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

:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-alt: #f0f4f8;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #999999;
    --accent-blue: #2563eb;
    --accent-blue-light: #3b82f6;
    --accent-blue-dark: #1e40af;
    --accent-blue-bg: #eff6ff;
    --border-color: #e5e7eb;
    --wave-color: var(--accent-blue-bg);
    
    /* Spacing - Optimized for compact layout */
    --spacing-xs: 0.375rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 2.5rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-alt: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-light: #808080;
    --accent-blue: #3b82f6;
    --accent-blue-light: #60a5fa;
    --accent-blue-dark: #2563eb;
    --accent-blue-bg: #1e3a5f;
    --border-color: #2a2a2a;
    --wave-color: var(--bg-alt);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 15px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

[data-theme="dark"] .navbar {
    background-color: rgba(10, 10, 10, 0.95);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.logo-img {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.logo-shield {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-blue-dark), var(--accent-blue));
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-blue);
    transition: width 0.3s ease;
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.lang-toggle,
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.lang-toggle:hover,
.theme-toggle:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-blue);
}

.theme-icon {
    width: 20px;
    height: 20px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    margin-top: 70px;
    padding: var(--spacing-sm) 0;
    background: linear-gradient(135deg, var(--accent-blue-bg) 0%, var(--bg-primary) 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--accent-blue-dark);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.hero-tagline {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn {
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: var(--accent-blue);
    border: 2px solid var(--accent-blue);
}

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


/* Wave Divider */
.wave-divider {
    position: relative;
    height: 120px;
    margin-top: var(--spacing-lg);
    color: var(--wave-color);
}

.wave-divider svg {
    width: 100%;
    height: 100%;
    display: block;
}

.wave-text {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Sections */
.section {
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-primary);
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--accent-blue-dark);
    margin-bottom: var(--spacing-xs);
    text-align: center;
    line-height: 1.3;
}

.section-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 400;
}

.content-box {
    background-color: var(--bg-primary);
    border: 1px solid var(--accent-blue-bg);
    border-radius: 8px;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.content-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
}

/* Subsection */
.subsection {
    margin: var(--spacing-md) 0;
}

/* Section 2.1 & 2.2 with Ecosystem Diagram - side-by-side layout */
.subsection-with-diagram {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
    margin-top: var(--spacing-md);
}

.subsection-column {
    min-width: 0;
}

.ecosystem-diagram-column {
    position: sticky;
    top: 90px;
    align-self: start;
}

.ecosystem-diagram {
    margin: 0;
    text-align: center;
}

.ecosystem-diagram-img {
    width: 100%;
    max-width: 100%;
    max-height: 420px;
    height: auto;
    object-fit: contain;
    object-position: top center;
    border-radius: 8px;
    border: 1px solid var(--accent-blue-bg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.ecosystem-diagram-caption {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.subsection-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--accent-blue-dark);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

.subsection-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: 400;
}

/* Companies Grid */
.companies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.company-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--accent-blue-bg);
    border-radius: 8px;
    padding: var(--spacing-sm);
    transition: var(--transition);
}

.company-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.15);
    border-color: var(--accent-blue);
}

.company-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.company-logo-wrap {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.company-logo {
    max-height: 60px;
    max-width: 140px;
    width: auto;
    object-fit: contain;
}

.company-card h4 {
    font-size: 1.1rem;
    color: var(--accent-blue-dark);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.company-name-en {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-style: italic;
}

.company-desc {
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 0.9rem;
}

/* Service Boxes */
.service-boxes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.service-box {
    background: linear-gradient(135deg, var(--accent-blue-bg), var(--bg-primary));
    border-radius: 8px;
    padding: var(--spacing-sm);
    position: relative;
    transition: var(--transition);
    border: 1px solid transparent;
}

.service-box:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.2);
    border-color: var(--accent-blue);
}

.service-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.service-box h4 {
    font-size: 1.2rem;
    color: var(--accent-blue-dark);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

.service-title-en {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.service-desc {
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 0.9rem;
}

/* Advantages */
.advantages-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
}

.advantage-item {
    padding: var(--spacing-sm);
}

.advantage-item h4 {
    font-size: 1.2rem;
    color: var(--accent-blue-dark);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

.advantage-item p:first-of-type {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.advantage-desc {
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 0.9rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--accent-blue-dark), var(--accent-blue));
    padding: var(--spacing-lg) 0;
    text-align: center;
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    background-color: white;
    border-radius: 50% 50% 0 50%;
    clip-path: polygon(0% 100%, 0% 0%, 100% 0%, 100% 70%);
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.3;
}

.cta-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    line-height: 1.4;
}

/* Mission Section */
.mission-section {
    background: linear-gradient(135deg, var(--accent-blue-bg), var(--bg-primary));
    padding: var(--spacing-lg) 0;
}

.mission-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

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

.mission-item h3 {
    font-size: 1.5rem;
    color: var(--accent-blue-dark);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

.mission-item p:first-of-type {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.mission-text {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.6;
}

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

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item h4 {
    font-size: 1.1rem;
    color: var(--accent-blue-dark);
    margin-bottom: var(--spacing-xs);
}

.contact-item p {
    color: var(--text-primary);
    font-size: 0.95rem;
}

.contact-form {
    background-color: var(--bg-primary);
    padding: var(--spacing-sm);
    border-radius: 8px;
    border: 1px solid var(--accent-blue-bg);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: 8px;
    display: none;
}

.form-message.success {
    background-color: #d1fae5;
    color: #065f46;
    display: block;
}

.form-message.error {
    background-color: #fee2e2;
    color: #991b1b;
    display: block;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--accent-blue-bg), var(--bg-primary));
    padding: var(--spacing-lg) 0 var(--spacing-md);
    text-align: center;
}


.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

    .ecosystem-diagram-column {
        position: static;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
        transition: left 0.3s ease;
    }

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

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


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

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

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

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

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


    .companies-grid,
    .service-boxes,
    .advantages-list {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

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

    .section-title {
        font-size: 1.375rem;
    }

    .footer-title {
        font-size: 3rem;
    }
}

/* Device-specific optimizations */
/* Mobile optimizations */
body.device-mobile {
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body.device-mobile .hero-title {
    font-size: 1.5rem;
    line-height: 1.3;
}

body.device-mobile .section-title {
    font-size: 1.375rem;
}

body.device-mobile .btn {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    width: 100%;
    max-width: 300px;
    touch-action: manipulation;
}

body.device-mobile .nav-link {
    padding: 0.75rem 0;
    font-size: 1rem;
}

body.device-mobile .content-box {
    padding: var(--spacing-sm);
}

/* Tablet optimizations */
body.device-tablet .hero-title {
    font-size: 2rem;
}

body.device-tablet .section-title {
    font-size: 1.75rem;
}

/* Desktop optimizations */
body.device-desktop .hero {
    min-height: auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

body.device-desktop .companies-grid,
body.device-desktop .service-boxes {
    grid-template-columns: repeat(3, 1fr);
}

/* Touch-friendly optimizations for mobile */
@media (hover: none) and (pointer: coarse) {
    .btn, .nav-link, .lang-toggle, .theme-toggle {
        min-height: 44px;
        min-width: 44px;
    }
    
    .nav-link {
        padding: 1rem;
    }
}