#jumpMenu {
    position: fixed;
    left: 0;
    top: 0;
    width: 15%;
    box-sizing: border-box;
    overflow-y: auto;
    background-color: lightblue;
    height: 100%;
    z-index: 500;

}

main {
    margin-left: 15%;
}

header {
    position: fixed;
    top: 0;
    right: 0;
    width: 85%;
    height: 100px;
    background-color: #333;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

#container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 20px;
    justify-content: center;
}

header p{
    font-size: 1.5em;
    text-decoration: bold;
}

article {
    width: 300px;
}


div {
    position: relative;
    z-index: 10;
}

#thanks {
    position: fixed;
    bottom: 0;
    right: 0;
    background-color: lightgrey;
    padding: 10px;
    z-index: 1000;
}

footer {
    padding: 40px;
    background-color: lightgrey;
    margin-top: 20px;
}