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

.side {
    position: fixed;
    top: 0;
    bottom: 0;
    width: 50px;
}

.left {
    left: 0;
    background-color: rgb(0, 255, 221);
}

.right {
    right: 0;
    background-color: rgb(0, 255, 221);
}

header {
    background-color: rgb(0, 255, 221);
    color: white;
    padding: 1em 0;
    text-align: center;
}
nav {
    display: flex;
    justify-content: center;
    background-color: rgb(106, 226, 200);
}

nav a {
    color: #fff;
    padding: 14px 20px;
    text-decoration: none;
    text-transform: uppercase;
}

nav a:hover {
    background-color: rgb(0, 0, 0);
}

main {
    padding: 2em;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 2em;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    padding: 1em 0;
    background-color: #000000;
    color: rgb(0, 0, 0);
    position: fixed;
    width: 100%;
    bottom: 0;
}