body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background: #222;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

h1 {
    margin: 0;
    font-size: 2.5em;
}

nav {
    margin: 20px 0;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap; /* Allow wrapping on small screens */
}

nav ul li {
    margin: 0;
    flex: 1 1 auto; /* Allow nav items to grow/shrink */
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.2s;
    display: block;
    text-align: center;
}

nav ul li a:hover,
nav ul li a:focus {
    background: #444;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

main {
    padding: 20px;
    max-width: 900px;
    margin: 0 auto;
    box-sizing: border-box;
}

section {
    margin-bottom: 20px;
    background: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    padding: 10px 0;
    background: #007acc;
    color: #fff;
    position: relative;
    bottom: 0;
    width: 100%;
}

.alert-info {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    border-radius: 6px;
    padding: 1rem;
    margin: 1.5rem 0;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

/* Responsive images and videos */
img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Responsive navigation and layout for small screens */
@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    header h1 {
        font-size: 1.5rem;
        text-align: center;
    }
    main {
        padding: 0.5rem;
    }
    section {
        padding: