/* AI TECH ENTERPRISE SOLUTIONS - COMPLETE CSS 
   Aesthetics: Cyber-Professional, Dark Mode, High-Contrast
*/

/* --- 1. GLOBAL VARIABLES & TOKENS --- */
:root {
    /* Color Palette */
    --color-primary: #00f0ff;      /* Cyber Cyan */
    --color-secondary: #ff3366;    /* Neon Pink */
    --color-bg: #0a0a0c;           /* Deep Black */
    --color-bg-light: #121216;     /* Card/Section Background */
    --color-bg-lighter: #1a1a20;   /* Hover/Secondary Background */
    --color-surface: #1e1e26;      /* UI Elements */
    --color-border: rgba(255, 255, 255, 0.08);
    --color-text: #ffffff;
    --color-text-muted: #a0a0ab;
    --color-text-dim: #52525b;

    /* Typography */
    --font-display: 'Syne', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;

    /* Spacing System */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Radius & Transitions */
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 2. BASE RESET & LAYOUT --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; transition: var(--transition-base); }

/* --- 3. COMMON COMPONENTS (Navbar, Buttons, Headers) --- */

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 12, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
}

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

.logo-text {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -1px;
}

.logo-accent { color: var(--color-primary); }
.logo-tagline { 
    display: block;
    font-family: var(--font-mono); 
    font-size: 0.65rem; 
    text-transform: uppercase; 
    color: var(--color-text-muted); 
}

.nav-links { display: flex; gap: var(--spacing-xl); }
.nav-link { 
    font-family: var(--font-mono); 
    font-size: 0.85rem; 
    color: var(--color-text-muted); 
}
.nav-link:hover, .nav-link.active { color: var(--color-primary); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    border-radius: var(--border-radius);
    font-family: var(--font-display);
    font-weight: 700;
    cursor: pointer;
    border: none;
}

.btn-primary { 
    background: var(--color-primary); 
    color: #000; 
}

.btn-primary:hover { 
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.4); 
    transform: translateY(-2px);
}

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

/* --- 4. ANIMATION KEYFRAMES --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.5; transform: translate(-50%, -50%) scale(1.1); }
}

/* --- 5. YOUR SPECIFIC SECTION STYLES (Integrated) --- */

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 240, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 51, 102, 0.08) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-light) 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 240, 255, 0.03) 2px, rgba(0, 240, 255, 0.03) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0, 240, 255, 0.03) 2px, rgba(0, 240, 255, 0.03) 4px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content { animation: fadeInUp 0.8s ease-out; }

.hero-title { 
    margin-bottom: var(--spacing-lg); 
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
}

.title-line { display: block; line-height: 1.1; }

.title-line.highlight {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-cta { display: flex; gap: var(--spacing-md); flex-wrap: wrap; }

.hero-visual { position: relative; animation: fadeIn 1s ease-out 0.3s both; }

.visual-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding: 2rem;
}

.grid-item {
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--color-bg-lighter), var(--color-surface));
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out both;
    display: flex;
    align-items: center;
    justify-content: center;
}

.grid-item i {
    font-size: 3rem;
    color: var(--color-primary);
    z-index: 2;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    transition: all var(--transition-base);
}

.grid-item:hover i {
    transform: scale(1.15) rotate(5deg);
    text-shadow: 0 0 30px rgba(0, 240, 255, 0.9);
}

.grid-item::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 30%; height: 30%;
    background: var(--color-primary);
    border-radius: 50%;
    filter: blur(20px);
    opacity: 0.3;
    animation: pulse 3s ease-in-out infinite;
}

/* Stats Bar */
.stats-bar {
    background: var(--color-bg-light);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.stat-item { text-align: center; padding: var(--spacing-md); }

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Services Preview */
.services-preview { background: var(--color-bg); padding: var(--spacing-3xl) 0; }

.section-header { text-align: center; margin-bottom: var(--spacing-2xl); }
.section-title { font-family: var(--font-display); font-size: 2.5rem; margin-bottom: var(--spacing-sm); }
.section-subtitle { color: var(--color-text-muted); }

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: linear-gradient(135deg, var(--color-bg-light), var(--color-bg-lighter));
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.15);
}

.service-card:hover::before { transform: scaleX(1); }

.card-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: rgba(0, 240, 255, 0.05);
    line-height: 1;
    margin-bottom: var(--spacing-md);
}

.card-title { font-family: var(--font-display); font-size: 1.5rem; margin-bottom: var(--spacing-md); }
.card-description { color: var(--color-text-muted); margin-bottom: var(--spacing-lg); font-size: 0.95rem; }

.card-features { list-style: none; margin-bottom: var(--spacing-lg); }
.card-features li {
    color: var(--color-text-muted);
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: var(--spacing-xs);
    font-size: 0.85rem;
}
.card-features li::before {
    content: '▹';
    position: absolute;
    left: 0; color: var(--color-primary);
}

/* Tech Stack Marquee */
.tech-stack { background: var(--color-bg-light); padding: var(--spacing-2xl) 0; overflow: hidden; }

.tech-marquee { display: flex; overflow: hidden; gap: var(--spacing-lg); margin-top: var(--spacing-xl); }

.marquee-content {
    display: flex; gap: var(--spacing-lg);
    animation: scroll 40s linear infinite;
    flex-shrink: 0;
}

@keyframes scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-100%); }
}

.tech-item {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-dim);
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    white-space: nowrap;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--color-bg-light), var(--color-bg-lighter));
    padding: var(--spacing-3xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.cta-title { font-family: var(--font-display); font-weight: 800; margin-bottom: var(--spacing-md); }

/* Why Choose Us Section */
.why-choose-us {
    background: var(--color-bg);
    padding: var(--spacing-3xl) 0;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.benefit-card {
    background: linear-gradient(135deg, var(--color-bg-light), var(--color-bg-lighter));
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    text-align: center;
}

.benefit-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.15);
}

.benefit-icon {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

.benefit-card h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.benefit-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Process Section */
.process-section {
    background: var(--color-bg-light);
    padding: var(--spacing-3xl) 0;
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    position: relative;
}

.process-step {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    position: relative;
    transition: all var(--transition-base);
}

.process-step:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.1);
}

.step-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: rgba(0, 240, 255, 0.1);
    line-height: 1;
    margin-bottom: var(--spacing-md);
}

.process-step h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.process-step p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Testimonials Section */
.testimonials-section {
    background: var(--color-bg);
    padding: var(--spacing-3xl) 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-card {
    background: linear-gradient(135deg, var(--color-bg-light), var(--color-bg-lighter));
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.15);
}

.testimonial-stars {
    display: flex;
    gap: 0.25rem;
    margin-bottom: var(--spacing-md);
}

.testimonial-stars i {
    color: #ffc107;
    font-size: 1rem;
}

.testimonial-text {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.testimonial-author {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.author-name {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.author-title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Footer */
.footer {
    background: var(--color-bg);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-2xl);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 { font-family: var(--font-mono); font-size: 0.9rem; margin-bottom: var(--spacing-md); color: var(--color-primary); }
.footer-column a { display: block; font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: var(--spacing-xs); }
.footer-column a:hover { color: var(--color-text); }

.footer-bottom {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border: none;
    background: transparent;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

.progress-circle {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-circle-bg {
    fill: none;
    stroke: var(--color-border);
    stroke-width: 2;
}

.progress-circle-fill {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 2;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.1s linear;
    filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.4));
}

.back-to-top-text {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    line-height: 1;
}

.percentage {
    display: block;
    font-size: 1rem;
    font-weight: 800;
}

/* Responsive Back to Top */
@media (max-width: 992px) {
    .back-to-top {
        width: 55px;
        height: 55px;
        bottom: 1.5rem;
        right: 1.5rem;
    }
    
    .back-to-top-text {
        font-size: 0.65rem;
    }
    
    .percentage {
        font-size: 0.95rem;
    }
}

@media (max-width: 768px) {
    .back-to-top {
        width: 50px;
        height: 50px;
        bottom: 1.25rem;
        right: 1.25rem;
    }
    
    .progress-circle-bg,
    .progress-circle-fill {
        stroke-width: 1.5;
    }
    
    .back-to-top-text {
        font-size: 0.6rem;
    }
    
    .percentage {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .back-to-top {
        width: 48px;
        height: 48px;
        bottom: 1rem;
        right: 1rem;
    }
    
    .progress-circle-bg,
    .progress-circle-fill {
        stroke-width: 1.5;
    }
    
    .back-to-top-text {
        font-size: 0.55rem;
    }
    
    .percentage {
        font-size: 0.8rem;
    }
}

/* --- 6. RESPONSIVE QUERIES --- */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }
    
    .hero-content { 
        display: flex; 
        flex-direction: column; 
        align-items: center; 
    }
    
    .hero-visual { 
        order: -1;
        width: 100%;
    }
    
    .visual-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
        padding: 1.5rem;
    }
    
    .footer-content { 
        grid-template-columns: 1fr; 
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: clamp(1.8rem, 5vw, 3.5rem);
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .stats-grid { 
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .stat-item {
        padding: var(--spacing-sm);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.75rem;
    }
    
    .footer-links { 
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .nav-links { 
        display: none;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        max-width: 100%;
    }
    
    .hero-cta {
        justify-content: center;
        gap: var(--spacing-sm);
    }
    
    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.8rem;
    }
    
    .visual-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        padding: 1rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: var(--spacing-lg);
    }
    
    .card-title {
        font-size: 1.25rem;
    }
    
    .card-description {
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .cta-title {
        font-size: 1.5rem;
    }
    
    .hero {
        padding-top: 100px;
        min-height: auto;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .process-timeline {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: clamp(1.5rem, 4vw, 2.5rem);
        margin-bottom: var(--spacing-md);
    }
    
    .title-line {
        display: block;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-cta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .btn {
        width: 100%;
        padding: 0.75rem 1rem;
        font-size: 0.75rem;
    }
    
    .visual-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.25rem;
        padding: 0.75rem;
    }
    
    .grid-item {
        aspect-ratio: 1;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        padding: var(--spacing-xs);
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.65rem;
    }
    
    .section-header {
        margin-bottom: var(--spacing-xl);
    }
    
    .section-title {
        font-size: 1.4rem;
    }
    
    .section-subtitle {
        font-size: 0.9rem;
    }
    
    .service-card {
        padding: var(--spacing-md);
    }
    
    .card-number {
        font-size: 2rem;
    }
    
    .card-title {
        font-size: 1.1rem;
    }
    
    .card-description {
        font-size: 0.85rem;
    }
    
    .card-features li {
        font-size: 0.8rem;
    }
    
    .tech-item {
        font-size: 0.9rem;
        padding: var(--spacing-sm);
    }
    
    .cta-title {
        font-size: 1.3rem;
    }
    
    .cta-text {
        font-size: 0.95rem;
    }
    
    .footer-column h4 {
        font-size: 0.8rem;
    }
    
    .benefit-card {
        padding: var(--spacing-lg);
    }
    
    .benefit-icon {
        font-size: 2.5rem;
    }
    
    .process-step {
        padding: var(--spacing-lg);
    }
    
    .step-number {
        font-size: 2rem;
    }
    
    .testimonial-card {
        padding: var(--spacing-lg);
    }
}