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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
}

.loading-logo {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
    letter-spacing: 2px;
}

.loading-progress {
    width: 300px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 100%;
    background: var(--primary-color);
    width: 0;
    transition: width 0.3s ease;
}

.loading-percentage {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: transform 0.3s;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 2rem;
}

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

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

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

.nav a:hover::after {
    width: 100%;
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: 5px;
    margin-left: 30px;
}

.lang-btn {
    padding: 6px 12px;
    border: 1px solid #ddd;
    background: white;
    color: #666;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 4px;
    transition: all 0.3s;
}

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

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

/* Hero Slider Section */
.hero-slider {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    max-height: 900px;
    overflow: hidden;
    margin-top: 75px;
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 1;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transform: scale(1);
}

.slide.active .slide-bg {
    animation: zoomIn 8s ease-out forwards;
}

@keyframes zoomIn {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.1);
    }
}

/* Video Background */
.slide-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;
}

.slide[data-type="video"] .slide-bg {
    display: none;
}

.slide-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
    z-index: 1;
}

.slide-text {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 900px;
    padding: 3rem 4rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.slide-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    animation: slideInUp 0.8s ease-out;
}

.slide-description {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
    animation: slideInUp 0.8s ease-out 0.2s both;
}

.slide-cta {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: white;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: slideInUp 0.8s ease-out 0.4s both;
}

.slide-cta:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

/* Slider Buttons */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.3);
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.slider-btn:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: translateY(-50%) scale(1.1);
}

.slider-btn span {
    font-size: 2.5rem;
    color: white;
    font-weight: 300;
    line-height: 1;
}

.slider-btn.prev {
    left: 2rem;
}

.slider-btn.next {
    right: 2rem;
}

/* Slider Indicators */
.slider-indicators {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
    z-index: 10;
}

.indicator {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid white;
    cursor: pointer;
    transition: all 0.3s;
    padding: 0;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: scale(1.2);
}

.indicator.active {
    background: white;
    width: 40px;
    border-radius: 10px;
}

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

/* About Section */
.about {
    padding: 100px 0;
    background: var(--bg-white);
}

.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 5rem;
    align-items: center;
}

.about-content {
    padding-right: 2rem;
}

.about-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.about-features {
    display: flex;
    gap: 3rem;
}

.feature-item {
    text-align: center;
}

.feature-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.feature-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

.about-image {
    position: relative;
}

.about-visual {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.tech-circle {
    position: relative;
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.circle-item {
    position: absolute;
    background: white;
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    font-weight: 600;
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    font-size: 0.9rem;
    animation: rotate-reverse 20s linear infinite;
}

@keyframes rotate-reverse {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(-360deg);
    }
}

.circle-item:nth-child(1) {
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
}

.circle-item:nth-child(2) {
    right: -30px;
    top: 50%;
    transform: translateY(-50%);
}

.circle-item:nth-child(3) {
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

.circle-item:nth-child(4) {
    left: -30px;
    top: 50%;
    transform: translateY(-50%);
}

.about-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--border-color);
}

.about-card h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.about-card ul {
    list-style: none;
    padding: 0;
}

.about-card li {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.about-card li:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.about-card strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

.about-images {
    padding: 2rem 0;
}

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

.about-img-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
}

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

.about-img-item img {
    width: 100%;
    height: auto;
    display: block;
}

.img-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    transform: translateY(100%);
    transition: transform 0.3s;
}

.about-img-item:hover .img-label {
    transform: translateY(0);
}

.about-values {
    text-align: center;
}

.values-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.value-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    border: 2px solid var(--border-color);
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.value-image {
    width: 100%;
    height: 150px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.value-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.value-card h4 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.value-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    animation: fadeInUp 0.8s forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

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

/* Partners Section */
.partners {
    padding: 80px 0;
    background: var(--bg-white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.partner-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s;
    border: 2px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 150px;
}

.partner-item img {
    max-width: 100%;
    max-height: 80px;
    object-fit: contain;
    margin-bottom: 0.5rem;
}

.partner-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.5rem;
}

.partner-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.partner-placeholder {
    background: var(--bg-light);
}

.partner-placeholder span {
    font-weight: 600;
    color: var(--text-secondary);
}

/* Patents Section */
.patents {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.patent-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
    border: 2px solid var(--border-color);
    text-align: center;
}

.patent-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.patent-icon {
    width: 150px;
    height: 150px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.patent-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.patent-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.patent-number {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.patent-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.patent-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s;
}

.patent-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Collaborative Sites Section */
.collaborative-sites {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.collab-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    border: 2px solid transparent;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.collab-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.collab-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

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

.collab-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    filter: grayscale(0);
    transition: all 0.3s;
}

.collab-card:hover .collab-icon {
    transform: scale(1.2) rotate(5deg);
}

.collab-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.collab-domain {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    font-family: monospace;
}

.collab-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.collab-arrow {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    color: var(--primary-color);
    opacity: 0;
    transition: all 0.3s;
}

.collab-card:hover .collab-arrow {
    opacity: 1;
    transform: translateX(5px);
}

/* Responsive for Collaborative Sites */
@media (max-width: 768px) {
    .collab-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 1.5rem;
    }

    .collab-card {
        padding: 1.5rem;
    }

    .collab-icon {
        font-size: 2.5rem;
    }

    .collab-card h3 {
        font-size: 1.1rem;
    }
}

/* Services Section */
.services {
    padding: 80px 0;
    background: var(--bg-white);
}

/* Projects Section */
.projects {
    padding: 80px 0;
    background: var(--bg-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
    text-decoration: none;
    color: inherit;
    display: block;
}

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

.project-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
    display: none;
}

.project-image img[src]:not([src=""]) {
    display: block;
}

.project-card:nth-child(2) .project-image {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.project-card:nth-child(3) .project-image {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.project-card:nth-child(4) .project-image {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.project-card:nth-child(5) .project-image {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.project-card:nth-child(6) .project-image {
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.view-more {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.project-info > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

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

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

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

.service-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    border: 2px solid transparent;
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.service-arrow {
    position: absolute;
    bottom: 1.5rem;
    right: 1.5rem;
    font-size: 1.5rem;
    color: var(--primary-color);
    opacity: 0;
    transition: all 0.3s;
}

.service-card:hover .service-arrow {
    opacity: 1;
    transform: translateX(5px);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

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

.service-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Contact Section */
.contact-section {
    padding: 100px 0;
    background: var(--bg-white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.contact-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 3rem;
}

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

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

.detail-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.detail-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.detail-item p {
    color: var(--text-secondary);
}

/* Contact Form */
.contact-form-wrapper {
    position: relative;
}

.contact-form {
    background: var(--bg-white);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

input,
select,
textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s;
    background: var(--bg-white);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    margin-top: 2rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.submit-button {
    width: 100%;
    padding: 1.125rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.submit-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.submit-button:active {
    transform: translateY(0);
}

.button-arrow {
    transition: transform 0.3s;
}

.submit-button:hover .button-arrow {
    transform: translateX(5px);
}

/* Form Success Message */
.form-success {
    display: none;
    text-align: center;
    padding: 4rem 2rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
}

.form-success.show {
    display: block;
    animation: fadeInScale 0.5s forwards;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--success-color);
    color: white;
    font-size: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.form-success h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.form-success p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0;
}

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

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.footer-info {
    text-align: right;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

/* Floating Action Buttons */
.floating-actions {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 999;
}

.fab {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s;
    text-decoration: none;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
    background: var(--primary-dark);
}

/* Responsive Design */
@media (max-width: 968px) {
    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-content {
        padding-right: 0;
    }

    .about-features {
        gap: 2rem;
    }

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

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

    .slide-description {
        font-size: 1.2rem;
    }

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

    .slider-btn {
        width: 50px;
        height: 50px;
    }

    .slider-btn span {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

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

    .hero-slider {
        height: 70vh;
        min-height: 500px;
        margin-top: 70px;
    }

    .slide-text {
        padding: 2rem 2.5rem;
    }

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

    .slide-description {
        font-size: 1.1rem;
    }

    .slide-cta {
        padding: 1rem 2rem;
        font-size: 1rem;
    }

    .slider-btn {
        width: 40px;
        height: 40px;
    }

    .slider-btn.prev {
        left: 1rem;
    }

    .slider-btn.next {
        right: 1rem;
    }

    .slider-btn span {
        font-size: 1.5rem;
    }

    .slider-indicators {
        bottom: 2rem;
    }

    .indicator {
        width: 12px;
        height: 12px;
    }

    .indicator.active {
        width: 30px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 2rem 1.5rem;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .footer-info {
        text-align: center;
    }

    .floating-actions {
        bottom: 1rem;
        right: 1rem;
    }

    .fab {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

/* Board Preview Section */
.board-preview {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.view-more-btn {
    padding: 10px 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s;
}

.view-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.board-preview-list {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    border: 2px solid #667eea;
}

.board-preview-item {
    display: flex;
    gap: 15px;
    align-items: center;
    padding: 20px 30px;
    border-bottom: 1px solid #e5e7eb;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 4px solid transparent;
    background: #f8f9fa;
}

.board-preview-item:nth-child(even) {
    background: #ffffff;
}

.board-preview-item:last-child {
    border-bottom: none;
}

.board-preview-item:hover {
    background: linear-gradient(90deg, #f0f4ff 0%, #ffffff 100%) !important;
    padding-left: 40px;
    border-left-color: #667eea;
}

.board-item-thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.board-item-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.board-item-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.board-item-category {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
}

.board-item-category.category-notice {
    background: #e3f2fd;
    color: #1976d2;
}

.board-item-category.category-update {
    background: #f3e5f5;
    color: #7b1fa2;
}

.board-item-category.category-event {
    background: #fff3e0;
    color: #f57c00;
}

.board-item-category.category-news {
    background: #e8f5e9;
    color: #388e3c;
}

.board-item-category.category-general {
    background: #f5f5f5;
    color: #616161;
}

.board-item-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1a1a1a;
    margin: 0;
}

.board-item-date {
    font-size: 0.85rem;
    color: #999;
    white-space: nowrap;
}

.board-item-arrow {
    font-size: 1.5rem;
    color: #667eea;
    transition: transform 0.3s;
    flex-shrink: 0;
}

.board-preview-item:hover .board-item-arrow {
    transform: translateX(5px);
}

.board-preview-item {
    cursor: pointer;
}

.board-item-preview {
    font-size: 0.9rem;
    color: #666;
    margin: 5px 0;
    line-height: 1.5;
}

.board-item-meta {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: #999;
}

.board-item-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.no-posts {
    text-align: center;
    padding: 60px 20px;
    color: #999;
    font-size: 1.1rem;
}

/* Board Pagination */
.board-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 30px 20px;
    background: white;
}

.page-btn {
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid #e5e7eb;
    background: white;
    color: #666;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s;
}

.page-btn:hover:not(.active) {
    border-color: #667eea;
    color: #667eea;
    background: #f0f4ff;
}

.page-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: #667eea;
    cursor: default;
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Post Detail Modal */
.post-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.post-modal.show {
    display: flex;
}

.post-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
}

.post-modal-content {
    position: relative;
    background: white;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 10001;
}

.post-modal-close {
    position: sticky;
    top: 10px;
    right: 10px;
    float: right;
    background: rgba(0, 0, 0, 0.1);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s;
    z-index: 10002;
}

.post-modal-close:hover {
    background: rgba(0, 0, 0, 0.2);
    transform: rotate(90deg);
}

.post-detail-header {
    padding: 40px 40px 20px;
    border-bottom: 2px solid #f0f0f0;
}

.post-category {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.post-title {
    font-size: 2rem;
    font-weight: 700;
    color: #1a1a1a;
    margin: 15px 0;
    line-height: 1.4;
}

.post-meta {
    display: flex;
    gap: 20px;
    color: #666;
    font-size: 0.95rem;
    margin-top: 15px;
}

.post-share-section {
    padding: 20px 40px;
    background: #f8f9fa;
    border-bottom: 2px solid #f0f0f0;
}

.share-url-container {
    display: flex;
    gap: 10px;
    align-items: center;
}

.share-url-container input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 0.95rem;
    background: white;
    color: #333;
    font-family: monospace;
}

.share-url-container input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.copy-url-btn {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.copy-url-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.copy-url-btn:active {
    transform: translateY(0);
}

.post-images {
    padding: 30px 40px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.post-images img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: transform 0.3s;
}

.post-images img:hover {
    transform: scale(1.05);
}

/* Single image - full width */
.post-images:has(img:only-child) {
    grid-template-columns: 1fr;
}

.post-images:has(img:only-child) img {
    height: auto;
    max-height: 600px;
}

.post-videos {
    padding: 30px 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.post-videos iframe {
    width: 100%;
    border-radius: 10px;
}

.post-content {
    padding: 30px 40px 40px;
    font-size: 1.05rem;
    line-height: 1.8;
    color: #333;
    white-space: pre-wrap;
}

.board-item-category.category-tech {
    background: #e3f2fd;
    color: #1976d2;
}

.board-item-category.category-portfolio {
    background: #f3e5f5;
    color: #7b1fa2;
}

@media (max-width: 768px) {
    .post-modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .post-detail-header,
    .post-images,
    .post-videos,
    .post-content {
        padding: 20px;
    }

    .post-title {
        font-size: 1.5rem;
    }

    .post-meta {
        flex-direction: column;
        gap: 8px;
    }

    .post-images {
        grid-template-columns: 1fr;
    }

    .post-images img {
        height: 200px;
    }
}

/* Responsive for Board Preview */
@media (max-width: 768px) {
    .board-preview {
        padding: 60px 0;
    }

    .section-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .view-more-btn {
        width: 100%;
        text-align: center;
    }

    .board-preview-item {
        padding: 15px 20px;
        flex-wrap: wrap;
    }

    .board-preview-item:hover {
        padding-left: 25px;
    }

    .board-item-thumbnail {
        width: 60px;
        height: 60px;
    }

    .board-item-content {
        flex: 1;
        min-width: 0;
    }

    .board-item-header {
        flex-wrap: wrap;
        gap: 8px;
    }

    .board-item-title {
        font-size: 1rem;
    }

    .board-item-date {
        font-size: 0.8rem;
    }

    .board-item-title {
        font-size: 1rem;
    }

    .board-item-date {
        font-size: 0.85rem;
    }
}