/* Agent-1: Modern Professional Design System */
/* Theme: Clean, Corporate, Trustworthy */
/* Colors: Navy Blue (#1e3a8a), Sky Blue (#0ea5e9), White (#ffffff), Gray (#64748b) */

:root {
    --primary-navy: #1e3a8a;
    --accent-sky: #0ea5e9;
    --pure-white: #ffffff;
    --soft-gray: #64748b;
    --light-gray: #f1f5f9;
    --dark-text: #0f172a;
    --success-green: #10b981;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background: var(--pure-white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--pure-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

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

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-navy);
    text-decoration: none;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

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

.nav-item {
    position: relative;
}

.nav-item.dropdown::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 20px;
    background: transparent;
}

.nav-item.dropdown:hover .dropdown-menu,
.dropdown-menu:hover {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.nav-link {
    color: var(--dark-text);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0;
}

.nav-link .arrow {
    font-size: 0.6rem;
    transition: transform 0.3s;
    margin-left: 0.25rem;
}

.nav-item.dropdown:hover .nav-link .arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 5px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--pure-white);
    min-width: 240px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    border-radius: 12px;
    border: 1px solid rgba(0,0,0,0.05);
    padding: 0.75rem 0;
    visibility: hidden;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1001;
    pointer-events: none;
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: var(--pure-white);
    border: 1px solid rgba(0,0,0,0.05);
    border-bottom: none;
    border-right: none;
    transform: translateX(-50%) rotate(45deg);
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--dark-text);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.95rem;
    position: relative;
}

.dropdown-menu a:hover {
    background: linear-gradient(90deg, rgba(14,165,233,0.1) 0%, transparent 100%);
    color: var(--accent-sky);
    padding-left: 2rem;
}

.nav-link:hover {
    color: var(--accent-sky);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-sky);
    transition: width 0.3s;
}

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

.nav-cta {
    background: var(--accent-sky);
    color: var(--pure-white);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.nav-cta:hover {
    background: var(--primary-navy);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Section */
.hero {
    margin-top: 70px;
    min-height: calc(100vh - 70px);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* Performance optimizations */
    content-visibility: auto;
    contain: layout style paint;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.2), rgba(14, 165, 233, 0.1));
    z-index: -1;
}

.hero-content {
    max-width: 700px;
    color: var(--pure-white);
    z-index: 1;
}

.hero h1 {
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

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

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
    min-width: 150px;
}

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

.btn-primary:hover {
    background: var(--primary-navy);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--light-gray);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Section Styles */
.section {
    padding: 80px 0;
}

.section-light {
    background: var(--light-gray);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    color: var(--primary-navy);
    margin-bottom: 1rem;
}

.section-title p {
    font-size: 1.125rem;
    color: var(--soft-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* Cards */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background: var(--pure-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    /* Performance & lazy loading optimizations */
    content-visibility: auto;
    contain: layout style paint;
    transition: opacity 0.3s ease, transform 0.3s ease;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Lazy loading states */
.card-image[data-src] {
    opacity: 0;
    transform: scale(1.02);
}

.card-image.loaded {
    opacity: 1;
    transform: scale(1);
}

.card-image.error {
    opacity: 0.5;
    filter: grayscale(100%);
}

/* Responsive image performance */
@media (min-width: 768px) {
    .card-image {
        height: 250px;
    }
}

@media (min-width: 1024px) {
    .card-image {
        height: 280px;
    }
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    color: var(--primary-navy);
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--soft-gray);
    margin-bottom: 1rem;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    background: var(--pure-white);
    border-radius: 12px;
    transition: var(--transition);
}

.feature:hover {
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--accent-sky), var(--primary-navy));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--pure-white);
    font-size: 2rem;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--primary-navy), var(--accent-sky));
    color: var(--pure-white);
    text-align: center;
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1), transparent);
    animation: pulse 15s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.cta h2 {
    color: var(--pure-white);
    margin-bottom: 1rem;
}

/* Footer */
.footer {
    background: var(--dark-text);
    color: var(--pure-white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: var(--accent-sky);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: var(--pure-white);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--accent-sky);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: var(--soft-gray);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-navy);
    margin: 3px 0;
    transition: var(--transition);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--pure-white);
        width: 100%;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
}