:root {
    --primary-dark: #0a0e27;
    --primary-blue: #1e3a8a;
    --accent-blue: #3b82f6;
    --light-blue: #60a5fa;
    --dark-gray: #1f2937;
    --medium-gray: #4b5563;
    --light-gray: #f3f4f6;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #0a0e27 0%, #1e3a8a 100%);
    --gradient-accent: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(10, 14, 39, 0.95) 0%, rgba(30, 58, 138, 0.9) 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.7;
    color: var(--dark-gray);
    overflow-x: hidden;
    background: var(--white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.75rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }

p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--medium-gray);
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

header.scrolled {
    background: rgba(10, 14, 39, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.25rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-accent {
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
    position: relative;
}

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

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--gradient-primary);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3rem;
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-subtitle {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--light-blue);
    margin-bottom: 1.5rem;
    animation: fadeInDown 1s ease;
}

.hero h1 {
    font-size: 4.5rem;
    color: var(--white);
    margin-bottom: 1.5rem;
    line-height: 1.1;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-description {
    font-size: 1.35rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: inline-block;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--accent-blue);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: var(--light-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
}

/* Section Styles */
section {
    padding: 120px 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-label {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--accent-blue);
    margin-bottom: 1rem;
}

.section-title {
    font-size: 3rem;
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
}

.section-description {
    font-size: 1.25rem;
    color: var(--medium-gray);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
    margin-top: 4rem;
}

.about-content h3 {
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.about-content p {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    line-height: 1.9;
}

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

.stat-card {
    background: var(--gradient-primary);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* Timeline Section */
.timeline-section {
    background: var(--light-gray);
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 4rem auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: var(--gradient-accent);
}

.timeline-item {
    display: flex;
    margin-bottom: 4rem;
    position: relative;
}

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

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

.timeline-content {
    width: 45%;
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.timeline-year {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-blue);
    margin-bottom: 1rem;
    line-height: 1;
}

.timeline-content h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.timeline-content p {
    font-size: 1rem;
    line-height: 1.7;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    background: var(--accent-blue);
    border: 5px solid var(--white);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--accent-blue);
    z-index: 10;
}

/* Business Units Section */
.business-units {
    background: var(--white);
}

.units-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.unit-card {
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 16px;
    padding: 3rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.unit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.unit-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
    border-color: var(--accent-blue);
}

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

.unit-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

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

.unit-card p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.unit-year {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-blue);
    letter-spacing: 1px;
}

/* Differentials Section */
.differentials {
    background: var(--primary-dark);
    color: var(--white);
}

.differentials .section-label {
    color: var(--light-blue);
}

.differentials .section-title {
    color: var(--white);
}

.differentials .section-description {
    color: rgba(255, 255, 255, 0.8);
}

.diff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

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

.diff-icon {
    width: 80px;
    height: 80px;
    background: rgba(59, 130, 246, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    transition: all 0.3s ease;
}

.diff-item:hover .diff-icon {
    background: var(--accent-blue);
    transform: scale(1.1);
}

.diff-item h3 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.diff-item p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.contact-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-card h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.contact-card p {
    font-size: 1rem;
    color: var(--medium-gray);
}

.contact-card a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
}

/* Footer */
footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 4rem 3rem 2rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-about h3 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.footer-about p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 0.9rem;
}

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

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

/* Responsive Design */
@media (max-width: 1024px) {
    nav {
        padding: 1rem 2rem;
    }
    
    .nav-links {
        gap: 1.5rem;
    }
    
    h1 { font-size: 3rem; }
    h2 { font-size: 2.25rem; }
    
    .hero h1 {
        font-size: 3.5rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 80px 2rem;
    }
    
    nav {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column !important;
        padding-left: 50px;
    }
    
    .timeline-content {
        width: 100%;
    }
    
    .timeline-dot {
        left: 20px;
    }
    
    .units-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 0.875rem 2rem;
        font-size: 0.95rem;
    }
}