:root {
    --electric-blue: #0066ff;
    --neon-purple: #9d00ff;
    --dark-slate: #0f172a;
    --light-text: #f8fafc;
    --dark-text: #1e293b;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition-base: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

@media (prefers-color-scheme: dark) {
    :root {
        --light-text: #1e293b;
        --dark-text: #f8fafc;
        --glass-bg: rgba(15, 23, 42, 0.7);
        --glass-border: rgba(255, 255, 255, 0.1);
    }
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--dark-text);
    background: linear-gradient(135deg, var(--dark-slate), #1e293b);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Particles.js container */
#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--light-text);
    text-decoration: none;
    display: flex;
    align-items: center;
}

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

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

.nav-links a {
    color: var(--light-text);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--electric-blue);
    transition: var(--transition-base);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 5%;
    position: relative;
    color: var(--light-text);
}

.hero-content {
    max-width: 800px;
    z-index: 10;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.typewriter {
    display: inline-block;
    border-right: 3px solid var(--electric-blue);
    white-space: nowrap;
    overflow: hidden;
    animation: blink-caret 0.75s step-end infinite;
}

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--electric-blue) }
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: linear-gradient(45deg, var(--electric-blue), var(--neon-purple));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 102, 255, 0.4);
    filter: brightness(1.1);
}

/* Sections */
.section {
    padding: 6rem 5%;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
    color: var(--light-text);
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--electric-blue), var(--neon-purple));
    border-radius: 2px;
}

.section-title p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.8;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 0 auto;
    max-width: 1200px;
}

.service-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition-slow);
    position: relative;
    border: 1px solid var(--glass-border);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(0, 102, 255, 0.1), rgba(157, 0, 255, 0.1));
    z-index: -1;
}

.card-bg {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition-slow);
}

.card-content {
    padding: 1.5rem;
    color: var(--light-text);
}

.card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.card-content p {
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.card-link {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    background: var(--electric-blue);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
}

.card-link:hover {
    background: var(--neon-purple);
    transform: translateY(-2px);
}

/* Card 1 - 3D Tilt + Zoom */
.service-card:nth-child(1):hover {
    transform: perspective(1000px) rotateX(5deg) rotateY(5deg) scale(1.05);
}

.service-card:nth-child(1):hover .card-bg {
    transform: scale(1.1);
}

/* Card 2 - Gradient Overlay + Scale */
.service-card:nth-child(2):hover {
    transform: scale(1.05);
}

.service-card:nth-child(2):hover::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(0, 102, 255, 0.5), rgba(157, 0, 255, 0.5));
    z-index: -1;
}

/* Card 3 - Neon Border Glow */
.service-card:nth-child(3):hover {
    box-shadow: 0 0 15px var(--electric-blue), 0 0 30px var(--neon-purple);
}

/* Telegram Channels */
.telegram-channels {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.channel-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition-base);
    border: 1px solid var(--glass-border);
    color: var(--light-text);
}

.channel-logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    border: 3px solid var(--electric-blue);
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.3);
}

.channel-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.channel-card p {
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

/* Channel 1 - Animated Gradient Button */
.join-button.gradient {
    background: linear-gradient(90deg, var(--electric-blue), var(--neon-purple), var(--electric-blue));
    background-size: 200% auto;
    animation: gradient 3s linear infinite;
}

@keyframes gradient {
    0% { background-position: 0% center }
    100% { background-position: 200% center }
}

/* Channel 2 - Pulse Animation */
.join-button.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1) }
    50% { transform: scale(1.05) }
    100% { transform: scale(1) }
}

/* Channel 3 - 3D Floating Effect */
.channel-card:nth-child(3) {
    transform-style: preserve-3d;
    perspective: 1000px;
}

.channel-card:nth-child(3):hover {
    transform: translateY(-10px) rotateX(5deg);
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.2);
}

.join-button {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    background: var(--electric-blue);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
    border: none;
    cursor: pointer;
}

.join-button:hover {
    background: var(--neon-purple);
    transform: translateY(-2px);
}

/* Registration Cards */
.registration-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.reg-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition-base);
    border: 1px solid var(--glass-border);
    color: var(--light-text);
    position: relative;
    overflow: hidden;
}

.reg-logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    border: 3px solid var(--electric-blue);
}

.reg-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.reg-card p {
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

/* Card 1 - Glowing Button */
.reg-button.glow {
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.reg-button.glow::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);
    z-index: -1;
    transition: var(--transition-base);
}

.reg-button.glow:hover::before {
    left: 100%;
}

/* Card 2 - Liquid Fill */
.reg-button.liquid {
    position: relative;
    overflow: hidden;
}

.reg-button.liquid::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.reg-button.liquid:hover::after {
    left: 100%;
}

/* Card 3 - Morphing Shape */
.reg-button.morph {
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.reg-button.morph:hover {
    border-radius: 5px;
}

.reg-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.8rem;
    background: linear-gradient(45deg, var(--electric-blue), var(--neon-purple));
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
    border: none;
    cursor: pointer;
}

.reg-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 102, 255, 0.3);
}

/* Footer */
footer {
    background: var(--dark-slate);
    color: var(--light-text);
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 1.5rem 0;
}

.footer-links a {
    color: var(--light-text);
    text-decoration: none;
    transition: var(--transition-base);
}

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

.copyright {
    opacity: 0.7;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .services-grid, .telegram-channels, .registration-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .navbar {
        padding: 1rem 5%;
    }

    .nav-links {
        display: none;
    }

    .services-grid, .telegram-channels, .registration-cards {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 4rem 5%;
    }

    .section-title h2 {
        font-size: 2rem;
    }
}

/* Lazy loading */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img.lazy-loaded {
    opacity: 1;
}