:root {
    --primary-color: #003366;
    --secondary-color: #666666;
    --accent-color: #0055a4;
    --light-gray: #f4f4f4;
    --white: #ffffff;
    --dark-text: #333333;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--white);
}

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

ul {
    list-style: none;
}

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

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

/* Header & Navigation */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo img {
    height: 60px;
}

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    font-size: 0.9rem;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0,51,102,0.8), rgba(0,51,102,0.8)), url('../img/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    color: var(--white);
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--accent-color);
    color: var(--white);
    border-radius: 5px;
    font-weight: bold;
    text-transform: uppercase;
}

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

/* Sections */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.section-title .underline {
    width: 80px;
    height: 4px;
    background: var(--accent-color);
    margin: 0 auto;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
    border-left: 4px solid var(--accent-color);
    padding-left: 10px;
}

.footer-section ul li {
    margin-bottom: 10px;
}

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

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 2rem;
    }
}