;
    }

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

    .recruit-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .recruit-details {
        flex-direction: column;
        gap: 0.5rem;
    }

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

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