body {
    font-family: 'Arial', sans-serif;
    font-size: 16px;
    margin: 0;
    padding: 0;
    background-color: #dcdcdc;
}

h1, h2 {
    font-family: 'Verdana', sans-serif;
}

p {
    font-family: 'Georgia', serif;
}

header {
    background-color: black;
    color: white;
    padding: 20px 0;
    text-align: center;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1 {
    font-size: 2.5em;
    margin: 0 0 20px 0;
    color: white;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline-block;
    margin-left: 20px;
}

nav ul li a {
    text-decoration: none;
    color: white;
    font-size: 1.2em;
}

nav ul li a:hover {
    color: orange;
}

a {
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

h4{
    text-align: center;
}

iframe {
    width: 70%;             
    height: 39.375%;        
    max-width: 800px;       
    max-height: 450px;      
    border: none;
    display: block;
    margin: 30px auto;      
}