/* ============================================
   CSS RESET & VARIABLES
   ============================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-card: rgba(18, 18, 30, 0.7);
    --color-bg-glass: rgba(255, 255, 255, 0.03);
    --color-accent-primary: #6c5ce7;
    --color-accent-secondary: #a29bfe;
    --color-accent-glow: rgba(108, 92, 231, 0.3);
    --color-cyan: #00cec9;
    --color-cyan-glow: rgba(0, 206, 201, 0.25);
    --color-green: #00b894;
    --color-green-glow: rgba(0, 184, 148, 0.2);
    --color-orange: #e17055;
    --color-text-primary: #e8e8f0;
    --color-text-secondary: #9a9ab0;
    --color-text-muted: #5a5a72;
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(108, 92, 231, 0.3);
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'VT323', monospace;
    --font-retro: 'VT323', monospace;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-glow: 0 0 60px rgba(108, 92, 231, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(rgba(108, 92, 231, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(108, 92, 231, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.bg-orbs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bg-orbs .orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: orbFloat 20s ease-in-out infinite;
}

.bg-orbs .orb:nth-child(1) {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-accent-primary), transparent 70%);
    top: -10%;
    right: -5%;
    animation-delay: 0s;
}

.bg-orbs .orb:nth-child(2) {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-cyan), transparent 70%);
    bottom: 10%;
    left: -8%;
    animation-delay: -7s;
}

.bg-orbs .orb:nth-child(3) {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--color-green), transparent 70%);
    top: 50%;
    left: 50%;
    animation-delay: -14s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -40px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(40px, 30px) scale(1.02); }
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ============================================
   NAVIGATION
   ============================================ */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-smooth);
}

.nav-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-text-primary);
}

.nav-brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-cyan));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 800;
    color: #fff;
    box-shadow: 0 4px 15px var(--color-accent-glow);
}

.nav-brand-text {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-brand-text span {
    color: var(--color-accent-secondary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-glass);
}

.nav-cta {
    background: linear-gradient(135deg, var(--color-accent-primary), #8b5cf6) !important;
    color: #fff !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px var(--color-accent-glow);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 25px var(--color-accent-glow) !important;
    background: linear-gradient(135deg, #7c6cf7, #9b6cf6) !important;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    padding: 160px 0 100px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-accent-secondary);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease-out;
}

.hero-badge .pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--color-green);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--color-accent-secondary), var(--color-cyan), var(--color-accent-secondary));
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 4s linear infinite;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-primary);
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-primary), #8b5cf6);
    color: #fff;
    box-shadow: 0 4px 20px var(--color-accent-glow), inset 0 1px 0 rgba(255,255,255,0.1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px var(--color-accent-glow), inset 0 1px 0 rgba(255,255,255,0.15);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    border-color: var(--color-border-hover);
    background: rgba(108, 92, 231, 0.08);
    transform: translateY(-2px);
}

.btn-telegram {
    background: linear-gradient(135deg, #0088cc, #00aaee);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 136, 204, 0.3);
}

.btn-telegram:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 35px rgba(0, 136, 204, 0.4);
}

.btn-icon {
    font-size: 1.1em;
}

/* ============================================
   STATS BAR
   ============================================ */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 2px;
    background: var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 80px;
}

.stat-item {
    background: var(--color-bg-secondary);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition-fast);
}

.stat-item:hover {
    background: rgba(108, 92, 231, 0.05);
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    font-family: var(--font-mono);
    background: linear-gradient(135deg, var(--color-accent-secondary), var(--color-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */
.section {
    margin-bottom: 80px;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent-secondary);
    margin-bottom: 16px;
}

.section-label::before {
    content: '';
    width: 20px;
    height: 2px;
    background: var(--color-accent-primary);
    border-radius: 2px;
}

/* ============================================
   ARTICLE CONTENT
   ============================================ */
article h2 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    color: var(--color-text-primary);
    line-height: 1.3;
}

article h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 16px;
    color: var(--color-text-primary);
}

article p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    font-size: 1.02rem;
    line-height: 1.85;
}

article strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* ============================================
   FEATURE CARDS
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-cyan));
    opacity: 0;
    transition: var(--transition-smooth);
}

.feature-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.feature-icon.purple {
    background: rgba(108, 92, 231, 0.12);
    color: var(--color-accent-secondary);
}

.feature-icon.cyan {
    background: rgba(0, 206, 201, 0.12);
    color: var(--color-cyan);
}

.feature-icon.green {
    background: rgba(0, 184, 148, 0.12);
    color: var(--color-green);
}

.feature-icon.orange {
    background: rgba(225, 112, 85, 0.12);
    color: var(--color-orange);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    margin-top: 0;
    color: var(--color-text-primary);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}

/* ============================================
   INFO BOX / CALLOUT
   ============================================ */
.info-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-accent-primary);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    margin: 32px 0;
}

.info-box p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* ============================================
   FAQ ACCORDION
   ============================================ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 32px;
}

.faq-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-fast);
}

.faq-item:hover {
    border-color: var(--color-border-hover);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: transparent;
    border: none;
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-accent-secondary);
}

.faq-question .faq-toggle {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    transition: var(--transition-smooth);
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
    color: var(--color-accent-secondary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer-inner {
    padding: 0 24px 20px;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    text-align: center;
    padding: 60px 40px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    margin-bottom: 80px;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, var(--color-accent-glow), transparent 70%);
    opacity: 0.3;
    pointer-events: none;
}

.cta-section h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    position: relative;
}

.cta-section p {
    max-width: 500px;
    margin: 0 auto 32px;
    position: relative;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
}

/* ============================================
   TERMINAL / CODE BLOCK
   ============================================ */
.terminal-block {
    background: #0d0d14;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: 32px 0;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--color-border);
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-left: 8px;
    font-family: var(--font-mono);
}

.terminal-body {
    padding: 20px;
    font-family: var(--font-retro);
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--color-green);
}

.terminal-body .line {
    display: block;
    margin-bottom: 4px;
}

.terminal-body .prompt {
    color: var(--color-accent-secondary);
}

.terminal-body .comment {
    color: var(--color-text-muted);
}

.terminal-body .highlight {
    color: var(--color-cyan);
}

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    padding-top: 20px;
}

.breadcrumb a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.breadcrumb .separator {
    color: var(--color-text-muted);
    opacity: 0.4;
}

.breadcrumb .current {
    color: var(--color-text-secondary);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    border-top: 1px solid var(--color-border);
    padding: 40px 0;
    text-align: center;
}

footer p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

footer a {
    color: var(--color-accent-secondary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .hero {
        padding: 130px 0 60px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .nav-links {
        display: none;
    }

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

    .cta-section {
        padding: 40px 24px;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }

    article h2 {
        font-size: 1.4rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .stats-bar {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   SELECTION STYLING
   ============================================ */
::selection {
    background: var(--color-accent-primary);
    color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-text-muted);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-primary);
}

/* Internal link list */
.internal-links {
    list-style: none;
    margin: 24px 0;
    padding: 0;
}

.internal-links li {
    margin-bottom: 12px;
}

.internal-links a {
    color: var(--color-accent-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.internal-links a:hover {
    color: var(--color-cyan);
    transform: translateX(4px);
}

.internal-links a::before {
    content: '\2192';
    font-size: 0.9em;
    opacity: 0.6;
}

/* Updated date */
.meta-info {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    background: var(--color-bg-glass);
    padding: 4px 12px;
    border-radius: 50px;
    border: 1px solid var(--color-border);
}

/* Table of contents */
.toc {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    margin-bottom: 40px;
}

.toc-title {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 16px;
    color: var(--color-text-muted);
}

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

.toc li {
    counter-increment: toc-counter;
    margin-bottom: 10px;
}

.toc li a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 10px;
}

.toc li a::before {
    content: counter(toc-counter, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent-primary);
    opacity: 0.7;
    min-width: 20px;
}

.toc li a:hover {
    color: var(--color-accent-secondary);
}