:root {
    --color-text: #0A0A0A;
    --color-text-secondary: #1A1A1A;
    --color-text-muted: #525252;
    
    --color-accent: #059669;
    --color-accent-hover: #047857;
    
    --color-background: #FFFFFF;
    --color-background-alt: #FAFAFA;
    --color-border: #E5E5E5;
    --color-border-light: #F0F0F0;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --nav-height: 52px;
    --container-width: 1100px;
    
    --transition: 200ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-background);
}

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    transition: all var(--transition);
    cursor: pointer;
}

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

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

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

.btn-secondary:hover {
    color: var(--color-text-secondary);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    transition: all var(--transition);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 1px 0 var(--color-border-light);
}

.nav-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
}

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

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switch {
    display: flex;
    gap: 4px;
    background: var(--color-background-alt);
    border-radius: 6px;
    padding: 3px;
}

.lang-btn {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    background: transparent;
    color: var(--color-text-muted);
    transition: all var(--transition);
    cursor: pointer;
}

.lang-btn:hover {
    color: var(--color-text);
}

.lang-btn.active {
    background: var(--color-text);
    color: white;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-text);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-height) + 48px) 24px 48px;
    text-align: center;
}

.hero-inner {
    max-width: 800px;
}

.hero-title {
    font-size: clamp(40px, 7vw, 64px);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.hero-title-accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, #10B981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(18px, 2vw, 22px);
    color: var(--color-text-muted);
    line-height: 1.5;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.stats-section {
    padding: 80px 24px;
    background: var(--color-background-alt);
}

.stats-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 80px;
    flex-wrap: wrap;
}

.stat-card {
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

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

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-top: 8px;
}

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

.section-title {
    font-size: clamp(32px, 4vw, 40px);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-text-muted);
    max-width: 500px;
    margin: 0 auto;
}

.solutions, .services {
    padding: 80px 24px;
}

.solutions {
    background: var(--color-background);
}

.services {
    background: var(--color-background-alt);
}

.cards-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.card {
    padding: 32px;
    background: var(--color-background);
    border-radius: 16px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

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

.card:hover {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    border-color: transparent;
}

.services .card {
    background: var(--color-background-alt);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-text);
    border-radius: 12px;
    color: white;
    font-size: 24px;
    margin-bottom: 24px;
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.card-desc {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.about {
    padding: 80px 24px;
    background: var(--color-background);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-title {
    font-size: clamp(32px, 4vw, 40px);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.about-subtitle {
    font-size: 18px;
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

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

.cta-section {
    padding: 80px 24px;
    background: var(--color-text);
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 600;
    color: white;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
}

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

.cta-section .btn-primary {
    background: white;
    color: var(--color-text);
}

.cta-section .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
}

.cta-section .btn-secondary {
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.cta-section .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.footer {
    padding: 48px 24px;
    background: var(--color-background);
    border-top: 1px solid var(--color-border-light);
}

.footer-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
}

.footer-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.footer-links h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-muted);
    transition: color var(--transition);
}

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

.footer-bottom {
    max-width: var(--container-width);
    margin: 48px auto 0;
    padding-top: 24px;
    border-top: 1px solid var(--color-border-light);
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--color-text-muted);
}

@media (max-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-inner {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-background);
        padding: 24px;
        gap: 16px;
        border-top: 1px solid var(--color-border-light);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.active a {
        padding: 12px 0;
        border-bottom: 1px solid var(--color-border-light);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-actions {
        position: absolute;
        right: 60px;
    }
    
    .hero {
        min-height: auto;
        padding: calc(var(--nav-height) + 32px) 24px 48px;
    }
    
    .stats-grid {
        gap: 48px;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .card {
        padding: 24px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}