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

:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-surface-2: #1a1a1a;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-accent: #ffffff;
    --color-border: #2a2a2a;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s ease;
}

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

.cta-button {
    padding: 10px 24px;
    background: var(--color-text);
    color: var(--color-bg) !important;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.2);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 40px 80px;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: clamp(48px, 7vw, 96px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 32px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hero-title .line {
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

.hero-title .line:nth-child(2) {
    animation-delay: 0.2s;
}

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

.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    max-width: 800px;
    margin: 0 auto 48px;
    line-height: 1.7;
    opacity: 0;
    animation: fadeInUp 1s ease 0.4s forwards;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
}

.btn-primary {
    padding: 16px 40px;
    background: var(--color-text);
    color: var(--color-bg);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 2px solid var(--color-text);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    padding: 16px 40px;
    background: transparent;
    color: var(--color-text);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    border: 2px solid var(--color-border);
    transition: all 0.3s ease;
}

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

.hero-visual {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    opacity: 0.15;
}

.grid-background {
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--color-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

/* Section Styles */
section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    display: inline-block;
    font-size: 14px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* Expertise Section */
.expertise {
    background: var(--color-surface);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
}

.expertise-card {
    background: var(--color-bg);
    padding: 48px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-text);
    transition: width 0.4s ease;
}

.expertise-card:hover::before {
    width: 100%;
}

.expertise-card:hover {
    background: var(--color-surface);
    transform: translateY(-8px);
}

.card-number {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    letter-spacing: 0.1em;
}

.expertise-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
    font-weight: 600;
}

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

/* Services Section */
.services-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.services-left {
    position: sticky;
    top: 120px;
}

.services-description {
    color: var(--color-text-secondary);
    font-size: 18px;
    line-height: 1.7;
    margin-top: 24px;
}

.services-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.service-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateX(50px);
}

.service-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.service-item:hover {
    border-color: var(--color-text);
    transform: translateX(-8px);
}

.service-icon {
    font-size: 32px;
    flex-shrink: 0;
}

.service-content h4 {
    font-size: 20px;
    margin-bottom: 8px;
    font-weight: 600;
}

.service-content p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* References Section */
.references {
    background: var(--color-surface);
}

.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.reference-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 40px;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(30px);
}

.reference-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.reference-card:hover {
    border-color: var(--color-text);
    transform: translateY(-8px);
}

.reference-content h3 {
    font-size: 24px;
    margin-bottom: 16px;
    font-weight: 600;
}

.reference-content p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.reference-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    padding: 6px 16px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-left {
    position: sticky;
    top: 120px;
}

.contact-info {
    margin-top: 48px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-item strong {
    font-size: 14px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.info-item a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 20px;
    transition: color 0.3s ease;
}

.info-item a:hover {
    color: var(--color-text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    padding: 16px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text);
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-text);
    background: var(--color-surface-2);
}

.contact-form textarea {
    resize: vertical;
    min-height: 150px;
}

/* Footer */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 60px 0 40px;
    background: var(--color-surface);
}

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

.footer-left p {
    color: var(--color-text-secondary);
    margin-top: 8px;
}

.footer-right {
    display: flex;
    gap: 32px;
}

.footer-right a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 1024px) {
    .services-layout,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .services-left,
    .contact-left {
        position: static;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }
    
    .nav-container {
        padding: 20px 24px;
    }
    
    .nav-links {
        gap: 20px;
    }
    
    .nav-links a {
        font-size: 14px;
    }
    
    .hero {
        padding: 100px 24px 60px;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 16px;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }
    
    section {
        padding: 80px 0;
    }
    
    .section-header {
        margin-bottom: 60px;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .expertise-card {
        padding: 32px;
    }
    
    .references-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }
    
    .footer-right {
        flex-direction: column;
        gap: 16px;
    }
}