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

:root {
    --navy: #1a2744;
    --navy-light: #2a3a5a;
    --navy-dark: #111b2e;
    --yellow: #f4c542;
    --yellow-light: #f9d76a;
    --yellow-dark: #d4a832;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 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);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    color: var(--navy);
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
}

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

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

/* ===== Layout ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 5rem 0;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--yellow);
    color: var(--navy);
    border-color: var(--yellow);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--navy);
    border-color: var(--navy);
}

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

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo img {
    height: 45px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-weight: 500;
    color: var(--navy);
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--yellow);
    transition: var(--transition);
}

.nav-links a:not(.btn):hover::after {
    width: 100%;
}

.nav-links .btn {
    padding: 0.625rem 1.25rem;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--navy);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    padding-top: 140px;
    padding-bottom: 4rem;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

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

.hero h1 {
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    max-width: 800px;
}

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

/* ===== Hero Image Section ===== */
.hero-image {
    padding: 0;
    background-color: var(--gray-100);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 600px;
    object-fit: cover;
}

/* ===== Clients Section ===== */
.clients {
    background-color: var(--white);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 3rem;
    max-width: 700px;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.client-card {
    text-align: center;
    padding: 2rem 1.5rem;
    border-radius: 12px;
    background-color: var(--gray-50);
    transition: var(--transition);
}

.client-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background-color: var(--white);
}

.client-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--yellow);
    border-radius: 50%;
    color: var(--navy);
}

.client-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.client-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin-bottom: 0;
}

/* ===== Services Section ===== */
.services {
    background-color: var(--navy);
    color: var(--white);
}

.services h2 {
    color: var(--white);
}

.services .section-subtitle {
    color: var(--gray-300);
}

.services-list {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.service-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 2rem;
    padding: 2.5rem;
    background-color: var(--navy-light);
    border-radius: 12px;
    border-left: 4px solid var(--yellow);
}

.service-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--yellow);
    line-height: 1;
}

.service-content h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-content p {
    color: var(--gray-300);
    margin-bottom: 1rem;
}

.service-content p:last-child {
    margin-bottom: 0;
}

/* ===== Technology Section ===== */
.technology {
    background-color: var(--gray-50);
}

.tech-intro {
    max-width: 900px;
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.tech-intro h3 {
    margin-bottom: 1rem;
}

.tech-intro p:last-child {
    margin-bottom: 0;
}

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

.tech-card {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.tech-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--navy);
    border-radius: 12px;
    color: var(--yellow);
    margin-bottom: 1.5rem;
}

.tech-card h3 {
    margin-bottom: 1rem;
}

.tech-card p {
    color: var(--gray-600);
}

.tech-card p:last-child {
    margin-bottom: 0;
}

.tech-integration {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
    color: var(--white);
    padding: 3rem;
    border-radius: 12px;
}

.tech-integration h3 {
    color: var(--yellow);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.tech-integration p {
    color: var(--gray-200);
}

.tech-integration p:last-child {
    margin-bottom: 0;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2 {
    margin-bottom: 1rem;
}

.contact-info > p {
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.contact-item svg {
    color: var(--yellow);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item strong {
    display: block;
    color: var(--navy);
    margin-bottom: 0.25rem;
}

.contact-item a,
.contact-item span {
    color: var(--gray-600);
    font-size: 0.95rem;
    line-height: 1.5;
}

.contact-item a:hover {
    color: var(--navy);
}

.contact-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.cta-box {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
    color: var(--white);
    padding: 3rem;
    border-radius: 12px;
    text-align: center;
}

.cta-box h3 {
    color: var(--yellow);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.cta-box p {
    color: var(--gray-200);
    margin-bottom: 0;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--navy-dark);
    color: var(--gray-300);
    padding: 2rem 0;
}

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

.footer-logo {
    height: 35px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 3.5rem 0;
    }
    
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero {
        padding-top: 120px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
        text-align: center;
    }
    
    .clients-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .service-item {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .service-number {
        font-size: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .tech-card,
    .tech-intro,
    .tech-integration,
    .cta-box,
    .service-item {
        padding: 1.5rem;
    }
}