/* Global Variables */
:root {
    --primary-navy: #1B365D;
    --primary-teal: #2E8B8B;
    --bg-white: #FFFFFF;
    --bg-light-gray: #F0F4F8;
    --text-charcoal: #333333;
    --text-light: #F0F4F8;
    
    --font-heading: 'Montserrat', 'Raleway', sans-serif;
    --font-body: 'Open Sans', 'Lato', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --border-radius: 8px;
    --transition-speed: 0.3s;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 10px 15px rgba(0, 0, 0, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-charcoal);
    background-color: var(--bg-white);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--primary-navy);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: var(--spacing-md); }

a {
    color: var(--primary-teal);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
}

/* Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-light { background-color: var(--bg-light-gray); }
.section-dark { 
    background-color: var(--primary-navy); 
    color: var(--text-light);
}

.section-dark h2, .section-dark h3 {
    color: var(--bg-white);
}

.text-center { text-align: center; }
.text-navy { color: var(--primary-navy); }
.text-teal { color: var(--primary-teal); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.wrap { flex-wrap: wrap; }

.grid {
    display: grid;
    gap: var(--spacing-lg);
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid-4 .card { padding: var(--spacing-md) var(--spacing-sm); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    font-family: var(--font-heading);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    border: 2px solid transparent;
}

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

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

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

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

/* Header & Navigation */
header {
    background-color: var(--primary-navy);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--box-shadow);
}

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

.logo img {
    height: 60px;
    filter: brightness(0) invert(1); /* Assuming the logo is dark originally, making it white for navy header */
}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-lg);
}

.nav-links li {
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--bg-white);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-teal);
    transition: width var(--transition-speed) ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--bg-white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section Base */
.hero {
    position: relative;
    padding: calc(var(--spacing-xl) * 1.5) 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    min-height: 60vh;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(27, 54, 93, 0.6); /* Navy Overlay */
    z-index: 1;
}

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

.hero h1 {
    color: var(--bg-white);
    max-width: 800px;
    margin-bottom: var(--spacing-md);
}

.hero p.lead {
    color: var(--bg-white);
    font-size: 1.25rem;
    max-width: 700px;
    margin-bottom: var(--spacing-lg);
}

/* Footer */
footer {
    background-color: var(--text-charcoal);
    color: var(--text-light);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: auto;
}

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

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

.footer-col p {
    color: #b0b0b0;
    margin-bottom: var(--spacing-xs);
}

.footer-col a {
    color: #b0b0b0;
    display: block;
    margin-bottom: var(--spacing-xs);
    transition: color var(--transition-speed);
}

.footer-col a:hover {
    color: var(--primary-teal);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #888;
    font-size: 0.9rem;
}

/* Component Overrides & Cards */
.card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    height: 100%;
}

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

.card-icon {
    font-size: 2.5rem;
    color: var(--primary-teal);
    margin-bottom: var(--spacing-md);
}

/* Media Queries */
@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 2rem; }
    
    .section { padding: var(--spacing-lg) 0; }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--primary-navy);
        padding: var(--spacing-md);
        text-align: center;
        gap: var(--spacing-md);
        box-shadow: var(--box-shadow);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        min-height: 50vh;
        padding: var(--spacing-xl) 0;
    }
}