/* 기본 리셋 및 설정 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #003d82;
    --primary-dark: #002855;
    --primary-light: #0052a8;
    --secondary-color: #1e5a9e;
    --accent-color: #0066cc;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #6c757d;
    --dark-gray: #343a40;
    --text-dark: #212529;
    --border-color: #dee2e6;
    --shadow: 0 2px 10px rgba(0, 61, 130, 0.1);
    --shadow-hover: 0 5px 20px rgba(0, 61, 130, 0.2);
}

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

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

/* Header & Navigation */
#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.navbar {
    padding: 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-image {
    height: 45px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo h1 {
    font-size: 28px;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 0;
}

.logo-subtitle {
    font-size: 16px;
    color: var(--primary-color);
    font-weight: 700;
    margin: 0;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
    padding: 5px 0;
}

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

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

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 70px;
    overflow: hidden;
    background: #000000;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    z-index: 0;
    filter: brightness(0.7);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.hero-overlay::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 102, 204, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(30, 90, 158, 0.08) 0%, transparent 40%);
    animation: subtleGlow 15s ease-in-out infinite;
}

.hero-overlay::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: 
        linear-gradient(90deg, transparent 0%, rgba(0, 61, 130, 0.1) 50%, transparent 100%);
    background-size: 200% 100%;
    animation: horizontalShimmer 12s ease-in-out infinite;
}

/* Animated Shapes */
.hero-content {
    position: relative;
    text-align: center;
    color: var(--white);
    z-index: 10;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    margin-bottom: 20px;
    text-shadow: 2px 2px 20px rgba(0, 0, 0, 0.8);
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    font-weight: 300;
    line-height: 1.8;
    text-shadow: 1px 1px 10px rgba(0, 0, 0, 0.8);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.btn-outline {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Section Styles */
section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 42px;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray);
    font-weight: 300;
}

/* About Section */
.about-section {
    background-color: var(--white);
}

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

.about-text h3 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: 700;
}

.about-text p {
    margin-bottom: 15px;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-dark);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 25px;
    background-color: var(--light-gray);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    background-color: var(--primary-color);
    color: var(--white);
}

.stat-item:hover .stat-number,
.stat-item:hover .stat-label {
    color: var(--white);
}

.stat-number {
    font-size: 36px;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray);
    font-weight: 500;
}

.about-image-placeholder {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    height: 400px;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-hover);
}

.about-image-placeholder i {
    font-size: 80px;
    margin-bottom: 20px;
}

.about-image-placeholder p {
    font-size: 24px;
    font-weight: 600;
}

/* Business Section */
.business-section {
    background-color: var(--light-gray);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.business-card {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.business-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.business-icon i {
    font-size: 36px;
    color: var(--white);
}

.business-card h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: 700;
}

.business-list {
    list-style: none;
}

.business-list li {
    padding: 10px 0;
    font-size: 15px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
}

.business-list li i {
    color: var(--primary-color);
    margin-right: 10px;
    font-size: 14px;
}

/* History Section */
.history-section {
    background-color: var(--white);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    margin-bottom: 30px;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-date {
    flex: 0 0 100px;
    text-align: center;
    padding: 8px 15px;
    background-color: var(--primary-color);
    color: var(--white);
    font-weight: 700;
    font-size: 14px;
    border-radius: 20px;
    margin: 0 25px;
    position: relative;
    z-index: 2;
    height: fit-content;
}

.timeline-item:nth-child(odd) .timeline-date {
    text-align: center;
}

.timeline-content {
    flex: 1;
    background-color: var(--light-gray);
    padding: 20px 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.timeline-content h3 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 8px;
    font-weight: 700;
}

.timeline-content p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.5;
}

/* Certifications Section */
.certifications-section {
    background-color: var(--light-gray);
}

.cert-intro {
    text-align: center;
    margin-bottom: 50px;
}

.cert-intro p {
    font-size: 18px;
    color: var(--text-dark);
}

.cert-intro strong {
    color: var(--primary-color);
    font-size: 22px;
    font-weight: 700;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.cert-item {
    background-color: var(--white);
    padding: 30px 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
    text-decoration: none;
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 280px;
}

.cert-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.cert-pdf-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #dc3545, #c82333);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.cert-pdf-icon i {
    font-size: 50px;
    color: var(--white);
}

.cert-item h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.cert-issuer {
    font-size: 15px;
    color: var(--gray);
    margin-bottom: 8px;
}

.cert-date {
    font-size: 13px;
    color: var(--dark-gray);
    font-weight: 500;
}

.cert-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}
}

.cert-image:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
}

/* Contact Section */
.contact-section {
    background-color: var(--white);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 25px;
    background-color: var(--light-gray);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 24px;
    color: var(--white);
}

.contact-details h3 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.contact-details p {
    font-size: 15px;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.contact-details a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.contact-details a:hover {
    text-decoration: underline;
}

.text-muted {
    color: var(--gray) !important;
    font-size: 14px !important;
}

.map-container {
    position: relative;
    height: 100%;
    min-height: 400px;
}

.map-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-hover);
}

.map-placeholder i {
    font-size: 60px;
    margin-bottom: 20px;
}

.map-placeholder p {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
}

/* Footer */
.footer {
    background-color: var(--primary-dark);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-info h3 {
    font-size: 28px;
    font-weight: 900;
    margin-bottom: 5px;
}

.footer-info p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-description {
    margin-top: 15px;
    font-size: 16px !important;
    color: rgba(255, 255, 255, 0.9) !important;
}

.footer-details p {
    margin-bottom: 10px;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

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

@keyframes subtleGlow {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes horizontalShimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Certificate Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.95);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
    animation: zoomIn 0.3s ease;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: absolute;
    top: 30px;
    right: 50px;
    color: #fff;
    font-size: 50px;
    font-weight: 300;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10000;
}

.modal-close:hover,
.modal-close:focus {
    color: var(--primary-color);
    transform: scale(1.2);
}

.modal-caption {
    text-align: center;
    color: #fff;
    padding: 20px;
    font-size: 16px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes zoomIn {
    from {
        transform: scale(0.7);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.cert-item {
    cursor: pointer;
}

.cert-item:hover .cert-image {
    transform: scale(1.08);
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-video {
        object-position: center center;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
        gap: 20px;
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 42px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

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

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

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

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

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

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 70px;
        margin-bottom: 25px;
    }

    .timeline-date {
        position: absolute;
        left: 0;
        margin: 0;
        font-size: 12px;
        padding: 6px 10px;
    }

    .timeline-content {
        padding: 15px 20px;
    }

    .timeline-content h3 {
        font-size: 16px;
    }

    .timeline-content p {
        font-size: 13px;
    }
}

@media (max-width: 768px) {
    .hero-section {
        min-height: 100vh;
        height: auto;
    }

    .hero-video {
        width: 100%;
        height: 100%;
        min-width: auto;
        min-height: auto;
        object-fit: cover;
        object-position: center center;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .section-title {
        font-size: 32px;
    }

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

    .stat-number {
        font-size: 28px;
    }

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

    .modal-close {
        top: 20px;
        right: 20px;
        font-size: 40px;
    }

    .modal-content {
        max-width: 95%;
        max-height: 85vh;
    }

    .logo-image {
        height: 35px;
    }

    .logo-subtitle {
        font-size: 13px;
    }
}

/* 작은 모바일 화면 최적화 */
@media (max-width: 480px) {
    .hero-section {
        min-height: 100vh;
    }

    .hero-video {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center center;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 14px;
        line-height: 1.6;
    }

    .btn {
        padding: 12px 30px;
        font-size: 14px;
    }
}