* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: linear-gradient(to bottom, #0f3057, #00587a, #008891, #e7e7de);
    font-family: Arial, Helvetica, sans-serif;
    padding: 20px;
}

header, nav, section, article, footer {
    background: linear-gradient(to right, #fefcea, #f1da36, #f6a623);
    border: 3px solid #333;
    border-radius: 18px;
    padding: 20px;
    margin-bottom: 20px;
}

header h1 {
    color: #ffffff;
    text-shadow: 3px 3px 6px #000000;
    margin-bottom: 12px;
}

section h2, article h2 {
    color: #222222;
    text-shadow: 2px 2px 4px #bbbbbb;
    margin-bottom: 12px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav a {
    color: #0044cc;
    font-weight: bold;
    text-decoration: none;
}

nav a:hover {
    color: #ff6600;
    text-decoration: underline;
}

video {
    width: 90%;
    border-radius: 12px;
    border: 2px solid #444;
}

footer p {
    text-align: center;
    font-size: 0.9rem;
}

@media screen and (max-width: 900px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }
}

@media screen and (max-width: 600px) {
    header, nav, section, article, footer {
        padding: 10px;
    }

    body {
        padding: 10px;
    }
}