body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: #333;
}

header {
    background: url('hero.jpeg') center/cover no-repeat;
    height: 90vh;
    color: white;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

nav {
    position: fixed;
    width: 100%;
    background: rgba 0,0,50,0.8;
}

nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
}

.btn {
    background: gold;
    padding: 12px 25px;
    border: none;
    cursor: pointer;
    font-weight: bold;
}

section {
    padding: 60px 20px;
    text-align: center;
}

.cards {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.card {
    width: 300px;
}

footer {
    background: #001f3f;
    color: white;
    padding: 30px;
    text-align: center;
}