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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}

h1 {
    background-color: darkblue;
    color: white;
    padding: 16px;
    text-align: center;
}

header {
    background-color: #0d3b66;

}

nav {
    background-color: darkblue;
    padding: 10px;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin-right: 1rem;
    padding: 1rem;
    display: block;
}

main {
    max-width: 840px;
}

h1 {
    color: darkblue;
}

main img {
    width: 150px;
    height: auto;
    border: 1px solid black;
    padding: 2px;
    box-shadow: 0 0 30px gray;
}

p {
    padding: 0;
}

aside {
    width: 20rem;
    margin: 1rem;
    border: 1px solid rgb(0 0 0 / 0.2);
    padding: 1rem;
    background-color: #eee;
    color: #333;
    text-align: center;
    position: relative;
}

aside img {
    width: 200px;
    height: auto;
    display: block;
    border-radius: 4px;
}

aside h2 {
    position: absolute;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
}

footer {
    margin-top: 15px;
    border-top: 1px solid #000;
    text-align: center;
}