/* CSS Custom Properties */
:root {
    /* Colors */
    --primary-navy: #1a365d;
    --primary-blue: #2563eb;
    --accent-blue: #3b82f6;
    --neutral-dark: #1e293b;
    --neutral-gray: #64748b;
    --neutral-light: #f1f5f9;
    --white: #ffffff;
    --text-dark: #0f172a;
    --text-gray: #475569;
    
    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    
    /* Transitions */
    --transition-base: all 0.3s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Base Typography */
body {
    font-family: var(--font-body);
    color: var(--text-dark);
    background-color: var(--white);
}

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

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-md);
}

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

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    margin-bottom: var(--spacing-sm);
}

p {
    color: var(--text-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Header */
.site-header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition-base);
}

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

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem var(--container-padding);
    min-height: 50px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-navy);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    z-index: 10;
}

.logo-img {
    height: 75px;
    width: auto;
    display: block;
    object-fit: contain;
    margin-top: -10px;
    margin-bottom: -10px;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-left: 0.75rem;
}

.logo-image {
    width: 40px;
    height: 40px;
}

/* Navigation */
.main-nav ul {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    color: var(--neutral-dark);
    font-weight: 500;
    transition: var(--transition-base);
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-blue);
    transition: var(--transition-base);
}

.main-nav a:hover {
    color: var(--primary-blue);
}

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

.main-nav a.active {
    color: var(--primary-blue);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-navy);
    transition: var(--transition-base);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-weight: 600;
    border-radius: 0.375rem;
    transition: var(--transition-base);
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

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

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

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
    color: var(--white);
    padding: var(--spacing-lg) 0;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/hero/hero-background.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero h1 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--neutral-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-cta {
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* Section Styles */
.section {
    padding: var(--spacing-sm) 0;
}

.section-alt {
    background-color: var(--neutral-light);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    max-width: 700px;
    margin: 0 auto;
}

/* Expertise Pillars */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.pillar-card {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    text-align: center;
}

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

.pillar-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-sm);
    fill: var(--primary-blue);
}

.pillar-card h3 {
    color: var(--primary-navy);
    margin-bottom: var(--spacing-sm);
}

.pillar-card p {
    color: var(--text-gray);
}

/* About Section */
.about-section {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-blue);
}

.about-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

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

.about-content p {
    font-size: 1.0625rem;
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
}

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

/* Solutions Cards */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.solution-card {
    background-color: var(--white);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

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

.solution-card-header {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
    color: var(--white);
    padding: var(--spacing-md);
    text-align: center;
}

.solution-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-sm);
    fill: var(--white);
}

.solution-card-header h3 {
    color: var(--white);
    font-size: 1.5rem;
}

.solution-card-body {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.solution-card-body p {
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.solution-card-body .btn {
    align-self: flex-start;
}

/* Footer */
.site-footer {
    background-color: var(--primary-navy);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-section h3 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.footer-tagline {
    color: var(--neutral-light);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: var(--neutral-light);
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 0.5rem;
}

.footer-contact p {
    color: var(--neutral-light);
    margin-bottom: 0.5rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.social-icon {
    width: 32px;
    height: 32px;
    fill: var(--neutral-light);
    transition: var(--transition-base);
}

.social-icon:hover {
    fill: var(--white);
    transform: translateY(-2px);
}

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

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: var(--neutral-light);
    transition: var(--transition-base);
}

.footer-legal a:hover {
    color: var(--white);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-primary {
    color: var(--primary-blue);
}

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }