body {
    font-family: Arial, sans-serif;
    margin: 30px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: antiquewhite;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    box-sizing: border-box;
} 

.navigation {
    display: flex;
    gap: 15px;
    align-items: center;
}

.navigation .barcode {
    margin-left: auto;
}

.suche {
    margin-top: 20px;
}

.suche input {
    padding: 5px;
}

main {
    padding-top: 100px;
    padding-left: 20px;
    padding-right: 20px;
    margin-bottom: 50px;
}

a {
    display: inline-block;
    padding: 12px 20px;
    text-decoration: none;
    border: 1px solid black;
    border-radius: 8px;
}