/* ========================================
   NEXA AI - Design System & Styles
   ======================================== */

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Colors */
    --color-bg-primary: #0A0A0A;
    --color-bg-secondary: #111111;
    --color-bg-card: rgba(17, 17, 17, 0.7);
    --color-accent: #00D4FF;
    --color-accent-secondary: #7B61FF;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #8B9AAB;
    --color-text-muted: #5A6578;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-success: #00FF88;
    --color-error: #FF4757;

    /* Gradients */
    --gradient-accent: linear-gradient(135deg, #00D4FF 0%, #7B61FF 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
    --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Z-index */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: transparent;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Video Background */
.video-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
}

/* Dark Overlay */
.video-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    z-index: -1;
}

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

ul,
ol {
    list-style: none;
}

img,
svg {
    max-width: 100%;
    height: auto;
    display: block;
}

button,
input,
textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
    background: transparent;
}

button {
    cursor: pointer;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    padding: var(--space-4) 0;
    transition: all var(--transition-base);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.logo-icon {
    color: var(--color-accent);
    font-size: var(--font-size-2xl);
}

.logo-text .highlight {
    color: var(--color-accent);
}

.logo-img {
    height: 150px;
    width: auto;
    object-fit: contain;
    mix-blend-mode: screen;
}

.footer-logo {
    height: 112px;
}

@media (max-width: 768px) {
    .logo-img {
        height: 48px;
    }

    .footer-logo {
        height: 40px;
    }
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

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

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

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

.nav-cta {
    padding: var(--space-2) var(--space-5);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
}

.lang-btn {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    color: var(--color-text-primary);
}

.lang-btn.active {
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.5);
}

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

.btn-ghost:hover {
    color: var(--color-text-primary);
    border-color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
}

.btn-full {
    width: 100%;
}

.btn-arrow {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* ========================================
   Section Styles
   ======================================== */
.section-header {
    margin-bottom: var(--space-12);
}

.section-header.center {
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-accent);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
}

.section-header.center .section-subtitle {
    margin: 0 auto;
}

.gradient-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12rem 0 var(--space-16);
    overflow: hidden;
}

.neural-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.6;
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: var(--gradient-glow);
    filter: blur(60px);
    pointer-events: none;
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: var(--radius-2xl);
    background: var(--gradient-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    right: 5%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    bottom: 20%;
    left: 5%;
    animation-delay: -2s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    top: 40%;
    left: 15%;
    animation-delay: -4s;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--space-8);
}

.pulse {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    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(1.5);
    }
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-6);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-10);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-16);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-2);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    animation: bounce 2s ease-in-out infinite;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-muted);
    border-radius: var(--radius-full);
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--color-text-muted);
    border-radius: var(--radius-full);
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

@keyframes scroll {

    0%,
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    50% {
        opacity: 0.3;
        transform: translateX(-50%) translateY(8px);
    }
}

/* ========================================
   Problem/Solution Section
   ======================================== */
.problem-solution {
    padding: var(--space-24) 0;
    background: var(--color-bg-secondary);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-20);
}

.problem-card {
    padding: var(--space-8);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.problem-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.15);
}

.problem-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-5);
}

.problem-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent);
}

.problem-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.problem-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

.solution-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
    padding: var(--space-12);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
}

.solution-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--space-6);
}

.solution-text strong {
    color: var(--color-text-primary);
}

.solution-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.solution-list li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-base);
}

.check-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(0, 255, 136, 0.1);
    color: var(--color-success);
    border-radius: 50%;
    font-size: var(--font-size-xs);
    font-weight: 700;
}

.solution-visual {
    position: relative;
}

.code-block {
    background: #1a1a2e;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--color-border);
}

.code-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-header .dot.red {
    background: #ff5f56;
}

.code-header .dot.yellow {
    background: #ffbd2e;
}

.code-header .dot.green {
    background: #27ca40;
}

.code-header .filename {
    margin-left: auto;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.code-block pre {
    padding: var(--space-6);
    font-family: 'Fira Code', 'Monaco', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.7;
    overflow-x: auto;
}

.code-block .keyword {
    color: #ff79c6;
}

.code-block .class-name {
    color: #8be9fd;
}

.code-block .function {
    color: #50fa7b;
}

.code-block .comment {
    color: #6272a4;
}

/* Architecture Diagram (replaces code block) */
.architecture-diagram {
    background: linear-gradient(135deg, rgba(17, 17, 17, 0.9) 0%, rgba(26, 26, 46, 0.9) 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.arch-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--color-border);
}

.arch-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

.arch-version {
    font-size: var(--font-size-xs);
    color: var(--color-accent);
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-full);
}

.arch-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-10) var(--space-6);
    gap: var(--space-2);
}

.arch-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-5);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    min-width: 90px;
}

.arch-node:hover {
    border-color: var(--color-accent);
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-2px);
}

.arch-node .node-icon {
    font-size: var(--font-size-xl);
    color: var(--color-accent);
}

.arch-node span:last-child {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.arch-node.source .node-icon {
    color: #00D4FF;
}

.arch-node.process .node-icon {
    color: #7B61FF;
}

.arch-node.logic .node-icon {
    color: #00FF88;
}

.arch-node.output .node-icon {
    color: #FFB347;
}

.arch-connector {
    display: flex;
    align-items: center;
    padding: 0 var(--space-1);
}

.flow-arrow {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    animation: flowPulse 2s ease-in-out infinite;
}

@keyframes flowPulse {

    0%,
    100% {
        opacity: 0.4;
    }

    50% {
        opacity: 1;
        color: var(--color-accent);
    }
}

.arch-footer {
    padding: var(--space-4) var(--space-6);
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}

/* ========================================
   Services Section
   ======================================== */
.services {
    padding: var(--space-24) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.service-card {
    position: relative;
    padding: var(--space-10);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.service-icon {
    position: relative;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
}

.service-icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
    position: relative;
    z-index: 1;
}

.icon-glow {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.2) 0%, transparent 70%);
    filter: blur(10px);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover .icon-glow {
    opacity: 1;
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.service-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.service-features li::before {
    content: '→';
    color: var(--color-accent);
    font-weight: 700;
}

.service-badge {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    padding: var(--space-1) var(--space-3);
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
    font-size: var(--font-size-xs);
    font-weight: 700;
    border-radius: var(--radius-full);
}

/* ========================================
   Engineering Section (NEW)
   ======================================== */
.engineering {
    padding: var(--space-24) 0;
    background: var(--color-bg-secondary);
}

.engineering-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.engineering-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--space-8);
}

.engineering-pillars {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.pillar {
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
}

.pillar-icon {
    font-size: var(--font-size-2xl);
    line-height: 1;
}

.pillar h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.pillar p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

/* Blueprint Card */
.blueprint-card {
    background: rgba(0, 20, 40, 0.8);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.blueprint-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    background: rgba(0, 212, 255, 0.05);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.blueprint-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
}

.blueprint-version {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-family: monospace;
}

.blueprint-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: var(--space-10) var(--space-6);
}

.node {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.node-source {
    background: rgba(123, 97, 255, 0.2);
    border: 2px solid #7B61FF;
    color: #7B61FF;
}

.node-n8n {
    background: rgba(255, 107, 107, 0.2);
    border: 2px solid #FF6B6B;
    color: #FF6B6B;
}

.node-python {
    background: rgba(0, 212, 255, 0.2);
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
}

.node-db {
    background: rgba(0, 255, 136, 0.2);
    border: 2px solid var(--color-success);
    color: var(--color-success);
}

.connector {
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), rgba(0, 212, 255, 0.3));
    position: relative;
}

.connector::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid var(--color-accent);
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
}

.blueprint-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.tech-stack-mini {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.tech-stack-mini span {
    padding: var(--space-1) var(--space-2);
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-accent);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-sm);
    font-family: monospace;
}

@media (max-width: 1024px) {
    .engineering-wrapper {
        grid-template-columns: 1fr;
    }

    .engineering-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    .blueprint-diagram {
        flex-wrap: wrap;
        gap: var(--space-4);
    }

    .connector {
        display: none;
    }
}

/* ========================================
   Technology Section
   ======================================== */
.technology {
    padding: var(--space-24) 0;
    background: var(--color-bg-secondary);
}

.tech-showcase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-16);
}

.tech-card {
    padding: var(--space-8);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.tech-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.2);
}

.tech-visual {
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
    position: relative;
    overflow: hidden;
}

/* Neural Network Animation */
.neural-net {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.layer {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.layer span {
    width: 12px;
    height: 12px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: neuron 1.5s ease-in-out infinite;
}

.layer span:nth-child(2) {
    animation-delay: 0.1s;
}

.layer span:nth-child(3) {
    animation-delay: 0.2s;
}

.layer span:nth-child(4) {
    animation-delay: 0.3s;
}

.layer span:nth-child(5) {
    animation-delay: 0.4s;
}

.layer span:nth-child(6) {
    animation-delay: 0.5s;
}

@keyframes neuron {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(0.8);
    }

    50% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Vision Grid Animation */
.vision-grid {
    width: 100%;
    height: 100%;
    background:
        linear-gradient(var(--color-accent) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-accent) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.2;
    position: relative;
}

.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    box-shadow: 0 0 20px var(--color-accent);
    animation: scan 2s ease-in-out infinite;
}

@keyframes scan {

    0%,
    100% {
        top: 0;
    }

    50% {
        top: 100%;
    }
}

/* Python Logo */
.python-logo {
    width: 80px;
    height: 80px;
    color: var(--color-accent);
    opacity: 0.8;
}

.tech-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.tech-content p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tech-tags span {
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-accent);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
}

.metrics-bar {
    display: flex;
    justify-content: space-around;
    padding: var(--space-10);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
}

.metric-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-2);
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    padding: var(--space-24) 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.contact-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--space-8);
}

.contact-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.benefit {
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
}

.benefit-icon {
    font-size: var(--font-size-2xl);
}

.benefit h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.benefit p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ROI Calculator */
.roi-calculator {
    padding: var(--space-8);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-6);
}

.roi-calculator h3 {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-6);
}

.calc-icon {
    font-size: var(--font-size-xl);
}

.calculator-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    margin-bottom: var(--space-6);
}

.calc-field label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.calc-field input[type="range"] {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    cursor: pointer;
    -webkit-appearance: none;
}

.calc-field input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--gradient-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-glow);
}

.slider-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    text-align: center;
    margin-top: var(--space-2);
}

.roi-results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    padding: var(--space-6);
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-xl);
}

.roi-stat {
    text-align: center;
}

.roi-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.roi-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-success);
}

/* Contact Form */
.contact-form {
    padding: var(--space-8);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
}

.contact-form h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-6);
}

.form-group {
    position: relative;
    margin-bottom: var(--space-5);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-4);
    padding-top: var(--space-6);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group label {
    position: absolute;
    top: 50%;
    left: var(--space-4);
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
    pointer-events: none;
    transition: all var(--transition-fast);
}

.form-group textarea~label {
    top: var(--space-5);
    transform: none;
}

.form-group input:focus~label,
.form-group input:not(:placeholder-shown)~label,
.form-group textarea:focus~label,
.form-group textarea:not(:placeholder-shown)~label {
    top: var(--space-2);
    font-size: var(--font-size-xs);
    color: var(--color-accent);
    transform: none;
}

.form-note {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-4);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand {
    max-width: 300px;
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-top: var(--space-4);
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: var(--space-16);
}

.footer-column h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.footer-column a {
    display: block;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-3);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ========================================
   Modal
   ======================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-bg-secondary);
    padding: var(--space-12);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--color-border);
    text-align: center;
    max-width: 400px;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 136, 0.1);
    color: var(--color-success);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    border-radius: 50%;
    margin: 0 auto var(--space-6);
}

.modal-content h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-3);
}

.modal-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: var(--font-size-5xl);
    }

    .problem-grid,
    .services-grid,
    .tech-showcase {
        grid-template-columns: repeat(2, 1fr);
    }

    .solution-block {
        grid-template-columns: 1fr;
    }

    .solution-visual {
        order: -1;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 2.5rem;
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .nav-links,
    .nav-cta {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-6);
    }

    .problem-grid,
    .services-grid,
    .tech-showcase {
        grid-template-columns: 1fr;
    }

    .metrics-bar {
        flex-wrap: wrap;
        gap: var(--space-8);
    }

    .metric {
        flex: 1 1 40%;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .floating-shapes {
        display: none;
    }

    .scroll-indicator {
        display: none;
    }
}

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

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .service-card,
    .tech-card,
    .contact-form,
    .roi-calculator {
        padding: var(--space-6);
    }
}

/* Direct Contact */
.form-direct-contact {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: var(--space-12);
    opacity: 0.8;
}

.form-direct-contact a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.form-direct-contact a:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

/* ========================================
   Animations - Fade In on Scroll
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Glassmorphism Enhancement */
@supports (backdrop-filter: blur(10px)) {

    .service-card,
    .tech-card,
    .problem-card,
    .roi-calculator,
    .contact-form {
        background: rgba(17, 17, 17, 0.6);
        backdrop-filter: blur(10px);
    }
}