html {
    height: 100%;
    width: 100%;
    margin: 0;
    background-color: #ffffff;
    font-family: "Roboto", sans-serif;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
    width: 100%;
    margin: 0;
    background-color: #ffffff;
    font-family: "Roboto", sans-serif;
}

header {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #222222;
    height: 10vh;
    width: 100%;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: #aaaaaa;
    min-height: 85%;
    height: auto;
    width: 100%;
}

footer {
    display: flex;
    background: #222222;
    height: 5vh;
    width: 100%;
    justify-content: center;
}

a {
    color: white;
    align-items: center;
    text-decoration: none;
}

.navigation {
    display: flex;
    width: 15%;
    height: 100%;
    background-color: #333333;
    color:#ffffff;
    font-size: 4vh;
    text-align: center;
    justify-content: center;
    flex-direction: column;
    margin-left: 7px;
    margin-right: 7px;
}

.navigation:hover {
    background-color: #555555;
    cursor: pointer;
}

.active {
    background-color: #555555;
}

.headline {
    display: flex;
    width: 30%;
    padding: 16px;
    background-color: #333333;
    color:#ffffff;
    line-height: 100%;
    font-size: 5vh;
    text-align: center;
    justify-content: center;    
}