header { 
    background-color: black;
    box-sizing: border-box;
    padding: 5px;
    margin-top: 40px;
 } 

 header h1 {
    color: white;
    font-family: "Trebuchet MS", sans-serif;
    font-size: 2.5em;
    font-variant: small-caps;
    text-align: center;
    margin-top: 0px;
    text-shadow: -2px -2px 0 red, 2px -2px 0 red, -2px 2px 0 red, 2px 2px 0 red;
}

.inlog-succes {
    background-color: white;
    box-sizing: border-box;
    width: 400px;
    height: 200px;
    top: 550px;
}

.inlog-succes .h1 {
    color:white;
}