/* ==========================================================================
   CSS Variables & Reset
   ========================================================================== */
:root {
    --color-primary: #0A3D6B; /* Deep water blue */
    --color-primary-light: #1A5F9E;
    --color-secondary: #0077B6; /* Mid water blue */
    --color-accent: #E63946; /* Bright accent for CTAs */
    --color-accent-hover: #D62828;
    --color-text: #2B2D42;
    --color-text-light: #5C677D;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F8F9FA;
    --color-border: #E5E7EB;
    
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-serif: 'Merriweather', Georgia, serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --border-radius: 4px;
    --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 15px rgba(0,0,0,0.1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-bg);
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-secondary);
}

ul {
    list-style: none;
}

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.lead {
    font-size: 1.25rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

/* ==========================================================================
   Layout & Container
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

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

.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .section { padding: var(--spacing-xl) 0; }
}

/* ==========================================================================
   Components
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

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

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

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

/* Cards */
.card {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease;
}

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

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

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-sm);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    text-decoration: none;
}

.nav-links {
    display: none;
}

@media (min-width: 1024px) {
    .nav-links {
        display: flex;
        gap: 2rem;
        align-items: center;
    }
    
    .mobile-menu-btn {
        display: none;
    }
}

.nav-links a {
    color: var(--color-text);
    font-weight: 500;
}

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

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 250px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius);
    padding: 1rem 0;
    z-index: 100;
}

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
    display: block;
}

.dropdown-menu a {
    display: block;
    padding: 0.5rem 1.5rem;
}

.dropdown-menu a:hover {
    background: var(--color-bg-alt);
}

/* Mobile Menu */
.mobile-menu-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-primary);
    padding: 0.5rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    color: white;
}

.hero p {
    color: rgba(255, 255, 255, 0.9);
}

.hero .btn-primary {
    margin-top: var(--spacing-md);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background-color: var(--color-text);
    color: white;
    padding: var(--spacing-xl) 0 2rem;
}

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

@media (min-width: 768px) {
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .footer-grid { grid-template-columns: repeat(4, 1fr); }
}

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

.site-footer a {
    color: rgba(255, 255, 255, 0.8);
}

.site-footer a:hover {
    color: white;
}

.site-footer ul li {
    margin-bottom: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Mobile Call Bar */
.mobile-call-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--color-accent);
    padding: 1rem;
    text-align: center;
    z-index: 1000;
    display: block;
}

.mobile-call-bar a {
    color: white;
    font-weight: bold;
    font-size: 1.125rem;
}

@media (min-width: 768px) {
    .mobile-call-bar { display: none; }
}

/* Utilities */
.text-center { text-align: center; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }