:root {
    /* Color System */
    --bg-primary: #0a0e14;
    --bg-secondary: #151921;
    --bg-tertiary: #1e242e;
    --text-primary: #ffffff;
    --text-secondary: #b8bec9;
    --text-muted: #6b7280;
    --accent-green: #00d9a3;
    --accent-orange: #ff6b35;
    --accent-hover: #00ffc4;
    
    /* Spacing System */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-2xl: 8rem;
    
    /* Typography Scale */
    --font-display: 'Space Mono', monospace;
    --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Transitions */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

h1 {
    font-size: clamp(2.5rem, 6vw, 5rem);
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    margin-bottom: var(--spacing-sm);
}

p {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--accent-green);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--accent-hover);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 20, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-logo img {
    height: 40px;
    width: auto;
}

.nav-logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

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

.nav-menu a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    transition: var(--transition-base);
}

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

.lang-switcher {
    display: flex;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 0.25rem;
    font-family: var(--font-display);
    font-size: 0.875rem;
}

.lang-switcher a {
    color: var(--text-muted);
    padding: 0.25rem 0.5rem;
}

.lang-switcher a.active {
    color: var(--accent-green);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Container System */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-small {
    padding: var(--spacing-xl) 0;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 120px;
    padding-bottom: 60px;
}

.hero-content {
    max-width: 900px;
}

.hero-subtitle {
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    color: var(--accent-green);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    display: block;
    opacity: 1;
    text-shadow: 0 2px 10px rgba(0, 217, 163, 0.3);
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    max-width: 700px;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 217, 163, 0.3);
}

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

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

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Card Component */
.card {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    padding: var(--spacing-lg);
    transition: var(--transition-base);
}

.card:hover {
    border-color: rgba(0, 217, 163, 0.3);
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Feature Blocks */
.feature-block {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.feature-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-green);
    opacity: 0;
    transition: var(--transition-base);
}

.feature-block:hover::before {
    opacity: 1;
}

/* Value Stack */
.value-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.value-label {
    font-size: 1.125rem;
    font-weight: 600;
}

.value-amount {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--accent-green);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

.fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-lg);
        transition: var(--transition-base);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* RTL Support */
[dir="rtl"] {
    direction: rtl;
}

[dir="rtl"] .nav-menu {
    right: -100%;
    left: auto;
}

[dir="rtl"] .nav-menu.active {
    right: 0;
}

[dir="rtl"] .feature-block::before {
    right: 0;
    left: auto;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-accent { color: var(--accent-green); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Product Grid */
.product-card {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    overflow: hidden;
    transition: var(--transition-base);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    border-color: rgba(0, 217, 163, 0.3);
}

.product-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    background: var(--bg-tertiary);
}

.product-content {
    padding: var(--spacing-md);
}

.product-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.product-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.product-price {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--accent-green);
    margin-bottom: var(--spacing-md);
}

/* Email Link Styling */
.email-link {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--accent-green);
    display: inline-block;
    margin-top: var(--spacing-sm);
}

/* Framework Visualization */
.framework-step {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    padding: var(--spacing-md);
    position: relative;
}

.framework-number {
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--accent-green);
    opacity: 0.2;
    position: absolute;
    top: 10px;
    right: 20px;
}

.framework-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}