:root {
    --bg-deep: #050810;
    --bg-surface: #0a0e1a;
    --primary-neon: #00f2ff;
    --accent-neon: #39ff14;
    --purple-glow: #b026ff;
    --text-primary: #e0f7ff;
    --text-secondary: #a0b4c0;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 16px;
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-deep);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.7;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 242, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(176, 38, 255, 0.05) 0%, transparent 40%);
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Typography */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-neon) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); margin-top: 2.5rem; }
h3 { font-size: 1.3rem; color: var(--accent-neon); -webkit-text-fill-color: var(--accent-neon); margin-top: 1.5rem; }

p { margin-bottom: 1.2rem; color: var(--text-secondary); font-size: 1.05rem; }
a { color: var(--primary-neon); text-decoration: none; transition: var(--transition-smooth); }
a:hover { color: var(--accent-neon); text-shadow: 0 0 8px var(--accent-neon); }

ul, ol { margin-bottom: 1.5rem; padding-left: 1.5rem; color: var(--text-secondary); }
li { margin-bottom: 0.5rem; }

/* Glassmorphism Utilities */
.glass-header, .glass-card, .glass-card-3d, .glass-footer {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}

/* Header */
.glass-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo-text {
    font-weight: 800;
    font-size: 1.2rem;
    background: linear-gradient(90deg, var(--primary-neon), var(--accent-neon));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-neon);
    transition: width 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--primary-neon);
    transition: 0.3s;
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    perspective: 1000px;
}

.animated-bg-grid {
    position: absolute;
    width: 200%;
    height: 200%;
    background-image: 
        linear-gradient(rgba(0, 242, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 242, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    transform: perspective(500px) rotateX(60deg) translateY(-100px) translateZ(-200px);
    animation: gridMove 20s linear infinite;
    z-index: -2;
}

@keyframes gridMove {
    0% { transform: perspective(500px) rotateX(60deg) translateY(0) translateZ(-200px); }
    100% { transform: perspective(500px) rotateX(60deg) translateY(50px) translateZ(-200px); }
}

.particles-container {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-neon);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary-neon);
    animation: floatParticle 10s infinite ease-in-out;
}

@keyframes floatParticle {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(-100vh) translateX(50px); }
}

.hero-3d-container {
    position: relative;
    width: 400px;
    height: 400px;
    transform-style: preserve-3d;
    transition: transform 0.1s ease-out;
    display: flex;
    justify-content: center;
    align-items: center;
}

.orbit-ring {
    position: absolute;
    border: 2px solid rgba(0, 242, 255, 0.3);
    border-radius: 50%;
    transform-style: preserve-3d;
}

.ring-1 {
    width: 300px;
    height: 300px;
    animation: rotate1 15s linear infinite;
    border-top-color: var(--primary-neon);
    border-bottom-color: var(--accent-neon);
    box-shadow: 0 0 20px rgba(0, 242, 255, 0.2);
}

.ring-2 {
    width: 350px;
    height: 350px;
    animation: rotate2 20s linear infinite reverse;
    border-left-color: var(--purple-glow);
    border-right-color: var(--primary-neon);
}

.ring-3 {
    width: 400px;
    height: 400px;
    animation: rotate3 25s linear infinite;
    border: 1px dashed rgba(57, 255, 20, 0.4);
}

@keyframes rotate1 { 0% { transform: rotateX(70deg) rotateZ(0deg); } 100% { transform: rotateX(70deg) rotateZ(360deg); } }
@keyframes rotate2 { 0% { transform: rotateY(60deg) rotateZ(0deg); } 100% { transform: rotateY(60deg) rotateZ(360deg); } }
@keyframes rotate3 { 0% { transform: rotateX(45deg) rotateY(45deg) rotateZ(0deg); } 100% { transform: rotateX(45deg) rotateY(45deg) rotateZ(360deg); } }

.process-visualizer {
    position: absolute;
    width: 200px;
    height: 200px;
    transform: translateZ(50px);
    display: flex;
    justify-content: center;
    align-items: center;
}

.tile-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    transform: rotateX(20deg);
}

.tile {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    transition: all 0.5s ease;
}

.tile.dirty {
    background: rgba(100, 80, 60, 0.6);
    border-color: rgba(100, 80, 60, 0.8);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
}

.tile.clean {
    background: rgba(0, 242, 255, 0.2);
    border-color: var(--primary-neon);
    box-shadow: 0 0 15px var(--primary-neon), inset 0 0 10px rgba(0, 242, 255, 0.3);
}

.center-tile {
    background: rgba(57, 255, 20, 0.1);
    border-color: var(--accent-neon);
    animation: pulseClean 2s infinite;
}

@keyframes pulseClean {
    0%, 100% { box-shadow: 0 0 10px var(--accent-neon); }
    50% { box-shadow: 0 0 25px var(--accent-neon), 0 0 40px rgba(57, 255, 20, 0.4); }
}

.cleaning-wave {
    position: absolute;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--primary-neon), transparent);
    top: 0;
    left: 0;
    opacity: 0;
    box-shadow: 0 0 20px var(--primary-neon);
}

.stage-prepare .cleaning-wave {
    animation: waveSweep 2s ease-in-out forwards;
}

@keyframes waveSweep {
    0% { top: 0; opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

.hero-text-layer {
    position: absolute;
    bottom: -80px;
    text-align: center;
    transform: translateZ(80px);
    width: 100%;
}

.glitch-text {
    font-size: 1.8rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(0, 242, 255, 0.5);
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--accent-neon);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-top: 0.5rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    animation: bounce 2s infinite;
}

.mouse-icon {
    width: 24px;
    height: 40px;
    border: 2px solid var(--primary-neon);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--accent-neon);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 1.5s infinite;
}

@keyframes scrollWheel {
    0% { top: 6px; opacity: 1; }
    100% { top: 20px; opacity: 0; }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* Layout */
.content-wrapper {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    position: relative;
}

/* TOC Sidebar */
.toc-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.toc-container {
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

.toc-container h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary-neon);
    -webkit-text-fill-color: var(--primary-neon);
}

.toc-toggle {
    display: none;
    width: 100%;
    padding: 0.8rem;
    background: rgba(0, 242, 255, 0.1);
    border: 1px solid var(--primary-neon);
    color: var(--primary-neon);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    margin-bottom: 1rem;
    transition: var(--transition-smooth);
}

.toc-toggle:hover {
    background: rgba(0, 242, 255, 0.2);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-link {
    display: block;
    padding: 0.6rem 0.8rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    border-left: 2px solid transparent;
    transition: var(--transition-smooth);
}

.toc-link:hover, .toc-link.active {
    color: var(--primary-neon);
    border-left-color: var(--accent-neon);
    background: linear-gradient(90deg, rgba(0, 242, 255, 0.05), transparent);
}

/* Main Content */
.main-content {
    padding: 3rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.article-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--glass-border);
}

.article-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

/* CTA Section */
.cta-section {
    padding: 6rem 2rem;
    display: flex;
    justify-content: center;
}

.cta-container {
    max-width: 800px;
    width: 100%;
    padding: 3rem;
    border-radius: 24px;
    text-align: center;
    border: 1px solid rgba(0, 242, 255, 0.2);
    box-shadow: 
        0 0 30px rgba(0, 242, 255, 0.1),
        inset 0 0 30px rgba(0, 242, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.cta-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, var(--primary-neon), transparent 30%);
    animation: rotateBorder 4s linear infinite;
    opacity: 0.1;
    z-index: -1;
}

@keyframes rotateBorder {
    100% { transform: rotate(360deg); }
}

.cta-container h2 {
    margin-bottom: 1rem;
    font-size: 2.2rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2.5rem 0;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
}

.contact-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-neon);
    box-shadow: 0 10px 30px rgba(0, 242, 255, 0.1);
}

.contact-item svg {
    width: 28px;
    height: 28px;
    color: var(--accent-neon);
}

.contact-item a {
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

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

.social-links a {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
}

.social-links a svg {
    width: 24px;
    height: 24px;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.social-links a:hover {
    background: var(--primary-neon);
    border-color: var(--primary-neon);
    box-shadow: 0 0 20px var(--primary-neon);
    transform: translateY(-3px);
}

.social-links a:hover svg {
    color: var(--bg-deep);
}

/* Footer */
.glass-footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 968px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .toc-sidebar {
        position: relative;
        top: 0;
        order: -1;
    }
    
    .toc-toggle {
        display: block;
    }
    
    .toc-list {
        display: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .toc-list.open {
        display: block;
        max-height: 500px;
    }
    
    .hero-3d-container {
        width: 300px;
        height: 300px;
    }
    
    .ring-1 { width: 220px; height: 220px; }
    .ring-2 { width: 260px; height: 260px; }
    .ring-3 { width: 300px; height: 300px; }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--glass-border);
        gap: 1.5rem;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .main-content {
        padding: 1.5rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .glitch-text {
        font-size: 1.2rem;
    }
}