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

:root {
    /* Corporate Color Palette */
    --primary-blue: #003366;
    --dark-black: #050A10;
    --mid-black: #2B2E33;
    --light-black: #6A7078;
    --text-dark: #ffffff;
    --text-gray: #d0d0d0;
    --text-light: #b0b0b0;
    --bg-white: #050A10;
    --bg-light: #2B2E33;
    --bg-gray: #1a1d22;
    --border-color: #3a3d42;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;

    /* Spacing */
    --container-width: 1200px;
    --section-padding: 80px 0;
    --header-height: 70px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header - Light Background */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition-normal);
    border-bottom: 1px solid #e0e0e0;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
    color: var(--dark-black);
}

.logo-img {
    height: 45px;
    width: auto;
}

.nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--light-black);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
    padding: 4px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: var(--transition-fast);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark-black);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--dark-black) 0%, var(--primary-blue) 50%, var(--dark-black) 100%);
    color: var(--text-dark);
    margin-top: var(--header-height);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 60px 20px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 24px;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 40px;
    line-height: 1.8;
    opacity: 0.9;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 6px;
    transition: var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--primary-blue);
    color: var(--text-dark);
}

.btn-primary:hover {
    background: #004488;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--text-dark);
    border-color: var(--text-dark);
}

.btn-secondary:hover {
    background: var(--text-dark);
    color: var(--dark-black);
    transform: translateY(-2px);
}

.btn-media {
    display: inline-block;
    padding: 10px 24px;
    background: var(--primary-blue);
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 6px;
    transition: var(--transition-normal);
}

.btn-media:hover {
    background: #004488;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--primary-blue);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

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

.about-content {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-gray);
    line-height: 1.8;
    text-align: center;
}

/* Kylon Section */
.kylon-section {
    padding: var(--section-padding);
    background: var(--dark-black);
}

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

.kylon-text {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.kylon-description {
    font-size: 1.1rem;
    color: var(--text-gray);
    line-height: 1.8;
}

.kylon-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

.feature-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    color: var(--text-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.feature-text h4 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.feature-text p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.kylon-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

/* Departments Section */
.departments-section {
    padding: var(--section-padding);
    background: var(--bg-gray);
}

.departments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.department-card {
    background: #ffffff;
    padding: 50px 40px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid rgba(0, 51, 102, 0.1);
}

.department-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    border-color: var(--primary-blue);
}

.dept-card-logo {
    width: 250px;
    height: auto;
    margin-bottom: 24px;
}

.dept-card-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-black);
    margin-bottom: 12px;
}

.dept-card-tagline {
    font-size: 1rem;
    color: var(--light-black);
    font-style: italic;
    margin-bottom: 30px;
    line-height: 1.5;
}

.dept-btn {
    margin-top: auto;
    width: 100%;
    max-width: 250px;
}

/* Resources Section */
.resources-section {
    padding: var(--section-padding);
    background: var(--dark-black);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.resource-card {
    background: var(--mid-black);
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.resource-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.resource-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.resource-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.resource-description {
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 20px;
    line-height: 1.6;
}

.resource-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.resource-link:hover {
    color: var(--text-dark);
}

/* Media Section */
.media-section {
    padding: var(--section-padding);
    background: var(--bg-gray);
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.media-card {
    background: var(--mid-black);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.media-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.media-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--bg-gray);
}

.media-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

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

.media-content {
    padding: 24px;
}

.media-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-blue);
    color: var(--text-dark);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.media-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
    line-height: 1.4;
}

.media-excerpt {
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 16px;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--dark-black);
    color: var(--text-gray);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section {
    display: flex;
    flex-direction: column;
}

.footer-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-light);
}

.contact-item strong {
    color: var(--text-dark);
}

.contact-item a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: var(--transition-fast);
}

.contact-item a:hover {
    color: var(--text-dark);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--text-dark);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 44px;
    height: 44px;
    background: var(--mid-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-nav-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    font-size: 0.9rem;
}

.footer-nav-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-nav-links a:hover {
    color: var(--text-dark);
}

.footer-nav-links .separator {
    color: var(--border-color);
}

.trademarks {
    font-size: 0.8rem;
    color: var(--text-light);
    line-height: 1.6;
    font-style: italic;
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 992px) {
    .kylon-content {
        grid-template-columns: 1fr;
    }

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

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

    .hero-subtitle {
        font-size: 1.5rem;
    }
}

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

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

    .nav.active {
        display: flex;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        gap: 20px;
        border-bottom: 1px solid #e0e0e0;
    }

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

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-description {
        font-size: 1rem;
    }

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

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

    .resources-grid,
    .media-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero {
        min-height: 500px;
    }

    .hero-title {
        font-size: 1.75rem;
    }

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