/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #004e17;
    --primary-light: #e8f5ec;
    --primary-dark: #003d12;
    --bg-primary: #ffffff;
    --bg-secondary: #f8faf9;
    --bg-dark: #1a1a1a;
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --text-muted: #888888;
    --text-light: #ffffff;
    --border: #e5e5e5;
    --gradient: linear-gradient(135deg, #004e17 0%, #007a24 100%);
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.02em;
}

.logo-sub {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 78, 23, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 78, 23, 0.35);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-muted);
}

.btn-nav {
    padding: 10px 20px;
    font-size: 0.9rem;
    background: var(--primary);
    color: white;
}

.btn-nav:hover {
    background: var(--primary-dark);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: 120px 24px 80px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 70% 20%, rgba(0, 78, 23, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 30% 80%, rgba(0, 78, 23, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-tag {
    display: inline-block;
    padding: 8px 16px;
    background: var(--primary-light);
    border: 1px solid rgba(0, 78, 23, 0.15);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 64px;
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Sections */
.section {
    padding: 120px 0;
}

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

.section-dark {
    background: var(--bg-dark);
    color: var(--text-light);
}

.section-highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(0, 78, 23, 0.1);
    border: 1px solid rgba(0, 78, 23, 0.15);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-dark .section-tag,
.section-highlight .section-tag {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
    color: white;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

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

.section-dark .section-desc {
    color: rgba(255, 255, 255, 0.7);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.service-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 78, 23, 0.2);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--primary);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary);
    transition: gap 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.service-link:hover {
    gap: 8px;
}

/* Software Section */
.software-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.software-text h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 20px;
}

.software-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 32px;
}

.feature-list {
    list-style: none;
    margin-bottom: 32px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-secondary);
    font-size: 1rem;
}

.feature-list svg {
    color: var(--primary);
    flex-shrink: 0;
}

.software-visual {
    display: grid;
    gap: 16px;
}

.software-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all 0.3s ease;
}

.software-card:hover {
    border-color: rgba(0, 78, 23, 0.3);
    box-shadow: var(--shadow);
}

.software-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.software-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.software-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 20px;
}

.about-text > p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 32px;
}

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

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

.about-feature h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.about-feature p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

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

.certification-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cert-card {
    background: var(--primary-light);
    border: 1px solid rgba(0, 78, 23, 0.15);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
}

.cert-badge {
    display: inline-block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.cert-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Education Section */
.education-content {
    max-width: 900px;
    margin: 0 auto;
}

.education-text {
    text-align: center;
    margin-bottom: 48px;
}

.education-text h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.education-text p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.section-highlight .gradient-text {
    background: linear-gradient(135deg, #ffffff 0%, #a8e6cf 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}

.edu-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius);
    padding: 20px 24px;
    font-size: 0.95rem;
}

.edu-item svg {
    flex-shrink: 0;
    opacity: 0.9;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.contact-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 0.95rem;
    opacity: 0.8;
}

/* Footer */
.footer {
    background: #111111;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 30px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 12px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.footer-logo .logo-text {
    color: white;
}

.footer-logo .logo-sub {
    color: rgba(255, 255, 255, 0.5);
}

.footer-links {
    display: flex;
    gap: 16px;
    align-items: center;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

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

.footer-links span {
    color: rgba(255, 255, 255, 0.3);
}

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

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* Mobile */
@media (max-width: 900px) {
    .software-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .about-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .btn-nav {
        display: none;
    }
    
    .hero {
        padding: 100px 20px 60px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 32px;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }
}