:root {
    /* Professional Color Palette - Corporate */
    --color-primary: #1a365d;
    --color-primary-light: #2c5282;
    --color-primary-dark: #0f1f3a;

    --color-accent: #2563eb;
    --color-accent-light: #3b82f6;
    --color-accent-dark: #1e40af;

    --color-secondary: #0891b2;
    --color-secondary-light: #06b6d4;

    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #f1f5f9;

    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    --color-text: #1e293b;
    --color-text-secondary: #475569;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;

    /* Professional Gradients - Subtle */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    --gradient-accent: linear-gradient(135deg, #0891b2 0%, #0e7490 100%);
    --gradient-overlay: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.3));

    /* Spacing - Generous */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --spacing-2xl: 7rem;

    /* Typography - Professional */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Shadows - Subtle */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Border Radius - Clean */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions - Smooth */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* Navigation - Professional */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.logo-container {
    height: 100px;
}

.logo {
    height: 100%;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    align-items: center;
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-md);
    transition: color var(--transition-fast);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-link:hover {
    color: var(--color-accent);
}

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

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* Hero Section - Professional */
.hero {
    position: relative;
    min-height: 75vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) 0;
    margin-top: 110px;
    background: #0f2337;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 54, 93, 0.95) 0%, rgba(15, 31, 58, 0.95) 100%);
    z-index: 1;
}

.hero-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
}

.hero-container {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: #ffffff;
    letter-spacing: -0.02em;
}

.gradient-text {
    color: #60a5fa;
    display: inline;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: #e0e7ff;
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    font-weight: var(--font-weight-normal);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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



/* Buttons - Professional */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-md);
    text-align: center;
}

.btn-primary {
    background: var(--color-accent);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--color-accent-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: #ffffff;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
}

/* Sections - Generous Spacing */
section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    line-height: 1.2;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Services Section - Clean Grid */
.services {
    background: var(--color-bg-alt);
}

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

.service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--color-accent-light);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.service-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

.service-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.service-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

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

.service-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: var(--spacing-md);
    font-size: var(--font-size-sm);
}

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

/* About Section */
.about {
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
    line-height: 1.8;
}

.about-features {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.about-feature {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.feature-icon {
    width: 24px;
    height: 24px;
    background: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: var(--font-weight-bold);
    color: #ffffff;
    font-size: 14px;
    margin-top: 2px;
}

.feature-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.feature-text strong {
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.feature-text span {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.about-img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    margin-bottom: var(--spacing-md);
}

.tech-partners {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.tech-partners h4 {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

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

.tech-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    transition: all var(--transition-base);
}

.tech-item:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

/* Featured Section */
.featured {
    background: var(--color-bg-alt);
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-lg);
}

.featured-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.featured-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.featured-img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
}

.featured-content {
    padding: var(--spacing-lg);
}

.featured-content h3 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.featured-content p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
    line-height: 1.7;
}

/* Testimonials Section */
.testimonials {
    background: var(--color-bg);
}

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

.testimonial-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
}

.testimonial-rating {
    color: #f59e0b;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    font-style: normal;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
    padding-top: var(--spacing-md);
}

.author-name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    font-size: var(--font-size-md);
}

.author-title {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Contact Section */
.contact {
    background: var(--color-bg-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
}

.contact-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.contact-value {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

.contact-form-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-input {
    width: 100%;
    padding: 0.875rem var(--spacing-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
    color: var(--color-text-light);
}

/* Footer */
.footer {
    background: var(--color-primary-dark);
    color: #e2e8f0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer-logo img {
    height: 40px;
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1);
}

.footer-logo p {
    color: #cbd5e1;
    font-size: var(--font-size-sm);
}

.footer-links h4 {
    margin-bottom: var(--spacing-md);
    color: #ffffff;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a,
.footer-links li {
    color: #cbd5e1;
    text-decoration: none;
    transition: color var(--transition-fast);
    font-size: var(--font-size-sm);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #94a3b8;
    font-size: var(--font-size-sm);
}

/* Animations - Subtle */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 968px) {

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

    .tech-stack {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

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

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: var(--spacing-md);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.active {
        transform: translateX(0);
    }

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

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

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

    .tech-stack {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

    .footer-content {
        grid-template-columns: 1fr;
    }

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