body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f7;
}

nav {
    background-color: #333;
    color: white;
    padding: 0.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

nav ul li {
    display: inline;
}

nav ul li a {
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    padding: 0.5rem 0;
}

nav ul li a:hover,
nav ul li a:focus {
    color: #1d9bf0;
    outline: none;
}

nav ul li a i {
    margin-right: 0.5rem;
}

main {
    padding: 2rem;
    text-align: center;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    background: #000;
    margin-bottom: 1rem;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: flex-start;
    }
}