/* ===================================
   CSS Variables & Reset
   =================================== */

:root {
    --primary-navy: #1a365d;
    --primary-light: #2d4a7c;
    --accent-coral: #ff6b6b;
    --accent-hover: #ff5252;
    --text-dark: #1a202c;
    --text-gray: #4a5568;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--primary-navy);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

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

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

a:hover {
    color: var(--accent-coral);
}

ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
    color: var(--text-gray);
}

.lead {
    font-size: 1.25rem;
    color: var(--text-gray);
    font-weight: 300;
}

/* ===================================
   Layout & Container
   =================================== */

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

section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 2.5rem;
}

/* ===================================
   Header & Navigation
   =================================== */

.header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--primary-navy);
    display: flex;
    align-items: center;
}

.logo a {
    color: var(--primary-navy);
    display: flex;
    align-items: center;
}

.logo-img {
    height: 50px;
    width: auto;
    display: block;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--text-gray);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-navy);
    background-color: var(--bg-light);
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1.125rem;
    font-weight: 600;
    text-align: center;
    border-radius: 6px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-light) 100%);
    color: var(--bg-white);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

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

.hero-title {
    font-size: 3rem;
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* ===================================
   Experience Section
   =================================== */

.experience {
    background-color: var(--bg-light);
    padding: var(--spacing-lg) 0;
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    text-align: center;
}

.experience-item h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-navy);
}

.experience-item p {
    color: var(--text-gray);
    font-size: 1rem;
}

/* ===================================
   Industries Section
   =================================== */

.industries {
    background-color: var(--bg-white);
}

.industries-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg) auto;
    font-size: 1.125rem;
    color: var(--text-gray);
}

.industries-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    max-width: 900px;
    margin: 0 auto;
}

.industry-item {
    background-color: var(--bg-light);
    color: var(--primary-navy);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.industry-item:hover {
    background-color: var(--primary-navy);
    color: var(--bg-white);
    border-color: var(--primary-navy);
    transform: translateY(-2px);
}

/* ===================================
   Services Section
   =================================== */

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

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

.service-card {
    background-color: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--accent-coral);
}

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

.service-tagline {
    font-weight: 600;
    color: var(--accent-coral);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--text-gray);
    line-height: 1.7;
}

/* ===================================
   Differentiator Section
   =================================== */

.differentiator {
    background-color: var(--bg-light);
}

.differentiator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

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

.icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.differentiator-item h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-navy);
}

.differentiator-item p {
    color: var(--text-gray);
}

/* ===================================
   CTA Section
   =================================== */

.cta {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-light) 100%);
    color: var(--bg-white);
    text-align: center;
    padding: var(--spacing-xxl) 0;
}

.cta h2 {
    color: var(--bg-white);
    margin-bottom: var(--spacing-sm);
}

.cta p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

/* ===================================
   Page Hero (for About page)
   =================================== */

.page-hero {
    background-color: var(--bg-light);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.page-hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   About Content
   =================================== */

.about-content {
    background-color: var(--bg-white);
}

.about-section {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl) auto;
}

.about-section:last-child {
    margin-bottom: 0;
}

.about-section h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.about-section p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.about-section ul {
    margin-bottom: var(--spacing-md);
}

.about-section li {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--primary-navy);
    color: var(--bg-white);
    padding: var(--spacing-xl) 0 var(--spacing-md) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand .logo {
    color: var(--bg-white);
    margin-bottom: var(--spacing-sm);
}

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

.footer-brand p,
.footer-contact p {
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact h4 {
    color: var(--bg-white);
    margin-bottom: var(--spacing-sm);
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.9);
    transition: var(--transition);
}

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

.linkedin-link {
    display: inline-flex;
    align-items: center;
}

.linkedin-link svg {
    transition: var(--transition);
}

.linkedin-link:hover svg {
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

/* ===================================
   Responsive Design - Tablet
   =================================== */

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 2rem;
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    .experience-grid,
    .services-grid,
    .differentiator-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .nav {
        gap: var(--spacing-sm);
    }

    .nav-link {
        padding: 0.5rem;
        font-size: 0.9rem;
    }

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

/* ===================================
   Responsive Design - Mobile
   =================================== */

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    h1 {
        font-size: 1.75rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .logo-img {
        height: 35px;
    }

    .footer-brand .logo-img {
        height: 30px;
    }

    .nav {
        gap: var(--spacing-xs);
    }

    .nav-link {
        padding: 0.4rem 0.6rem;
        font-size: 0.875rem;
    }

    section {
        padding: var(--spacing-md) 0;
    }

    .service-card,
    .differentiator-item {
        padding: var(--spacing-md);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}