:root {
    --bg-primary: #121721;
    --bg-secondary: #1a2030;
    --bg-card: rgba(35, 45, 65, 0.75);
    --text-primary: #ffffff;
    --text-secondary: #c5d1e6;
    --accent-cyan: #0080FF;
    --accent-purple: #8b5cf6;
    --accent-blue: #3b82f6;
    --accent-orange: #fb923c;
    --glow-cyan: rgba(0, 128, 255, 0.5);
    --glow-purple: rgba(139, 92, 246, 0.3);
    --border-glow: rgba(0, 128, 255, 0.35);
}

body[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.95);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-cyan: #0080FF;
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --accent-orange: #f97316;
    --glow-cyan: rgba(0, 128, 255, 0.25);
    --glow-purple: rgba(168, 85, 247, 0.2);
    --border-glow: rgba(0, 128, 255, 0.2);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background 0.4s ease, color 0.4s ease;
}

/* Animated Background */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

    .background-container::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(ellipse at center, rgba(0, 128, 255, 0.05) 0%, transparent 70%);
        z-index: 1;
    }

.grid-lines {
    position: absolute;
    width: 200%;
    height: 200%;
    background-image: linear-gradient(rgba(0, 128, 255, 0.18) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 128, 255, 0.18) 1px, transparent 1px);
    background-size: 80px 80px;
    animation: gridMove 20s linear infinite;
    opacity: 0.45;
}

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

    100% {
        transform: translate(-80px, -80px);
    }
}

/* AI Neural Network Lines */
.neural-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.neural-line {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 128, 255, 0.6), transparent);
    opacity: 0;
    animation: neuralPulse 4s ease-in-out infinite;
}

@keyframes neuralPulse {
    0%, 100% {
        opacity: 0;
        transform: translateX(-100%);
    }

    50% {
        opacity: 0.5;
    }

    100% {
        transform: translateX(100%);
    }
}

/* Floating AI Data Nodes */
.ai-nodes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.ai-node {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #0080FF;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(0, 128, 255, 0.6);
    animation: nodeFloat 8s ease-in-out infinite;
    opacity: 0;
}

@keyframes nodeFloat {
    0%, 100% {
        opacity: 0;
        transform: translate(0, 0) scale(0.5);
    }

    50% {
        opacity: 1;
        transform: translate(var(--tx, 100px), var(--ty, -100px)) scale(1);
    }
}

/* Digital Rain Effect */
.digital-rain {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.rain-column {
    position: absolute;
    top: -100%;
    width: 2px;
    height: 100px;
    background: linear-gradient(transparent, rgba(0, 128, 255, 0.4), transparent);
    animation: rainFall 3s linear infinite;
    opacity: 0.3;
}

@keyframes rainFall {
    0% {
        top: -100px;
        opacity: 0;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        top: 100%;
        opacity: 0;
    }
}

/* Hexagon Pattern */
.hex-pattern {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0.06;
    background-image: radial-gradient(circle at 50% 50%, #0080FF 1px, transparent 1px), radial-gradient(circle at 0% 100%, #3b82f6 1px, transparent 1px);
    background-size: 60px 60px;
    background-position: 0 0, 30px 30px;
    animation: hexShift 15s linear infinite;
}

@keyframes hexShift {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(60px, 60px);
    }
}

/* Data Packets */
.data-packets {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.data-packet {
    position: absolute;
    width: 8px;
    height: 8px;
    background: #0080FF;
    box-shadow: 0 0 10px rgba(0, 128, 255, 0.7), 0 0 20px rgba(0, 128, 255, 0.4);
    border-radius: 2px;
    opacity: 0;
    animation: packetTravel 4s ease-in-out infinite;
}

@keyframes packetTravel {
    0% {
        opacity: 0;
        transform: translate(0, 0) scale(0.5);
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translate(var(--packet-x, 500px), var(--packet-y, 300px)) scale(1.2);
    }
}

/* Binary Code Stream */
.binary-stream {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: #0080FF;
    opacity: 0.18;
    font-weight: 600;
}

.binary-code {
    position: absolute;
    white-space: nowrap;
    animation: binaryScroll 8s linear infinite;
}

@keyframes binaryScroll {
    0% {
        transform: translateX(100%);
        opacity: 0;
    }

    10% {
        opacity: 0.3;
    }

    90% {
        opacity: 0.3;
    }

    100% {
        transform: translateX(-100%);
        opacity: 0;
    }
}

/* Data Connection Lines */
.connection-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.connection-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, #0080FF, #3b82f6, transparent);
    transform-origin: left center;
    opacity: 0;
    animation: connectionPulse 6s ease-in-out infinite;
}

@keyframes connectionPulse {
    0%, 100% {
        opacity: 0;
        transform: scaleX(0);
    }

    50% {
        opacity: 0.4;
        transform: scaleX(1);
    }
}

/* Processing Circles */
.processing-circles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.processing-circle {
    position: absolute;
    width: 60px;
    height: 60px;
    border: 2px solid #0080FF;
    border-radius: 50%;
    opacity: 0;
    animation: circleExpand 5s ease-out infinite;
}

    .processing-circle::before,
    .processing-circle::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        border-radius: 50%;
    }

    .processing-circle::before {
        width: 40px;
        height: 40px;
        border: 2px solid #3b82f6;
        animation: circleExpand 5s ease-out 0.5s infinite;
    }

    .processing-circle::after {
        width: 20px;
        height: 20px;
        border: 2px solid #60a5fa;
        animation: circleExpand 5s ease-out 1s infinite;
    }

@keyframes circleExpand {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }

    20% {
        opacity: 0.6;
    }

    100% {
        opacity: 0;
        transform: scale(2.5);
    }
}

/* Data Flow Arrows */
.data-arrows {
    position: absolute;
    width: 100%;
    height: 100%;
}

.data-arrow {
    position: absolute;
    width: 40px;
    height: 2px;
    background: #0080FF;
    opacity: 0;
    animation: arrowFlow 3s ease-in-out infinite;
}

    .data-arrow::after {
        content: '';
        position: absolute;
        right: -6px;
        top: -3px;
        width: 0;
        height: 0;
        border-left: 8px solid #0080FF;
        border-top: 4px solid transparent;
        border-bottom: 4px solid transparent;
    }

@keyframes arrowFlow {
    0%, 100% {
        opacity: 0;
        transform: translateX(-20px);
    }

    50% {
        opacity: 0.6;
        transform: translateX(20px);
    }
}

/* Scanning Line Effect */
.scan-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.scan-line {
    position: absolute;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #0080FF 50%, transparent);
    opacity: 0.2;
    animation: scanMove 8s linear infinite;
    box-shadow: 0 0 8px rgba(0, 128, 255, 0.4);
}

@keyframes scanMove {
    0% {
        top: -10px;
        opacity: 0;
    }

    50% {
        opacity: 0.3;
    }

    100% {
        top: 100%;
        opacity: 0;
    }
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: float 15s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 128, 255, 0.25) 0%, transparent 70%);
    top: -10%;
    right: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 128, 255, 0.15) 0%, transparent 70%);
    bottom: 10%;
    left: -5%;
    animation-delay: 5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.2) 0%, transparent 70%);
    top: 40%;
    left: 30%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(50px, -80px) scale(1.1);
    }

    66% {
        transform: translate(-30px, 60px) scale(0.9);
    }
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #0080FF;
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 6s ease-in-out infinite;
    box-shadow: 0 0 3px rgba(0, 128, 255, 0.6);
}

@keyframes particleFloat {
    0% {
        opacity: 0;
        transform: translateY(0) translateX(0);
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translateY(-100vh) translateX(50px);
    }
}

/* Container */
.container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    font-family: 'Inter', sans-serif;
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px var(--glow-cyan);
}

.logo-icon {
    width: 180px;
    height: 48px;
    background: transparent;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

    .logo-icon img {
        filter: drop-shadow(0 0 10px rgba(0, 128, 255, 0.4));
    }

.nav-controls {
    display: flex;
    gap: 20px;
    align-items: center;
}

.theme-toggle, .lang-toggle {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glow);
    border-radius: 50px;
    padding: 10px 20px;
    color: var(--text-primary);
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

    .theme-toggle:hover, .lang-toggle:hover {
        border-color: var(--accent-cyan);
        box-shadow: 0 0 20px var(--glow-cyan);
        transform: translateY(-2px);
    }

/* Hero Section */
.hero {
    /*    text-align: center;
    padding: 100px 0 150px;
    position: relative;*/
    min-height: 57vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

    .hero h1 {
        font-family: 'Inter', sans-serif;
        font-size: clamp(40px, 7vw, 80px);
        font-weight: 900;
        line-height: 1.1;
        margin-bottom: 30px;
        background: linear-gradient(135deg, #0080FF 0%, #3b82f6 50%, #60a5fa 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        animation: textGlow 3s ease-in-out infinite;
        position: relative;
        display: inline-block;
    }

@keyframes textGlow {
    0%, 100% {
        filter: drop-shadow(0 0 20px var(--glow-cyan));
    }

    50% {
        filter: drop-shadow(0 0 40px var(--glow-purple));
    }
}

.hero p {
    font-size: clamp(18px, 2.5vw, 24px);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 50px;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 18px 40px;
    border-radius: 50px;
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: #0a0e1a;
    box-shadow: 0 0 30px var(--glow-cyan);
}

    .btn-primary::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: linear-gradient(45deg, transparent, rgba(255,255,255,0.3), transparent);
        transform: rotate(45deg);
        animation: buttonShine 3s infinite;
    }

@keyframes buttonShine {
    0% {
        transform: translateX(-100%) rotate(45deg);
    }

    100% {
        transform: translateX(100%) rotate(45deg);
    }
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px var(--glow-cyan);
}

.btn-secondary {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 2px solid var(--accent-cyan);
    box-shadow: 0 0 20px var(--glow-cyan);
}

    .btn-secondary:hover {
        background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
        color: #0a0e1a;
        transform: translateY(-3px);
        box-shadow: 0 10px 40px var(--glow-cyan);
    }

/* Features Section */
.features {
    padding: 80px 0 120px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glow);
    border-radius: 20px;
    padding: 40px 30px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

    .feature-card.visible {
        animation: fadeInUp 0.6s ease forwards;
    }

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

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--glow-cyan), transparent);
    transition: left 0.5s;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-cyan);
    box-shadow: 0 20px 60px var(--glow-cyan);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px var(--glow-cyan);
    position: relative;
}

    .feature-icon svg {
        width: 28px;
        height: 28px;
        stroke: white;
        fill: none;
        stroke-width: 2;
        stroke-linecap: round;
        stroke-linejoin: round;
    }

    .feature-icon::after {
        content: '';
        position: absolute;
        inset: -2px;
        background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
        border-radius: 15px;
        z-index: -1;
        opacity: 0;
        transition: opacity 0.3s;
    }

.feature-card:hover .feature-icon::after {
    opacity: 1;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.2);
        opacity: 0;
    }
}

.feature-card h3 {
    font-family: 'Inter', sans-serif;
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 15px;
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    text-align: center;
}

.cta-card {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 30px;
    padding: 80px 40px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 30px 80px var(--glow-purple);
}

    .cta-card::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
        animation: rotate 20s linear infinite;
    }

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.cta-card h2 {
    font-family: 'Inter', sans-serif;
    font-size: clamp(28px, 5vw, 48px);
    margin-bottom: 20px;
    color: #ffffff;
    position: relative;
    font-weight: 900;
}

.cta-card p {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
    position: relative;
}

.btn-cta {
    background: #ffffff;
    color: var(--accent-blue);
    padding: 20px 50px;
    font-size: 18px;
    font-weight: 700;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 15px;
}

    .btn-cta:hover {
        transform: translateY(-3px) scale(1.05);
        box-shadow: 0 15px 50px rgba(255,255,255,0.3);
    }

.arrow {
    transition: transform 0.3s;
}

.btn-cta:hover .arrow {
    transform: translateX(10px);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-glow);
    padding: 30px 0 30px;
    position: absolute;
    width: 100%;
    bottom: 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-logo {
    width: 160px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

    .footer-logo img {
        filter: drop-shadow(0 0 8px rgba(0, 128, 255, 0.3));
    }

.footer-links {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

    .footer-links a {
        color: var(--text-secondary);
        text-decoration: none;
        font-size: 14px;
        transition: all 0.3s;
    }

        .footer-links a:hover {
            color: var(--accent-cyan);
            text-shadow: 0 0 10px var(--glow-cyan);
        }

.copyright {
    text-align: center;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-glow);
    color: var(--text-secondary);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0;
    }

    nav {
        flex-direction: column;
        gap: 20px;
    }

    .hero {
        padding: 0;
        margin: 0;
        justify-content: flex-start;
    }

        .hero h1 {
            margin-bottom: 10px;
            font-size: clamp(32px, 8vw, 48px);
        }

        .hero p {
            margin: 0 auto 10px;
        }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .cta-card {
        padding: 60px 30px;
    }

    footer {
        padding: 10px 0 10px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 0;
    }

    .footer-links {
        justify-content: center;
        gap: 5px;
    }

        .footer-links a {
            font-size: 13px;
        }

    .footer-logo {
        height: 30px;
    }

    .copyright {
        margin-top: 10px;
        padding-top: 10px;
        font-size: 13px;
    }
}

/* Light mode: keep logo blue, just remove extra dark-mode glow that looks odd on white */
body[data-theme="light"] .logo-icon img,
body[data-theme="light"] .footer-logo img {
    filter: drop-shadow(0 0 6px rgba(0, 128, 255, 0.2));
}

/* Scroll animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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