:root {
    /* Default Light Mode */
    --color-bg: #f8fafc;
    --color-surface: rgba(255, 255, 255, 0.7);
    --color-surface-hover: rgba(255, 255, 255, 0.9);
    --color-primary: #0284c7;
    --color-primary-dark: #0369a1;
    --color-secondary: #4f46e5;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-border: rgba(0, 0, 0, 0.1);
    
    --font-main: 'Inter', sans-serif;
    --transition: all 0.3s ease;
}

body.dark-mode {
    --color-bg: #0f172a;
    --color-surface: rgba(30, 41, 59, 0.7);
    --color-surface-hover: rgba(30, 41, 59, 0.9);
    --color-primary: #38bdf8;
    --color-primary-dark: #0284c7;
    --color-secondary: #818cf8;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-border: rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(56, 189, 248, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(129, 140, 248, 0.15) 0%, transparent 50%);
    background-attachment: fixed;
}

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

ul {
    list-style: none;
}

/* Typography & Utilities */
.text-gradient {
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.btn-primary, .btn-primary-outline, .btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    color: #fff;
    border: none;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.6);
}

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

.btn-primary-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 1.5rem 0;
}

.navbar.scrolled {
    background: var(--color-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
}

.logo span {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-weight: 400;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    transition: var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
    background-color: var(--color-text);
}

.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    margin-left: 1rem;
    transition: var(--transition);
}

.theme-toggle-btn:hover {
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem 2rem;
    gap: 4rem;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.hero-content p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-graphics {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Glassmorphism Cards */
.glass-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 2rem;
    position: absolute;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.5s ease;
}

.glass-card:hover {
    transform: translateY(-10px) scale(1.02);
}

.main-card {
    z-index: 2;
    width: 300px;
    top: 10%;
    left: 10%;
}

.secondary-card {
    z-index: 1;
    width: 260px;
    bottom: 10%;
    right: 10%;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(255, 255, 255, 0.01) 100%);
}

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

.glass-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

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

/* About Section */
.about {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 30px;
    padding: 4rem;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

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

.stat-item {
    text-align: center;
    padding: 2rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 20px;
    border: 1px solid var(--color-border);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-weight: 600;
    color: var(--color-text-muted);
}

/* Services Section */
.services {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

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

.service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 2.5rem;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    background: var(--color-surface-hover);
    border-color: rgba(56, 189, 248, 0.3);
}

.service-card.highlight {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(129, 140, 248, 0.1) 100%);
    border-color: rgba(129, 140, 248, 0.4);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.service-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* CTA */
.cta {
    padding: 6rem 2rem;
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.2) 0%, rgba(30, 41, 59, 0.4) 100%);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: 30px;
    padding: 4rem 2rem;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-content p {
    color: var(--color-text-muted);
    margin-bottom: 2.5rem;
    font-size: 1.1rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--color-border);
    padding: 4rem 2rem 2rem;
    background: rgba(0, 0, 0, 0.2);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 800;
}

.footer-brand span {
    color: var(--color-primary);
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s forwards cubic-bezier(0.2, 0.8, 0.2, 1);
}

.delay-1 {
    animation-delay: 0.2s;
}

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

.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 8rem;
    }
    
    .hero-content p {
        margin: 0 auto 2rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-graphics {
        height: 300px;
    }
    
    .main-card {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .secondary-card {
        display: none;
    }
    
    .about-container {
        grid-template-columns: 1fr;
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    .about-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .about-text h2 {
        font-size: 2rem;
        word-break: break-word;
    }
    
    .stat-item {
        padding: 1.5rem;
    }

    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--color-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.5);
        padding: 2rem 0;
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links li {
        margin: 1rem 0;
    }
    
    .mobile-menu-btn.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .mobile-menu-btn.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .footer-container {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}