body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    background-color: #f5f5f5;
    color: #222;
}
header {
    background-color: #002b45;
    color: white;
    padding: 1rem;
}
.subtitle {
    font-style: italic;
}
nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    gap: 1rem;
}
nav a {
    color: white;
    text-decoration: none;
}
.hero {
    text-align: center;
    padding: 2rem;
}
.hero iframe {
    width: 100%;
    max-width: 640px;
    height: 360px;
}
.btn {
    background-color: #002b45;
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 4px;
    margin: 0.5rem;
    display: inline-block;
}
.btn.secondary {
    background-color: gray;
}
footer {
    text-align: center;
    padding: 1rem;
    background-color: #ddd;
}