body {
    margin: 0;
    font-family: Arial, sans-serif;
}

/* Header */
header {
    background: #004080;
    color: white;
    padding: 15px;
}

/* Navigation */
nav {
    background: #00264d;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

nav ul li {
    position: relative;
}

nav a {
    display: block;
    padding: 12px 20px;
    color: white;
    text-decoration: none;
}

nav ul li:hover {
    background: #0059b3;
}

/* Dropdown */
nav ul ul {
    display: none;
    position: absolute;
    background: #003366;
    top: 100%;
}

nav ul li:hover > ul {
    display: block;
}

/* Sections */
.section {
    padding: 40px;
}

.hero {
    background: #333;
    color: white;
    padding: 80px;
    text-align: center;
}

/* Cards */
.cards {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.card {
    flex: 1 1 250px;
    border: 1px solid #ddd;
    padding: 20px;
}

/* Footer */
footer {
    background: #00264d;
    color: white;
    text-align: center;
    padding: 20px;
}