/* Modern CSS Variables */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --background-light: #f9fafb;
    --background-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --section-padding: 120px 0;
    --container-padding: 0 20px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    font-weight: 800;
}

.section-title {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    transition: var(--transition-normal);
}

.navbar-brand {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-primary) !important;
}

.navbar-logo {
    height: 40px;
    width: auto;
    margin-right: 12px;
}

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

.nav-link {
    font-weight: 500;
    color: var(--text-primary) !important;
    margin: 0 0.5rem;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-color) !important;
    background-color: rgba(99, 102, 241, 0.1);
}

.nav-link.btn {
    background: var(--primary-color);
    color: white !important;
    border-radius: var(--radius-md);
}

.nav-link.btn:hover {
    background: var(--primary-dark);
    color: white !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
    padding-top: 120px;
    padding-bottom: 60px;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 1;
    max-width: 500px;
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    font-weight: 400;
    line-height: 1.6;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.tag {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-outline-primary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-outline-primary:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* Hero section buttons - using secondary color for better contrast */
.hero-section .btn-primary {
    background: var(--secondary-color);
}

.hero-section .btn-primary:hover {
    background: #fbbf24;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.3);
}

/* Hero Professional */
.hero-professional {
    position: relative;
    height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.professional-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
    width: 100%;
    max-width: 400px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition-normal);
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.stat-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary-color), #fbbf24);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.25rem;
}

.stat-content .stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.25rem;
    line-height: 1;
}

.stat-content .stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.professional-logo {
    text-align: center;
}

.company-logo {
    height: 120px;
    width: auto;
    opacity: 0.9;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-down {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    color: white;
    font-size: 1.25rem;
    animation: bounce 2s infinite;
}

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

/* Services Section */
.services-section {
    padding: var(--section-padding);
    background: var(--background-light);
}

/* AI/LLM Expertise Section */
.ai-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.ai-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="b" cx="50%" cy="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.05"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="150" cy="150" r="80" fill="url(%23b)"/><circle cx="850" cy="200" r="120" fill="url(%23b)"/><circle cx="300" cy="800" r="100" fill="url(%23b)"/></svg>');
    opacity: 0.4;
}

.ai-section .section-title,
.ai-section .section-subtitle {
    color: white;
}

.ai-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.ai-content {
    position: relative;
    z-index: 2;
}

.ai-heading {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: white;
}

.ai-description {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: 2.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.ai-capabilities {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.capability-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-normal);
}

.capability-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.capability-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--secondary-color), #fbbf24);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.capability-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: white;
}

.capability-content p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
    line-height: 1.5;
}

.ai-visual {
    position: relative;
    z-index: 2;
}

.ai-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.ai-stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: var(--transition-normal);
}

.ai-stat-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.ai-tech-stack {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.ai-tech-stack h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tech-badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
    transition: var(--transition-fast);
}

.tech-badge:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.ai-cta-section {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    position: relative;
    z-index: 2;
}

.ai-cta-section h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
}

.ai-cta-section p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.ai-cta-section .btn {
    background: var(--secondary-color);
    border: none;
    font-size: 1.125rem;
    padding: 1rem 2.5rem;
}

.ai-cta-section .btn:hover {
    background: #fbbf24;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.3);
}

/* Responsive Design for AI Section */
@media (max-width: 768px) {
    .ai-heading {
        font-size: 2rem;
    }
    
    .ai-stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .ai-stat-card {
        padding: 1.5rem 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .capability-item {
        padding: 1rem;
    }
    
    .capability-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .ai-tech-stack {
        padding: 1.5rem;
    }
    
    .ai-cta-section {
        padding: 2rem;
    }
    
    .ai-cta-section h3 {
        font-size: 1.5rem;
    }
}

.service-card {
    background: var(--background-white);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    height: 100%;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 2rem;
}

.service-icon.large {
    width: 100px;
    height: 100px;
    font-size: 2.5rem;
}

.service-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.service-card p {
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.service-features {
    list-style: none;
    padding: 0;
}

.service-features li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.featured-service {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.featured-service h3,
.featured-service p {
    color: white;
}

.featured-service .service-features li {
    color: rgba(255, 255, 255, 0.9);
}

.featured-service .service-features li::before {
    color: var(--secondary-color);
}

.featured-service .service-icon {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

/* Portfolio Section */
.portfolio-section {
    padding: var(--section-padding);
    background: var(--background-white);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    align-items: center;
    justify-items: center;
}

.client-logo {
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    filter: grayscale(100%) opacity(0.7);
    background: var(--background-light);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.client-logo:hover {
    filter: grayscale(0%) opacity(1);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.client-logo img {
    max-height: 60px;
    width: auto;
    max-width: 100%;
}

/* Contact Section */
.contact-section {
    padding: var(--section-padding);
    background: var(--background-light);
}

.contact-form-wrapper {
    background: var(--background-white);
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
}

.form-floating {
    position: relative;
}

.form-control {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    font-size: 1rem;
    transition: var(--transition-fast);
    background: var(--background-white);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    outline: none;
}

.form-floating label {
    color: var(--text-light);
    font-weight: 500;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-brand img {
    height: 50px;
    width: auto;
    margin-bottom: 1rem;
}

.footer h5 {
    color: white;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.footer p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    color: white;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-light);
}

.footer-divider {
    border-color: rgba(255, 255, 255, 0.2);
    margin: 2rem 0 1rem;
}

.copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }
    
    .hero-section {
        text-align: center;
        padding-bottom: 40px;
    }
    
    .row.align-items-center.min-vh-100 {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .hero-professional {
        height: auto;
        min-height: 400px;
        margin-top: 2rem;
    }
    
    .hero-content {
        margin-bottom: 2rem;
    }
    
    .professional-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 2rem;
        max-width: 300px;
    }
    
    .stat-item {
        padding: 1rem;
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }
    
    .stat-content .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-content .stat-label {
        font-size: 0.75rem;
    }
    
    .company-logo {
        height: 80px;
    }
    
    .service-card {
        padding: 2rem;
    }
    
    .contact-form-wrapper {
        padding: 2rem;
    }
    
    .clients-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    .hero-actions {
        justify-content: center;
        margin-bottom: 2rem;
    }
    
    .btn-lg {
        padding: 0.875rem 2rem;
        font-size: 1rem;
        min-width: 140px;
    }
}

@media (max-width: 576px) {
    .hero-tags {
        justify-content: center;
    }
    
    .tag {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
    }
    
    .service-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
    .service-card,
    .client-logo,
    .btn {
        transition: var(--transition-normal);
    }
    
    /* Scroll animations */
    .fade-in {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }
    
    .fade-in.visible {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading states */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
.form-control:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0000ff;
        --text-primary: #000000;
        --text-secondary: #000000;
        --border-color: #000000;
    }
}